From 41b40ef98eb2ea8019b877e6f6177f770806aaa1 Mon Sep 17 00:00:00 2001
From: Deukhoofd <Deukhoofd@gmail.com>
Date: Sat, 8 Oct 2022 13:15:04 +0200
Subject: [PATCH] Rework of FFI, adding a value identifier, so we can keep
 knowledge of data even when data moves.

---
 src/ffi/mod.rs                                | 72 +++++++++++++++++--
 src/ffi/static_data/ability.rs                | 24 ++++---
 src/ffi/static_data/form.rs                   | 32 +++++----
 src/ffi/static_data/item.rs                   | 19 ++---
 .../libraries/growth_rate_library.rs          |  6 +-
 .../static_data/libraries/library_settings.rs |  6 +-
 src/ffi/static_data/libraries/mod.rs          | 14 ++--
 .../static_data/libraries/nature_library.rs   | 21 +++---
 src/ffi/static_data/libraries/static_data.rs  | 40 ++++++-----
 src/ffi/static_data/libraries/type_library.rs |  6 +-
 src/ffi/static_data/mod.rs                    | 30 ++++----
 src/ffi/static_data/move_data.rs              | 51 +++++++------
 src/ffi/static_data/nature.rs                 | 27 +++----
 src/ffi/static_data/species.rs                | 40 ++++++-----
 src/ffi/static_data/statistic_set.rs          | 14 ++--
 .../wasm/export_registry/mod.rs               | 16 ++---
 src/static_data/items.rs                      | 11 ++-
 src/static_data/libraries/ability_library.rs  | 14 +++-
 src/static_data/libraries/data_library.rs     |  4 +-
 .../libraries/growth_rate_library.rs          | 11 ++-
 src/static_data/libraries/item_library.rs     | 14 +++-
 src/static_data/libraries/library_settings.rs | 14 +++-
 src/static_data/libraries/move_library.rs     | 14 +++-
 src/static_data/libraries/nature_library.rs   | 19 +++--
 src/static_data/libraries/species_library.rs  | 18 +++--
 src/static_data/libraries/static_data.rs      | 11 +++
 src/static_data/libraries/type_library.rs     | 11 ++-
 src/static_data/mod.rs                        | 53 +++++++++++---
 src/static_data/moves/move_data.rs            | 11 ++-
 src/static_data/moves/secondary_effect.rs     | 11 ++-
 src/static_data/natures.rs                    | 17 ++++-
 src/static_data/species_data/ability.rs       | 11 ++-
 src/static_data/species_data/form.rs          | 11 ++-
 src/static_data/species_data/species.rs       | 37 ++++++----
 src/static_data/statistic_set.rs              | 49 ++++++++++++-
 src/utils/mod.rs                              |  3 +
 src/utils/value_identifier.rs                 | 22 ++++++
 tests/common/library_loader.rs                | 28 ++++----
 38 files changed, 582 insertions(+), 230 deletions(-)
 create mode 100644 src/utils/value_identifier.rs

diff --git a/src/ffi/mod.rs b/src/ffi/mod.rs
index a1449f1..aab36ad 100644
--- a/src/ffi/mod.rs
+++ b/src/ffi/mod.rs
@@ -16,13 +16,26 @@ macro_rules! ffi_getter {
     };
 }
 
-macro_rules! ffi_stringkey_getter {
+macro_rules! ffi_arc_getter {
+    (
+        $type:ty, $func:ident, $returns: ty
+    ) => {
+        paste::paste! {
+            #[no_mangle]
+            extern "C" fn [< $type:snake _ $func >](ptr: ExternPointer<Arc<$type>>) -> $returns {
+                ptr.as_ref().$func()
+            }
+        }
+    };
+}
+
+macro_rules! ffi_arc_stringkey_getter {
     (
         $type:ty, $func:ident
     ) => {
         paste::paste! {
             #[no_mangle]
-            extern "C" fn [< $type:lower _ $func >](ptr: ExternPointer<$type>) -> OwnedPtr<c_char> {
+            extern "C" fn [< $type:lower _ $func >](ptr: ExternPointer<Arc<$type>>) -> OwnedPtr<c_char> {
                 std::ffi::CString::new(ptr.as_ref().$func().str()).unwrap().into_raw()
             }
         }
@@ -35,11 +48,11 @@ macro_rules! ffi_vec_value_getters {
     ) => {
         paste::paste! {
             #[no_mangle]
-            extern "C" fn [< $type:lower _ $func _length>](ptr: ExternPointer<$type>) -> usize {
+            extern "C" fn [< $type:lower _ $func _length>](ptr: ExternPointer<Arc<$type>>) -> usize {
                 ptr.as_ref().$func().len()
             }
             #[no_mangle]
-            extern "C" fn [< $type:lower _ $func _get>](ptr: ExternPointer<$type>, index: usize) -> $returns {
+            extern "C" fn [< $type:lower _ $func _get>](ptr: ExternPointer<Arc<$type>>, index: usize) -> $returns {
                 *ptr.as_ref().$func().get(index).unwrap()
             }
         }
@@ -52,21 +65,24 @@ macro_rules! ffi_vec_stringkey_getters {
     ) => {
         paste::paste! {
             #[no_mangle]
-            extern "C" fn [< $type:lower _ $func _length>](ptr: ExternPointer<$type>) -> usize {
+            extern "C" fn [< $type:lower _ $func _length>](ptr: ExternPointer<Arc<$type>>) -> usize {
                 ptr.as_ref().$func().len()
             }
             #[no_mangle]
-            extern "C" fn [< $type:lower _ $func _get>](ptr: ExternPointer<$type>, index: usize) -> OwnedPtr<c_char> {
+            extern "C" fn [< $type:lower _ $func _get>](ptr: ExternPointer<Arc<$type>>, index: usize) -> OwnedPtr<c_char> {
                 CString::new(ptr.as_ref().$func().get(index).unwrap().str()).unwrap().into_raw()
             }
         }
     };
 }
 
+use crate::{ValueIdentifiable, ValueIdentifier};
+pub(self) use ffi_arc_getter;
+pub(self) use ffi_arc_stringkey_getter;
 pub(self) use ffi_getter;
-pub(self) use ffi_stringkey_getter;
 pub(self) use ffi_vec_stringkey_getters;
 pub(self) use ffi_vec_value_getters;
+use std::sync::Arc;
 
 #[repr(C)]
 pub(self) struct ExternPointer<T: ?Sized> {
@@ -98,3 +114,45 @@ impl<T> Into<ExternPointer<T>> for *mut T {
         ExternPointer { ptr: self }
     }
 }
+
+#[repr(C)]
+pub(self) struct IdentifiablePointer<T> {
+    pub ptr: *const T,
+    pub id: ValueIdentifier,
+}
+
+impl<T: ValueIdentifiable> From<Arc<T>> for IdentifiablePointer<Arc<T>> {
+    fn from(v: Arc<T>) -> Self {
+        let id = v.value_identifier();
+        Self {
+            ptr: Box::into_raw(Box::new(v)),
+            id,
+        }
+    }
+}
+
+impl<T: ValueIdentifiable> From<Box<T>> for IdentifiablePointer<T> {
+    fn from(v: Box<T>) -> Self {
+        let id = v.value_identifier();
+        Self {
+            ptr: Box::into_raw(v),
+            id,
+        }
+    }
+}
+
+impl<T: ValueIdentifiable> From<*const T> for IdentifiablePointer<T> {
+    fn from(v: *const T) -> Self {
+        let id = unsafe { v.as_ref() }.unwrap().value_identifier();
+        Self { ptr: v, id }
+    }
+}
+
+impl<T> IdentifiablePointer<T> {
+    pub fn none() -> Self {
+        Self {
+            ptr: std::ptr::null(),
+            id: Default::default(),
+        }
+    }
+}
diff --git a/src/ffi/static_data/ability.rs b/src/ffi/static_data/ability.rs
index 40e7639..0f657e5 100644
--- a/src/ffi/static_data/ability.rs
+++ b/src/ffi/static_data/ability.rs
@@ -1,8 +1,9 @@
-use crate::ffi::{BorrowedPtr, ExternPointer, OwnedPtr};
+use crate::ffi::{ExternPointer, IdentifiablePointer, OwnedPtr};
 use crate::static_data::{Ability, EffectParameter};
 use crate::StringKey;
 use std::ffi::{c_char, CStr, CString};
 use std::ptr::drop_in_place;
+use std::sync::Arc;
 
 #[no_mangle]
 unsafe extern "C" fn ability_new(
@@ -10,7 +11,7 @@ unsafe extern "C" fn ability_new(
     effect: *const c_char,
     parameters: *const OwnedPtr<EffectParameter>,
     parameters_length: usize,
-) -> OwnedPtr<Ability> {
+) -> IdentifiablePointer<Arc<Ability>> {
     let parameters = std::slice::from_raw_parts(parameters, parameters_length);
     let mut parameters_vec: Vec<EffectParameter> = Vec::with_capacity(parameters_length);
     for parameter in parameters {
@@ -20,34 +21,37 @@ unsafe extern "C" fn ability_new(
     let name: StringKey = CStr::from_ptr(name).to_str().unwrap().into();
     let effect: StringKey = CStr::from_ptr(effect).to_str().unwrap().into();
 
-    Box::into_raw(Box::new(Ability::new(&name, &effect, parameters_vec)))
+    Arc::new(Ability::new(&name, &effect, parameters_vec)).into()
 }
 
 #[no_mangle]
-unsafe extern "C" fn ability_drop(ptr: OwnedPtr<Ability>) {
+unsafe extern "C" fn ability_drop(ptr: OwnedPtr<Arc<Ability>>) {
     drop_in_place(ptr)
 }
 
 #[no_mangle]
-unsafe extern "C" fn ability_name(ptr: ExternPointer<Ability>) -> OwnedPtr<c_char> {
+unsafe extern "C" fn ability_name(ptr: ExternPointer<Arc<Ability>>) -> OwnedPtr<c_char> {
     CString::new(ptr.as_ref().name().str()).unwrap().into_raw()
 }
 
 #[no_mangle]
-unsafe extern "C" fn ability_effect(ptr: ExternPointer<Ability>) -> OwnedPtr<c_char> {
+unsafe extern "C" fn ability_effect(ptr: ExternPointer<Arc<Ability>>) -> OwnedPtr<c_char> {
     CString::new(ptr.as_ref().effect().str()).unwrap().into_raw()
 }
 
 #[no_mangle]
-unsafe extern "C" fn ability_parameter_length(ptr: ExternPointer<Ability>) -> usize {
+unsafe extern "C" fn ability_parameter_length(ptr: ExternPointer<Arc<Ability>>) -> usize {
     ptr.as_ref().parameters().len()
 }
 
 #[no_mangle]
-unsafe extern "C" fn ability_parameter_get(ptr: ExternPointer<Ability>, index: usize) -> BorrowedPtr<EffectParameter> {
+unsafe extern "C" fn ability_parameter_get(
+    ptr: ExternPointer<Arc<Ability>>,
+    index: usize,
+) -> IdentifiablePointer<EffectParameter> {
     if let Some(p) = ptr.as_ref().parameters().get(index) {
-        p as *const EffectParameter
+        (p as *const EffectParameter).into()
     } else {
-        std::ptr::null()
+        IdentifiablePointer::none()
     }
 }
diff --git a/src/ffi/static_data/form.rs b/src/ffi/static_data/form.rs
index 771145c..ccb20f3 100644
--- a/src/ffi/static_data/form.rs
+++ b/src/ffi/static_data/form.rs
@@ -1,9 +1,13 @@
-use crate::ffi::{ffi_getter, ffi_vec_stringkey_getters, ffi_vec_value_getters, BorrowedPtr, ExternPointer, OwnedPtr};
+use crate::ffi::{
+    ffi_arc_getter, ffi_vec_stringkey_getters, ffi_vec_value_getters, BorrowedPtr, ExternPointer, IdentifiablePointer,
+    OwnedPtr,
+};
 use crate::static_data::{Form, LearnableMoves, StaticStatisticSet, TypeIdentifier};
 use crate::StringKey;
 use hashbrown::HashSet;
 use std::ffi::{c_char, CStr, CString};
 use std::ptr::drop_in_place;
+use std::sync::Arc;
 
