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 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 24 updateTraceEventDuration(const uint8_t* categoryEnabledFlag, 25 const char* name, 26 SkEventTracer::Handle handle) SK_OVERRIDE {}; 27 28 virtual const uint8_t* getCategoryGroupEnabled(const char* name) SK_OVERRIDE { 29 static uint8_t no = 0; 30 return &no; 31 }; 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 41 static void cleanup_tracer() { 42 // calling SetInstance will delete the existing instance. 43 SkEventTracer::SetInstance(NULL); 44 } 45 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 54 SkEventTracer* SkEventTracer::GetInstance() { 55 SK_DECLARE_STATIC_ONCE(once); 56 SkOnce(&once, intialize_default_tracer, SkEventTracer::gInstance); 57 SkASSERT(SkEventTracer::gInstance); 58 return SkEventTracer::gInstance; 59 } 60
