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Support process shared condition variables

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Justine Tunney 2024-07-22 16:33:23 -07:00
parent 3de6632be6
commit 0a9a6f86bb
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GPG key ID: BE714B4575D6E328
14 changed files with 168 additions and 19 deletions
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19
libc/thread/pthread_cond_destroy.c
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@ -16,8 +16,11 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/errno.h"
#include "libc/intrin/atomic.h"
#include "libc/str/str.h"
#include "libc/thread/thread.h"
#include "third_party/nsync/cv.h"
/**
* Destroys condition.
@ -26,6 +29,22 @@
* @raise EINVAL if threads are still waiting on condition
*/
errno_t pthread_cond_destroy(pthread_cond_t *cond) {
// check if there's active waiters
#if PTHREAD_USE_NSYNC
if (cond->_pshared) {
if (((nsync_cv *)cond)->waiters)
return EINVAL;
} else {
if (atomic_load_explicit(&cond->_waiters, memory_order_relaxed))
return EINVAL;
}
#else
if (atomic_load_explicit(&cond->_waiters, memory_order_relaxed))
return EINVAL;
#endif
// destroy object
memset(cond, -1, sizeof(*cond));
return 0;
}