getopt: fix null pointer arithmetic ub
[musl] / src / thread / mtx_trylock.c
1 #include "pthread_impl.h"
2 #include <threads.h>
3
4 int mtx_trylock(mtx_t *m)
5 {
6         if (m->_m_type == PTHREAD_MUTEX_NORMAL)
7                 return (a_cas(&m->_m_lock, 0, EBUSY) & EBUSY) ? thrd_busy : thrd_success;
8
9         int ret = __pthread_mutex_trylock((pthread_mutex_t *)m);
10         switch (ret) {
11         default:    return thrd_error;
12         case 0:     return thrd_success;
13         case EBUSY: return thrd_busy;
14         }
15 }