 #[no_mangle]
 unsafe extern "C" fn form_new(
@@ -21,7 +25,7 @@ unsafe extern "C" fn form_new(
     moves: OwnedPtr<LearnableMoves>,
     flags: *const *const c_char,
     flags_length: usize,
-) -> OwnedPtr<Form> {
+) -> IdentifiablePointer<Arc<Form>> {
     let name: StringKey = CStr::from_ptr(name).to_str().unwrap().into();
 
     let abilities = std::slice::from_raw_parts(abilities, abilities_length);
@@ -41,7 +45,7 @@ unsafe extern "C" fn form_new(
         flags_set.insert(CStr::from_ptr(*flag).to_str().unwrap().into());
     }
 
-    Box::into_raw(Box::new(Form::new(
+    Arc::new(Form::new(
         &name,
         height,
         weight,
@@ -52,35 +56,39 @@ unsafe extern "C" fn form_new(
         hidden_abilities_vec,
         *Box::from_raw(moves),
         flags_set,
-    )))
+    ))
+    .into()
 }
 
 #[no_mangle]
-unsafe extern "C" fn form_drop(ptr: OwnedPtr<Form>) {
+unsafe extern "C" fn form_drop(ptr: OwnedPtr<Arc<Form>>) {
     drop_in_place(ptr)
 }
 
 #[no_mangle]
-unsafe extern "C" fn form_name(ptr: ExternPointer<Form>) -> OwnedPtr<c_char> {
+unsafe extern "C" fn form_name(ptr: ExternPointer<Arc<Form>>) -> OwnedPtr<c_char> {
     let name = ptr.as_ref().name();
     CString::new(name.str()).unwrap().into_raw()
 }
 
-ffi_getter!(Form, height, f32);
-ffi_getter!(Form, weight, f32);
-ffi_getter!(Form, base_experience, u32);
+ffi_arc_getter!(Form, height, f32);
+ffi_arc_getter!(Form, weight, f32);
+ffi_arc_getter!(Form, base_experience, u32);
 
 ffi_vec_value_getters!(Form, types, TypeIdentifier);
 
-ffi_getter!(Form, base_stats, BorrowedPtr<StaticStatisticSet<u16>>);
+#[no_mangle]
+unsafe extern "C" fn form_base_stats(ptr: ExternPointer<Arc<Form>>) -> IdentifiablePointer<StaticStatisticSet<u16>> {
+    (ptr.as_ref().base_stats() as *const StaticStatisticSet<u16>).into()
+}
 
 ffi_vec_stringkey_getters!(Form, abilities);
 ffi_vec_stringkey_getters!(Form, hidden_abilities);
 
-ffi_getter!(Form, moves, BorrowedPtr<LearnableMoves>);
+ffi_arc_getter!(Form, moves, BorrowedPtr<LearnableMoves>);
 
 #[no_mangle]
-unsafe extern "C" fn form_has_flag(ptr: ExternPointer<Form>, flag: *const c_char) -> u8 {
+unsafe extern "C" fn form_has_flag(ptr: ExternPointer<Arc<Form>>, flag: *const c_char) -> u8 {
     let flag = CStr::from_ptr(flag).into();
     if ptr.as_ref().has_flag(&flag) {
         1
diff --git a/src/ffi/static_data/item.rs b/src/ffi/static_data/item.rs
index 4a6f342..bfac537 100644
--- a/src/ffi/static_data/item.rs
+++ b/src/ffi/static_data/item.rs
@@ -1,9 +1,10 @@
-use crate::ffi::{ffi_getter, ExternPointer, OwnedPtr};
+use crate::ffi::{ffi_arc_getter, ExternPointer, IdentifiablePointer, OwnedPtr};
 use crate::static_data::{BattleItemCategory, Item, ItemCategory};
 use crate::StringKey;
 use hashbrown::HashSet;
 use std::ffi::{c_char, CStr, CString};
 use std::ptr::drop_in_place;
+use std::sync::Arc;
 
 #[no_mangle]
 unsafe extern "C" fn item_new(
@@ -13,33 +14,33 @@ unsafe extern "C" fn item_new(
     price: i32,
     flags: *const *const c_char,
     flags_length: usize,
-) -> OwnedPtr<Item> {
+) -> IdentifiablePointer<Arc<Item>> {
     let flags = std::slice::from_raw_parts(flags, flags_length);
     let name: StringKey = CStr::from_ptr(name).to_str().unwrap().into();
     let mut flags_set: HashSet<StringKey> = HashSet::with_capacity(flags_length);
     for flag in flags {
         flags_set.insert(CStr::from_ptr(*flag).to_str().unwrap().into());
     }
-    Box::into_raw(Box::new(Item::new(&name, category, battle_category, price, flags_set)))
+    Arc::new(Item::new(&name, category, battle_category, price, flags_set)).into()
 }
 
 #[no_mangle]
-unsafe extern "C" fn item_drop(ptr: OwnedPtr<Item>) {
+unsafe extern "C" fn item_drop(ptr: OwnedPtr<Arc<Item>>) {
     drop_in_place(ptr)
 }
 
 #[no_mangle]
-unsafe extern "C" fn item_name(ptr: ExternPointer<Item>) -> OwnedPtr<c_char> {
+unsafe extern "C" fn item_name(ptr: ExternPointer<Arc<Item>>) -> OwnedPtr<c_char> {
     let name = ptr.as_ref().name();
     CString::new(name.str()).unwrap().into_raw()
 }
 
-ffi_getter!(Item, category, ItemCategory);
-ffi_getter!(Item, battle_category, BattleItemCategory);
-ffi_getter!(Item, price, i32);
+ffi_arc_getter!(Item, category, ItemCategory);
+ffi_arc_getter!(Item, battle_category, BattleItemCategory);
+ffi_arc_getter!(Item, price, i32);
 
 #[no_mangle]
-unsafe extern "C" fn item_has_flag(ptr: ExternPointer<Item>, flag: *const c_char) -> u8 {
+unsafe extern "C" fn item_has_flag(ptr: ExternPointer<Arc<Item>>, flag: *const c_char) -> u8 {
     let flag = CStr::from_ptr(flag).into();
     if ptr.as_ref().has_flag(&flag) {
         1
diff --git a/src/ffi/static_data/libraries/growth_rate_library.rs b/src/ffi/static_data/libraries/growth_rate_library.rs
index 8a57eda..299af6c 100644
--- a/src/ffi/static_data/libraries/growth_rate_library.rs
+++ b/src/ffi/static_data/libraries/growth_rate_library.rs
@@ -1,12 +1,12 @@
 use crate::defines::LevelInt;
-use crate::ffi::{BorrowedPtr, ExternPointer, OwnedPtr};
+use crate::ffi::{BorrowedPtr, ExternPointer, IdentifiablePointer, OwnedPtr};
 use crate::static_data::{GrowthRate, GrowthRateLibrary};
 use std::ffi::{c_char, CStr};
 use std::ptr::drop_in_place;
 
 #[no_mangle]
-extern "C" fn growth_rate_library_new(capacity: usize) -> OwnedPtr<GrowthRateLibrary> {
-    Box::into_raw(Box::new(GrowthRateLibrary::new(capacity)))
+extern "C" fn growth_rate_library_new(capacity: usize) -> IdentifiablePointer<GrowthRateLibrary> {
+    Box::new(GrowthRateLibrary::new(capacity)).into()
 }
 
 #[no_mangle]
diff --git a/src/ffi/static_data/libraries/library_settings.rs b/src/ffi/static_data/libraries/library_settings.rs
index 5fcd57e..a83c139 100644
--- a/src/ffi/static_data/libraries/library_settings.rs
+++ b/src/ffi/static_data/libraries/library_settings.rs
@@ -1,11 +1,11 @@
 use crate::defines::LevelInt;
-use crate::ffi::{ExternPointer, OwnedPtr};
+use crate::ffi::{ExternPointer, IdentifiablePointer, OwnedPtr};
 use crate::static_data::LibrarySettings;
 use std::ptr::drop_in_place;
 
 #[no_mangle]
-extern "C" fn library_settings_new(max_level: LevelInt) -> OwnedPtr<LibrarySettings> {
-    Box::into_raw(Box::new(LibrarySettings::new(max_level)))
+extern "C" fn library_settings_new(max_level: LevelInt) -> IdentifiablePointer<LibrarySettings> {
+    Box::new(LibrarySettings::new(max_level)).into()
 }
 
 #[no_mangle]
diff --git a/src/ffi/static_data/libraries/mod.rs b/src/ffi/static_data/libraries/mod.rs
index 94b1fe0..6bd0440 100644
--- a/src/ffi/static_data/libraries/mod.rs
+++ b/src/ffi/static_data/libraries/mod.rs
@@ -4,7 +4,7 @@ mod nature_library;
 mod static_data;
 mod type_library;
 
-use crate::ffi::{BorrowedPtr, OwnedPtr};
+use crate::ffi::{BorrowedPtr, IdentifiablePointer, OwnedPtr};
 use crate::static_data::*;
 use std::ffi::{c_char, CStr};
 use std::ptr::drop_in_place;
@@ -14,8 +14,8 @@ macro_rules! library_interface {
     ($library_type:ty, $return_type:ty) => {
         paste::paste! {
             #[no_mangle]
-            extern "C" fn [< $library_type:snake _new >](capacity: usize) -> OwnedPtr<$library_type> {
-                Box::into_raw(Box::new($library_type::new(capacity)))
+            extern "C" fn [< $library_type:snake _new >](capacity: usize) -> IdentifiablePointer<$library_type> {
+                Box::new($library_type::new(capacity)).into()
             }
 
             #[no_mangle]
@@ -24,7 +24,7 @@ macro_rules! library_interface {
             }
 
             #[no_mangle]
-            unsafe extern "C" fn [< $library_type:snake _add >](ptr: OwnedPtr<$library_type>, key: BorrowedPtr<c_char>, value: OwnedPtr<$return_type>) {
+            unsafe extern "C" fn [< $library_type:snake _add >](ptr: OwnedPtr<$library_type>, key: BorrowedPtr<c_char>, value: OwnedPtr<Arc<$return_type>>) {
                 let lib = ptr.as_mut().unwrap();
                 lib.add(&CStr::from_ptr(key).into(), *Box::from_raw(value));
             }
@@ -36,13 +36,13 @@ macro_rules! library_interface {
             }
 
             #[no_mangle]
-            unsafe extern "C" fn [< $library_type:snake _get >](ptr: OwnedPtr<$library_type>, key: BorrowedPtr<c_char>) -> BorrowedPtr<$return_type> {
+            unsafe extern "C" fn [< $library_type:snake _get >](ptr: OwnedPtr<$library_type>, key: BorrowedPtr<c_char>) -> IdentifiablePointer<Arc<$return_type>> {
                 let lib = ptr.as_mut().unwrap();
                 let v = lib.get(&CStr::from_ptr(key).into());
                 if let Some(value) = v {
-                    Arc::as_ptr(value)
+                    value.clone().into()
                 } else {
-                    std::ptr::null()
+                    IdentifiablePointer::none()
                 }
             }
 
diff --git a/src/ffi/static_data/libraries/nature_library.rs b/src/ffi/static_data/libraries/nature_library.rs
index d1ae012..1b64ec7 100644
--- a/src/ffi/static_data/libraries/nature_library.rs
+++ b/src/ffi/static_data/libraries/nature_library.rs
@@ -1,12 +1,12 @@
-use crate::ffi::{BorrowedPtr, ExternPointer, OwnedPtr};
+use crate::ffi::{BorrowedPtr, ExternPointer, IdentifiablePointer, OwnedPtr};
 use crate::static_data::{Nature, NatureLibrary};
 use std::ffi::{c_char, CStr, CString};
 use std::ptr::drop_in_place;
 use std::sync::Arc;
 
