src/system/libroot/posix/signal/sigtimedwait.cpp

   1 /*
   2  * Copyright 2011, Ingo Weinhold, ingo_weinhold@gmx.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6
   7 #include <signal.h>
   8
   9 #include <errno.h>
  10 #include <pthread.h>
  11
  12 #include <syscall_utils.h>
  13
  14 #include <errno_private.h>
  15 #include <syscalls.h>
  16
  17
  18 int
  19 sigtimedwait(const sigset_t* set, siginfo_t* info,
  20         const struct timespec* timeout)
  21 {
  22         // make info non-NULL to simplify things
  23         siginfo_t stackInfo;
  24         if (info == NULL)
  25                 info = &stackInfo;
  26
  27         // translate the timeout
  28         uint32 flags;
  29     bigtime_t timeoutMicros;
  30         if (timeout != NULL) {
  31                 timeoutMicros = system_time();
  32                 flags = B_ABSOLUTE_TIMEOUT;
  33             timeoutMicros += (bigtime_t)timeout->tv_sec * 1000000
  34                 + timeout->tv_nsec / 1000;
  35         } else {
  36                 flags = 0;
  37                 timeoutMicros = 0;
  38         }
  39
  40         status_t error = _kern_sigwait(set, info, flags, timeoutMicros);
  41
  42         pthread_testcancel();
  43
  44         if (error != B_OK)
  45                 RETURN_AND_SET_ERRNO(error);
  46
  47         return info->si_signo;
  48 }