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108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
/* Copyright (C) 1997-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <signal.h>
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#define __need_NULL
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#include <stddef.h>
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#include <string.h>
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#include <nptl/pthreadP.h>
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#include <sysdep-cancel.h>
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#include <sys/syscall.h>
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#ifdef __NR_rt_sigtimedwait
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/* Return any pending signal or wait for one for the given time. */
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static int
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do_sigwait (const sigset_t *set, int *sig)
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{
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int ret;
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#ifdef SIGCANCEL
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sigset_t tmpset;
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if (set != NULL
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&& (__builtin_expect (__sigismember (set, SIGCANCEL), 0)
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# ifdef SIGSETXID
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|| __builtin_expect (__sigismember (set, SIGSETXID), 0)
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# endif
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))
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{
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/* Create a temporary mask without the bit for SIGCANCEL set. */
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// We are not copying more than we have to.
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memcpy (&tmpset, set, _NSIG / 8);
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__sigdelset (&tmpset, SIGCANCEL);
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# ifdef SIGSETXID
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__sigdelset (&tmpset, SIGSETXID);
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# endif
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set = &tmpset;
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}
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#endif
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/* XXX The size argument hopefully will have to be changed to the
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real size of the user-level sigset_t. */
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#ifdef INTERNAL_SYSCALL
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INTERNAL_SYSCALL_DECL (err);
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do
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ret = INTERNAL_SYSCALL (rt_sigtimedwait, err, 4, set,
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NULL, NULL, _NSIG / 8);
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while (INTERNAL_SYSCALL_ERROR_P (ret, err)
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&& INTERNAL_SYSCALL_ERRNO (ret, err) == EINTR);
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if (! INTERNAL_SYSCALL_ERROR_P (ret, err))
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{
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*sig = ret;
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ret = 0;
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}
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else
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ret = INTERNAL_SYSCALL_ERRNO (ret, err);
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#else
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do
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ret = INLINE_SYSCALL (rt_sigtimedwait, 4, set, NULL, NULL, _NSIG / 8);
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while (ret == -1 && errno == EINTR);
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if (ret != -1)
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{
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*sig = ret;
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ret = 0;
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}
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else
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ret = errno;
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#endif
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return ret;
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}
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int
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__sigwait (const sigset_t *set, int *sig)
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{
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if (SINGLE_THREAD_P)
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return do_sigwait (set, sig);
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int oldtype = LIBC_CANCEL_ASYNC ();
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int result = do_sigwait (set, sig);
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LIBC_CANCEL_RESET (oldtype);
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return result;
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}
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libc_hidden_def (__sigwait)
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weak_alias (__sigwait, sigwait)
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#else
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# include <sysdeps/posix/sigwait.c>
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#endif
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strong_alias (__sigwait, __libc_sigwait)
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