 #[no_mangle]
-extern "C" fn nature_library_new(capacity: usize) -> OwnedPtr<NatureLibrary> {
-    Box::into_raw(Box::new(NatureLibrary::new(capacity)))
+extern "C" fn nature_library_new(capacity: usize) -> IdentifiablePointer<NatureLibrary> {
+    Box::new(NatureLibrary::new(capacity)).into()
 }
 
 #[no_mangle]
@@ -18,31 +18,30 @@ unsafe extern "C" fn nature_library_drop(ptr: OwnedPtr<NatureLibrary>) {
 unsafe extern "C" fn nature_library_load_nature(
     ptr: ExternPointer<NatureLibrary>,
     name: BorrowedPtr<c_char>,
-    nature: OwnedPtr<Nature>,
+    nature: OwnedPtr<Arc<Nature>>,
 ) {
     ptr.as_mut()
-        .load_nature(CStr::from_ptr(name).into(), *Box::from_raw(nature))
+        .load_nature(CStr::from_ptr(name).into(), nature.as_ref().unwrap().clone())
 }
 
 #[no_mangle]
 unsafe extern "C" fn nature_library_get_nature(
     ptr: ExternPointer<NatureLibrary>,
     name: BorrowedPtr<c_char>,
-) -> BorrowedPtr<Nature> {
+) -> IdentifiablePointer<Arc<Nature>> {
     if let Some(nature) = ptr.as_ref().get_nature(&CStr::from_ptr(name).into()) {
-        Arc::into_raw(nature.clone())
+        nature.clone().into()
     } else {
-        std::ptr::null()
+        IdentifiablePointer::none()
     }
 }
 
 #[no_mangle]
 unsafe extern "C" fn nature_library_get_nature_name(
     ptr: ExternPointer<NatureLibrary>,
-    nature: BorrowedPtr<Nature>,
+    nature: BorrowedPtr<Arc<Nature>>,
 ) -> OwnedPtr<c_char> {
-    let arc = Arc::from_raw(nature);
-    CString::new(ptr.as_ref().get_nature_name(&arc).str())
+    CString::new(ptr.as_ref().get_nature_name(nature.as_ref().unwrap()).str())
         .unwrap()
         .into_raw()
 }
diff --git a/src/ffi/static_data/libraries/static_data.rs b/src/ffi/static_data/libraries/static_data.rs
index ecfefd0..e71a1d9 100644
--- a/src/ffi/static_data/libraries/static_data.rs
+++ b/src/ffi/static_data/libraries/static_data.rs
@@ -1,4 +1,4 @@
-use crate::ffi::{BorrowedPtr, ExternPointer, OwnedPtr};
+use crate::ffi::{ExternPointer, IdentifiablePointer, OwnedPtr};
 use crate::static_data::{
     AbilityLibrary, GrowthRateLibrary, ItemLibrary, LibrarySettings, MoveLibrary, NatureLibrary, SpeciesLibrary,
     StaticData, TypeLibrary,
@@ -6,8 +6,8 @@ use crate::static_data::{
 use std::ptr::drop_in_place;
 
 #[no_mangle]
-unsafe extern "C" fn static_data_new(settings: OwnedPtr<LibrarySettings>) -> OwnedPtr<StaticData> {
-    Box::into_raw(Box::new(StaticData::new(*Box::from_raw(settings))))
+unsafe extern "C" fn static_data_new(settings: OwnedPtr<LibrarySettings>) -> IdentifiablePointer<StaticData> {
+    Box::new(StaticData::new(*Box::from_raw(settings))).into()
 }
 
 #[no_mangle]
@@ -16,41 +16,43 @@ unsafe extern "C" fn static_data_drop(ptr: OwnedPtr<StaticData>) {
 }
 
 #[no_mangle]
-unsafe extern "C" fn static_data_settings(data: ExternPointer<StaticData>) -> BorrowedPtr<LibrarySettings> {
-    data.as_mut().settings() as *const LibrarySettings
+unsafe extern "C" fn static_data_settings(data: ExternPointer<StaticData>) -> IdentifiablePointer<LibrarySettings> {
+    (data.as_mut().settings() as *const LibrarySettings).into()
 }
 
 #[no_mangle]
-unsafe extern "C" fn static_data_species(data: ExternPointer<StaticData>) -> BorrowedPtr<SpeciesLibrary> {
-    data.as_mut().species_mut() as *mut SpeciesLibrary
+unsafe extern "C" fn static_data_species(data: ExternPointer<StaticData>) -> IdentifiablePointer<SpeciesLibrary> {
+    (data.as_mut().species_mut() as *const SpeciesLibrary).into()
 }
 
 #[no_mangle]
-unsafe extern "C" fn static_data_moves(data: ExternPointer<StaticData>) -> BorrowedPtr<MoveLibrary> {
-    data.as_mut().moves_mut() as *mut MoveLibrary
+unsafe extern "C" fn static_data_moves(data: ExternPointer<StaticData>) -> IdentifiablePointer<MoveLibrary> {
+    (data.as_mut().moves_mut() as *const MoveLibrary).into()
 }
 
 #[no_mangle]
-unsafe extern "C" fn static_data_items(data: ExternPointer<StaticData>) -> BorrowedPtr<ItemLibrary> {
-    data.as_mut().items_mut() as *mut ItemLibrary
+unsafe extern "C" fn static_data_items(data: ExternPointer<StaticData>) -> IdentifiablePointer<ItemLibrary> {
+    (data.as_mut().items_mut() as *const ItemLibrary).into()
 }
 
 #[no_mangle]
-unsafe extern "C" fn static_data_growth_rates(data: ExternPointer<StaticData>) -> BorrowedPtr<GrowthRateLibrary> {
-    data.as_mut().growth_rates_mut() as *mut GrowthRateLibrary
+unsafe extern "C" fn static_data_growth_rates(
+    data: ExternPointer<StaticData>,
+) -> IdentifiablePointer<GrowthRateLibrary> {
+    (data.as_mut().growth_rates_mut() as *const GrowthRateLibrary).into()
 }
 
 #[no_mangle]
-unsafe extern "C" fn static_data_types(data: ExternPointer<StaticData>) -> BorrowedPtr<TypeLibrary> {
-    data.as_mut().types_mut() as *mut TypeLibrary
+unsafe extern "C" fn static_data_types(data: ExternPointer<StaticData>) -> IdentifiablePointer<TypeLibrary> {
+    (data.as_mut().types_mut() as *const TypeLibrary).into()
 }
 
 #[no_mangle]
-unsafe extern "C" fn static_data_natures(data: ExternPointer<StaticData>) -> BorrowedPtr<NatureLibrary> {
-    data.as_mut().natures_mut() as *mut NatureLibrary
+unsafe extern "C" fn static_data_natures(data: ExternPointer<StaticData>) -> IdentifiablePointer<NatureLibrary> {
+    (data.as_mut().natures_mut() as *const NatureLibrary).into()
 }
 
 #[no_mangle]
-unsafe extern "C" fn static_data_abilities(data: ExternPointer<StaticData>) -> BorrowedPtr<AbilityLibrary> {
-    data.as_mut().abilities_mut() as *mut AbilityLibrary
+unsafe extern "C" fn static_data_abilities(data: ExternPointer<StaticData>) -> IdentifiablePointer<AbilityLibrary> {
+    (data.as_mut().abilities_mut() as *const AbilityLibrary).into()
 }
diff --git a/src/ffi/static_data/libraries/type_library.rs b/src/ffi/static_data/libraries/type_library.rs
index 9d09b87..d23302d 100644
--- a/src/ffi/static_data/libraries/type_library.rs
+++ b/src/ffi/static_data/libraries/type_library.rs
@@ -1,11 +1,11 @@
-use crate::ffi::{BorrowedPtr, ExternPointer, OwnedPtr};
+use crate::ffi::{BorrowedPtr, ExternPointer, IdentifiablePointer, OwnedPtr};
 use crate::static_data::{TypeIdentifier, TypeLibrary};
 use std::ffi::{c_char, CStr, CString};
 use std::ptr::drop_in_place;
 
 #[no_mangle]
-extern "C" fn type_library_new(capacity: usize) -> OwnedPtr<TypeLibrary> {
-    Box::into_raw(Box::new(TypeLibrary::new(capacity)))
+extern "C" fn type_library_new(capacity: usize) -> IdentifiablePointer<TypeLibrary> {
+    Box::new(TypeLibrary::new(capacity)).into()
 }
 
 #[no_mangle]
diff --git a/src/ffi/static_data/mod.rs b/src/ffi/static_data/mod.rs
index 607096d..ebd5e67 100644
--- a/src/ffi/static_data/mod.rs
+++ b/src/ffi/static_data/mod.rs
@@ -1,5 +1,6 @@
 use crate::ffi::{ExternPointer, OwnedPtr};
 use crate::static_data::EffectParameter;
+use crate::StringKey;
 use std::ffi::{c_char, CStr, CString};
 use std::ptr::drop_in_place;
 
@@ -8,32 +9,31 @@ mod form;
 mod growth_rate;
 mod item;
 mod learnable_moves;
+mod libraries;
 mod move_data;
 mod nature;
 mod species;
 mod statistic_set;
-mod libraries;
 
 #[no_mangle]
 extern "C" fn effect_parameter_new_bool(value: u8) -> OwnedPtr<EffectParameter> {
-    Box::into_raw(Box::new(EffectParameter::Bool(value == 1)))
+    Box::into_raw(Box::new((value == 1).into()))
 }
 
 #[no_mangle]
 extern "C" fn effect_parameter_new_int(value: i64) -> OwnedPtr<EffectParameter> {
-    Box::into_raw(Box::new(EffectParameter::Int(value)))
+    Box::into_raw(Box::new(value.into()))
 }
 
 #[no_mangle]
 extern "C" fn effect_parameter_new_float(value: f32) -> OwnedPtr<EffectParameter> {
-    Box::into_raw(Box::new(EffectParameter::Float(value)))
+    Box::into_raw(Box::new(value.into()))
 }
 
 #[no_mangle]
 unsafe extern "C" fn effect_parameter_new_string(value: *const c_char) -> OwnedPtr<EffectParameter> {
-    Box::into_raw(Box::new(EffectParameter::String(
-        CStr::from_ptr(value).to_str().unwrap().into(),
-    )))
+    let sk: StringKey = CStr::from_ptr(value).to_str().unwrap().into();
+    Box::into_raw(Box::new(sk.into()))
 }
 
 #[no_mangle]
@@ -44,17 +44,17 @@ unsafe extern "C" fn effect_parameter_drop(ptr: OwnedPtr<EffectParameter>) {
 #[no_mangle]
 extern "C" fn effect_parameter_get_type(ptr: ExternPointer<EffectParameter>) -> u8 {
     match ptr.as_ref() {
-        EffectParameter::Bool(_) => 0,
-        EffectParameter::Int(_) => 1,
-        EffectParameter::Float(_) => 2,
-        EffectParameter::String(_) => 3,
+        EffectParameter::Bool(_, _) => 0,
+        EffectParameter::Int(_, _) => 1,
+        EffectParameter::Float(_, _) => 2,
+        EffectParameter::String(_, _) => 3,
     }
 }
 
