36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
|
// Copyright 2018 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 BASE_TASK_TASK_OBSERVER_H_
|
||
|
#define BASE_TASK_TASK_OBSERVER_H_
|
||
|
|
||
|
#include "base/base_export.h"
|
||
|
#include "base/pending_task.h"
|
||
|
|
||
|
namespace base {
|
||
|
|
||
|
// A TaskObserver is an object that receives notifications about tasks being
|
||
|
// processed on the thread it's associated with.
|
||
|
//
|
||
|
// NOTE: A TaskObserver implementation should be extremely fast!
|
||
|
|
||
|
class BASE_EXPORT TaskObserver {
|
||
|
public:
|
||
|
// This method is called before processing a task.
|
||
|
// |was_blocked_or_low_priority| indicates if the task was at some point in a
|
||
|
// queue that was blocked or less important than "normal".
|
||
|
virtual void WillProcessTask(const PendingTask& pending_task,
|
||
|
bool was_blocked_or_low_priority) = 0;
|
||
|
|
||
|
// This method is called after processing a task.
|
||
|
virtual void DidProcessTask(const PendingTask& pending_task) = 0;
|
||
|
|
||
|
protected:
|
||
|
virtual ~TaskObserver() = default;
|
||
|
};
|
||
|
|
||
|
} // namespace base
|
||
|
|
||
|
#endif // BASE_TASK_TASK_OBSERVER_H_
|