/** * @file llworkerthread.cpp * * $LicenseInfo:firstyear=2004&license=viewergpl$ * * Copyright (c) 2004-2009, Linden Research, Inc. * * Second Life Viewer Source Code * The source code in this file ("Source Code") is provided by Linden Lab * to you under the terms of the GNU General Public License, version 2.0 * ("GPL"), unless you have obtained a separate licensing agreement * ("Other License"), formally executed by you and Linden Lab. Terms of * the GPL can be found in doc/GPL-license.txt in this distribution, or * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2 * * There are special exceptions to the terms and conditions of the GPL as * it is applied to this Source Code. View the full text of the exception * in the file doc/FLOSS-exception.txt in this software distribution, or * online at * http://secondlifegrid.net/programs/open_source/licensing/flossexception * * By copying, modifying or distributing this software, you acknowledge * that you have read and understood your obligations described above, * and agree to abide by those obligations. * * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, * COMPLETENESS OR PERFORMANCE. * $/LicenseInfo$ */ #include "linden_common.h" #include "llworkerthread.h" #include "llstl.h" #if USE_FRAME_CALLBACK_MANAGER #include "llframecallbackmanager.h" #endif //============================================================================ // Run on MAIN thread LLWorkerThread::LLWorkerThread(const std::string& name, bool threaded) : LLQueuedThread(name, threaded) { mDeleteMutex = new LLMutex(NULL); if(!mLocalAPRFilePoolp) { mLocalAPRFilePoolp = new LLVolatileAPRPool() ; } } LLWorkerThread::~LLWorkerThread() { // Delete any workers in the delete queue (should be safe - had better be!) if (!mDeleteList.empty()) { llwarns << "Worker Thread: " << mName << " destroyed with " << mDeleteList.size() << " entries in delete list." << llendl; } delete mDeleteMutex; // ~LLQueuedThread() will be called here } // virtual S32 LLWorkerThread::update(U32 max_time_ms) { S32 res = LLQueuedThread::update(max_time_ms); // Delete scheduled workers std::vector<LLWorkerClass*> delete_list; std::vector<LLWorkerClass*> abort_list; mDeleteMutex->lock(); for (delete_list_t::iterator iter = mDeleteList.begin(); iter != mDeleteList.end(); ) { delete_list_t::iterator curiter = iter++; LLWorkerClass* worker = *curiter; if (worker->deleteOK()) { if (worker->getFlags(LLWorkerClass::WCF_WORK_FINISHED)) { delete_list.push_back(worker); mDeleteList.erase(curiter); } else if (!worker->getFlags(LLWorkerClass::WCF_ABORT_REQUESTED)) { abort_list.push_back(worker); } } } mDeleteMutex->unlock(); // abort and delete after releasing mutex for (std::vector<LLWorkerClass*>::iterator iter = abort_list.begin(); iter != abort_list.end(); ++iter) { (*iter)->abortWork(false); } for (std::vector<LLWorkerClass*>::iterator iter = delete_list.begin(); iter != delete_list.end(); ++iter) { LLWorkerClass* worker = *iter; if (worker->mRequestHandle) { // Finished but not completed completeRequest(worker->mRequestHandle); worker->mRequestHandle = LLWorkerThread::nullHandle(); worker->clearFlags(LLWorkerClass::WCF_HAVE_WORK); } delete *iter; } // delete and aborted entries mean there's still work to do res += delete_list.size() + abort_list.size(); return res; } //---------------------------------------------------------------------------- LLWorkerThread::handle_t LLWorkerThread::addWorkRequest(LLWorkerClass* workerclass, S32 param, U32 priority) { handle_t handle = generateHandle(); WorkRequest* req = new WorkRequest(handle, priority, workerclass, param); bool res = addRequest(req); if (!res) { llerrs << "add called after LLWorkerThread::cleanupClass()" << llendl; req->deleteRequest(); handle = nullHandle(); } return handle; } void LLWorkerThread::deleteWorker(LLWorkerClass* workerclass) { mDeleteMutex->lock(); mDeleteList.push_back(workerclass); mDeleteMutex->unlock(); } //============================================================================ // Runs on its OWN thread LLWorkerThread::WorkRequest::WorkRequest(handle_t handle, U32 priority, LLWorkerClass* workerclass, S32 param) : LLQueuedThread::QueuedRequest(handle, priority), mWorkerClass(workerclass), mParam(param) { } LLWorkerThread::WorkRequest::~WorkRequest() { } // virtual (required for access by LLWorkerThread) void LLWorkerThread::WorkRequest::deleteRequest() { LLQueuedThread::QueuedRequest::deleteRequest(); } // virtual bool LLWorkerThread::WorkRequest::processRequest() { LLWorkerClass* workerclass = getWorkerClass(); workerclass->setWorking(true); bool complete = workerclass->doWork(getParam()); workerclass->setWorking(false); return complete; } // virtual void LLWorkerThread::WorkRequest::finishRequest(bool completed) { LLWorkerClass* workerclass = getWorkerClass(); workerclass->finishWork(getParam(), completed); U32 flags = LLWorkerClass::WCF_WORK_FINISHED | (completed ? 