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/*
* Copyright (C) 2012 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 BENCHMARKS_BENCHMARK_H_
#define BENCHMARKS_BENCHMARK_H_
#include <regex.h>
#include <stdint.h>
#include <string>
#include <vector>
namespace testing {
class Benchmark {
public:
Benchmark() {
List().push_back(this);
}
virtual ~Benchmark() {}
virtual std::string Name() = 0;
virtual size_t RunAllArgs(std::vector<regex_t*>&) = 0;
void SetBenchmarkBytesProcessed(uint64_t bytes) { bytes_processed_ += bytes; }
void StopBenchmarkTiming();
void StartBenchmarkTiming();
// Run all of the benchmarks that have registered.
static size_t RunAll(std::vector<regex_t*>&);
static std::vector<Benchmark*>& List();
static int MaxNameColumnWidth();
protected:
virtual size_t NameColumnWidth() = 0;
uint64_t bytes_processed_;
uint64_t total_time_ns_;
uint64_t start_time_ns_;
static bool header_printed_;
static void PrintHeader();
};
template <typename T>
class BenchmarkT : public Benchmark {
public:
BenchmarkT() {}
virtual ~BenchmarkT() {}
protected:
bool ShouldRun(std::vector<regex_t*>&, T arg);
void RunWithArg(T arg);
virtual void RunIterations(int, T) = 0;
virtual std::string GetNameStr(T) = 0;
};
class BenchmarkWithoutArg : public BenchmarkT<void*> {
public:
BenchmarkWithoutArg() {}
virtual ~BenchmarkWithoutArg() {}
protected:
virtual size_t RunAllArgs(std::vector<regex_t*>& regs) override {
size_t benchmarks_run = 0;
if (BenchmarkT<void*>::ShouldRun(regs, nullptr)) {
PrintHeader();
RunWithArg(nullptr);
benchmarks_run++;
}
return benchmarks_run;
}
virtual void RunIterations(int iters, void*) override {
Run(iters);
}
virtual void Run(int) = 0;
virtual size_t NameColumnWidth() override {
return Name().size();
}
virtual std::string GetNameStr(void *) override;
};
template<typename T>
class BenchmarkWithArg : public BenchmarkT<T> {
public:
BenchmarkWithArg() {}
virtual ~BenchmarkWithArg() {}
BenchmarkWithArg* Arg(T arg) {
args_.push_back(arg);
return this;
}
protected:
virtual size_t NameColumnWidth() override {
size_t max = 0;
for (const auto& arg : args_) {
max = std::max(max, GetNameStr(arg).size());
}
return max;
}
std::string GetNameStr(T arg) override;
virtual size_t RunAllArgs(std::vector<regex_t*>& regs) override {
size_t benchmarks_run = 0;
for (T& arg : args_) {
if (BenchmarkT<T>::ShouldRun(regs, arg)) {
Benchmark::PrintHeader();
BenchmarkT<T>::RunWithArg(arg);
benchmarks_run++;
}
}
return benchmarks_run;
}
virtual void RunIterations(int iters, T arg) override {
Run(iters, arg);
}
virtual void Run(int iters, T arg) = 0;
private:
std::vector<T> args_;
};
} // namespace testing
#define BENCHMARK_START(f, super_class) \
class f : public super_class { \
public: \
f() {} \
virtual ~f() {} \
virtual std::string Name() override { return #f; } \
#define BENCHMARK_NO_ARG(f) \
BENCHMARK_START(f, ::testing::BenchmarkWithoutArg) \
virtual void Run(int) override; \
}; \
static ::testing::Benchmark* __benchmark_##f = new f()
#define BENCHMARK_WITH_ARG(f, arg_type) \
BENCHMARK_START(f, ::testing::BenchmarkWithArg<arg_type>) \
virtual void Run(int, arg_type) override; \
}; \
static ::testing::BenchmarkWithArg<arg_type>* __benchmark_##f = (new f())
#endif // BENCHMARKS_BENCHMARK_H_
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