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Flush libuv events before run loop sleeps #10

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Merged
kasperisager merged 1 commit into from
Sep 20, 2026
Merged

Flush libuv events before run loop sleeps #10

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26 changes: 26 additions & 0 deletions lib/runtime.m
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Original file line number Diff line number Diff line change
Expand Up @@ -21,8 +21,10 @@

static dispatch_source_t bare__poll;
static dispatch_source_t bare__timer;
static CFRunLoopObserverRef bare__observer;

static bool bare__exited;
static bool bare__running;

static void
bare__on_shutdown(uv_async_t *handle) {
Expand Down Expand Up @@ -62,9 +64,15 @@
bare__run(void) {
int err;

if (bare__running) return;

bare__running = true;

err = bare_run(bare, UV_RUN_NOWAIT);
assert(err >= 0);

bare__running = false;

if (bare__exited) return;

int timeout = uv_backend_timeout(bare__loop);
Expand Down Expand Up @@ -135,13 +143,31 @@
dispatch_resume(bare__poll);
dispatch_resume(bare__timer);

bare__observer = CFRunLoopObserverCreateWithHandler(
NULL,
kCFRunLoopBeforeWaiting,
true,
0,
^(CFRunLoopObserverRef observer, CFRunLoopActivity activity) {
if (bare__exited) return;

bare__run();
}
);

CFRunLoopAddObserver(CFRunLoopGetMain(), bare__observer, kCFRunLoopCommonModes);

bare__run();
}

static void
bare__terminate(void) {
int err;

CFRunLoopRemoveObserver(CFRunLoopGetMain(), bare__observer, kCFRunLoopCommonModes);

CFRelease(bare__observer);

dispatch_source_cancel(bare__poll);
dispatch_source_cancel(bare__timer);

Expand Down
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