46 lines
813 B
C++
46 lines
813 B
C++
#pragma once
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#include <condition_variable>
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#include <mutex>
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#include <optional>
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#include <queue>
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namespace th_safe {
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template <typename T> class queue {
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public:
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void push(const T &value) {
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{
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std::lock_guard lock(mutex_);
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queue_.push(value);
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}
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cond_var_.notify_one();
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}
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std::optional<T> pop() {
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std::unique_lock lock(mutex_);
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cond_var_.wait(lock, [this] { return !queue_.empty() || done_; });
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if (queue_.empty())
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return std::nullopt;
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T value = queue_.front();
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queue_.pop();
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return value;
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}
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void done() {
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{
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std::lock_guard lock(mutex_);
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done_ = true;
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}
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cond_var_.notify_all();
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}
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private:
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std::queue<T> queue_;
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std::mutex mutex_;
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std::condition_variable cond_var_;
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bool done_ = false;
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};
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} // namespace th_safe
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