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46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
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// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_DEBUG_TASK_ANNOTATOR_H_
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#define BASE_DEBUG_TASK_ANNOTATOR_H_
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#include <stdint.h>
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#include "base/base_export.h"
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#include "base/macros.h"
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namespace base {
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struct PendingTask;
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namespace debug {
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// Implements common debug annotations for posted tasks. This includes data
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// such as task origins, queueing durations and memory usage.
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class BASE_EXPORT TaskAnnotator {
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public:
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TaskAnnotator();
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~TaskAnnotator();
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// Called to indicate that a task has been queued to run in the future.
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// |queue_function| is used as the trace flow event name.
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void DidQueueTask(const char* queue_function,
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const PendingTask& pending_task);
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// Run a previously queued task. |queue_function| should match what was
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// passed into |DidQueueTask| for this task.
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void RunTask(const char* queue_function, PendingTask* pending_task);
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private:
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// Creates a process-wide unique ID to represent this task in trace events.
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// This will be mangled with a Process ID hash to reduce the likelyhood of
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// colliding with TaskAnnotator pointers on other processes.
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uint64_t GetTaskTraceID(const PendingTask& task) const;
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DISALLOW_COPY_AND_ASSIGN(TaskAnnotator);
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};
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} // namespace debug
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} // namespace base
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#endif // BASE_DEBUG_TASK_ANNOTATOR_H_
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