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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_SCHEDULER_COMMON_CANCELABLE_CLOSURE_HOLDER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_SCHEDULER_COMMON_CANCELABLE_CLOSURE_HOLDER_H_
#include "base/cancelable_callback.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
namespace blink {
namespace scheduler {
// A CancelableClosureHolder is a CancelableRepeatingClosure which resets its
// wrapped callback with a cached closure whenever it is canceled.
class CancelableClosureHolder {
DISALLOW_NEW();
public:
CancelableClosureHolder();
CancelableClosureHolder(const CancelableClosureHolder&) = delete;
CancelableClosureHolder& operator=(const CancelableClosureHolder&) = delete;
~CancelableClosureHolder();
// Resets the closure to be wrapped by the cancelable callback. Cancels any
// outstanding callbacks.
void Reset(const base::RepeatingClosure& 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.
base::RepeatingClosure GetCallback() const;
private:
base::RepeatingClosure callback_;
base::CancelableRepeatingClosure cancelable_callback_;
};
} // namespace scheduler
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_SCHEDULER_COMMON_CANCELABLE_CLOSURE_HOLDER_H_
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