/*
* Copyright 2016 Google Inc .
*
* Use of this source code is governed by a BSD - style license that can be
* found in the LICENSE file .
*/
#ifndef SkATrace_DEFINED
#define SkATrace_DEFINED
#include "include/utils/SkEventTracer.h"
#include <cstdint>
/**
* This class is used to support ATrace in android apps . It hooks into the SkEventTracer system . It
* currently supports the macros TRACE_EVENT * , TRACE_EVENT_INSTANT * , and TRACE_EVENT_BEGIN / END * .
* For versions of these calls that take additoinal args and value pairs we currently just drop them
* and report only the name . Since ATrace is a simple push and pop system ( all traces are fully
* nested ) , if using BEGIN and END you should also make sure your calls are properly nested ( i . e . if
* startA is before startB , then endB is before endA ) .
*/
class SkATrace : public SkEventTracer {
public:
SkATrace();
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) override;
void updateTraceEventDuration(const uint8_t* categoryEnabledFlag,
const char * name,
SkEventTracer::Handle handle) override;
const uint8_t* getCategoryGroupEnabled(const char * name) override;
const char * getCategoryGroupName(const uint8_t* categoryEnabledFlag) override {
static const char * const category = "skiaATrace" ;
return category;
}
// Atrace does not yet support splitting up trace output into sections.
void newTracingSection(const char * name) override {}
private :
SkATrace(const SkATrace&) = delete ;
SkATrace& operator =(const SkATrace&) = delete ;
void (*fBeginSection)(const char *);
void (*fEndSection)(void );
bool (*fIsEnabled)(void );
};
#endif
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