src/thread/pthread_join.c

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