src/thread/pthread_join.c

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