nptl/pthread_sigmask.c

   1 /* Examine and change blocked signals for a thread.  Generic POSIX version.
   2    Copyright (C) 2014-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <signal.h>
  21 #include <pthreadP.h>
  22
  23 #if defined SIGCANCEL || defined SIGTIMER || defined SIGSETXID
  24 # error "This implementation assumes no internal-only signal numbers."
  25 #endif
  26
  27 int
  28 pthread_sigmask (int how, const sigset_t *newmask, sigset_t *oldmask)
  29 {
  30   /* Here we assume that sigprocmask actually does everything right.
  31      The only difference is the return value protocol.  */
  32   int result = sigprocmask (how, newmask, oldmask);
  33   if (result < 0)
  34     result = errno;
  35   return result;
  36 }