diff options
author | Joost Peters | 2009-08-17 12:57:37 +0000 |
---|---|---|
committer | Joost Peters | 2009-08-17 12:57:37 +0000 |
commit | 62bcb2e51b45e744d0b27b124179cb6ec435188d (patch) | |
tree | 1abfe70cf002ed9649293607de019bab518cd38d /backends/platform/psp/powerman.cpp | |
parent | e548e71ba1092a1091da79c5d4652c9d52578e65 (diff) | |
download | scummvm-rg350-62bcb2e51b45e744d0b27b124179cb6ec435188d.tar.gz scummvm-rg350-62bcb2e51b45e744d0b27b124179cb6ec435188d.tar.bz2 scummvm-rg350-62bcb2e51b45e744d0b27b124179cb6ec435188d.zip |
Commit (slightly) modified version of patch #2831248: Allow suspend/resume for PSP
svn-id: r43477
Diffstat (limited to 'backends/platform/psp/powerman.cpp')
-rw-r--r-- | backends/platform/psp/powerman.cpp | 297 |
1 files changed, 297 insertions, 0 deletions
diff --git a/backends/platform/psp/powerman.cpp b/backends/platform/psp/powerman.cpp new file mode 100644 index 0000000000..c553669fc3 --- /dev/null +++ b/backends/platform/psp/powerman.cpp @@ -0,0 +1,297 @@ +/* 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 "./powerman.h" +#include "./trace.h" + +DECLARE_SINGLETON(PowerManager); + + /******************************************* +* +* Constructor +* +********************************************/ +PowerManager::PowerManager() { + _flagMutex = NULL; /* Init mutex handle */ + _listMutex = NULL; /* Init mutex handle */ + _condSuspendable = NULL; /* Init condition variable */ + _condPM = NULL; + + _condSuspendable = SDL_CreateCond(); + if (_condSuspendable <= 0) { + PSPDebugTrace("PowerManager::PowerManager(): Couldn't create condSuspendable\n"); + } + + _condPM = SDL_CreateCond(); + if (_condPM <= 0) { + PSPDebugTrace("PowerManager::PowerManager(): Couldn't create condPM\n"); + } + + _flagMutex = SDL_CreateMutex(); + if (_flagMutex <= 0) { + PSPDebugTrace("PowerManager::PowerManager(): Couldn't create flagMutex\n"); + } + + _listMutex = SDL_CreateMutex(); + if (_listMutex <= 0) { + PSPDebugTrace("PowerManager::PowerManager(): Couldn't create listMutex\n"); + } + + _suspendFlag = false; + _criticalCounter = 0; + } + +/******************************************* +* +* Function to register to be notified when suspend/resume time comes +* +********************************************/ +int PowerManager::registerSuspend(Suspendable *item) { + // Register in list + PSPDebugTrace("In registerSuspend\n"); + + if (SDL_mutexP(_listMutex) != 0) { + PSPDebugTrace("PowerManager::registerSuspend(): Couldn't lock _listMutex %d\n", _listMutex); + } + + _suspendList.push_front(item); + + if (SDL_mutexV(_listMutex) != 0) { + PSPDebugTrace("PowerManager::registerSuspend(): Couldn't unlock _listMutex %d\n", _listMutex); + } + + PSPDebugTrace("Out of registerSuspend\n"); + + return 0; +} + +/******************************************* +* +* Function to unregister to be notified when suspend/resume time comes +* +********************************************/ +int PowerManager::unregisterSuspend(Suspendable *item) { + + PSPDebugTrace("In unregisterSuspend\n"); + + // Unregister from stream list + if (SDL_mutexP(_listMutex) != 0) { + PSPDebugTrace("PowerManager::unregisterSuspend(): Couldn't unlock _listMutex %d\n", _listMutex); + } + + _suspendList.remove(item); + + if (SDL_mutexV(_listMutex) != 0) { + PSPDebugTrace("PowerManager::unregisterSuspend(): Couldn't unlock _listMutex %d\n", _listMutex); + } + + PSPDebugTrace("Out of unregisterSuspend\n"); + + return 0; + } + + /******************************************* +* +* Destructor +* +********************************************/ + PowerManager::~PowerManager() { + SDL_DestroyCond(_condSuspendable); + _condSuspendable = 0; + + SDL_DestroyCond(_condPM); + _condPM = 0; + + SDL_DestroyMutex(_flagMutex); + _flagMutex = 0; + + SDL_DestroyMutex(_listMutex); + _listMutex = 0; + } + + + /******************************************* +* +* Function to be called by threads wanting to block on the PSP entering suspend +* +********************************************/ + int PowerManager::blockOnSuspend() { + return beginCriticalSection(true); +} + + /* + * Function to block on a suspend, then start a non-suspendable critical section + */ +int PowerManager::beginCriticalSection(bool justBlock) { + int ret = PowerManager::NotBlocked; + + if (SDL_mutexP(_flagMutex) != 0) { + PSPDebugTrace("PowerManager::blockOnSuspend(): Couldn't lock flagMutex %d\n", _flagMutex); + ret = PowerManager::Error; + } + + // Check the access flag + if (_suspendFlag == true) { + PSPDebugTrace("Blocking!!