leyoda/winit
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Allow recreating wasm event loop with spawn (#2897)

Browse source
This commit is contained in:
Josh Groves 2023-06-23 15:01:42 -02:30 • committed by GitHub
parent 864a1d5924
commit bc216b8f67
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
4 changed files with 29 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

13
src/event_loop.rs
View file

@ -9,9 +9,9 @@
//! handle events.
use std::marker::PhantomData;
use std::ops::Deref;
use std::sync::atomic::{AtomicBool, Ordering};
use std::{error, fmt};
use once_cell::sync::OnceCell;
use raw_window_handle::{HasRawDisplayHandle, RawDisplayHandle};
#[cfg(not(wasm_platform))]
use std::time::{Duration, Instant};
@ -69,6 +69,8 @@ impl EventLoopBuilder<()> {
}
}
static EVENT_LOOP_CREATED: AtomicBool = AtomicBool::new(false);
impl<T> EventLoopBuilder<T> {
/// Start building a new event loop, with the given type as the user event
/// type.
@ -114,10 +116,10 @@ impl<T> EventLoopBuilder<T> {
)]
#[inline]
pub fn build(&mut self) -> EventLoop<T> {
static EVENT_LOOP_CREATED: OnceCell<()> = OnceCell::new();
if EVENT_LOOP_CREATED.set(()).is_err() {
if EVENT_LOOP_CREATED.swap(true, Ordering::Relaxed) {
panic!("Creating EventLoop multiple times is not supported.");
}
// Certain platforms accept a mutable reference in their API.
#[allow(clippy::unnecessary_mut_passed)]
EventLoop {
@ -125,6 +127,11 @@ impl<T> EventLoopBuilder<T> {
_marker: PhantomData,
}
}
#[cfg(wasm_platform)]
pub(crate) fn allow_event_loop_recreation() {
EVENT_LOOP_CREATED.store(false, Ordering::Relaxed);
}
}
impl<T> fmt::Debug for EventLoop<T> {