| /* pause -- suspend the process until a signal arrives. POSIX.1 version. |
| Copyright (C) 2003-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <signal.h> |
| #include <unistd.h> |
| #include <sysdep-cancel.h> |
| |
| /* Suspend the process until a signal arrives. |
| This always returns -1 and sets errno to EINTR. */ |
| |
| int |
| __libc_pause (void) |
| { |
| sigset_t set; |
| |
| __sigemptyset (&set); |
| __sigprocmask (SIG_BLOCK, NULL, &set); |
| |
| /* pause is a cancellation point, but so is sigsuspend. |
| So no need for anything special here. */ |
| |
| return __sigsuspend (&set); |
| } |
| weak_alias (__libc_pause, pause) |
| |
| LIBC_CANCEL_HANDLED (); /* sigsuspend handles our cancellation. */ |
| |
| #ifndef NO_CANCELLATION |
| # include <not-cancel.h> |
| |
| int |
| __pause_nocancel (void) |
| { |
| sigset_t set; |
| |
| __sigemptyset (&set); |
| __sigprocmask (SIG_BLOCK, NULL, &set); |
| |
| return sigsuspend_not_cancel (&set); |
| } |
| #endif |
