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/* 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);
}
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