 #[no_mangle]
 extern "C" fn effect_parameter_get_as_bool(ptr: ExternPointer<EffectParameter>) -> u8 {
     let p = ptr.as_ref();
-    if let EffectParameter::Bool(b) = p {
+    if let EffectParameter::Bool(_, b) = p {
         return if *b { 1 } else { 0 };
     }
     panic!("Unexpected effect parameter. Expected bool, was: {}", p);
@@ -63,7 +63,7 @@ extern "C" fn effect_parameter_get_as_bool(ptr: ExternPointer<EffectParameter>)
 #[no_mangle]
 extern "C" fn effect_parameter_get_as_int(ptr: ExternPointer<EffectParameter>) -> i64 {
     let p = ptr.as_ref();
-    if let EffectParameter::Int(b) = p {
+    if let EffectParameter::Int(_, b) = p {
         return *b;
     }
     panic!("Unexpected effect parameter. Expected int, was: {}", p);
@@ -72,7 +72,7 @@ extern "C" fn effect_parameter_get_as_int(ptr: ExternPointer<EffectParameter>) -
 #[no_mangle]
 extern "C" fn effect_parameter_get_as_float(ptr: ExternPointer<EffectParameter>) -> f32 {
     let p = ptr.as_ref();
-    if let EffectParameter::Float(b) = p {
+    if let EffectParameter::Float(_, b) = p {
         return *b;
     }
     panic!("Unexpected effect parameter. Expected float, was: {}", p);
@@ -81,7 +81,7 @@ extern "C" fn effect_parameter_get_as_float(ptr: ExternPointer<EffectParameter>)
 #[no_mangle]
 extern "C" fn effect_parameter_get_as_string(ptr: ExternPointer<EffectParameter>) -> OwnedPtr<c_char> {
     let p = ptr.as_ref();
-    if let EffectParameter::String(b) = p {
+    if let EffectParameter::String(_, b) = p {
         return CString::new(b.str().to_string()).unwrap().into_raw();
     }
     panic!("Unexpected effect parameter. Expected string, was: {}", p);
diff --git a/src/ffi/static_data/move_data.rs b/src/ffi/static_data/move_data.rs
index 9a6be4d..e28233a 100644
--- a/src/ffi/static_data/move_data.rs
+++ b/src/ffi/static_data/move_data.rs
@@ -1,9 +1,10 @@
-use crate::ffi::{ffi_getter, BorrowedPtr, ExternPointer, OwnedPtr};
+use crate::ffi::{ffi_arc_getter, ffi_getter, BorrowedPtr, ExternPointer, IdentifiablePointer, OwnedPtr};
 use crate::static_data::{EffectParameter, MoveCategory, MoveData, MoveTarget, SecondaryEffect, TypeIdentifier};
 use crate::StringKey;
 use hashbrown::HashSet;
 use std::ffi::{c_char, CStr, CString};
 use std::ptr::drop_in_place;
+use std::sync::Arc;
 
 #[no_mangle]
 unsafe extern "C" fn move_data_new(
@@ -18,7 +19,7 @@ unsafe extern "C" fn move_data_new(
     secondary_effect: *mut SecondaryEffect,
     flags: *const *const c_char,
     flags_length: usize,
-) -> OwnedPtr<MoveData> {
+) -> IdentifiablePointer<Arc<MoveData>> {
     let flags = std::slice::from_raw_parts(flags, flags_length);
     let name: StringKey = CStr::from_ptr(name).to_str().unwrap().into();
     let mut flags_set: HashSet<StringKey> = HashSet::with_capacity(flags_length);
@@ -30,7 +31,7 @@ unsafe extern "C" fn move_data_new(
     } else {
         Some(*Box::from_raw(secondary_effect))
     };
-    Box::into_raw(Box::new(MoveData::new(
+    Arc::new(MoveData::new(
         &name,
         move_type,
         category,
@@ -41,40 +42,43 @@ unsafe extern "C" fn move_data_new(
         priority,
         secondary_effect,
         flags_set,
-    )))
+    ))
+    .into()
 }
 
 #[no_mangle]
-unsafe extern "C" fn move_data_drop(ptr: OwnedPtr<MoveData>) {
+unsafe extern "C" fn move_data_drop(ptr: OwnedPtr<Arc<MoveData>>) {
     drop_in_place(ptr)
 }
 
 #[no_mangle]
-unsafe extern "C" fn move_data_name(ptr: ExternPointer<MoveData>) -> OwnedPtr<c_char> {
+unsafe extern "C" fn move_data_name(ptr: ExternPointer<Arc<MoveData>>) -> OwnedPtr<c_char> {
     let name = ptr.as_ref().name();
     CString::new(name.str()).unwrap().into_raw()
 }
 
-ffi_getter!(MoveData, move_type, TypeIdentifier);
-ffi_getter!(MoveData, category, MoveCategory);
-ffi_getter!(MoveData, base_power, u8);
-ffi_getter!(MoveData, accuracy, u8);
-ffi_getter!(MoveData, base_usages, u8);
-ffi_getter!(MoveData, target, MoveTarget);
-ffi_getter!(MoveData, priority, i8);
+ffi_arc_getter!(MoveData, move_type, TypeIdentifier);
+ffi_arc_getter!(MoveData, category, MoveCategory);
+ffi_arc_getter!(MoveData, base_power, u8);
+ffi_arc_getter!(MoveData, accuracy, u8);
+ffi_arc_getter!(MoveData, base_usages, u8);
+ffi_arc_getter!(MoveData, target, MoveTarget);
+ffi_arc_getter!(MoveData, priority, i8);
 
 #[no_mangle]
-unsafe extern "C" fn move_data_secondary_effect(ptr: ExternPointer<MoveData>) -> BorrowedPtr<SecondaryEffect> {
+unsafe extern "C" fn move_data_secondary_effect(
+    ptr: ExternPointer<Arc<MoveData>>,
+) -> IdentifiablePointer<SecondaryEffect> {
     let effect = ptr.as_ref().secondary_effect();
     if let Some(v) = effect {
-        v as *const SecondaryEffect
+        (v as *const SecondaryEffect).into()
     } else {
-        std::ptr::null()
+        IdentifiablePointer::none()
     }
 }
 
 #[no_mangle]
-unsafe extern "C" fn move_data_has_flag(ptr: ExternPointer<MoveData>, flag: *const c_char) -> u8 {
+unsafe extern "C" fn move_data_has_flag(ptr: ExternPointer<Arc<MoveData>>, flag: *const c_char) -> u8 {
     let flag = CStr::from_ptr(flag).into();
     if ptr.as_ref().has_flag(&flag) {
         1
@@ -89,18 +93,19 @@ unsafe extern "C" fn secondary_effect_new(
     effect_name: BorrowedPtr<c_char>,
     parameters: *mut OwnedPtr<EffectParameter>,
     parameters_length: usize,
-) -> OwnedPtr<SecondaryEffect> {
+) -> IdentifiablePointer<SecondaryEffect> {
     let parameter_slice = std::slice::from_raw_parts(parameters, parameters_length);
     let mut parameters = Vec::with_capacity(parameters_length);
     for parameter in parameter_slice {
         parameters.push(*Box::from_raw(*parameter))
     }
 
-    Box::into_raw(Box::new(SecondaryEffect::new(
+    Box::new(SecondaryEffect::new(
         chance,
         CStr::from_ptr(effect_name).into(),
         parameters,
-    )))
+    ))
+    .into()
 }
 
 #[no_mangle]
@@ -124,10 +129,10 @@ unsafe extern "C" fn secondary_effect_parameter_length(ptr: ExternPointer<Second
 unsafe extern "C" fn secondary_effect_parameter_get(
     ptr: ExternPointer<SecondaryEffect>,
     index: usize,
-) -> BorrowedPtr<EffectParameter> {
+) -> IdentifiablePointer<EffectParameter> {
     if let Some(v) = ptr.as_ref().parameters().get(index) {
-        v as *const EffectParameter
+        (v as *const EffectParameter).into()
     } else {
-        std::ptr::null()
+        IdentifiablePointer::none()
     }
 }
diff --git a/src/ffi/static_data/nature.rs b/src/ffi/static_data/nature.rs
index 1b5cd9a..50bb171 100644
--- a/src/ffi/static_data/nature.rs
+++ b/src/ffi/static_data/nature.rs
@@ -1,6 +1,7 @@
-use crate::ffi::{ffi_getter, ExternPointer, OwnedPtr};
+use crate::ffi::{ExternPointer, IdentifiablePointer, OwnedPtr};
 use crate::static_data::{Nature, Statistic};
 use std::ptr::drop_in_place;
+use std::sync::Arc;
 
 #[no_mangle]
 extern "C" fn nature_new(
@@ -8,24 +9,26 @@ extern "C" fn nature_new(
     decrease_stat: Statistic,
     increase_modifier: f32,
     decrease_modifier: f32,
-) -> OwnedPtr<Nature> {
-    Box::into_raw(Box::new(Nature::new(
-        increase_stat,
-        decrease_stat,
-        increase_modifier,
-        decrease_modifier,
-    )))
+) -> IdentifiablePointer<Arc<Nature>> {
+    Nature::new(increase_stat, decrease_stat, increase_modifier, decrease_modifier).into()
 }
 
 #[no_mangle]
-unsafe extern "C" fn nature_drop(ptr: OwnedPtr<Nature>) {
+unsafe extern "C" fn nature_drop(ptr: OwnedPtr<Arc<Nature>>) {
     drop_in_place(ptr)
 }
 
-ffi_getter!(Nature, increased_stat, Statistic);
-ffi_getter!(Nature, decreased_stat, Statistic);
+#[no_mangle]
+extern "C" fn nature_increased_stat(ptr: ExternPointer<Arc<Nature>>) -> Statistic {
+    ptr.as_ref().increased_stat()
+}
 
 #[no_mangle]
-extern "C" fn nature_get_stat_modifier(ptr: ExternPointer<Nature>, stat: Statistic) -> f32 {
+extern "C" fn nature_decreased_stat(ptr: ExternPointer<Arc<Nature>>) -> Statistic {
+    ptr.as_ref().decreased_stat()
+}
+
+#[no_mangle]
+extern "C" fn nature_get_stat_modifier(ptr: ExternPointer<Arc<Nature>>, stat: Statistic) -> f32 {
     ptr.as_ref().get_stat_modifier(stat)
 }
diff --git a/src/ffi/static_data/species.rs b/src/ffi/static_data/species.rs
index dc8a8a3..7b79478 100644
--- a/src/ffi/static_data/species.rs
+++ b/src/ffi/static_data/species.rs
@@ -1,4 +1,4 @@
-use crate::ffi::{ffi_getter, ffi_stringkey_getter, BorrowedPtr, ExternPointer, OwnedPtr};
+use crate::ffi::{ffi_arc_getter, ffi_arc_stringkey_getter, BorrowedPtr, ExternPointer, IdentifiablePointer, OwnedPtr};
 use crate::static_data::{Form, Species};
 use crate::StringKey;
 use hashbrown::HashSet;
@@ -13,10 +13,10 @@ unsafe extern "C" fn species_new(
     gender_rate: f32,
     growth_rate: BorrowedPtr<c_char>,
     capture_rate: u8,
-    default_form: OwnedPtr<Form>,
+    default_form: OwnedPtr<Arc<Form>>,
     flags: *const *const c_char,
     flags_length: usize,
-) -> OwnedPtr<Species> {
+) -> IdentifiablePointer<Arc<Species>> {
     let name: StringKey = CStr::from_ptr(name).to_str().unwrap().into();
     let growth_rate: StringKey = CStr::from_ptr(growth_rate).to_str().unwrap().into();
 
@@ -25,44 +25,48 @@ unsafe extern "C" fn species_new(
     for flag in flags {
         flags_set.insert(CStr::from_ptr(*flag).to_str().unwrap().into());
     }
-    Box::into_raw(Box::new(Species::new(
+    Arc::new(Species::new(
         id,
         &name,
         gender_rate,
         &growth_rate,
         capture_rate,
-        *Box::from_raw(default_form),
+        default_form.as_ref().unwrap().clone(),
         flags_set,
-    )))
+    ))
+    .into()
 }
 
