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Fix deadlock on sending to full, buffered, closed Chan

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This will also keep messages from being sent to closed, buffered
channels in general.
This commit is contained in:
Feoramund
2024-09-10 14:52:20 -04:00
parent 73f5ab473c
commit 026aef69e3
1 changed files with 6 additions and 1 deletions
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core/sync/chan/chan.odin
+6 -1
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@@ -164,12 +164,17 @@ send_raw :: proc "contextless" (c: ^Raw_Chan, msg_in: rawptr) -> (ok: bool) {
} }
if c.queue != nil { // buffered if c.queue != nil { // buffered
sync.guard(&c.mutex) sync.guard(&c.mutex)
for c.queue.len == c.queue.cap { for !sync.atomic_load(&c.closed) &&
c.queue.len == c.queue.cap {
sync.atomic_add(&c.w_waiting, 1) sync.atomic_add(&c.w_waiting, 1)
sync.wait(&c.w_cond, &c.mutex) sync.wait(&c.w_cond, &c.mutex)
sync.atomic_sub(&c.w_waiting, 1) sync.atomic_sub(&c.w_waiting, 1)
} }
if sync.atomic_load(&c.closed) {
return false
}
ok = raw_queue_push(c.queue, msg_in) ok = raw_queue_push(c.queue, msg_in)
if sync.atomic_load(&c.r_waiting) > 0 { if sync.atomic_load(&c.r_waiting) > 0 {
sync.signal(&c.r_cond) sync.signal(&c.r_cond)