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Use *NSYNC for POSIX threads locking APIs

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Condition variables, barriers, and r/w locks now work very well.
This commit is contained in:
Justine Tunney 2022-09-11 11:02:07 -07:00
parent 3de35e196c
commit b5cb71ab84
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GPG key ID: BE714B4575D6E328
197 changed files with 3734 additions and 3817 deletions
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18
libc/thread/pthread_barrier_init.c
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@ -16,10 +16,9 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/errno.h"
#include "libc/limits.h"
#include "libc/thread/thread.h"
#include "third_party/nsync/counter.h"
/**
* Initializes barrier.
@ -28,15 +27,14 @@
* @param count is how many threads need to call pthread_barrier_wait()
* before the barrier is released, which must be greater than zero
* @return 0 on success, or error number on failure
* @raise EINVAL if `count` isn't greater than zero or overflows
* @raise EINVAL if `count` isn't greater than zero
* @raise ENOMEM if insufficient memory exists
*/
int pthread_barrier_init(pthread_barrier_t *barrier,
const pthread_barrierattr_t *attr, unsigned count) {
if (count && count < INT_MAX / 2) {
*barrier = (pthread_barrier_t){attr ? *attr : 0, count};
return 0;
} else {
assert(!"bad count");
return EINVAL;
}
nsync_counter c;
if (!count) return EINVAL;
if (!(c = nsync_counter_new(count))) return ENOMEM;
*barrier = (pthread_barrier_t){._nsync = c};
return 0;
}