 #[no_mangle]
-unsafe extern "C" fn species_drop(ptr: OwnedPtr<Species>) {
+unsafe extern "C" fn species_drop(ptr: OwnedPtr<Arc<Species>>) {
     drop_in_place(ptr);
 }
 
-ffi_getter!(Species, id, u16);
-ffi_stringkey_getter!(Species, name);
-ffi_getter!(Species, gender_rate, f32);
-ffi_stringkey_getter!(Species, growth_rate);
-ffi_getter!(Species, capture_rate, u8);
+ffi_arc_getter!(Species, id, u16);
+ffi_arc_stringkey_getter!(Species, name);
+ffi_arc_getter!(Species, gender_rate, f32);
+ffi_arc_stringkey_getter!(Species, growth_rate);
+ffi_arc_getter!(Species, capture_rate, u8);
 
 #[no_mangle]
 unsafe extern "C" fn species_add_form(
-    species: ExternPointer<Species>,
+    species: ExternPointer<Arc<Species>>,
     name: BorrowedPtr<c_char>,
-    form: OwnedPtr<Form>,
+    form: OwnedPtr<Arc<Form>>,
 ) {
-    let form = *Box::from_raw(form);
+    let form = form.as_ref().unwrap().clone();
     species.as_mut().add_form(CStr::from_ptr(name).into(), form)
 }
 
 #[no_mangle]
-unsafe extern "C" fn species_get_form(species: ExternPointer<Species>, name: BorrowedPtr<c_char>) -> BorrowedPtr<Form> {
+unsafe extern "C" fn species_get_form(
+    species: ExternPointer<Arc<Species>>,
+    name: BorrowedPtr<c_char>,
+) -> IdentifiablePointer<Arc<Form>> {
     let form = species.as_ref().get_form(&CStr::from_ptr(name).into());
     if let Some(form) = form {
-        Arc::as_ptr(form)
+        form.into()
     } else {
-        std::ptr::null()
+        IdentifiablePointer::none()
     }
 }
diff --git a/src/ffi/static_data/statistic_set.rs b/src/ffi/static_data/statistic_set.rs
index 90cb867..92f4e02 100644
--- a/src/ffi/static_data/statistic_set.rs
+++ b/src/ffi/static_data/statistic_set.rs
@@ -1,4 +1,4 @@
-use crate::ffi::{ExternPointer, OwnedPtr};
+use crate::ffi::{ExternPointer, IdentifiablePointer, OwnedPtr};
 use crate::static_data::{StaticStatisticSet, Statistic, StatisticSet};
 use std::ptr::drop_in_place;
 
@@ -14,15 +14,15 @@ extern "C" fn [<statistic_set_ $num_type _new>](
     special_attack: $num_type,
     special_defense: $num_type,
     speed: $num_type,
-) -> OwnedPtr<StatisticSet<$num_type>> {
-    Box::into_raw(Box::new(StatisticSet::new(
+) -> IdentifiablePointer<StatisticSet<$num_type>> {
+    Box::new(StatisticSet::new(
         hp,
         attack,
         defense,
         special_attack,
         special_defense,
         speed,
-    )))
+    )).into()
 }
 
 #[no_mangle]
@@ -73,15 +73,15 @@ extern "C" fn [<static_statistic_set_ $num_type _new>](
     special_attack: $num_type,
     special_defense: $num_type,
     speed: $num_type,
-) -> OwnedPtr<StaticStatisticSet<$num_type>> {
-    Box::into_raw(Box::new(StaticStatisticSet::new(
+) -> IdentifiablePointer<StaticStatisticSet<$num_type>> {
+    Box::new(StaticStatisticSet::new(
         hp,
         attack,
         defense,
         special_attack,
         special_defense,
         speed,
-    )))
+    )).into()
 }
 
 #[no_mangle]
diff --git a/src/script_implementations/wasm/export_registry/mod.rs b/src/script_implementations/wasm/export_registry/mod.rs
index eae7ac9..0e4c1e2 100755
--- a/src/script_implementations/wasm/export_registry/mod.rs
+++ b/src/script_implementations/wasm/export_registry/mod.rs
@@ -138,10 +138,10 @@ fn string_key_get_str(env: FunctionEnvMut<WebAssemblyEnv>, string_key: ExternRef
 fn effect_parameter_get_type(env: FunctionEnvMut<WebAssemblyEnv>, parameter: ExternRef<EffectParameter>) -> u8 {
     let v = parameter.value_func(&env).unwrap();
     match v {
-        EffectParameter::Bool(_) => 1,
-        EffectParameter::Int(_) => 2,
-        EffectParameter::Float(_) => 3,
-        EffectParameter::String(_) => 4,
+        EffectParameter::Bool(_, _) => 1,
+        EffectParameter::Int(_, _) => 2,
+        EffectParameter::Float(_, _) => 3,
+        EffectParameter::String(_, _) => 4,
     }
 }
 
@@ -149,7 +149,7 @@ fn effect_parameter_get_type(env: FunctionEnvMut<WebAssemblyEnv>, parameter: Ext
 fn effect_parameter_as_bool(env: FunctionEnvMut<WebAssemblyEnv>, parameter: ExternRef<EffectParameter>) -> u8 {
     let v = parameter.value_func(&env).unwrap();
     match v {
-        EffectParameter::Bool(b) => {
+        EffectParameter::Bool(_, b) => {
             if *b {
                 1
             } else {
@@ -164,7 +164,7 @@ fn effect_parameter_as_bool(env: FunctionEnvMut<WebAssemblyEnv>, parameter: Exte
 fn effect_parameter_as_int(env: FunctionEnvMut<WebAssemblyEnv>, parameter: ExternRef<EffectParameter>) -> i64 {
     let v = parameter.value_func(&env).unwrap();
     match v {
-        EffectParameter::Int(i) => *i,
+        EffectParameter::Int(_, i) => *i,
         _ => panic!("Unexpected parameter type!"),
     }
 }
@@ -173,7 +173,7 @@ fn effect_parameter_as_int(env: FunctionEnvMut<WebAssemblyEnv>, parameter: Exter
 fn effect_parameter_as_float(env: FunctionEnvMut<WebAssemblyEnv>, parameter: ExternRef<EffectParameter>) -> f32 {
     let v = parameter.value_func(&env).unwrap();
     match v {
-        EffectParameter::Float(f) => *f,
+        EffectParameter::Float(_, f) => *f,
         _ => panic!("Unexpected parameter type!"),
     }
 }
@@ -185,7 +185,7 @@ fn effect_parameter_as_string(
 ) -> ExternRef<StringKey> {
     let v = parameter.value_func(&env).unwrap();
     match v {
-        EffectParameter::String(s) => ExternRef::func_new(&env, s),
+        EffectParameter::String(_, s) => ExternRef::func_new(&env, s),
         _ => panic!("Unexpected parameter type!"),
     }
 }
diff --git a/src/static_data/items.rs b/src/static_data/items.rs
index 4bb60e6..8c1671b 100755
--- a/src/static_data/items.rs
+++ b/src/static_data/items.rs
@@ -2,7 +2,7 @@ use hashbrown::HashSet;
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
 
-use crate::StringKey;
+use crate::{StringKey, ValueIdentifiable, ValueIdentifier};
 
 /// An item category defines which bag slot items are stored in.
 #[derive(Debug, Copy, Clone)]
@@ -48,6 +48,8 @@ pub enum BattleItemCategory {
 #[derive(Debug)]
 #[cfg_attr(feature = "wasm", derive(unique_type_id_derive::UniqueTypeId))]
 pub struct Item {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The name of the item.
     name: StringKey,
     /// Which bag slot items are stored in.
@@ -70,6 +72,7 @@ impl Item {
         flags: HashSet<StringKey>,
     ) -> Item {
         Item {
+            identifier: Default::default(),
             name: name.clone(),
             category,
             battle_category,
@@ -104,3 +107,9 @@ impl Item {
         self.flags.contains(key)
     }
 }
+
+impl ValueIdentifiable for Item {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
diff --git a/src/static_data/libraries/ability_library.rs b/src/static_data/libraries/ability_library.rs
index 5a57823..bca6768 100755
--- a/src/static_data/libraries/ability_library.rs
+++ b/src/static_data/libraries/ability_library.rs
@@ -4,11 +4,13 @@ use indexmap::IndexMap;
 
 use crate::static_data::Ability;
 use crate::static_data::DataLibrary;
-use crate::StringKey;
+use crate::{StringKey, ValueIdentifiable, ValueIdentifier};
 
 /// A storage for all abilities that can be used in this data library.
 #[derive(Debug)]
 pub struct AbilityLibrary {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The underlying map for the library.
     map: IndexMap<StringKey, Arc<Ability>>,
 }
@@ -17,6 +19,7 @@ impl AbilityLibrary {
     /// Instantiates a new ability library.
     pub fn new(capacity: usize) -> AbilityLibrary {
         AbilityLibrary {
+            identifier: Default::default(),
             map: IndexMap::with_capacity(capacity),
         }
     }
@@ -31,18 +34,25 @@ impl DataLibrary<'_, Ability> for AbilityLibrary {
     }
 }
 
+impl ValueIdentifiable for AbilityLibrary {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
+
 #[cfg(test)]
 pub mod tests {
     use crate::static_data::Ability;
     use crate::static_data::AbilityLibrary;
     use crate::static_data::DataLibrary;
     use crate::StringKey;
+    use std::sync::Arc;
 
     pub fn build() -> AbilityLibrary {
         let mut lib = AbilityLibrary::new(1);
         lib.add(
             &StringKey::new("test_ability".into()),
-            Ability::new(&"test_ability".into(), &"test_ability".into(), Vec::new()),
+            Arc::new(Ability::new(&"test_ability".into(), &"test_ability".into(), Vec::new())),
         );
         // Drops borrow as mut
 
diff --git a/src/static_data/libraries/data_library.rs b/src/static_data/libraries/data_library.rs
index 9aab330..45158a5 100755
--- a/src/static_data/libraries/data_library.rs
+++ b/src/static_data/libraries/data_library.rs
@@ -14,8 +14,8 @@ pub trait DataLibrary<'a, T: 'a> {
     fn get_modify(&mut self) -> &mut IndexMap<StringKey, Arc<T>>;
 
     /// Adds a new value to the library.
-    fn add(&mut self, key: &StringKey, value: T) {
-        self.get_modify().insert(key.clone(), Arc::new(value));
+    fn add(&mut self, key: &StringKey, value: Arc<T>) {
+        self.get_modify().insert(key.clone(), value);
     }
 
     /// Removes a value from the library.
diff --git a/src/static_data/libraries/growth_rate_library.rs b/src/static_data/libraries/growth_rate_library.rs
index 1630381..4ac29a1 100755
--- a/src/static_data/libraries/growth_rate_library.rs
+++ b/src/static_data/libraries/growth_rate_library.rs
@@ -5,10 +5,12 @@ use hashbrown::HashMap;
 
 use crate::defines::LevelInt;
 use crate::static_data::GrowthRate;
-use crate::StringKey;
+use crate::{StringKey, ValueIdentifiable, ValueIdentifier};
 
 /// A library to store all growth rates.
 pub struct GrowthRateLibrary {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The underlying data structure.
     growth_rates: HashMap<StringKey, Box<dyn GrowthRate>>,
 }
@@ -17,6 +19,7 @@ impl GrowthRateLibrary {
     /// Instantiates a new growth rate library with a capacity.
     pub fn new(capacity: usize) -> GrowthRateLibrary {
         GrowthRateLibrary {
+            identifier: Default::default(),
             growth_rates: HashMap::with_capacity(capacity),
         }
     }
@@ -36,6 +39,12 @@ impl GrowthRateLibrary {
     }
 }
 
