36 lines
722 B
C++
36 lines
722 B
C++
#pragma once
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#include <mutex>
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#include <twist/stdlike/atomic.hpp>
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#include <wheels/logging/logging.hpp>
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namespace exe::support {
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class WaitGroup {
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public:
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explicit WaitGroup(uint32_t count = 0) : counter_(count) {
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}
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void Add() {
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zero_notifier_.store(0);
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counter_.fetch_add(1);
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}
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void Done() {
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if (counter_.fetch_sub(1) == 1) {
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zero_notifier_.fetch_add(1);
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zero_notifier_.notify_all();
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}
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}
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void Wait() {
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uint32_t old_zero_notifier = 0;
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while (counter_.load() != 0) {
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zero_notifier_.wait(old_zero_notifier);
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}
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}
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private:
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twist::stdlike::atomic<uint32_t> counter_{0};
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twist::stdlike::atomic<uint32_t> zero_notifier_{0};
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};
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} // namespace exe::support
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