Uint32 SyncJobQueue::RunJobs(Uint32 count)
{
Uint32 executed = 0;
assert(count >= 1);
for (Uint32 i = 0; i < count; ++i) {
if (m_queue.empty())
break;
Job* job = m_queue.front();
m_queue.pop_front();
job->OnRun();
executed++;
m_finished.push_back(job);
}
return executed;
}
void AsyncJobQueue::JobRunner::Main()
{
Job *job;
// Lock to prevent destruction of the queue while calling GetJob.
SDL_LockMutex(m_queueDestroyingLock);
if (m_queueDestroyed) {
SDL_UnlockMutex(m_queueDestroyingLock);
return;
}
job = m_jobQueue->GetJob();
SDL_UnlockMutex(m_queueDestroyingLock);
while (job) {
// record the job so we can cancel it in case of premature shutdown
SDL_LockMutex(m_jobLock);
m_job = job;
SDL_UnlockMutex(m_jobLock);
// run the thing
job->OnRun();
// Lock to prevent destruction of the queue while calling Finish
SDL_LockMutex(m_queueDestroyingLock);
if (m_queueDestroyed) {
SDL_UnlockMutex(m_queueDestroyingLock);
return;
}
m_jobQueue->Finish(job, m_threadIdx);
SDL_UnlockMutex(m_queueDestroyingLock);
SDL_LockMutex(m_jobLock);
m_job = 0;
SDL_UnlockMutex(m_jobLock);
// get a new job. this will block normally, or return null during
// shutdown (Lock to protect against the queue being destroyed
// during GetJob)
SDL_LockMutex(m_queueDestroyingLock);
if (m_queueDestroyed) {
SDL_UnlockMutex(m_queueDestroyingLock);
return;
}
job = m_jobQueue->GetJob();
SDL_UnlockMutex(m_queueDestroyingLock);
}
}
void JobRunner::Main()
{
Job *job = m_jobQueue->GetJob();
while (job) {
// record the job so we can cancel it in case of premature shutdown
SDL_LockMutex(m_jobLock);
m_job = job;
SDL_UnlockMutex(m_jobLock);
// run the thing
job->OnRun();
m_jobQueue->Finish(job, m_threadIdx);
SDL_LockMutex(m_jobLock);
m_job = 0;
SDL_UnlockMutex(m_jobLock);
// get a new job. this will block normally, or return null during
// shutdown
job = m_jobQueue->GetJob();
}
}