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thread.cpp
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thread.cpp
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#include "thread.h"
namespace Util{
namespace Thread{
#ifdef USE_SDL
void initializeLock(Lock * lock){
*lock = SDL_CreateMutex();
}
int acquireLock(Lock * lock){
return SDL_LockMutex(*lock);
}
int releaseLock(Lock * lock){
return SDL_UnlockMutex(*lock);
}
void destroyLock(Lock * lock){
SDL_DestroyMutex(*lock);
}
void initializeSemaphore(Semaphore * semaphore, unsigned int value){
*semaphore = SDL_CreateSemaphore(value);
}
void destroySemaphore(Semaphore * semaphore){
SDL_DestroySemaphore(*semaphore);
}
void semaphoreDecrease(Semaphore * semaphore){
SDL_SemWait(*semaphore);
}
void semaphoreIncrease(Semaphore * semaphore){
SDL_SemPost(*semaphore);
}
bool createThread(Id * thread, void * attributes, ThreadFunction function, void * arg){
*thread = SDL_CreateThread(function, arg);
return *thread != NULL;
}
void joinThread(Id thread){
SDL_WaitThread(thread, NULL);
}
void cancelThread(Id thread){
SDL_KillThread(thread);
}
#else
void initializeLock(Lock * lock){
pthread_mutex_init(lock, NULL);
}
int acquireLock(Lock * lock){
return pthread_mutex_lock(lock);
}
int releaseLock(Lock * lock){
return pthread_mutex_unlock(lock);
}
void initializeSemaphore(Semaphore * semaphore, unsigned int value){
sem_init(semaphore, 0, value);
}
void destroySemaphore(Semaphore * semaphore){
/* nothing */
}
void semaphoreDecrease(Semaphore * semaphore){
sem_wait(semaphore);
}
void semaphoreIncrease(Semaphore * semaphore){
sem_post(semaphore);
}
bool createThread(Id * thread, void * attributes, ThreadFunction function, void * arg){
return pthread_create(thread, (pthread_attr_t*) attributes, function, arg) == 0;
}
void joinThread(Id thread){
pthread_join(thread, NULL);
}
void cancelThread(Id thread){
/* FIXME: cancel is not implemented for libogc, find another way.
* thread suspend/resume is there, though.
*/
#if !defined(WII)
pthread_cancel(thread);
#endif
}
void destroyLock(Lock * lock){
/* nothing */
}
#endif
}
WaitThread::WaitThread():
done(false){
Thread::initializeLock(&doneLock);
}
WaitThread::WaitThread(Thread::ThreadFunction thread, void * arg){
Thread::initializeLock(&doneLock);
start(thread, arg);
}
static void * do_thread(void * arg){
WaitThread * thread = (WaitThread *) arg;
thread->doRun();
return NULL;
}
void WaitThread::doRun(){
this->function(this->arg);
Thread::acquireLock(&doneLock);
this->done = true;
Thread::releaseLock(&doneLock);
}
void WaitThread::start(Thread::ThreadFunction thread, void * arg){
done = false;
this->arg = arg;
this->function = thread;
Thread::createThread(&this->thread, NULL, (Thread::ThreadFunction) do_thread, this);
}
bool WaitThread::isRunning(){
Thread::acquireLock(&doneLock);
bool what = done;
Thread::releaseLock(&doneLock);
return what;
}
void WaitThread::kill(){
Thread::cancelThread(thread);
Thread::joinThread(thread);
}
WaitThread::~WaitThread(){
/* FIXME: Should we join the thread? */
/* pthread_join(thread); */
}
ThreadBoolean::ThreadBoolean(volatile bool & what, Thread::Lock & lock):
what(what),
lock(lock){
}
bool ThreadBoolean::get(){
Thread::acquireLock(&lock);
bool b = what;
Thread::releaseLock(&lock);
return b;
}
void ThreadBoolean::set(bool value){
Thread::acquireLock(&lock);
what = value;
Thread::releaseLock(&lock);
}
}

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thread.cpp (3 KB)

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