2022-10-14 14:53:30 +00:00
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/// The foreign function interfaces for the dynamic data
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2022-10-14 08:33:19 +00:00
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mod dynamic_data;
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2022-10-14 14:53:30 +00:00
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/// The foreign function interfaces for that static data
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2022-09-18 16:02:13 +00:00
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mod static_data;
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2022-10-14 14:53:30 +00:00
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/// Helper type for clearer functions.
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2022-09-18 16:02:13 +00:00
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type OwnedPtr<T> = *mut T;
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2022-10-14 14:53:30 +00:00
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/// Helper type for clearer functions.
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2022-09-18 16:02:13 +00:00
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type BorrowedPtr<T> = *const T;
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2022-10-14 14:53:30 +00:00
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/// Generates a basic getter foreign function interface.
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2022-10-08 11:15:04 +00:00
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macro_rules! ffi_arc_getter {
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(
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$type:ty, $func:ident, $returns: ty
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) => {
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paste::paste! {
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#[no_mangle]
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extern "C" fn [< $type:snake _ $func >](ptr: ExternPointer<Arc<$type>>) -> $returns {
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ptr.as_ref().$func()
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}
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}
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};
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}
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2022-10-14 14:53:30 +00:00
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/// Generates a basic getter foreign function interface where the return type is a [`crate::StringKey`].
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2022-10-08 11:15:04 +00:00
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macro_rules! ffi_arc_stringkey_getter {
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2022-09-18 16:02:13 +00:00
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(
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$type:ty, $func:ident
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) => {
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paste::paste! {
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#[no_mangle]
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2022-10-08 11:15:04 +00:00
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extern "C" fn [< $type:lower _ $func >](ptr: ExternPointer<Arc<$type>>) -> OwnedPtr<c_char> {
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2022-09-18 16:02:13 +00:00
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std::ffi::CString::new(ptr.as_ref().$func().str()).unwrap().into_raw()
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}
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}
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};
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}
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2022-10-14 14:53:30 +00:00
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/// Generates a foreign function interface for a vec. This generates a length function, and a getter.
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2022-09-18 16:02:13 +00:00
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macro_rules! ffi_vec_value_getters {
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(
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$type:ty, $func:ident, $returns: ty
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) => {
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paste::paste! {
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#[no_mangle]
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2022-10-08 11:15:04 +00:00
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extern "C" fn [< $type:lower _ $func _length>](ptr: ExternPointer<Arc<$type>>) -> usize {
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2022-09-18 16:02:13 +00:00
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ptr.as_ref().$func().len()
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}
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#[no_mangle]
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2022-10-08 11:15:04 +00:00
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extern "C" fn [< $type:lower _ $func _get>](ptr: ExternPointer<Arc<$type>>, index: usize) -> $returns {
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2022-09-18 16:02:13 +00:00
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*ptr.as_ref().$func().get(index).unwrap()
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}
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}
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};
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}
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2022-10-14 14:53:30 +00:00
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/// Generates a foreign function interface for a vec of [`crate::StringKey`]. This generates a
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/// length function, and a getter.
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2022-09-18 16:02:13 +00:00
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macro_rules! ffi_vec_stringkey_getters {
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(
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$type:ident, $func:ident
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) => {
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paste::paste! {
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#[no_mangle]
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2022-10-08 11:15:04 +00:00
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extern "C" fn [< $type:lower _ $func _length>](ptr: ExternPointer<Arc<$type>>) -> usize {
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2022-09-18 16:02:13 +00:00
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ptr.as_ref().$func().len()
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}
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#[no_mangle]
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2022-10-08 11:15:04 +00:00
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extern "C" fn [< $type:lower _ $func _get>](ptr: ExternPointer<Arc<$type>>, index: usize) -> OwnedPtr<c_char> {
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2022-09-18 16:02:13 +00:00
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CString::new(ptr.as_ref().$func().get(index).unwrap().str()).unwrap().into_raw()
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}
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}
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};
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}
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2022-10-08 11:15:04 +00:00
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use crate::{ValueIdentifiable, ValueIdentifier};
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pub(self) use ffi_arc_getter;
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pub(self) use ffi_arc_stringkey_getter;
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2022-09-18 16:02:13 +00:00
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pub(self) use ffi_vec_stringkey_getters;
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pub(self) use ffi_vec_value_getters;
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2022-10-14 14:53:30 +00:00
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use std::mem::transmute;
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2022-10-08 11:15:04 +00:00
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use std::sync::Arc;
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2022-09-18 16:02:13 +00:00
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2022-10-14 14:53:30 +00:00
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/// Helper utility class to wrap a pointer for extern functions.
