timer.h

/*
 * SPDX-FileCopyrightText: 2023 The P4 Language Consortium
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef LIB_TIMER_H_
#define LIB_TIMER_H_
 
#include <cstddef>
#include <cstdint>
#include <functional>
#include <memory>
#include <string>
#include <vector>
 
namespace P4::Util {

void withTimer(const char *timerName, const std::function<void()> &fn);
 
struct TimerEntry {
    std::string timerName;
    size_t milliseconds;
    float relativeToParent;
    uint64_t invocations;
};

std::vector<TimerEntry> getTimers();
 
// Internal implementation.
struct ScopedTimerCtx;

class ScopedTimer {
 public:
    explicit ScopedTimer(const char *name);
    ScopedTimer(const ScopedTimer &) = delete;
    ~ScopedTimer();
 
 private:
    std::unique_ptr<ScopedTimerCtx> ctx;
};
 
}  // namespace P4::Util
 
#endif /* LIB_TIMER_H_ */