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Diffstat (limited to 'backends/platform/psp/thread.cpp')
| -rw-r--r-- | backends/platform/psp/thread.cpp | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/backends/platform/psp/thread.cpp b/backends/platform/psp/thread.cpp new file mode 100644 index 0000000000..e757c2f575 --- /dev/null +++ b/backends/platform/psp/thread.cpp @@ -0,0 +1,234 @@ +/* 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. + * + * $URL$ + * $Id$ + * + */ + +#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 +} + |