1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_TRACE_EVENT_MEMORY_DUMP_SCHEDULER_H_
#define BASE_TRACE_EVENT_MEMORY_DUMP_SCHEDULER_H_
#include <stdint.h>
#include <vector>
#include "base/base_export.h"
#include "base/functional/callback.h"
#include "base/trace_event/memory_dump_request_args.h"
namespace base {
class SequencedTaskRunner;
namespace trace_event {
// Schedules global dump requests based on the triggers added. The methods of
// this class are NOT thread safe and the client has to take care of invoking
// all the methods of the class safely.
class BASE_EXPORT MemoryDumpScheduler {
public:
using PeriodicCallback = RepeatingCallback<void(MemoryDumpLevelOfDetail)>;
// Passed to Start().
struct BASE_EXPORT Config {
struct Trigger {
MemoryDumpLevelOfDetail level_of_detail;
uint32_t period_ms;
};
Config();
Config(const Config&);
~Config();
std::vector<Trigger> triggers;
PeriodicCallback callback;
};
static MemoryDumpScheduler* GetInstance();
MemoryDumpScheduler(const MemoryDumpScheduler&) = delete;
MemoryDumpScheduler& operator=(const MemoryDumpScheduler&) = delete;
void Start(Config, scoped_refptr<SequencedTaskRunner> task_runner);
void Stop();
bool is_enabled_for_testing() const { return bool(task_runner_); }
private:
friend class MemoryDumpSchedulerTest;
MemoryDumpScheduler();
~MemoryDumpScheduler();
void StartInternal(Config);
void StopInternal();
void Tick(uint32_t expected_generation);
// Accessed only by the public methods (never from the task runner itself).
scoped_refptr<SequencedTaskRunner> task_runner_;
// These fields instead are only accessed from within the task runner.
uint32_t period_ms_ = 0; // 0 == disabled.
// Used to invalidate outstanding tasks after Stop().
uint32_t generation_ = 0;
uint32_t tick_count_;
uint32_t light_dump_rate_;
uint32_t heavy_dump_rate_;
PeriodicCallback callback_;
};
} // namespace trace_event
} // namespace base
#endif // BASE_TRACE_EVENT_MEMORY_DUMP_SCHEDULER_H_
|