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2022-09-18 16:02:13 +00:00
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#[repr(C)]
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pub(self) struct ExternPointer<T: ?Sized> {
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2022-10-14 14:53:30 +00:00
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/// The wrapped pointer.
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2022-09-18 16:02:13 +00:00
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ptr: *mut T,
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}
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impl<T: ?Sized> ExternPointer<T> {
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2022-10-14 14:53:30 +00:00
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/// Get the internal pointer as reference.
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2022-09-18 16:02:13 +00:00
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pub(self) fn as_ref(&self) -> &T {
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unsafe {
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2022-10-14 14:53:30 +00:00
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self.ptr
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.as_ref()
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.unwrap_or_else(|| panic!("Given pointer of type '{}' was null", std::any::type_name::<T>()))
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2022-09-18 16:02:13 +00:00
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}
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}
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2022-10-14 14:53:30 +00:00
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/// Get the internal pointer as mutable reference.
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pub(self) fn as_mut(&mut self) -> &mut T {
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2022-09-18 16:02:13 +00:00
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unsafe {
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2022-10-14 14:53:30 +00:00
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self.ptr
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.as_mut()
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.unwrap_or_else(|| panic!("Given pointer of type '{}' was null", std::any::type_name::<T>()))
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2022-09-18 16:02:13 +00:00
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}
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}
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}
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2022-10-14 14:53:30 +00:00
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/// Helper utility class to give both the pointer and identifier to a FFI.
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2022-10-08 11:15:04 +00:00
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#[repr(C)]
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pub(self) struct IdentifiablePointer<T> {
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2022-10-14 14:53:30 +00:00
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/// The wrapped pointer.
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2022-10-08 11:15:04 +00:00
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pub ptr: *const T,
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2022-10-14 14:53:30 +00:00
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/// The identifier of the pointer.
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pub id: usize,
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2022-10-08 11:15:04 +00:00
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}
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2022-10-14 08:33:19 +00:00
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impl<T> IdentifiablePointer<T> {
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2022-10-14 14:53:30 +00:00
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/// Creates a new IdentifiablePointer.
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2022-10-14 08:33:19 +00:00
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pub(self) fn new(ptr: *const T, id: ValueIdentifier) -> Self {
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2022-10-14 14:53:30 +00:00
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unsafe { Self { ptr, id: transmute(id) } }
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2022-10-14 08:33:19 +00:00
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}
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}
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2022-10-14 14:53:30 +00:00
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impl<T> From<*mut T> for ExternPointer<T> {
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fn from(ptr: *mut T) -> Self {
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ExternPointer { ptr }
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2022-10-14 11:59:04 +00:00
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}
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}
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2022-10-08 11:15:04 +00:00
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impl<T: ValueIdentifiable> From<Arc<T>> for IdentifiablePointer<Arc<T>> {
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fn from(v: Arc<T>) -> Self {
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2022-10-14 14:53:30 +00:00
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let id = unsafe { transmute(v.value_identifier()) };
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2022-10-08 11:15:04 +00:00
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Self {
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ptr: Box::into_raw(Box::new(v)),
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id,
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}
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}
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}
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2022-11-26 10:25:56 +00:00
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impl<T: ValueIdentifiable> From<Option<Arc<T>>> for IdentifiablePointer<Arc<T>> {
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fn from(v: Option<Arc<T>>) -> Self {
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if let Some(v) = v {
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let id = unsafe { transmute(v.value_identifier()) };
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Self {
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ptr: Box::into_raw(Box::new(v)),
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id,
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}
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} else {
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IdentifiablePointer::none()
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}
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}
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}
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2022-10-08 11:15:04 +00:00
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impl<T: ValueIdentifiable> From<Box<T>> for IdentifiablePointer<T> {
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fn from(v: Box<T>) -> Self {
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2022-10-14 14:53:30 +00:00
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let id = unsafe { transmute(v.value_identifier()) };
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2022-10-08 11:15:04 +00:00
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Self {
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ptr: Box::into_raw(v),
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id,
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}
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}
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}
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impl<T: ValueIdentifiable> From<*const T> for IdentifiablePointer<T> {
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fn from(v: *const T) -> Self {
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2022-10-14 14:53:30 +00:00
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let id = unsafe { transmute(v.as_ref().unwrap().value_identifier()) };
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2022-10-08 11:15:04 +00:00
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Self { ptr: v, id }
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}
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}
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impl<T> IdentifiablePointer<T> {
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2022-10-14 14:53:30 +00:00
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/// Returns an identifiable pointer with null as pointer, and 0 as identifier.
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2022-10-08 11:15:04 +00:00
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pub fn none() -> Self {
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Self {
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ptr: std::ptr::null(),
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id: Default::default(),
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}
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}
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}
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