diff options
Diffstat (limited to 'lib/libkse/thread/thr_sigwait.c')
| -rw-r--r-- | lib/libkse/thread/thr_sigwait.c | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/lib/libkse/thread/thr_sigwait.c b/lib/libkse/thread/thr_sigwait.c deleted file mode 100644 index 590f9db46315..000000000000 --- a/lib/libkse/thread/thr_sigwait.c +++ /dev/null @@ -1,132 +0,0 @@ -/* - * Copyright (c) 1997 John Birrell <jb@cimlogic.com.au>. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by John Birrell. - * 4. Neither the name of the author nor the names of any co-contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - */ -#include <signal.h> -#include <errno.h> -#ifdef _THREAD_SAFE -#include <pthread.h> -#include "pthread_private.h" - -int -sigwait(const sigset_t * set, int *sig) -{ - int ret = 0; - int i; - sigset_t tempset; - struct sigaction act; - - /* - * Specify the thread kernel signal handler. - */ - act.sa_handler = (void (*) ()) _thread_sig_handler; - act.sa_flags = SA_RESTART; - act.sa_mask = *set; - - /* - * These signals can't be waited on. - */ - sigdelset(&act.sa_mask, SIGKILL); - sigdelset(&act.sa_mask, SIGSTOP); - sigdelset(&act.sa_mask, SIGVTALRM); - sigdelset(&act.sa_mask, SIGCHLD); - sigdelset(&act.sa_mask, SIGINFO); - - /* Check to see if a pending signal is in the wait mask. */ - if (tempset = (_thread_run->sigpend & act.sa_mask)) { - /* Enter a loop to find a pending signal: */ - for (i = 1; i < NSIG; i++) { - if (sigismember (&tempset, i)) - break; - } - - /* Clear the pending signal: */ - sigdelset(&_thread_run->sigpend,i); - - /* Return the signal number to the caller: */ - *sig = i; - - return (0); - } - - /* - * Enter a loop to find the signals that are SIG_DFL. For - * these signals we must install a dummy signal handler in - * order for the kernel to pass them in to us. POSIX says - * that the application must explicitly install a dummy - * handler for signals that are SIG_IGN in order to sigwait - * on them. Note that SIG_IGN signals are left in the - * mask because a subsequent sigaction could enable an - * ignored signal. - */ - for (i = 1; i < NSIG; i++) { - if (sigismember(&act.sa_mask, i)) { - if (_thread_sigact[i - 1].sa_handler == SIG_DFL) - if (_thread_sys_sigaction(i,&act,NULL) != 0) - ret = -1; - } - } - if (ret == 0) { - - /* - * Save the wait signal mask. The wait signal - * mask is independent of the threads signal mask - * and requires separate storage. - */ - _thread_run->data.sigwait = &act.sa_mask; - - /* Wait for a signal: */ - _thread_kern_sched_state(PS_SIGWAIT, __FILE__, __LINE__); - - /* Return the signal number to the caller: */ - *sig = _thread_run->signo; - - /* - * Probably unnecessary, but since it's in a union struct - * we don't know how it could be used in the future. - */ - _thread_run->data.sigwait = NULL; - } - - /* Restore the sigactions: */ - act.sa_handler = SIG_DFL; - for (i = 1; i < NSIG; i++) { - if (sigismember(&act.sa_mask, i) && - (_thread_sigact[i - 1].sa_handler == SIG_DFL)) { - if (_thread_sys_sigaction(i,&act,NULL) != 0) - ret = -1; - } - } - - /* Return the completion status: */ - return (ret); -} -#endif |