forgot to commit this...

svn-id: r22975

1 files changed, 85 insertions, 0 deletions

diff --git a/backends/ps2/ps2mutex.cpp b/backends/ps2/ps2mutex.cpp
new file mode 100644
index 0000000000..6ae9a3a005
--- /dev/null
+++ b/backends/ps2/ps2mutex.cpp
@@ -0,0 +1,85 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2005-2006 The ScummVM project
+ *
+ * This program 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 (at your option) any later version.
+
+ * This program 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 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "backends/ps2/systemps2.h"
+
+OSystem::MutexRef OSystem_PS2::createMutex(void) {
+	WaitSema(_mutexSema);
+	Ps2Mutex *mutex = NULL;
+	for (int i = 0; i < MAX_MUTEXES; i++)
+		if (_mutex[i].sema < 0) {
+			mutex = _mutex + i;
+			break;
+		}
+	if (mutex) {
+		ee_sema_t newSema;
+		newSema.init_count = 1;
+		newSema.max_count = 1;
+		mutex->sema = CreateSema(&newSema);
+		mutex->owner = mutex->count = 0;
+	} else
+		printf("OSystem_PS2::createMutex: ran out of Mutex slots!\n");
+	SignalSema(_mutexSema);
+	return (OSystem::MutexRef)mutex;
+}
+
+void OSystem_PS2::lockMutex(MutexRef mutex) {
+	WaitSema(_mutexSema);
+	Ps2Mutex *sysMutex = (Ps2Mutex*)mutex;
+	int tid = GetThreadId();
+	assert(tid != 0);
+	if (sysMutex->owner && (sysMutex->owner == tid))
+		sysMutex->count++;
+	else {
+		SignalSema(_mutexSema);
+		WaitSema(sysMutex->sema);
+		WaitSema(_mutexSema);
+		sysMutex->owner = tid;
+		sysMutex->count = 0;
+	}
+	SignalSema(_mutexSema);
+}
+
+void OSystem_PS2::unlockMutex(MutexRef mutex) {
+	WaitSema(_mutexSema);
+	Ps2Mutex *sysMutex = (Ps2Mutex*)mutex;
+	int tid = GetThreadId();
+	if (sysMutex->owner && sysMutex->count && (sysMutex->owner == tid))
+		sysMutex->count--;
+	else {
+		assert(sysMutex->count == 0);
+		SignalSema(sysMutex->sema);
+		sysMutex->owner = 0;
+	}
+	SignalSema(_mutexSema);
+}
+
+void OSystem_PS2::deleteMutex(MutexRef mutex) {
+	WaitSema(_mutexSema);
+	Ps2Mutex *sysMutex = (Ps2Mutex*)mutex;
+	if (sysMutex->owner || sysMutex->count)
+		printf("WARNING: Deleting LOCKED mutex!\n");
+	DeleteSema(sysMutex->sema);
+	sysMutex->sema = -1;
+	SignalSema(_mutexSema);
+}
+