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/*
* 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 "SkEventTracer.h"
/**
* 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 TRANCE_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* category = "skiaATrace";
return category;
}
private:
void (*fBeginSection)(const char*);
void (*fEndSection)(void);
bool (*fIsEnabled)(void);
};
#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
#include <utils/Trace.h>
#define ATRACE_ANDROID_FRAMEWORK(fmt, ...) SkAndroidTraceUtil __trace = \
(SkAndroidTraceUtil::atraceFormatBegin(fmt, ##__VA_ARGS__), SkAndroidTraceUtil())
class SkAndroidTraceUtil {
public:
~SkAndroidTraceUtil() { ATRACE_END(); }
static void atraceFormatBegin(const char* fmt, ...) {
if (CC_LIKELY(!ATRACE_ENABLED())) return;
const int BUFFER_SIZE = 256;
va_list ap;
char buf[BUFFER_SIZE];
va_start(ap, fmt);
vsnprintf(buf, BUFFER_SIZE, fmt, ap);
va_end(ap);
ATRACE_BEGIN(buf);
}
};
#else
#define ATRACE_ANDROID_FRAMEWORK(fmt, ...)
#endif // SK_BUILD_FOR_ANDROID_FRAMEWORK
#endif
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