1/*
2 * Copyright 2016 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#ifndef SkATrace_DEFINED
9#define SkATrace_DEFINED
10
11#include "SkEventTracer.h"
12
13/**
14 * This class is used to support ATrace in android apps. It hooks into the SkEventTracer system. It
15 * currently supports the macros TRACE_EVENT*, TRACE_EVENT_INSTANT*, and TRACE_EVENT_BEGIN/END*.
16 * For versions of these calls that take additoinal args and value pairs we currently just drop them
17 * and report only the name. Since ATrace is a simple push and pop system (all traces are fully
18 * nested), if using BEGIN and END you should also make sure your calls are properly nested (i.e. if
19 * startA is before startB, then endB is before endA).
20 */
21class SkATrace : public SkEventTracer {
22public:
23    SkATrace();
24
25    SkEventTracer::Handle addTraceEvent(char phase,
26                                        const uint8_t* categoryEnabledFlag,
27                                        const char* name,
28                                        uint64_t id,
29                                        int numArgs,
30                                        const char** argNames,
31                                        const uint8_t* argTypes,
32                                        const uint64_t* argValues,
33                                        uint8_t flags) override;
34
35
36    void updateTraceEventDuration(const uint8_t* categoryEnabledFlag,
37                                  const char* name,
38                                  SkEventTracer::Handle handle) override;
39
40    const uint8_t* getCategoryGroupEnabled(const char* name) override;
41
42    const char* getCategoryGroupName(const uint8_t* categoryEnabledFlag) override {
43        static const char* category = "skiaATrace";
44        return category;
45    }
46
47private:
48    void (*fBeginSection)(const char*);
49    void (*fEndSection)(void);
50    bool (*fIsEnabled)(void);
51};
52
53#endif
54