github.com/afumu/libc@v0.0.6/musl/src/thread/pthread_join.c (about)

     1  #define _GNU_SOURCE
     2  #include "pthread_impl.h"
     3  #include <sys/mman.h>
     4  
     5  static void dummy1(pthread_t t)
     6  {
     7  }
     8  weak_alias(dummy1, __tl_sync);
     9  
    10  static int __pthread_timedjoin_np(pthread_t t, void **res, const struct timespec *at)
    11  {
    12  	int state, cs, r = 0;
    13  	__pthread_testcancel();
    14  	__pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
    15  	if (cs == PTHREAD_CANCEL_ENABLE) __pthread_setcancelstate(cs, 0);
    16  	while ((state = t->detach_state) && r != ETIMEDOUT && r != EINVAL) {
    17  		if (state >= DT_DETACHED) a_crash();
    18  		r = __timedwait_cp(&t->detach_state, state, CLOCK_REALTIME, at, 1);
    19  	}
    20  	__pthread_setcancelstate(cs, 0);
    21  	if (r == ETIMEDOUT || r == EINVAL) return r;
    22  	__tl_sync(t);
    23  	if (res) *res = t->result;
    24  	if (t->map_base) __munmap(t->map_base, t->map_size);
    25  	return 0;
    26  }
    27  
    28  int __pthread_join(pthread_t t, void **res)
    29  {
    30  	return __pthread_timedjoin_np(t, res, 0);
    31  }
    32  
    33  static int __pthread_tryjoin_np(pthread_t t, void **res)
    34  {
    35  	return t->detach_state==DT_JOINABLE ? EBUSY : __pthread_join(t, res);
    36  }
    37  
    38  weak_alias(__pthread_tryjoin_np, pthread_tryjoin_np);
    39  weak_alias(__pthread_timedjoin_np, pthread_timedjoin_np);
    40  weak_alias(__pthread_join, pthread_join);