+impl ValueIdentifiable for GrowthRateLibrary {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
+
 impl Debug for GrowthRateLibrary {
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
         f.debug_struct("GrowthRateLibrary").finish()
diff --git a/src/static_data/libraries/item_library.rs b/src/static_data/libraries/item_library.rs
index 14daa98..cd9b943 100755
--- a/src/static_data/libraries/item_library.rs
+++ b/src/static_data/libraries/item_library.rs
@@ -4,12 +4,14 @@ use indexmap::IndexMap;
 
 use crate::static_data::DataLibrary;
 use crate::static_data::Item;
-use crate::StringKey;
+use crate::{StringKey, ValueIdentifiable, ValueIdentifier};
 
 /// A library to store all items.
 #[derive(Debug)]
 #[cfg_attr(feature = "wasm", derive(unique_type_id_derive::UniqueTypeId))]
 pub struct ItemLibrary {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The underlying data structure.
     map: IndexMap<StringKey, Arc<Item>>,
 }
@@ -18,6 +20,7 @@ impl ItemLibrary {
     /// Instantiates a new Item Library.
     pub fn new(capacity: usize) -> ItemLibrary {
         ItemLibrary {
+            identifier: Default::default(),
             map: IndexMap::with_capacity(capacity),
         }
     }
@@ -33,9 +36,16 @@ impl DataLibrary<'_, Item> for ItemLibrary {
     }
 }
 
+impl ValueIdentifiable for ItemLibrary {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
+
 #[cfg(test)]
 pub mod tests {
     use hashbrown::HashSet;
+    use std::sync::Arc;
 
     use crate::static_data::libraries::data_library::DataLibrary;
     use crate::static_data::libraries::item_library::ItemLibrary;
@@ -57,7 +67,7 @@ pub mod tests {
         let m = build_item();
         // Borrow as mut so we can insert
         let w = &mut lib;
-        w.add(&"foo".into(), m);
+        w.add(&"foo".into(), Arc::new(m));
         // Drops borrow as mut
 
         lib
diff --git a/src/static_data/libraries/library_settings.rs b/src/static_data/libraries/library_settings.rs
index ade746b..8745e06 100755
--- a/src/static_data/libraries/library_settings.rs
+++ b/src/static_data/libraries/library_settings.rs
@@ -1,9 +1,12 @@
 use crate::defines::LevelInt;
+use crate::{ValueIdentifiable, ValueIdentifier};
 
 /// This library holds several misc settings for the library.
 #[derive(Debug)]
 #[cfg_attr(feature = "wasm", derive(unique_type_id_derive::UniqueTypeId))]
 pub struct LibrarySettings {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The highest level a Pokemon can be.
     maximum_level: LevelInt,
 }
@@ -11,7 +14,10 @@ pub struct LibrarySettings {
 impl LibrarySettings {
     /// Creates a new settings library.
     pub fn new(maximum_level: LevelInt) -> Self {
-        Self { maximum_level }
+        Self {
+            identifier: Default::default(),
+            maximum_level,
+        }
     }
 
     /// The highest level a Pokemon can be.
@@ -19,3 +25,9 @@ impl LibrarySettings {
         self.maximum_level
     }
 }
+
+impl ValueIdentifiable for LibrarySettings {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
diff --git a/src/static_data/libraries/move_library.rs b/src/static_data/libraries/move_library.rs
index 9e943b4..15b3aba 100755
--- a/src/static_data/libraries/move_library.rs
+++ b/src/static_data/libraries/move_library.rs
@@ -4,12 +4,14 @@ use indexmap::IndexMap;
 
 use crate::static_data::DataLibrary;
 use crate::static_data::MoveData;
-use crate::StringKey;
+use crate::{StringKey, ValueIdentifiable, ValueIdentifier};
 
 /// A library to store all data for moves.
 #[derive(Debug)]
 #[cfg_attr(feature = "wasm", derive(unique_type_id_derive::UniqueTypeId))]
 pub struct MoveLibrary {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The underlying map.
     map: IndexMap<StringKey, Arc<MoveData>>,
 }
@@ -18,6 +20,7 @@ impl MoveLibrary {
     /// Instantiates a new Move Library.
     pub fn new(capacity: usize) -> MoveLibrary {
         MoveLibrary {
+            identifier: Default::default(),
             map: IndexMap::with_capacity(capacity),
         }
     }
@@ -32,9 +35,16 @@ impl DataLibrary<'_, MoveData> for MoveLibrary {
     }
 }
 
+impl ValueIdentifiable for MoveLibrary {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
+
 #[cfg(test)]
 pub mod tests {
     use hashbrown::HashSet;
+    use std::sync::Arc;
 
     use crate::static_data::libraries::data_library::DataLibrary;
     use crate::static_data::libraries::move_library::MoveLibrary;
@@ -61,7 +71,7 @@ pub mod tests {
         let m = build_move();
         // Borrow as mut so we can insert
         let w = &mut lib;
-        w.add(&StringKey::new("foo".into()), m);
+        w.add(&StringKey::new("foo".into()), Arc::new(m));
         // Drops borrow as mut
 
         lib
diff --git a/src/static_data/libraries/nature_library.rs b/src/static_data/libraries/nature_library.rs
index 9244eee..8b6b5bf 100644
--- a/src/static_data/libraries/nature_library.rs
+++ b/src/static_data/libraries/nature_library.rs
@@ -1,11 +1,13 @@
 use crate::static_data::Nature;
-use crate::StringKey;
+use crate::{StringKey, ValueIdentifiable, ValueIdentifier};
 use hashbrown::HashMap;
 use std::sync::Arc;
 
 /// A library of all natures that can be used, stored by their names.
 #[derive(Debug)]
 pub struct NatureLibrary {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The underlying data structure.
     map: HashMap<StringKey, Arc<Nature>>,
 }
@@ -14,13 +16,14 @@ impl NatureLibrary {
     /// Creates a new nature library with a given capacity.
     pub fn new(capacity: usize) -> Self {
         NatureLibrary {
+            identifier: Default::default(),
             map: HashMap::with_capacity(capacity),
         }
     }
 
     /// Adds a new nature with name to the library.
-    pub fn load_nature(&mut self, name: StringKey, nature: Nature) {
-        self.map.insert(name, Arc::new(nature));
+    pub fn load_nature(&mut self, name: StringKey, nature: Arc<Nature>) {
+        self.map.insert(name, nature);
     }
 
     /// Gets a nature by name.
@@ -29,11 +32,11 @@ impl NatureLibrary {
     }
 
     /// Finds a nature name by nature.
-    pub fn get_nature_name(&self, nature: &Arc<Nature>) -> StringKey {
+    pub fn get_nature_name(&self, nature: &Nature) -> StringKey {
         for kv in &self.map {
             // As natures can't be copied, and should always be the same reference as the value
             // in the map, we just compare by reference.
-            if Arc::ptr_eq(kv.1, nature) {
+            if std::ptr::eq(Arc::as_ptr(kv.1), nature) {
                 return kv.0.clone();
             }
         }
@@ -41,6 +44,12 @@ impl NatureLibrary {
     }
 }
 
+impl ValueIdentifiable for NatureLibrary {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
+
 #[cfg(test)]
 pub mod tests {
     use crate::static_data::statistics::Statistic;
diff --git a/src/static_data/libraries/species_library.rs b/src/static_data/libraries/species_library.rs
index e1e31a1..1dfb0fc 100755
--- a/src/static_data/libraries/species_library.rs
+++ b/src/static_data/libraries/species_library.rs
@@ -4,12 +4,14 @@ use indexmap::IndexMap;
 
 use crate::static_data::DataLibrary;
 use crate::static_data::Species;
-use crate::StringKey;
+use crate::{StringKey, ValueIdentifiable, ValueIdentifier};
 
 /// A library to store all data for Pokemon species.
 #[derive(Debug)]
 #[cfg_attr(feature = "wasm", derive(unique_type_id_derive::UniqueTypeId))]
 pub struct SpeciesLibrary {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The underlying map.
     map: IndexMap<StringKey, Arc<Species>>,
 }
@@ -18,6 +20,7 @@ impl SpeciesLibrary {
     /// Instantiates a new Species Library.
     pub fn new(capacity: usize) -> SpeciesLibrary {
         SpeciesLibrary {
+            identifier: Default::default(),
             map: IndexMap::with_capacity(capacity),
         }
     }
@@ -32,9 +35,16 @@ impl<'a> DataLibrary<'a, Species> for SpeciesLibrary {
     }
 }
 
+impl ValueIdentifiable for SpeciesLibrary {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
+
 #[cfg(test)]
 pub mod tests {
     use hashbrown::HashSet;
+    use std::sync::Arc;
 
     use crate::static_data::libraries::data_library::DataLibrary;
     use crate::static_data::libraries::species_library::SpeciesLibrary;
@@ -50,7 +60,7 @@ pub mod tests {
             0.5,
             &"test_growthrate".into(),
             0,
-            Form::new(
+            Arc::new(Form::new(
                 &"default".into(),
                 0.0,
                 0.0,
@@ -61,7 +71,7 @@ pub mod tests {
                 Vec::new(),
                 LearnableMoves::new(),
                 HashSet::new(),
-            ),
+            )),
             HashSet::new(),
         )
     }
@@ -71,7 +81,7 @@ pub mod tests {
         let species = build_species();
         // Borrow as mut so we can insert
         let w = &mut lib;
-        w.add(&"foo".into(), species);
+        w.add(&"foo".into(), Arc::new(species));
         // Drops borrow as mut
 
         lib
diff --git a/src/static_data/libraries/static_data.rs b/src/static_data/libraries/static_data.rs
index 9259008..51cf3a6 100755
--- a/src/static_data/libraries/static_data.rs
+++ b/src/static_data/libraries/static_data.rs
@@ -6,11 +6,14 @@ use crate::static_data::MoveLibrary;
 use crate::static_data::NatureLibrary;
 use crate::static_data::SpeciesLibrary;
 use crate::static_data::TypeLibrary;
+use crate::{ValueIdentifiable, ValueIdentifier};
 
 /// The storage for all different libraries.
 #[derive(Debug)]
 #[cfg_attr(feature = "wasm", derive(unique_type_id_derive::UniqueTypeId))]
 pub struct StaticData {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// Several misc settings for the library.
     settings: LibrarySettings,
     /// All data for Pokemon species.
@@ -33,6 +36,7 @@ impl StaticData {
     /// Instantiates a new data collection.
     pub fn new(settings: LibrarySettings) -> Self {
         Self {
+            identifier: Default::default(),
             settings,
             species: SpeciesLibrary::new(0),
             moves: MoveLibrary::new(0),
@@ -106,6 +110,12 @@ impl StaticData {
     }
 }
 
+impl ValueIdentifiable for StaticData {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
+
 #[cfg(test)]
 pub mod test {
     use crate::static_data::libraries::library_settings::LibrarySettings;
@@ -116,6 +126,7 @@ pub mod test {
 
     pub fn build() -> StaticData {
         StaticData {
+            identifier: Default::default(),
             settings: LibrarySettings::new(100),
             species: species_library::tests::build(),
             moves: move_library::tests::build(),
diff --git a/src/static_data/libraries/type_library.rs b/src/static_data/libraries/type_library.rs
index b0d4af8..d2b95f5 100755
--- a/src/static_data/libraries/type_library.rs
+++ b/src/static_data/libraries/type_library.rs
@@ -1,7 +1,7 @@
 use atomig::Atom;
 use hashbrown::HashMap;
 
-use crate::StringKey;
+use crate::{StringKey, ValueIdentifiable, ValueIdentifier};
 
