projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| a334319f UD |
1 | /* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2002, 2003 |
| 2 | Free Software Foundation, Inc. | |
| 84384f5b | 3 | This file is part of the GNU C Library. |
| 1177c8ba | 4 | |
| 84384f5b | 5 | The GNU C Library is free software; you can redistribute it and/or |
| 41bdb6e2 AJ |
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. | |
| 1177c8ba | 9 | |
| 84384f5b UD |
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 | |
| 41bdb6e2 | 13 | Lesser General Public License for more details. |
| 1177c8ba | 14 | |
| 41bdb6e2 AJ |
15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, write to the Free | |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 18 | 02111-1307 USA. */ | |
| 1177c8ba | 19 | |
| cbdee279 | 20 | #include <errno.h> |
| 1177c8ba | 21 | #include <signal.h> |
| 1177c8ba RM |
22 | #include <unistd.h> |
| 23 | ||
| 6ee8d334 | 24 | #include <sysdep-cancel.h> |
| 0dee6738 | 25 | #include <sys/syscall.h> |
| 4bbb61e4 | 26 | #include <bp-checks.h> |
| 0dee6738 | 27 | |
| a334319f | 28 | #include "kernel-features.h" |
| 958f238f | 29 | |
| cbdee279 | 30 | |
| 6ee8d334 | 31 | #if !__ASSUME_REALTIME_SIGNALS |
| cbdee279 | 32 | /* The variable is shared between all wrappers around signal handling |
| 7804eb37 UD |
33 | functions which have RT equivalents. The definition is in sigaction.c. */ |
| 34 | extern int __libc_missing_rt_sigs; | |
| cbdee279 | 35 | |
| 1177c8ba | 36 | |
| 6ee8d334 UD |
37 | static int |
| 38 | do_sigsuspend (const sigset_t *set) | |
| 1177c8ba | 39 | { |
| 958f238f | 40 | # ifdef __NR_rt_sigsuspend |
| cbdee279 | 41 | /* First try the RT signals. */ |
| da2d1bc5 | 42 | if (!__libc_missing_rt_sigs) |
| cbdee279 UD |
43 | { |
| 44 | /* XXX The size argument hopefully will have to be changed to the | |
| 45 | real size of the user-level sigset_t. */ | |
| 8fb3e007 | 46 | int saved_errno = errno; |
| 4bbb61e4 GM |
47 | int result = INLINE_SYSCALL (rt_sigsuspend, 2, |
| 48 | CHECK_SIGSET (set), _NSIG / 8); | |
| cbdee279 UD |
49 | if (result >= 0 || errno != ENOSYS) |
| 50 | return result; | |
| 51 | ||
| 8fb3e007 | 52 | __set_errno (saved_errno); |
| da2d1bc5 | 53 | __libc_missing_rt_sigs = 1; |
| cbdee279 | 54 | } |
| 958f238f | 55 | # endif |
| df4ef2ab | 56 | |
| 0dee6738 | 57 | return INLINE_SYSCALL (sigsuspend, 3, 0, 0, set->__val[0]); |
| 6ee8d334 UD |
58 | } |
| 59 | #endif | |
| 60 | ||
| 61 | /* Change the set of blocked signals to SET, | |
| 62 | wait until a signal arrives, and restore the set of blocked signals. */ | |
| 63 | int | |
| 64 | __sigsuspend (set) | |
| 65 | const sigset_t *set; | |
| 66 | { | |
| a334319f UD |
67 | #if __ASSUME_REALTIME_SIGNALS |
| 68 | if (SINGLE_THREAD_P) | |
| 69 | return INLINE_SYSCALL (rt_sigsuspend, 2, CHECK_SIGSET (set), _NSIG / 8); | |
| 70 | ||
| 71 | int oldtype = LIBC_CANCEL_ASYNC (); | |
| 72 | ||
| 73 | int result = INLINE_SYSCALL (rt_sigsuspend, 2, CHECK_SIGSET (set), | |
| 74 | _NSIG / 8); | |
| 75 | ||
| 76 | LIBC_CANCEL_RESET (oldtype); | |
| 77 | ||
| 78 | return result; | |
| 79 | #else | |
| 6ee8d334 UD |
80 | if (SINGLE_THREAD_P) |
| 81 | return do_sigsuspend (set); | |
| 82 | ||
| 83 | int oldtype = LIBC_CANCEL_ASYNC (); | |
| 84 | ||
| 85 | int result = do_sigsuspend (set); | |
| 86 | ||
| 87 | LIBC_CANCEL_RESET (oldtype); | |
| 88 | ||
| 89 | return result; | |
| a334319f | 90 | #endif |
| 1177c8ba | 91 | } |
| 37ba7d66 | 92 | libc_hidden_def (__sigsuspend) |
| 84384f5b | 93 | weak_alias (__sigsuspend, sigsuspend) |
| e5e45b53 | 94 | strong_alias (__sigsuspend, __libc_sigsuspend) |