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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// -*- mode: C++ -*-
//
// Copyright 2021-2023 Google LLC
//
// Licensed under the Apache License v2.0 with LLVM Exceptions (the
// "License"); you may not use this file except in compliance with the
// License. You may obtain a copy of the License at
//
// https://llvm.org/LICENSE.txt
//
// 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.
//
// Author: Giuliano Procida
#ifndef STG_RUNTIME_H_
#define STG_RUNTIME_H_
#include <cstddef>
#include <cstdint>
#include <ctime>
#include <map>
#include <ostream>
namespace stg {
struct Nanoseconds {
explicit Nanoseconds(uint64_t ns) : ns(ns) {}
uint64_t ns;
};
struct Frequencies {
std::map<size_t, size_t> counts;
};
struct Runtime {
Runtime(std::ostream& output, bool print_metrics)
: output(output), print_metrics(print_metrics) {}
template <typename V>
void PrintMetric(const char* name, const V& value) {
if (print_metrics) {
output << name << ": " << value << '\n';
}
}
std::ostream& output;
bool print_metrics;
};
// These objects only record values on destruction, so scope them!
class Time {
public:
Time(Runtime& runtime, const char* name);
Time(Time&& other) = delete;
Time& operator=(Time&& other) = delete;
~Time();
private:
Runtime& runtime_;
const char* name_;
struct timespec start_;
};
class Counter {
public:
Counter(Runtime& runtime, const char* name);
Counter(Counter&& other) = delete;
Counter& operator=(Counter&& other) = delete;
~Counter();
Counter& operator=(size_t x) {
value_ = x;
return *this;
}
Counter& operator+=(size_t x) {
value_ += x;
return *this;
}
Counter& operator++() {
++value_;
return *this;
}
private:
Runtime& runtime_;
const char* name_;
size_t value_;
};
class Histogram {
public:
Histogram(Runtime& runtime, const char* name);
Histogram(Histogram&& other) = delete;
Histogram& operator=(Histogram&& other) = delete;
~Histogram();
void Add(size_t item) {
++frequencies_.counts[item];
}
private:
Runtime& runtime_;
const char* name_;
Frequencies frequencies_;
};
} // namespace stg
#endif // STG_RUNTIME_H_
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