src/thread/pthread_kill.c

   1 #include "pthread_impl.h"
   2 #include "lock.h"
   3
   4 int pthread_kill(pthread_t t, int sig)
   5 {
   6         int r;
   7         sigset_t set;
   8         /* Block not just app signals, but internal ones too, since
   9          * pthread_kill is used to implement pthread_cancel, which
  10          * must be async-cancel-safe. */
  11         __block_all_sigs(&set);
  12         LOCK(t->killlock);
  13         r = t->tid ? -__syscall(SYS_tkill, t->tid, sig)
  14                 : (sig+0U >= _NSIG ? EINVAL : 0);
  15         UNLOCK(t->killlock);
  16         __restore_sigs(&set);
  17         return r;
  18 }