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77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
// Copyright 2017 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_TRACE_EVENT_MEMORY_DUMP_SCHEDULER_H
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#define BASE_TRACE_EVENT_MEMORY_DUMP_SCHEDULER_H
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#include <stdint.h>
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#include <vector>
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#include "base/base_export.h"
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#include "base/callback.h"
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#include "base/memory/ref_counted.h"
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#include "base/trace_event/memory_dump_request_args.h"
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namespace base {
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class SequencedTaskRunner;
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namespace trace_event {
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// Schedules global dump requests based on the triggers added. The methods of
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// this class are NOT thread safe and the client has to take care of invoking
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// all the methods of the class safely.
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class BASE_EXPORT MemoryDumpScheduler {
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public:
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using PeriodicCallback = RepeatingCallback<void(MemoryDumpLevelOfDetail)>;
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// Passed to Start().
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struct BASE_EXPORT Config {
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struct Trigger {
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MemoryDumpLevelOfDetail level_of_detail;
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uint32_t period_ms;
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};
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Config();
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Config(const Config&);
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~Config();
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std::vector<Trigger> triggers;
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PeriodicCallback callback;
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};
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static MemoryDumpScheduler* GetInstance();
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void Start(Config, scoped_refptr<SequencedTaskRunner> task_runner);
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void Stop();
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bool is_enabled_for_testing() const { return bool(task_runner_); }
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private:
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friend class MemoryDumpSchedulerTest;
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MemoryDumpScheduler();
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~MemoryDumpScheduler();
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void StartInternal(Config);
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void StopInternal();
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void Tick(uint32_t expected_generation);
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// Accessed only by the public methods (never from the task runner itself).
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scoped_refptr<SequencedTaskRunner> task_runner_;
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// These fields instead are only accessed from within the task runner.
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uint32_t period_ms_; // 0 == disabled.
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uint32_t generation_; // Used to invalidate outstanding tasks after Stop().
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uint32_t tick_count_;
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uint32_t light_dump_rate_;
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uint32_t heavy_dump_rate_;
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PeriodicCallback callback_;
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DISALLOW_COPY_AND_ASSIGN(MemoryDumpScheduler);
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};
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} // namespace trace_event
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} // namespace base
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#endif // BASE_TRACE_EVENT_MEMORY_DUMP_SCHEDULER_H
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