| /* Copyright (C) 1997,1998,2000,2002-2004,2005 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <errno.h> |
| #include <signal.h> |
| #define __need_NULL |
| #include <stddef.h> |
| #include <string.h> |
| |
| #include <sysdep-cancel.h> |
| #include <sys/syscall.h> |
| #include <bp-checks.h> |
| |
| #ifdef __NR_rt_sigtimedwait |
| |
| /* Return any pending signal or wait for one for the given time. */ |
| static int |
| do_sigwait (const sigset_t *set, int *sig) |
| { |
| int ret; |
| |
| #ifdef SIGCANCEL |
| sigset_t tmpset; |
| if (set != NULL |
| && (__builtin_expect (__sigismember (set, SIGCANCEL), 0) |
| # ifdef SIGSETXID |
| || __builtin_expect (__sigismember (set, SIGSETXID), 0) |
| # endif |
| )) |
| { |
| /* Create a temporary mask without the bit for SIGCANCEL set. */ |
| // We are not copying more than we have to. |
| memcpy (&tmpset, set, _NSIG / 8); |
| __sigdelset (&tmpset, SIGCANCEL); |
| # ifdef SIGSETXID |
| __sigdelset (&tmpset, SIGSETXID); |
| # endif |
| set = &tmpset; |
| } |
| #endif |
| |
| /* XXX The size argument hopefully will have to be changed to the |
| real size of the user-level sigset_t. */ |
| #ifdef INTERNAL_SYSCALL |
| INTERNAL_SYSCALL_DECL (err); |
| do |
| ret = INTERNAL_SYSCALL (rt_sigtimedwait, err, 4, CHECK_SIGSET (set), |
| NULL, NULL, _NSIG / 8); |
| while (INTERNAL_SYSCALL_ERROR_P (ret, err) |
| && INTERNAL_SYSCALL_ERRNO (ret, err) == EINTR); |
| if (! INTERNAL_SYSCALL_ERROR_P (ret, err)) |
| { |
| *sig = ret; |
| ret = 0; |
| } |
| else |
| ret = INTERNAL_SYSCALL_ERRNO (ret, err); |
| #else |
| do |
| ret = INLINE_SYSCALL (rt_sigtimedwait, 4, CHECK_SIGSET (set), |
| NULL, NULL, _NSIG / 8); |
| while (ret == -1 && errno == EINTR); |
| if (ret != -1) |
| { |
| *sig = ret; |
| ret = 0; |
| } |
| else |
| ret = errno; |
| #endif |
| |
| return ret; |
| } |
| |
| int |
| __sigwait (set, sig) |
| const sigset_t *set; |
| int *sig; |
| { |
| if (SINGLE_THREAD_P) |
| return do_sigwait (set, sig); |
| |
| int oldtype = LIBC_CANCEL_ASYNC (); |
| |
| int result = do_sigwait (set, sig); |
| |
| LIBC_CANCEL_RESET (oldtype); |
| |
| return result; |
| } |
| libc_hidden_def (__sigwait) |
| weak_alias (__sigwait, sigwait) |
| #else |
| # include <sysdeps/posix/sigwait.c> |
| #endif |
| strong_alias (__sigwait, __libc_sigwait) |