void ThreadPool::setConcurrentJobs(int concurrentJobs)
{
if (concurrentJobs == mConcurrentJobs)
return;
if (concurrentJobs > mConcurrentJobs) {
std::lock_guard<std::mutex> lock(mMutex);
for (int i = mConcurrentJobs; i < concurrentJobs; ++i) {
mThreads.push_back(new ThreadPoolThread(this));
mThreads.back()->start(mPriority, mThreadStackSize);
}
mConcurrentJobs = concurrentJobs;
} else {
std::unique_lock<std::mutex> lock(mMutex);
for (int i = mConcurrentJobs; i > concurrentJobs; --i) {
ThreadPoolThread* t = mThreads.back();
mThreads.pop_back();
lock.unlock();
t->stop();
t->join();
lock.lock();
delete t;
}
mConcurrentJobs = concurrentJobs;
}
}
ThreadPool::~ThreadPool()
{
if (sInstance == this)
sInstance = 0;
std::unique_lock<std::mutex> lock(mMutex);
mJobs.clear();
lock.unlock();
for (List<ThreadPoolThread*>::iterator it = mThreads.begin();
it != mThreads.end(); ++it) {
ThreadPoolThread* t = *it;
t->stop();
t->join();
delete t;
}
}