\n"); + ret = PowerManager::Blocked; + + // If it's true, we wait for a signal to continue + if( SDL_CondWait(_condSuspendable, _flagMutex) != 0) { + PSPDebugTrace("PowerManager::blockOnSuspend(): Couldn't wait on cond %d\n", _condSuspendable); + } + + PSPDebugTrace("We got blocked!!\n"); + } + + // Now put the pm to sleep + if (justBlock == false) + _criticalCounter++; + + if (SDL_mutexV(_flagMutex) != 0) { + PSPDebugTrace("PowerManager::blockOnSuspend(): Couldn't unlock flagMutex %d\n", _flagMutex); + ret = PowerManager::Error; + } + + return ret; +} + +int PowerManager::endCriticalSection() { + int ret = 0; + + if (SDL_mutexP(_flagMutex) != 0) { + PSPDebugTrace("PowerManager::endCriticalSection(): Couldn't lock flagMutex %d\n", _flagMutex); + ret = PowerManager::Error; + } + + // We're done with our critical section + _criticalCounter--; + + if (_criticalCounter <= 0) { + if(_suspendFlag == true) PSPDebugTrace("Waking up the PM and suspendFlag is true\n"); + + SDL_CondBroadcast(_condPM); + + if (_criticalCounter < 0) { + PSPDebugTrace("PowerManager::endCriticalSection(): Error! Critical counter is %d\n", _criticalCounter); + } + } + + if (SDL_mutexV(_flagMutex) != 0) { + PSPDebugTrace("PowerManager::endCriticalSection(): Couldn't unlock flagMutex %d\n", _flagMutex); + ret = PowerManager::Error; + } + + return ret; +} + + /******************************************* +* +* Callback function to be called to put every Suspendable to suspend +* +********************************************/ +int PowerManager::suspend() { + int ret = 0; + + // First we set the suspend flag to true + if (SDL_mutexP(_flagMutex) != 0) { + PSPDebugTrace("PowerManager::suspend(): Couldn't lock flagMutex %d\n", _flagMutex); + ret = -1; + } + + _suspendFlag = true; + + if (_criticalCounter > 0) + SDL_CondWait(_condPM, _flagMutex); + + if (SDL_mutexV(_flagMutex) != 0) { + PSPDebugTrace("PowerManager::suspend(): Couldn't unlock flagMutex %d\n", _flagMutex); + ret = -1; + } + + // Loop over list, calling suspend() + if (SDL_mutexP(_listMutex) != 0) { + PSPDebugTrace("PowerManager::suspend(): Couldn't lock listMutex %d\n", _listMutex); + ret = -1; + } + + Common::List<Suspendable *>::iterator i = _suspendList.begin(); + + for (; i != _suspendList.end(); i++) { + (*i)->suspend(); + } + + if (SDL_mutexV(_listMutex) != 0) { + PSPDebugTrace("PowerManager::suspend(): Couldn't unlock listMutex %d\n", _listMutex); + ret = -1; + } + + return ret; +} + +/******************************************* +* +* Callback function to resume every Suspendable +* +********************************************/ +int PowerManager::resume() { + int ret = 0; + + // First we notify our Suspendables. Loop over list, calling resume() + if (SDL_mutexP(_listMutex) != 0) { + PSPDebugTrace("PowerManager::resume(): Couldn't lock listMutex %d\n", _listMutex); + ret = -1; + } + + Common::List<Suspendable *>::iterator i = _suspendList.begin(); + + for (; i != _suspendList.end(); i++) { + (*i)->resume(); + } + + if (SDL_mutexV(_listMutex) != 0) { + PSPDebugTrace("PowerManager::resume(): Couldn't unlock listMutex %d\n", _listMutex); + ret = -1; + } + + // Now we set the suspend flag to false + if (SDL_mutexP(_flagMutex) != 0) { + PSPDebugTrace("PowerManager::resume(): Couldn't lock flagMutex %d\n", _flagMutex); + ret = -1; + } + _suspendFlag = false; + + // Signal the other threads to wake up + if (SDL_CondBroadcast(_condSuspendable) != 0) { + PSPDebugTrace("PowerManager::resume(): Couldn't broadcast condition %d\n", _condSuspendable); + ret = -1; + } + + if (SDL_mutexV(_flagMutex) != 0) { + PSPDebugTrace("PowerManager::resume(): Couldn't unlock flagMutex %d\n", _flagMutex); + ret = -1; + } + + return ret; +} |