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/*
* Copyright 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef HDR_PLUS_PROFILER_H
#define HDR_PLUS_PROFILER_H
#ifndef ENABLE_HDRPLUS_PROFILER
#define ENABLE_HDRPLUS_PROFILER 0
#endif
#if !ENABLE_HDRPLUS_PROFILER
// If profiler is not enabled, make every macro a noop
#define DECLARE_PROFILER_TIMER(_var, _description)
#define START_PROFILER_TIMER(_var) do {} while(0)
#define END_PROFILER_TIMER(_var) do {} while(0)
#define SCOPE_PROFILER_TIMER(_description) do {} while(0)
#else
#include <string>
/*
* Declare a profiler timer.
*
* _var is the variable that will be declared as a timer.
* _description is the description for this timer. It will be used when logging the timer duration.
*/
#define DECLARE_PROFILER_TIMER(_var, _description) pbcamera::TimerLogger _var = {_description}
/*
* Start a timer.
*
* _var is a timer declared with DECALRE_PROFILER_TIMER.
*/
#define START_PROFILER_TIMER(_var) ((_var).start())
/*
* End a timer and log the duration since last start.
*
* _var is a timer declared with DECALRE_PROFILER_TIMER.
*/
#define END_PROFILER_TIMER(_var) ((_var).end())
/*
* Declare a scope timer that starts now and ends when it goes out of scope.
*
* __description is the description for this timer. It will be used when logging the timer duration.
*/
#define SCOPE_PROFILER_TIMER(_description) pbcamera::ScopeTimerLogger _timer(_description)
namespace pbcamera {
#define TIMER_TAG "[PROFILE_TIMER]"
/**
* TimerLogger provides a timer to log the duration between start() and end().
*/
class TimerLogger {
public:
TimerLogger(const char *name) : mName(name), mInvalid(true) {};
// Start the timer.
void start() {
mInvalid = (clock_gettime(kClockId, &mStartTime) != 0);
}
// End the timer and log the duration since last start.
void end() {
if (mInvalid) {
ALOGE("%s <%s> start time is invalid.", TIMER_TAG, mName.c_str());
return;
}
struct timespec endTime;
mInvalid = (clock_gettime(kClockId, &endTime) != 0);
if (mInvalid) {
ALOGE("%s <%s> end time is invalid.", TIMER_TAG, mName.c_str());
return;
}
int64_t startNs = static_cast<int64_t>(mStartTime.tv_sec) * kNsPerSec + mStartTime.tv_nsec;
int64_t endNs = static_cast<int64_t>(endTime.tv_sec) * kNsPerSec + endTime.tv_nsec;
ALOGI("%s <%s> took %f ms.", TIMER_TAG, mName.c_str(),
static_cast<float>(endNs - startNs) / kNsPerMs);
}
private:
const static int64_t kNsPerSec = 1000000000;
const static int64_t kNsPerMs = 1000000;
const static clockid_t kClockId = CLOCK_BOOTTIME;
std::string mName;
struct timespec mStartTime;
bool mInvalid;
};
/**
* ScopeTimerLogger provides a timer to log the duration of the instance lifetime.
*/
class ScopeTimerLogger {
public:
ScopeTimerLogger(const char *name) : mTimerLogger(name) { mTimerLogger.start(); };
virtual ~ScopeTimerLogger() { mTimerLogger.end(); };
private:
TimerLogger mTimerLogger;
};
} // namespace pbcamera
#endif // !ENABLE_HDRPLUS_PROFILER
#endif // HDR_PLUS_PROFILER_H
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