/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1994-2006, Dave Pare, Jeff Bailey, Thomas Ruschak,
- * Ken Stevens, Steve McClure
+ * Copyright (C) 1994-2012, Dave Pare, Jeff Bailey, Thomas Ruschak,
+ * Ken Stevens, Steve McClure, Markus Armbruster
*
- * This program is free software; you can redistribute it and/or modify
+ * Empire is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* ---
*
* ---
*
* sig.c: Wait for signals
- *
+ *
* Known contributors to this file:
- * Markus Armbruster, 2006
+ * Markus Armbruster, 2006-2007
*/
#include <config.h>
#include <errno.h>
+#include <stddef.h>
#include <signal.h>
-#include "misc.h"
#include "lwp.h"
#include "lwpint.h"
-/* Signals awaited by lwpSigWait() */
-static sigset_t *LwpSigAwaited;
-
/*
- * Signals from LwpSigAwaited catched so far
+ * Signals catched so far.
* Access only with signals blocked!
*/
static sigset_t LwpSigCatched;
+/*
+ * LwpSigCatched changed since last
+ */
+static sig_atomic_t LwpSigCheck;
+
/* The thread waiting for signals in lwpSigWait() */
static struct lwpProc *LwpSigWaiter;
-/* Where to return the signal number to the thread in lwpSigWait() */
-static int *LwpSigPtr;
-
static void lwpCatchAwaitedSig(int);
/*
lwpCatchAwaitedSig(int sig)
{
sigaddset(&LwpSigCatched, sig);
+ LwpSigCheck = 1;
}
/*
if (CANT_HAPPEN(LwpSigWaiter))
return EBUSY;
- res = lwpGetSig(set);
- if (res <= 0) {
+ for (;;) {
+ LwpSigCheck = 0;
+ res = lwpGetSig(set);
+ if (res > 0)
+ break;
lwpStatus(LwpCurrent, "Waiting for signals");
- LwpSigAwaited = set;
- LwpSigPtr = sig;
LwpSigWaiter = LwpCurrent;
lwpReschedule();
- return 0;
}
*sig = res;
return 0;
void
lwpSigWakeup(void)
{
- int res;
-
- if (!LwpSigWaiter)
- return;
- res = lwpGetSig(LwpSigAwaited);
- if (res > 0) {
- *LwpSigPtr = res;
+ if (LwpSigWaiter && LwpSigCheck) {
lwpReady(LwpSigWaiter);
LwpSigWaiter = NULL;
}