add missing memory barrier to pthread_join
[musl] / src / thread / pthread_join.c
1 #include "pthread_impl.h"
2 #include <sys/mman.h>
3
4 int __munmap(void *, size_t);
5 void __pthread_testcancel(void);
6 int __pthread_setcancelstate(int, int *);
7
8 int __pthread_join(pthread_t t, void **res)
9 {
10         int tmp, cs;
11         __pthread_testcancel();
12         __pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
13         if (cs == PTHREAD_CANCEL_ENABLE) __pthread_setcancelstate(cs, 0);
14         while ((tmp = t->tid)) __timedwait_cp(&t->tid, tmp, 0, 0, 0);
15         __pthread_setcancelstate(cs, 0);
16         a_barrier();
17         if (res) *res = t->result;
18         if (t->map_base) __munmap(t->map_base, t->map_size);
19         return 0;
20 }
21
22 weak_alias(__pthread_join, pthread_join);