1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
| | #include <threads.h>
#include <errno.h>
int __pthread_mutex_timedlock(mtx_t *restrict m, const struct timespec *restrict ts);
int mtx_timedlock(mtx_t *restrict mutex, const struct timespec *restrict ts) {
int ret = __pthread_mutex_timedlock(mutex, ts);
switch (ret) {
/* May also return EINVAL or EAGAIN. EAGAIN is
specially tricky since C11 doesn't define how many recursive
calls can be done. (this *isn't* the maximum amount of nested
calls!) This implementation here deals this with a counter and
detects overflow, so this is definitively UB. */
default: return thrd_error;
case 0: return thrd_success;
case ETIMEDOUT: return thrd_timedout;
}
}
|