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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
*/
#include <pspthreadman.h>
#include "backends/platform/psp/thread.h"
#include "backends/platform/psp/trace.h"
// Class PspThreadable --------------------------------------------------
// Inherit this to create C++ threads easily
bool PspThreadable::threadCreateAndStart(const char *threadName, int priority, int stackSize, bool useVfpu /*= false*/) {
DEBUG_ENTER_FUNC();
if (_threadId != -1) {
PSP_ERROR("thread already created!\n");
return false;
}
_threadId = sceKernelCreateThread(threadName, __threadCallback, priority, stackSize, THREAD_ATTR_USER, 0); // add VFPU support
if (_threadId < 0) {
PSP_ERROR("failed to create %s thread. Error code %d\n", threadName, _threadId);
return false;
}
// We want to pass the pointer to this, but we'll have to take address of this so use a little trick
PspThreadable *_this = this;
if (sceKernelStartThread(_threadId, sizeof(uint32 *), &_this) < 0) {
PSP_ERROR("failed to start %s thread id[%d]\n", threadName, _threadId);
return false;
}
PSP_DEBUG_PRINT("Started %s thread with id[%x]\n", threadName, _threadId);
return true;
}
// Callback function to be called by PSP kernel
int PspThreadable::__threadCallback(SceSize, void *__this) {
DEBUG_ENTER_FUNC();
PspThreadable *_this = *(PspThreadable **)__this; // Dereference the copied value which was 'this'
_this->threadFunction(); // call the virtual function
return 0;
}
// PspThread class
// Utilities to access general thread functions
void PspThread::delayMillis(uint32 ms) {
sceKernelDelayThread(ms * 1000);
}
void PspThread::delayMicros(uint32 us) {
sceKernelDelayThread(us);
}
// Class PspSemaphore ------------------------------------------------
//#define __PSP_DEBUG_FUNCS__ /* For debugging function calls */
//#define __PSP_DEBUG_PRINT__ /* For debug printouts */
#include "backends/platform/psp/trace.h"
PspSemaphore::PspSemaphore(int initialValue, int maxValue/*=255*/) {
DEBUG_ENTER_FUNC();
_handle = 0;
_handle = (uint32)sceKernelCreateSema("ScummVM Sema", 0 /* attr */,
initialValue, maxValue,
0 /*option*/);
if (!_handle)
PSP_ERROR("failed to create semaphore.\n");
}
PspSemaphore::~PspSemaphore() {
DEBUG_ENTER_FUNC();
if (_handle)
if (sceKernelDeleteSema((SceUID)_handle) < 0)
PSP_ERROR("failed to delete semaphore.\n");
}
int PspSemaphore::numOfWaitingThreads() {
DEBUG_ENTER_FUNC();
SceKernelSemaInfo info;
info.numWaitThreads = 0;
if (sceKernelReferSemaStatus((SceUID)_handle, &info) < 0)
PSP_ERROR("failed to retrieve semaphore info for handle %d\n", _handle);
return info.numWaitThreads;
}
int PspSemaphore::getValue() {
DEBUG_ENTER_FUNC();
SceKernelSemaInfo info;
info.currentCount = 0;
if (sceKernelReferSemaStatus((SceUID)_handle, &info) < 0)
PSP_ERROR("failed to retrieve semaphore info for handle %d\n", _handle);
return info.currentCount;
}
bool PspSemaphore::pollForValue(int value) {
DEBUG_ENTER_FUNC();
if (sceKernelPollSema((SceUID)_handle, value) < 0)
return false;
return true;
}
// false: timeout or error
bool PspSemaphore::takeWithTimeOut(uint32 timeOut) {
DEBUG_ENTER_FUNC();
uint32 *pTimeOut = 0;
if (timeOut)
pTimeOut = &timeOut;
if (sceKernelWaitSema(_handle, 1, pTimeOut) < 0) // we always wait for 1
return false;
return true;
}
bool PspSemaphore::give(int num /*=1*/) {
DEBUG_ENTER_FUNC();
if (sceKernelSignalSema((SceUID)_handle, num) < 0)
return false;
return true;
}
// Class PspMutex ------------------------------------------------------------
bool PspMutex::lock() {
DEBUG_ENTER_FUNC();
int threadId = sceKernelGetThreadId();
bool ret = true;
if (_ownerId == threadId) {
_recursiveCount++;
} else {
ret = _semaphore.take();
_ownerId = threadId;
_recursiveCount = 0;
}
return ret;
}
bool PspMutex::unlock() {
DEBUG_ENTER_FUNC();
int threadId = sceKernelGetThreadId();
bool ret = true;
if (_ownerId != threadId) {
PSP_ERROR("attempt to unlock mutex by thread[%x] as opposed to owner[%x]\n",
threadId, _ownerId);
return false;
}
if (_recursiveCount) {
_recursiveCount--;
} else {
_ownerId = 0;
ret = _semaphore.give(1);
}
return ret;
}
// Class PspCondition -------------------------------------------------
// Release all threads waiting on the condition
void PspCondition::releaseAll() {
_mutex.lock();
if (_waitingThreads > _signaledThreads) { // we have signals to issue
int numWaiting = _waitingThreads - _signaledThreads; // threads we haven't signaled
_signaledThreads = _waitingThreads;
_waitSem.give(numWaiting);
_mutex.unlock();
for (int i=0; i<numWaiting; i++) // wait for threads to tell us they're awake
_doneSem.take();
} else {
_mutex.unlock();
}
}
// Mutex must be taken before entering wait
void PspCondition::wait(PspMutex &externalMutex) {
_mutex.lock();
_waitingThreads++;
_mutex.unlock();
externalMutex.unlock(); // must unlock external mutex
_waitSem.take(); // sleep on the wait semaphore
// let the signaling thread know we're done
_mutex.lock();
if (_signaledThreads > 0 ) {
_doneSem.give(); // let the thread know
_signaledThreads--;
}
_waitingThreads--;
_mutex.unlock();
externalMutex.lock(); // must lock external mutex here for continuation
}
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