39 lines
1.1 KiB
Rust
39 lines
1.1 KiB
Rust
use crate::dynamic_data::Event;
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/// Wrapper class for easier use of an external function pointer.
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#[repr(C)]
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pub(super) struct NativeEventHook {
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/// The actual C function to be called.
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f: extern "C" fn(*const Event<'_>),
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}
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impl NativeEventHook {
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/// Calls the actual wrapped function in the correct format.
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fn call_self(&self, b: &&Event<'_>) {
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(self.f)(*b as *const Event)
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}
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}
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/// A tuple with the arguments of the event hook function
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type EventHookArgs<'a, 'b, 'c> = (&'a Box<&'b Event<'c>>,);
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impl FnMut<EventHookArgs<'_, '_, '_>> for NativeEventHook {
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extern "rust-call" fn call_mut(&mut self, args: EventHookArgs<'_, '_, '_>) -> Self::Output {
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self.call_self(args.0)
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}
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}
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impl FnOnce<EventHookArgs<'_, '_, '_>> for NativeEventHook {
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type Output = ();
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extern "rust-call" fn call_once(self, args: EventHookArgs<'_, '_, '_>) -> Self::Output {
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self.call_self(args.0)
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}
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}
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impl Fn<EventHookArgs<'_, '_, '_>> for NativeEventHook {
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extern "rust-call" fn call(&self, args: EventHookArgs<'_, '_, '_>) -> Self::Output {
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self.call_self(args.0)
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}
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}
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