mirror of
https://github.com/libretro/scummvm.git
synced 2025-01-04 16:38:55 +00:00
86 lines
2.3 KiB
C++
86 lines
2.3 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2005-2006 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "backends/ps2/systemps2.h"
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OSystem::MutexRef OSystem_PS2::createMutex(void) {
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WaitSema(_mutexSema);
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Ps2Mutex *mutex = NULL;
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for (int i = 0; i < MAX_MUTEXES; i++)
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if (_mutex[i].sema < 0) {
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mutex = _mutex + i;
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break;
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}
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if (mutex) {
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ee_sema_t newSema;
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newSema.init_count = 1;
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newSema.max_count = 1;
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mutex->sema = CreateSema(&newSema);
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mutex->owner = mutex->count = 0;
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} else
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printf("OSystem_PS2::createMutex: ran out of Mutex slots!\n");
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SignalSema(_mutexSema);
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return (OSystem::MutexRef)mutex;
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}
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void OSystem_PS2::lockMutex(MutexRef mutex) {
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WaitSema(_mutexSema);
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Ps2Mutex *sysMutex = (Ps2Mutex*)mutex;
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int tid = GetThreadId();
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assert(tid != 0);
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if (sysMutex->owner && (sysMutex->owner == tid))
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sysMutex->count++;
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else {
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SignalSema(_mutexSema);
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WaitSema(sysMutex->sema);
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WaitSema(_mutexSema);
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sysMutex->owner = tid;
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sysMutex->count = 0;
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}
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SignalSema(_mutexSema);
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}
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void OSystem_PS2::unlockMutex(MutexRef mutex) {
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WaitSema(_mutexSema);
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Ps2Mutex *sysMutex = (Ps2Mutex*)mutex;
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int tid = GetThreadId();
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if (sysMutex->owner && sysMutex->count && (sysMutex->owner == tid))
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sysMutex->count--;
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else {
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assert(sysMutex->count == 0);
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SignalSema(sysMutex->sema);
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sysMutex->owner = 0;
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}
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SignalSema(_mutexSema);
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}
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void OSystem_PS2::deleteMutex(MutexRef mutex) {
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WaitSema(_mutexSema);
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Ps2Mutex *sysMutex = (Ps2Mutex*)mutex;
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if (sysMutex->owner || sysMutex->count)
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printf("WARNING: Deleting LOCKED mutex!\n");
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DeleteSema(sysMutex->sema);
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sysMutex->sema = -1;
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SignalSema(_mutexSema);
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}
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