Use futex-based thread-parker for Wasm32.
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@ -0,0 +1,17 @@
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use crate::arch::wasm32;
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use crate::convert::TryInto;
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use crate::sync::atomic::AtomicI32;
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use crate::time::Duration;
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pub fn futex_wait(futex: &AtomicI32, expected: i32, timeout: Option<Duration>) {
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let timeout = timeout.and_then(|t| t.as_nanos().try_into().ok()).unwrap_or(-1);
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unsafe {
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wasm32::memory_atomic_wait32(futex as *const AtomicI32 as *mut i32, expected, timeout);
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}
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}
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pub fn futex_wake(futex: &AtomicI32) {
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unsafe {
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wasm32::memory_atomic_notify(futex as *const AtomicI32 as *mut i32, 1);
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}
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}
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@ -55,6 +55,8 @@ cfg_if::cfg_if! {
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pub mod mutex;
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pub mod mutex;
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#[path = "rwlock_atomics.rs"]
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#[path = "rwlock_atomics.rs"]
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pub mod rwlock;
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pub mod rwlock;
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#[path = "futex_atomics.rs"]
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pub mod futex;
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} else {
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} else {
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#[path = "../unsupported/condvar.rs"]
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#[path = "../unsupported/condvar.rs"]
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pub mod condvar;
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pub mod condvar;
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@ -1,5 +1,9 @@
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cfg_if::cfg_if! {
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cfg_if::cfg_if! {
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if #[cfg(any(target_os = "linux", target_os = "android"))] {
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if #[cfg(any(
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target_os = "linux",
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target_os = "android",
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all(target_arch = "wasm32", target_feature = "atomics"),
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))] {
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mod futex;
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mod futex;
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pub use futex::Parker;
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pub use futex::Parker;
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} else {
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} else {
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