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| -rw-r--r-- | core/sync/extended.odin | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/core/sync/extended.odin b/core/sync/extended.odin index c76ab504b..76b7686fe 100644 --- a/core/sync/extended.odin +++ b/core/sync/extended.odin @@ -417,4 +417,28 @@ unpark :: proc "contextless" (p: ^Parker) { if atomic_exchange_explicit(&p.state, NOTIFIED, .Release) == PARKED { futex_signal(&p.state) } +} + + + +// A One_Shot_Event is an associated token which is initially not present: +// * The `one_shot_event_wait` blocks the current thread until the event +// is made available +// * The `one_shot_event_signal` procedure automatically makes the token +// available if its was not already. +One_Shot_Event :: struct #no_copy { + state: Futex, +} + +// Blocks the current thread until the event is made available with `one_shot_event_signal`. +one_shot_event_wait :: proc "contextless" (e: ^One_Shot_Event) { + for atomic_load_explicit(&e.state, .Acquire) == 0 { + futex_wait(&e.state, 1) + } +} + +// Releases any threads that are currently blocked by this event with `one_shot_event_wait`. +one_shot_event_signal :: proc "contextless" (e: ^One_Shot_Event) { + atomic_store_explicit(&e.state, 1, .Release) + futex_broadcast(&e.state) }
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