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/*
* The contents of this file are subject to the AOLserver Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://aolserver.com/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is AOLserver Code and related documentation
* distributed by AOL.
*
* The Initial Developer of the Original Code is America Online,
* Inc. Portions created by AOL are Copyright (C) 1999 America Online,
* Inc. All Rights Reserved.
*
* Alternatively, the contents of this file may be used under the terms
* of the GNU General Public License (the "GPL"), in which case the
* provisions of GPL are applicable instead of those above. If you wish
* to allow use of your version of this file only under the terms of the
* GPL and not to allow others to use your version of this file under the
* License, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the GPL.
* If you do not delete the provisions above, a recipient may use your
* version of this file under either the License or the GPL.
*/
/*
* signal.c --
*
* Routines for signal handling.
*/
static const char *RCSID = "@(#) $Header: /cvsroot/aolserver/aolserver/thread/signal.c,v 1.4 2000/10/03 17:55:20 jgdavidson Exp $, compiled: " __DATE__ " " __TIME__;
#ifdef __hp10
#include <pthread.h>
#endif
#include "thread.h"
#ifdef MACOSX
int sigwait(const sigset_t *set, int *sig);
#endif
/*
*----------------------------------------------------------------------
*
* ns_sigwait --
*
* Posix style sigwait().
*
* Results:
* 0 on success, otherwise an error code.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
ns_sigwait(sigset_t * set, int *sig)
{
int ret;
#if defined(__unixware) || defined(__hp10)
/* POSIX.1c Draft 6. */
ret = sigwait(set);
if (ret < 0) {
ret = errno;
} else {
*sig = ret;
ret = 0;
}
#elif defined(__FreeBSD__)
ret = sigwait(set, sig);
if (ret != 0) {
ret = errno;
}
#else
/* POSIX.1c */
ret = sigwait(set, sig);
#endif
return ret;
}
/*
*----------------------------------------------------------------------
*
* ns_signal --
*
* Install a process-wide signal handler. Note that the handler
* is shared among all threads (although the signal mask is
* per-thread).
*
* Results:
* 0 on success, -1 on error with specific error code set in errno.
*
* Side effects:
* Handler will be called when signal is received in this thread.
*
*----------------------------------------------------------------------
*/
int
ns_signal(int sig, void (*proc) (int))
{
struct sigaction sa;
sa.sa_flags = 0;
sa.sa_handler = (void (*)(int)) proc;
sigemptyset(&sa.sa_mask);
return sigaction(sig, &sa, NULL);
}
/*
*----------------------------------------------------------------------
*
* sigwait --
*
* sigwait for Apple OS/X. Modified from sigwait in the Linux
* pthread library.
*
* Results:
* Signal received.
*
* Side effects:
* Thread suspends until signal arrived.
*
*----------------------------------------------------------------------
*/
#ifdef MACOSX
static void
sigwaithandler(int sig)
{
volatile Thread *thisPtr = NsGetThread();
thisPtr->exitarg = (void *) sig;
}
int
sigwait(const sigset_t *set, int *sig)
{
sigset_t mask;
int s;
struct sigaction action, saved_signals[NSIG];
volatile Thread *thisPtr = NsGetThread();
sigfillset(&mask);
for (s = 0; s < NSIG; s++) {
if (sigismember(set, s)) {
sigdelset(&mask, s);
action.sa_handler = sigwaithandler;
sigfillset(&action.sa_mask);
action.sa_flags = 0;
sigaction(s, &action, &(saved_signals[s]));
}
}
sigsuspend(&mask);
for (s = 0; s < NSIG; s++) {
if (sigismember(set, s)) {
sigaction(s, &(saved_signals[s]), NULL);
}
}
*sig = (int) thisPtr->exitarg;
thisPtr->exitarg = NULL;
return 0;
}
#endif
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