src/thread/pthread_join.c

   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);