count_down_latch.cc

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#include "flutter/fml/synchronization/count_down_latch.h"
 
#include "flutter/fml/logging.h"
 
namespace fml {
 
CountDownLatch::CountDownLatch(size_t count) : count_(count) {
  if (count_ == 0) {
    waitable_event_.Signal();
  }
}
 
CountDownLatch::~CountDownLatch() = default;
 
void CountDownLatch::Wait() {
  waitable_event_.Wait();
}
 
void CountDownLatch::CountDown() {
  if (--count_ == 0) {
    waitable_event_.Signal();
  }
}
 
}  // namespace fml