0 : LLWorkerClass::WCF_WORK_ABORTED); workerclass->setFlags(flags); } //============================================================================ // LLWorkerClass:: operates in main thread LLWorkerClass::LLWorkerClass(LLWorkerThread* workerthread, const std::string& name) : mWorkerThread(workerthread), mWorkerClassName(name), mRequestHandle(LLWorkerThread::nullHandle()), mRequestPriority(LLWorkerThread::PRIORITY_NORMAL), mMutex(NULL), mWorkFlags(0) { if (!mWorkerThread) { llerrs << "LLWorkerClass() called with NULL workerthread: " << name << llendl; } } LLWorkerClass::~LLWorkerClass() { llassert_always(!(mWorkFlags & WCF_WORKING)); llassert_always(mWorkFlags & WCF_DELETE_REQUESTED); llassert_always(!mMutex.isLocked()); if (mRequestHandle != LLWorkerThread::nullHandle()) { LLWorkerThread::WorkRequest* workreq = (LLWorkerThread::WorkRequest*)mWorkerThread->getRequest(mRequestHandle); if (!workreq) { llerrs << "LLWorkerClass destroyed with stale work handle" << llendl; } if (workreq->getStatus() != LLWorkerThread::STATUS_ABORTED && workreq->getStatus() != LLWorkerThread::STATUS_COMPLETE) { llerrs << "LLWorkerClass destroyed with active worker! Worker Status: " << workreq->getStatus() << llendl; } } } void LLWorkerClass::setWorkerThread(LLWorkerThread* workerthread) { mMutex.lock(); if (mRequestHandle != LLWorkerThread::nullHandle()) { llerrs << "LLWorkerClass attempt to change WorkerThread with active worker!" << llendl; } mWorkerThread = workerthread; mMutex.unlock(); } //---------------------------------------------------------------------------- //virtual void LLWorkerClass::finishWork(S32 param, bool success) { } //virtual bool LLWorkerClass::deleteOK() { return true; // default always OK } //---------------------------------------------------------------------------- // Called from worker thread void LLWorkerClass::setWorking(bool working) { mMutex.lock(); if (working) { llassert_always(!(mWorkFlags & WCF_WORKING)); setFlags(WCF_WORKING); } else { llassert_always((mWorkFlags & WCF_WORKING)); clearFlags(WCF_WORKING); } mMutex.unlock(); } //---------------------------------------------------------------------------- bool LLWorkerClass::yield() { LLThread::yield(); mWorkerThread->checkPause(); bool res; mMutex.lock(); res = (getFlags() & WCF_ABORT_REQUESTED) ? true : false; mMutex.unlock(); return res; } //---------------------------------------------------------------------------- // calls startWork, adds doWork() to queue void LLWorkerClass::addWork(S32 param, U32 priority) { mMutex.lock(); llassert_always(!(mWorkFlags & (WCF_WORKING|WCF_HAVE_WORK))); if (mRequestHandle != LLWorkerThread::nullHandle()) { llerrs << "LLWorkerClass attempt to add work with active worker!" << llendl; } #if _DEBUG // llinfos << "addWork: " << mWorkerClassName << " Param: " << param << llendl; #endif startWork(param); clearFlags(WCF_WORK_FINISHED|WCF_WORK_ABORTED); setFlags(WCF_HAVE_WORK); mRequestHandle = mWorkerThread->addWorkRequest(this, param, priority); mMutex.unlock(); } void LLWorkerClass::abortWork(bool autocomplete) { mMutex.lock(); #if _DEBUG // LLWorkerThread::WorkRequest* workreq = mWorkerThread->getRequest(mRequestHandle); // if (workreq) // llinfos << "abortWork: " << mWorkerClassName << " Param: " << workreq->getParam() << llendl; #endif if (mRequestHandle != LLWorkerThread::nullHandle()) { mWorkerThread->abortRequest(mRequestHandle, autocomplete); mWorkerThread->setPriority(mRequestHandle, LLQueuedThread::PRIORITY_IMMEDIATE); setFlags(WCF_ABORT_REQUESTED); } mMutex.unlock(); } // if doWork is complete or aborted, call endWork() and return true bool LLWorkerClass::checkWork(bool aborting) { LLMutexLock lock(&mMutex); bool complete = false, abort = false; if (mRequestHandle != LLWorkerThread::nullHandle()) { LLWorkerThread::WorkRequest* workreq = (LLWorkerThread::WorkRequest*)mWorkerThread->getRequest(mRequestHandle); llassert_always(workreq); LLQueuedThread::status_t status = workreq->getStatus(); if (status == LLWorkerThread::STATUS_ABORTED) { complete = true; abort = true; } else if (status == LLWorkerThread::STATUS_COMPLETE) { complete = true; } else { llassert_always(!aborting || (workreq->getFlags() & LLQueuedThread::FLAG_ABORT)); } if (complete) { llassert_always(!(getFlags(WCF_WORKING))); endWork(workreq->getParam(), abort); mWorkerThread->completeRequest(mRequestHandle); mRequestHandle = LLWorkerThread::nullHandle(); clearFlags(WCF_HAVE_WORK); } } else { complete = true; } return complete; } void LLWorkerClass::scheduleDelete() { bool do_delete = false; mMutex.lock(); if (!(getFlags(WCF_DELETE_REQUESTED))) { setFlags(WCF_DELETE_REQUESTED); do_delete = true; } mMutex.unlock(); if (do_delete) { mWorkerThread->deleteWorker(this); } } void LLWorkerClass::setPriority(U32 priority) { mMutex.lock(); if (mRequestHandle != LLWorkerThread::nullHandle()) { mRequestPriority = priority; mWorkerThread->setPriority(mRequestHandle, priority); } mMutex.unlock(); } //============================================================================