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//+private
//+build wasm32, wasm64p32
package sync
import "base:intrinsics"
import "core:time"
// NOTE: because `core:sync` is in the dependency chain of a lot of the core packages (mostly through `core:mem`)
// without actually calling into it much, I opted for a runtime panic instead of a compile error here.
_futex_wait :: proc "contextless" (f: ^Futex, expected: u32) -> bool {
when !intrinsics.has_target_feature("atomics") {
_panic("usage of `core:sync` requires the `-target-feature:\"atomics\"` or a `-microarch` that supports it")
} else {
s := intrinsics.wasm_memory_atomic_wait32((^u32)(f), expected, -1)
return s != 0
}
}
_futex_wait_with_timeout :: proc "contextless" (f: ^Futex, expected: u32, duration: time.Duration) -> bool {
when !intrinsics.has_target_feature("atomics") {
_panic("usage of `core:sync` requires the `-target-feature:\"atomics\"` or a `-microarch` that supports it")
} else {
s := intrinsics.wasm_memory_atomic_wait32((^u32)(f), expected, i64(duration))
return s != 0
}
}
_futex_signal :: proc "contextless" (f: ^Futex) {
when !intrinsics.has_target_feature("atomics") {
_panic("usage of `core:sync` requires the `-target-feature:\"atomics\"` or a `-microarch` that supports it")
} else {
loop: for {
s := intrinsics.wasm_memory_atomic_notify32((^u32)(f), 1)
if s >= 1 {
return
}
}
}
}
_futex_broadcast :: proc "contextless" (f: ^Futex) {
when !intrinsics.has_target_feature("atomics") {
_panic("usage of `core:sync` requires the `-target-feature:\"atomics\"` or a `-microarch` that supports it")
} else {
loop: for {
s := intrinsics.wasm_memory_atomic_notify32((^u32)(f), ~u32(0))
if s >= 0 {
return
}
}
}
}
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