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// Copyright 2014 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.
#ifndef CONTENT_RENDERER_SCHEDULER_CANCELABLE_CLOSURE_HOLDER_H_
#define CONTENT_RENDERER_SCHEDULER_CANCELABLE_CLOSURE_HOLDER_H_
#include "base/cancelable_callback.h"
namespace content {
// A CancelableClosureHolder is a CancelableCallback which resets its wrapped
// callback with a cached closure whenever it is canceled.
class CancelableClosureHolder {
public:
CancelableClosureHolder();
~CancelableClosureHolder();
// Resets the closure to be wrapped by the cancelable callback. Cancels any
// outstanding callbacks.
void Reset(const base::Closure& callback);
// Cancels any outstanding closures returned by callback().
void Cancel();
// Returns a callback that will be disabled by calling Cancel(). Callback
// must have been set using Reset() before calling this function.
const base::Closure& callback() const;
private:
base::Closure callback_;
base::CancelableClosure cancelable_callback_;
DISALLOW_COPY_AND_ASSIGN(CancelableClosureHolder);
};
} // namespace content
#endif // CONTENT_RENDERER_SCHEDULER_CANCELABLE_CLOSURE_HOLDER_H_
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