 /// A unique key that can be used to store a reference to a type. Opaque reference to a byte
 /// internally.
@@ -28,6 +28,8 @@ impl From<TypeIdentifier> for u8 {
 #[derive(Debug)]
 #[cfg_attr(feature = "wasm", derive(unique_type_id_derive::UniqueTypeId))]
 pub struct TypeLibrary {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// A list of types
     types: HashMap<StringKey, TypeIdentifier>,
     /// The effectiveness of the different types against each other.
@@ -38,6 +40,7 @@ impl TypeLibrary {
     /// Instantiates a new type library with a specific capacity.
     pub fn new(capacity: usize) -> TypeLibrary {
         TypeLibrary {
+            identifier: Default::default(),
             types: HashMap::with_capacity(capacity),
             effectiveness: vec![],
         }
@@ -93,6 +96,12 @@ impl TypeLibrary {
     }
 }
 
+impl ValueIdentifiable for TypeLibrary {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
+
 #[cfg(test)]
 pub mod tests {
     use assert_approx_eq::assert_approx_eq;
diff --git a/src/static_data/mod.rs b/src/static_data/mod.rs
index aa58926..0c23e8b 100755
--- a/src/static_data/mod.rs
+++ b/src/static_data/mod.rs
@@ -1,4 +1,4 @@
-use crate::StringKey;
+use crate::{StringKey, ValueIdentifiable, ValueIdentifier};
 #[doc(inline)]
 pub use growth_rates::*;
 #[doc(inline)]
@@ -40,22 +40,57 @@ mod statistics;
 #[cfg_attr(feature = "wasm", derive(unique_type_id_derive::UniqueTypeId))]
 pub enum EffectParameter {
     /// A boolean value.
-    Bool(bool),
+    Bool(ValueIdentifier, bool),
     /// An integer value. Stored as a 64 bit int to deal with potentially large numbers.
-    Int(i64),
+    Int(ValueIdentifier, i64),
     /// A float value. Stored as a 32 bit float.
-    Float(f32),
+    Float(ValueIdentifier, f32),
     /// A string value.
-    String(StringKey),
+    String(ValueIdentifier, StringKey),
+}
+
+impl Into<EffectParameter> for bool {
+    fn into(self) -> EffectParameter {
+        EffectParameter::Bool(Default::default(), self)
+    }
+}
+
+impl Into<EffectParameter> for i64 {
+    fn into(self) -> EffectParameter {
+        EffectParameter::Int(Default::default(), self)
+    }
+}
+
+impl Into<EffectParameter> for f32 {
+    fn into(self) -> EffectParameter {
+        EffectParameter::Float(Default::default(), self)
+    }
+}
+
+impl Into<EffectParameter> for StringKey {
+    fn into(self) -> EffectParameter {
+        EffectParameter::String(Default::default(), self)
+    }
 }
 
 impl Display for EffectParameter {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
         match self {
-            EffectParameter::Bool(v) => f.write_fmt(format_args!("EffectParameter::Bool({})", v)),
-            EffectParameter::Int(v) => f.write_fmt(format_args!("EffectParameter::Int({})", v)),
-            EffectParameter::Float(v) => f.write_fmt(format_args!("EffectParameter::Float({})", v)),
-            EffectParameter::String(v) => f.write_fmt(format_args!("EffectParameter::String({})", v)),
+            EffectParameter::Bool(_, v) => f.write_fmt(format_args!("EffectParameter::Bool({})", v)),
+            EffectParameter::Int(_, v) => f.write_fmt(format_args!("EffectParameter::Int({})", v)),
+            EffectParameter::Float(_, v) => f.write_fmt(format_args!("EffectParameter::Float({})", v)),
+            EffectParameter::String(_, v) => f.write_fmt(format_args!("EffectParameter::String({})", v)),
+        }
+    }
+}
+
+impl ValueIdentifiable for EffectParameter {
+    fn value_identifier(&self) -> ValueIdentifier {
+        match self {
+            EffectParameter::Bool(i, _) => *i,
+            EffectParameter::Int(i, _) => *i,
+            EffectParameter::Float(i, _) => *i,
+            EffectParameter::String(i, _) => *i,
         }
     }
 }
diff --git a/src/static_data/moves/move_data.rs b/src/static_data/moves/move_data.rs
index 03feb52..9ffa746 100755
--- a/src/static_data/moves/move_data.rs
+++ b/src/static_data/moves/move_data.rs
@@ -3,7 +3,7 @@ use hashbrown::HashSet;
 use serde::{Deserialize, Serialize};
 
 use crate::static_data::{SecondaryEffect, TypeIdentifier};
-use crate::StringKey;
+use crate::{StringKey, ValueIdentifiable, ValueIdentifier};
 
 /// The move category defines what global kind of move this move is.
 #[derive(Copy, Clone, PartialEq, Eq, Debug)]
@@ -63,6 +63,8 @@ pub enum MoveTarget {
 #[derive(PartialEq, Debug)]
 #[cfg_attr(feature = "wasm", derive(unique_type_id_derive::UniqueTypeId))]
 pub struct MoveData {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The name of the move.
     name: StringKey,
     /// The attacking type of the move.
@@ -101,6 +103,7 @@ impl MoveData {
         flags: HashSet<StringKey>,
     ) -> MoveData {
         MoveData {
+            identifier: Default::default(),
             name: name.clone(),
             move_type,
             category,
@@ -163,3 +166,9 @@ impl MoveData {
         self.flags.contains::<u32>(&key_hash)
     }
 }
+
+impl ValueIdentifiable for MoveData {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
diff --git a/src/static_data/moves/secondary_effect.rs b/src/static_data/moves/secondary_effect.rs
index 72c1f77..d4ab9bd 100755
--- a/src/static_data/moves/secondary_effect.rs
+++ b/src/static_data/moves/secondary_effect.rs
@@ -1,9 +1,11 @@
 use crate::static_data::EffectParameter;
-use crate::StringKey;
+use crate::{StringKey, ValueIdentifiable, ValueIdentifier};
 
 /// A secondary effect is an effect on a move that happens after it hits.
 #[derive(PartialEq, Debug)]
 pub struct SecondaryEffect {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The chance in percentages that the effect triggers. -1 to make it always trigger.
     chance: f32,
     /// The name of the effect.
@@ -16,6 +18,7 @@ impl SecondaryEffect {
     /// Instantiates a new Secondary Effect.
     pub fn new(chance: f32, effect_name: StringKey, parameters: Vec<EffectParameter>) -> SecondaryEffect {
         SecondaryEffect {
+            identifier: Default::default(),
             chance,
             effect_name,
             parameters,
@@ -36,6 +39,12 @@ impl SecondaryEffect {
     }
 }
 
+impl ValueIdentifiable for SecondaryEffect {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use assert_approx_eq::assert_approx_eq;
diff --git a/src/static_data/natures.rs b/src/static_data/natures.rs
index ed31573..c4b9180 100755
--- a/src/static_data/natures.rs
+++ b/src/static_data/natures.rs
@@ -1,9 +1,13 @@
 use crate::static_data::Statistic;
+use crate::{ValueIdentifiable, ValueIdentifier};
+use std::sync::Arc;
 
 /// A nature is an attribute on a Pokemon that modifies the effective base stats on a Pokemon. They
 /// can have an increased statistic and a decreased statistic, or be neutral.
 #[derive(Debug)]
 pub struct Nature {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The stat that should receive the increased modifier.
     increase_stat: Statistic,
     /// The stat that should receive the decreased modifier.
@@ -21,13 +25,14 @@ impl Nature {
         decrease_stat: Statistic,
         increase_modifier: f32,
         decrease_modifier: f32,
-    ) -> Self {
-        Self {
+    ) -> Arc<Self> {
+        Arc::new(Self {
+            identifier: Default::default(),
             increase_stat,
             decrease_stat,
             increase_modifier,
             decrease_modifier,
-        }
+        })
     }
 
     /// The stat that should receive the increased modifier.
@@ -52,3 +57,9 @@ impl Nature {
         }
     }
 }
+
+impl ValueIdentifiable for Nature {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
diff --git a/src/static_data/species_data/ability.rs b/src/static_data/species_data/ability.rs
index 5110427..3318a51 100755
--- a/src/static_data/species_data/ability.rs
+++ b/src/static_data/species_data/ability.rs
@@ -1,9 +1,11 @@
 use crate::static_data::EffectParameter;
-use crate::StringKey;
+use crate::{StringKey, ValueIdentifiable, ValueIdentifier};
 
 /// An ability is a passive effect in battle that is attached to a Pokemon.
 #[derive(Debug)]
 pub struct Ability {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The name of the ability.
     name: StringKey,
     /// The name of the script effect of the ability.
@@ -16,6 +18,7 @@ impl Ability {
     /// Instantiates a new ability.
     pub fn new(name: &StringKey, effect: &StringKey, parameters: Vec<EffectParameter>) -> Self {
         Self {
+            identifier: Default::default(),
             name: name.clone(),
             effect: effect.clone(),
             parameters,
@@ -36,6 +39,12 @@ impl Ability {
     }
 }
 
+impl ValueIdentifiable for Ability {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
+
 /// An ability index allows us to find an ability on a form. It combines a bool for whether the
 /// ability is hidden or not, and then an index of the ability.
 #[derive(Copy, Clone, Debug, Eq, PartialEq)]
diff --git a/src/static_data/species_data/form.rs b/src/static_data/species_data/form.rs
index 5949512..c98377a 100755
--- a/src/static_data/species_data/form.rs
+++ b/src/static_data/species_data/form.rs
@@ -4,13 +4,15 @@ use crate::static_data::Statistic;
 use crate::static_data::TypeIdentifier;
 use crate::static_data::{Ability, StaticStatisticSet};
 use crate::static_data::{AbilityIndex, LearnableMoves};
-use crate::Random;
 use crate::StringKey;
+use crate::{Random, ValueIdentifiable, ValueIdentifier};
 
 /// A form is a variant of a specific species. A species always has at least one form, but can have
 /// many more.
 #[derive(Debug)]
 pub struct Form {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The name of the form.
     name: StringKey,
     /// The height of the form in meters.
@@ -48,6 +50,7 @@ impl Form {
         flags: HashSet<StringKey>,
     ) -> Form {
         Form {
+            identifier: Default::default(),
             name: name.clone(),
             height,
             weight,
@@ -156,3 +159,9 @@ impl Form {
         self.flags.contains(key)
     }
 }
+
+impl ValueIdentifiable for Form {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
diff --git a/src/static_data/species_data/species.rs b/src/static_data/species_data/species.rs
index 1885b56..8e5f99e 100755
--- a/src/static_data/species_data/species.rs
+++ b/src/static_data/species_data/species.rs
@@ -1,16 +1,20 @@
 use std::sync::{Arc, LazyLock};
 
 use hashbrown::{HashMap, HashSet};
+use parking_lot::lock_api::RwLockReadGuard;
+use parking_lot::{RawRwLock, RwLock};
 
 use crate::static_data::Form;
 use crate::static_data::Gender;
-use crate::Random;
 use crate::StringKey;
+use crate::{Random, ValueIdentifiable, ValueIdentifier};
 
