Repo created

TMessagesProj/jni/voip/webrtc/base/task/task_observer.h

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+// 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_