1 /*
2 * Copyright 2014 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 #include "SkEventTracer.h"
9 #include "SkOnce.h"
10
11 class SkDefaultEventTracer: public SkEventTracer {
12 virtual SkEventTracer::Handle
addTraceEvent(char phase,const uint8_t * categoryEnabledFlag,const char * name,uint64_t id,int numArgs,const char ** argNames,const uint8_t * argTypes,const uint64_t * argValues,uint8_t flags)13 addTraceEvent(char phase,
14 const uint8_t* categoryEnabledFlag,
15 const char* name,
16 uint64_t id,
17 int numArgs,
18 const char** argNames,
19 const uint8_t* argTypes,
20 const uint64_t* argValues,
21 uint8_t flags) SK_OVERRIDE { return 0; }
22
23 virtual void
updateTraceEventDuration(const uint8_t * categoryEnabledFlag,const char * name,SkEventTracer::Handle handle)24 updateTraceEventDuration(const uint8_t* categoryEnabledFlag,
25 const char* name,
26 SkEventTracer::Handle handle) SK_OVERRIDE {};
27
getCategoryGroupEnabled(const char * name)28 virtual const uint8_t* getCategoryGroupEnabled(const char* name) SK_OVERRIDE {
29 static uint8_t no = 0;
30 return &no;
31 };
getCategoryGroupName(const uint8_t * categoryEnabledFlag)32 virtual const char* getCategoryGroupName(
33 const uint8_t* categoryEnabledFlag) SK_OVERRIDE {
34 static const char* dummy = "dummy";
35 return dummy;
36 };
37 };
38
39 SkEventTracer* SkEventTracer::gInstance;
40
cleanup_tracer()41 static void cleanup_tracer() {
42 // calling SetInstance will delete the existing instance.
43 SkEventTracer::SetInstance(NULL);
44 }
45
intialize_default_tracer(SkEventTracer * current_instance)46 static void intialize_default_tracer(SkEventTracer* current_instance) {
47 if (NULL == current_instance) {
48 SkEventTracer::SetInstance(SkNEW(SkDefaultEventTracer));
49 }
50 atexit(cleanup_tracer);
51 }
52
53
GetInstance()54 SkEventTracer* SkEventTracer::GetInstance() {
55 SK_DECLARE_STATIC_ONCE(once);
56 SkOnce(&once, intialize_default_tracer, SkEventTracer::gInstance);
57 SkASSERT(NULL != SkEventTracer::gInstance);
58 return SkEventTracer::gInstance;
59 }
60