DISPATCH_NOINLINE
void
_dispatch_source_xref_release(dispatch_source_t ds)
{
#ifndef DISPATCH_NO_LEGACY
if (ds->ds_is_legacy) {
if (!(ds->ds_timer.flags & DISPATCH_TIMER_TYPE_MASK == DISPATCH_TIMER_ONESHOT)) {
dispatch_source_cancel(ds);
}
// Clients often leave sources suspended at the last release
dispatch_atomic_and(&ds->do_suspend_cnt, DISPATCH_OBJECT_SUSPEND_LOCK);
} else
#endif
if (slowpath(DISPATCH_OBJECT_SUSPENDED(ds))) {
// Arguments for and against this assert are within 6705399
DISPATCH_CLIENT_CRASH("Release of a suspended object");
}
_dispatch_wakeup(as_do(ds));
_dispatch_release(as_do(ds));
}
// Return true if this bit was the last in the bitmap, and it is now all zeroes
DISPATCH_ALWAYS_INLINE_NDEBUG
static bool
bitmap_clear_bit(volatile bitmap_t *bitmap, unsigned int index,
bool exclusively)
{
#if DISPATCH_DEBUG
dispatch_assert(index < CONTINUATIONS_PER_BITMAP);
#endif
const bitmap_t mask = BITMAP_C(1) << index;
bitmap_t b;
if (exclusively == CLEAR_EXCLUSIVELY) {
if (slowpath((*bitmap & mask) == 0)) {
DISPATCH_CRASH("Corruption: failed to clear bit exclusively");
}
}
// and-and-fetch
b = dispatch_atomic_and(bitmap, ~mask, release);
return b == 0;
}