 /// The data belonging to a Pokemon with certain characteristics.
 #[derive(Debug)]
 #[cfg_attr(feature = "wasm", derive(unique_type_id_derive::UniqueTypeId))]
 pub struct Species {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The national dex identifier of the Pokemon.
     id: u16,
     /// The name of the Pokemon.
@@ -23,7 +27,7 @@ pub struct Species {
     /// uncatchable.
     capture_rate: u8,
     /// The forms that belong to this Pokemon.
-    forms: HashMap<StringKey, Arc<Form>>,
+    forms: RwLock<HashMap<StringKey, Arc<Form>>>,
     /// The arbitrary flags that can be set on a Pokemon for script use.
     flags: HashSet<StringKey>,
 }
@@ -44,18 +48,19 @@ impl Species {
         gender_rate: f32,
         growth_rate: &StringKey,
         capture_rate: u8,
-        default_form: Form,
+        default_form: Arc<Form>,
         flags: HashSet<StringKey>,
     ) -> Species {
         let mut forms = HashMap::with_capacity(1);
-        forms.insert_unique_unchecked(get_default_key(), Arc::new(default_form));
+        forms.insert_unique_unchecked(get_default_key(), default_form);
         Species {
+            identifier: Default::default(),
             id,
             name: name.clone(),
             gender_rate,
             growth_rate: growth_rate.clone(),
             capture_rate,
-            forms,
+            forms: RwLock::new(forms),
             flags,
         }
     }
@@ -82,8 +87,8 @@ impl Species {
         self.capture_rate
     }
     /// The forms that belong to this Pokemon.
-    pub fn forms(&self) -> &HashMap<StringKey, Arc<Form>> {
-        &self.forms
+    pub fn forms(&self) -> RwLockReadGuard<'_, RawRwLock, HashMap<StringKey, Arc<Form>>> {
+        self.forms.read()
     }
     /// The arbitrary flags that can be set on a Pokemon for script use.
     pub fn flags(&self) -> &HashSet<StringKey> {
@@ -91,18 +96,18 @@ impl Species {
     }
 
     /// Adds a new form to the species.
-    pub fn add_form(&mut self, id: StringKey, form: Form) {
-        self.forms.insert(id, Arc::new(form));
+    pub fn add_form(&self, id: StringKey, form: Arc<Form>) {
+        self.forms.write().insert(id, form);
     }
 
     /// Gets a form by name.
-    pub fn get_form(&self, id: &StringKey) -> Option<&Arc<Form>> {
-        self.forms.get(id)
+    pub fn get_form(&self, id: &StringKey) -> Option<Arc<Form>> {
+        self.forms.read().get(id).cloned()
     }
 
     /// Gets the form the Pokemon will have by default, if no other form is specified.
-    pub fn get_default_form(&self) -> &Arc<Form> {
-        self.forms.get(&get_default_key()).unwrap()
+    pub fn get_default_form(&self) -> Arc<Form> {
+        self.forms.read().get(&get_default_key()).unwrap().clone()
     }
 
     /// Gets a random gender.
@@ -121,3 +126,9 @@ impl Species {
         self.flags.contains(key)
     }
 }
+
+impl ValueIdentifiable for Species {
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
diff --git a/src/static_data/statistic_set.rs b/src/static_data/statistic_set.rs
index 522f60e..36b1c91 100755
--- a/src/static_data/statistic_set.rs
+++ b/src/static_data/statistic_set.rs
@@ -1,5 +1,6 @@
 use std::sync::atomic::Ordering;
 
+use crate::{ValueIdentifiable, ValueIdentifier};
 use atomig::impls::{PrimitiveAtom, PrimitiveAtomInteger};
 use atomig::{Atom, AtomInteger, Atomic};
 use num_traits::{clamp, NumCast, PrimInt};
@@ -20,6 +21,8 @@ where
     <T as Atom>::Repr: PrimitiveAtomInteger,
     T: AtomInteger,
 {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The health point stat value.
     hp: Atomic<T>,
     /// The physical attack stat value.
@@ -45,6 +48,7 @@ where
     /// Creates a new statistic set with given stats.
     pub fn new(hp: T, attack: T, defense: T, special_attack: T, special_defense: T, speed: T) -> Self {
         Self {
+            identifier: Default::default(),
             hp: Atomic::<T>::new(hp),
             attack: Atomic::<T>::new(attack),
             defense: Atomic::<T>::new(defense),
@@ -128,6 +132,19 @@ where
     }
 }
 
+impl<T> ValueIdentifiable for StatisticSet<T>
+where
+    T: PrimitiveAtom,
+    T: Atom,
+    T: PrimitiveAtomInteger,
+    <T as Atom>::Repr: PrimitiveAtomInteger,
+    T: AtomInteger,
+{
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
+
 /// A collection of statistics that can not be modified after creation.
 ///
 /// As no modifications happen, this struct does not use atomics.
@@ -136,6 +153,8 @@ pub struct StaticStatisticSet<T>
 where
     T: PrimInt,
 {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The health point stat value.
     hp: T,
     /// The physical attack stat value.
@@ -155,8 +174,9 @@ where
     T: PrimInt,
 {
     /// Create a new static statistic set.
-    pub const fn new(hp: T, attack: T, defense: T, special_attack: T, special_defense: T, speed: T) -> Self {
+    pub fn new(hp: T, attack: T, defense: T, special_attack: T, special_defense: T, speed: T) -> Self {
         Self {
+            identifier: Default::default(),
             hp,
             attack,
             defense,
@@ -204,6 +224,15 @@ where
     }
 }
 
+impl<T> ValueIdentifiable for StaticStatisticSet<T>
+where
+    T: PrimInt,
+{
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
+
 /// A clamped statistic set holds the 6 normal stats for a Pokemon, but ensures it always remains
 /// between two values (inclusive on the two values).
 #[derive(Default, Debug)]
@@ -218,6 +247,8 @@ where
     T: NumCast,
     T: PrimInt,
 {
+    /// A unique identifier so we know what value this is.
+    identifier: ValueIdentifier,
     /// The health point stat value.
     hp: Atomic<T>,
     /// The physical attack stat value.
@@ -264,6 +295,7 @@ where
     /// Instantiates a new clamped statistic set.
     pub fn new(hp: T, attack: T, defense: T, special_attack: T, special_defense: T, speed: T) -> Self {
         Self {
+            identifier: Default::default(),
             hp: Self::clamped_cast(hp),
             attack: Self::clamped_cast(attack),
             defense: Self::clamped_cast(defense),
@@ -377,6 +409,21 @@ where
     }
 }
 
+impl<T, const MIN: i64, const MAX: i64> ValueIdentifiable for ClampedStatisticSet<T, MIN, MAX>
+where
+    T: PrimitiveAtom,
+    T: Atom,
+    T: PrimitiveAtomInteger,
+    <T as Atom>::Repr: PrimitiveAtomInteger,
+    T: AtomInteger,
+    T: NumCast,
+    T: PrimInt,
+{
+    fn value_identifier(&self) -> ValueIdentifier {
+        self.identifier
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/src/utils/mod.rs b/src/utils/mod.rs
index 4d9f5d3..ec89cf6 100755
--- a/src/utils/mod.rs
+++ b/src/utils/mod.rs
@@ -2,9 +2,12 @@
 pub use random::Random;
 #[doc(inline)]
 pub use string_key::StringKey;
+#[doc(inline)]
+pub use value_identifier::*;
 
 /// The random module defines a RNG implementation used in pkmn_lib
 mod random;
 /// The string_key module defines a custom string handling for reduced allocations and fast lookups
 /// and equality checks.
 mod string_key;
+mod value_identifier;
diff --git a/src/utils/value_identifier.rs b/src/utils/value_identifier.rs
new file mode 100644
index 0000000..f4efd75
--- /dev/null
+++ b/src/utils/value_identifier.rs
@@ -0,0 +1,22 @@
+use std::sync::atomic::{AtomicUsize, Ordering};
+
+static CURRENT: AtomicUsize = AtomicUsize::new(1);
+
+/// An extremely basic way to identify a piece of data.
+#[derive(Debug, Copy, Clone, Ord, PartialOrd, Eq, PartialEq)]
+#[repr(C)]
+pub struct ValueIdentifier(usize);
+
+impl Default for ValueIdentifier {
+    fn default() -> Self {
+        Self {
+            0: CURRENT.fetch_add(1, Ordering::SeqCst),
+        }
+    }
+}
+
+/// An object with a specific identifier.
+pub trait ValueIdentifiable {
+    /// Get the identifier for the current object.
+    fn value_identifier(&self) -> ValueIdentifier;
+}
diff --git a/tests/common/library_loader.rs b/tests/common/library_loader.rs
index b4de2c6..0f1e8b0 100755
--- a/tests/common/library_loader.rs
+++ b/tests/common/library_loader.rs
@@ -2,6 +2,7 @@ use std::convert::TryFrom;
 use std::fmt::Debug;
 use std::fs::File;
 use std::io::{BufReader, Read};
+use std::sync::Arc;
 
 use hashbrown::HashSet;
 use num_traits::PrimInt;
@@ -116,7 +117,10 @@ pub fn load_items(path: &String, lib: &mut ItemLibrary) {
             }
         }
 
-        lib.add(&name, Item::new(&name, category, battle_category, price as i32, flags));
+        lib.add(
+            &name,
+            Arc::new(Item::new(&name, category, battle_category, price as i32, flags)),
+        );
     }
 }
 
@@ -159,7 +163,7 @@ pub fn load_abilities(path: &String, ability_library: &mut AbilityLibrary) {
             }
         }
 
-        ability_library.add(&name, Ability::new(&name, &effect, parameters));
+        ability_library.add(&name, Arc::new(Ability::new(&name, &effect, parameters)));
     }
 }
 
@@ -212,7 +216,7 @@ pub fn load_moves(path: &String, lib: &mut StaticData) {
 
         lib.moves_mut().add(
             &move_name,
-            MoveData::new(
+            Arc::new(MoveData::new(
                 &move_name.clone(),
                 move_type_id,
                 move_category,
@@ -223,7 +227,7 @@ pub fn load_moves(path: &String, lib: &mut StaticData) {
                 priority,
                 secondary_effect,
                 flags,
-            ),
+            )),
         );
     }
 }
@@ -269,7 +273,7 @@ pub fn load_species(path: &String, library: &mut StaticData) {
             default_form,
             Default::default(),
         );
-        library.species_mut().add(&name, species);
+        library.species_mut().add(&name, Arc::new(species));
     }
 }
 
@@ -282,7 +286,7 @@ fn load_wasm(path: &String, library: &mut WebAssemblyScriptResolver) {
     library.finalize();
 }
 
-fn parse_form(name: StringKey, value: &Value, library: &mut StaticData) -> Form {
+fn parse_form(name: StringKey, value: &Value, library: &mut StaticData) -> Arc<Form> {
     let mut abilities = Vec::new();
     for a in value.get("abilities").unwrap().as_array().unwrap() {
         abilities.push(StringKey::new(a.as_str().unwrap().into()));
@@ -312,7 +316,7 @@ fn parse_form(name: StringKey, value: &Value, library: &mut StaticData) -> Form
 
     let moves = parse_moves(&value.get("moves").unwrap(), library.moves());
 
-    Form::new(
+    Arc::new(Form::new(
         &name,
         height as f32,
         weight as f32,
@@ -323,7 +327,7 @@ fn parse_form(name: StringKey, value: &Value, library: &mut StaticData) -> Form
         hidden_abilities,
         moves,
         Default::default(),
-    )
+    ))
 }
 
 fn parse_statistics<T>(value: &Value) -> StaticStatisticSet<T>
@@ -389,15 +393,15 @@ fn parse_effect_parameter(value: &Value) -> EffectParameter {
         Value::Null => {
             panic!("Unexpected type")
         }
-        Value::Bool(b) => EffectParameter::Bool(*b),
+        Value::Bool(b) => (*b).into(),
         Value::Number(n) => {
             if n.is_f64() {
-                EffectParameter::Float(n.as_f64().unwrap() as f32)
+                (n.as_f64().unwrap() as f32).into()
             } else {
-                EffectParameter::Int(n.as_i64().unwrap())
+                n.as_i64().unwrap().into()
             }
         }
-        Value::String(s) => EffectParameter::String(StringKey::new(s.as_str().into())),
+        Value::String(s) => StringKey::new(s.as_str().into()).into(),
         Value::Array(_) => {
             panic!("Unexpected type")
         }