File: callback_helpers.cc

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// Copyright 2013 The Chromium 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 "base/callback_helpers.h"

#include "base/callback.h"

namespace base {

ScopedClosureRunner::ScopedClosureRunner() {}

ScopedClosureRunner::ScopedClosureRunner(const Closure& closure)
    : closure_(closure) {}

ScopedClosureRunner::~ScopedClosureRunner() {
  if (!closure_.is_null())
    closure_.Run();
}

ScopedClosureRunner::ScopedClosureRunner(ScopedClosureRunner&& other)
    : closure_(other.Release()) {}

ScopedClosureRunner& ScopedClosureRunner::operator=(
    ScopedClosureRunner&& other) {
  ReplaceClosure(other.Release());
  return *this;
}

void ScopedClosureRunner::RunAndReset() {
  Closure old_closure = Release();
  if (!old_closure.is_null())
    old_closure.Run();
}

void ScopedClosureRunner::ReplaceClosure(const Closure& closure) {
  closure_ = closure;
}

Closure ScopedClosureRunner::Release() {
  Closure result = closure_;
  closure_.Reset();
  return result;
}

}  // namespace base