99 lines
2 KiB
C++
99 lines
2 KiB
C++
#pragma once
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#include <pthread.h>
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#include <deque>
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template<typename T>
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class BlockingQueue {
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std::deque<T> deque{};
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pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
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pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
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bool cancelled = false;
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public:
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~BlockingQueue();
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T take();
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T &front();
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T &back();
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void put(const T&);
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void put(T&&);
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template< class... Args >
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void emplace_back(Args&&... args);
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void clear();
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void cancel();
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};
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#define run_and_notify(block) \
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pthread_mutex_lock(&this->lock); \
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block \
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pthread_cond_signal(&this->cond); \
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pthread_mutex_unlock(&this->lock);
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template<typename T>
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BlockingQueue<T>::~BlockingQueue() {
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pthread_mutex_destroy(&lock);
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pthread_cond_destroy(&cond);
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}
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template<typename T>
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T BlockingQueue<T>::take() {
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pthread_mutex_lock(&lock);
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cancelled = false;
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while (deque.empty() && !cancelled)
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pthread_cond_wait(&cond, &lock);
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if (cancelled)
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pthread_exit(nullptr);
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T ret(std::move(deque.front()));
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deque.pop_front();
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pthread_mutex_unlock(&lock);
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return ret;
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}
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template<typename T>
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void BlockingQueue<T>::put(const T &s) {
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run_and_notify({ deque.push_back(s); })
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}
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template<typename T>
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void BlockingQueue<T>::put(T &&s) {
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run_and_notify({ deque.push_back(std::move(s)); })
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}
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template<typename T>
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T &BlockingQueue<T>::front() {
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pthread_mutex_lock(&lock);
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auto &ret = deque.front();
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pthread_mutex_unlock(&lock);
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return ret;
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}
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template<typename T>
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T &BlockingQueue<T>::back() {
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pthread_mutex_lock(&lock);
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auto &ret = deque.back();
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pthread_mutex_unlock(&lock);
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return ret;
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}
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template<typename T>
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template<class... Args>
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void BlockingQueue<T>::emplace_back(Args &&... args) {
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run_and_notify({ deque.emplace_back(std::forward<Args>(args)...); })
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}
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template<typename T>
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void BlockingQueue<T>::clear() {
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pthread_mutex_lock(&lock);
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std::deque<T> t;
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deque.swap(t);
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pthread_mutex_unlock(&lock);
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}
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template<typename T>
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void BlockingQueue<T>::cancel() {
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run_and_notify({
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cancelled = true;
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std::deque<T> t;
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deque.swap(t);
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})
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}
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