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dpavlin |
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* HT Editor |
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* thread.cc |
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* |
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* Copyright (C) 2003 Sebastian Biallas (sb@biallas.net) |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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* |
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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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* |
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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., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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#include <cstdio> |
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#include <cstdlib> |
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#include "debug.h" |
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#include "except.h" |
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#include "thread.h" |
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static void *start_thread_routine(void *t) |
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{ |
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Thread *thread = ((Thread *)t); |
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thread->setState(threadRunning); |
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void *ret = thread->run(); |
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if (thread->getState() == threadRunning) { |
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/* |
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* Thread reached end of run(), and most likely |
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* didn't call terminate(), so we do here |
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*/ |
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thread->terminate(ret); |
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} |
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return ret; |
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} |
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Thread::Thread() |
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{ |
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mThreadValid = false; |
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mState = threadInited; |
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mSem = new Semaphore(); |
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} |
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Thread::~Thread() |
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{ |
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if (mState == threadStarting || mState == threadRunning) { |
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// in a perfect world, we'd throw an exception here |
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fprintf(stderr, "Attempt to kill running thread!\n"); |
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// but world isn't perfect |
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exit(1); |
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} |
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if (mThreadValid) { |
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sys_destroy_thread(mThread); |
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} |
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} |
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void Thread::start(void *param) |
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{ |
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setState(threadStarting); |
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mThreadValid = true; |
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sys_create_thread(&mThread, 0, start_thread_routine, this); |
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} |
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ThreadState Thread::getState() |
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{ |
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return mState; |
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} |
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void Thread::setState(ThreadState state) |
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{ |
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mSem->lock(); |
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mState = state; |
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mSem->signalAll(); |
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mSem->unlock(); |
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} |
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void *Thread::waitForExit() |
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{ |
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mSem->lock(); |
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while (mState == threadStarting) { |
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mSem->wait(); |
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} |
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mSem->unlock(); |
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mSem->lock(); |
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while (mState == threadRunning) { |
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mSem->wait(); |
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} |
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mSem->unlock(); |
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return NULL; |
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} |
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void Thread::waitForRunning() |
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{ |
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mSem->lock(); |
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while (mState == threadStarting) { |
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mSem->wait(); |
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} |
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mSem->unlock(); |
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} |
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void Thread::terminate(void *ret) |
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{ |
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if (mState == threadRunning) { |
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ASSERT(mThreadValid); |
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setState(threadFinished); |
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sys_exit_thread(ret); |
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} else { |
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throw MsgException("Arrrrrrg. Please read the docu. You musn't call terminate() from outside the thread."); |
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} |
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} |
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/* |
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* |
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*/ |
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ThreadFunction::ThreadFunction(sys_thread_function f, void *aParam) |
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:Thread() |
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{ |
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mFunc = f; |
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mParam = aParam; |
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} |
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void *ThreadFunction::run() |
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{ |
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terminate(mFunc(mParam)); |
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// terminate does not return |
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return NULL; |
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} |
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/* |
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* |
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*/ |
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Mutex::Mutex() |
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{ |
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sys_create_mutex(&mutex); |
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} |
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Mutex::~Mutex() |
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{ |
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sys_destroy_mutex(mutex); |
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} |
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void Mutex::lock() |
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{ |
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sys_lock_mutex(mutex); |
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} |
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void Mutex::unlock() |
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{ |
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sys_unlock_mutex(mutex); |
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} |
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int Mutex::trylock() |
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{ |
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return sys_trylock_mutex(mutex); |
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} |
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/* |
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* |
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*/ |
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Semaphore::Semaphore() |
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{ |
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sys_create_semaphore(&sem); |
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} |
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Semaphore::~Semaphore() |
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{ |
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sys_destroy_semaphore(sem); |
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} |
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void Semaphore::signal() |
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{ |
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sys_signal_semaphore(sem); |
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} |
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void Semaphore::signalAll() |
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{ |
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sys_signal_all_semaphore(sem); |
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} |
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void Semaphore::wait() |
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{ |
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sys_wait_semaphore(sem); |
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} |
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void Semaphore::lock() |
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{ |
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sys_lock_semaphore(sem); |
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} |
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void Semaphore::unlock() |
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{ |
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sys_unlock_semaphore(sem); |
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} |
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