projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| d4697bc9 | 1 | /* Copyright (C) 2011-2014 Free Software Foundation, Inc. |
| a63c7fa1 CM |
2 | This file is part of the GNU C Library. |
| 3 | Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. | |
| 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 | |
| ab84e3ff PE |
16 | License along with the GNU C Library. If not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| a63c7fa1 CM |
18 | |
| 19 | #include <signal.h> | |
| 20 | #include <unistd.h> | |
| 21 | #include <sysdep-cancel.h> | |
| 22 | ||
| 23 | /* Suspend the process until a signal arrives. | |
| 24 | This always returns -1 and sets errno to EINTR. */ | |
| 25 | ||
| 26 | static int | |
| 27 | __syscall_pause (void) | |
| 28 | { | |
| 29 | sigset_t set; | |
| 30 | ||
| 31 | int rc = | |
| 32 | INLINE_SYSCALL (rt_sigprocmask, 4, SIG_BLOCK, NULL, &set, _NSIG / 8); | |
| 33 | if (rc == 0) | |
| 34 | rc = INLINE_SYSCALL (rt_sigsuspend, 2, &set, _NSIG / 8); | |
| 35 | ||
| 36 | return rc; | |
| 37 | } | |
| 38 | ||
| 39 | int | |
| 40 | __libc_pause (void) | |
| 41 | { | |
| 42 | if (SINGLE_THREAD_P) | |
| 43 | return __syscall_pause (); | |
| 44 | ||
| 45 | int oldtype = LIBC_CANCEL_ASYNC (); | |
| 46 | ||
| 47 | int result = __syscall_pause (); | |
| 48 | ||
| 49 | LIBC_CANCEL_RESET (oldtype); | |
| 50 | ||
| 51 | return result; | |
| 52 | } | |
| 53 | weak_alias (__libc_pause, pause) | |
| 54 | ||
| 55 | #ifndef NO_CANCELLATION | |
| 56 | # include <not-cancel.h> | |
| 57 | ||
| 58 | int | |
| 59 | __pause_nocancel (void) | |
| 60 | { | |
| 61 | return __syscall_pause (); | |
| 62 | } | |
| 63 | #endif |