| /* Copyright (C) 2011-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. |
| |
| 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. */ |
| |
| static int |
| __syscall_pause (void) |
| { |
| sigset_t set; |
| |
| int rc = |
| INLINE_SYSCALL (rt_sigprocmask, 4, SIG_BLOCK, NULL, &set, _NSIG / 8); |
| if (rc == 0) |
| rc = INLINE_SYSCALL (rt_sigsuspend, 2, &set, _NSIG / 8); |
| |
| return rc; |
| } |
| |
| int |
| __libc_pause (void) |
| { |
| if (SINGLE_THREAD_P) |
| return __syscall_pause (); |
| |
| int oldtype = LIBC_CANCEL_ASYNC (); |
| |
| int result = __syscall_pause (); |
| |
| LIBC_CANCEL_RESET (oldtype); |
| |
| return result; |
| } |
| weak_alias (__libc_pause, pause) |
| |
| #ifndef NO_CANCELLATION |
| # include <not-cancel.h> |
| |
| int |
| __pause_nocancel (void) |
| { |
| return __syscall_pause (); |
| } |
| #endif |
