Profiler.hpp

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#pragma once
 
#include <chrono>
#include <map>
#include <mutex>
#include <string>
#include <thread>
 
namespace shkyera {
 
struct ProfileBlock {
  double totalLengthInNanoSeconds = 0;
  size_t numberOfCalls = 0;
 
  ProfileBlock& operator+=(const ProfileBlock& other);
};
 
class ProfileGuard {
 public:
  ProfileGuard(std::string&& name);
  ~ProfileGuard();
 
 private:
  std::string mProfileName;
  std::chrono::high_resolution_clock::time_point mStartTime;
};
 
class Profiler {
 public:
  using BlocksPerThread = std::map<std::thread::id, std::map<std::string, ProfileBlock>>;
 
  static Profiler& getInstance();
 
  void clear();
  void addBlock(std::string&& name, std::chrono::nanoseconds time);
  BlocksPerThread getProfiles();
 
 private:
  Profiler() = default;
 
  std::mutex mMutex;
  BlocksPerThread mProfileBlocks;
};
 
#define SHKYERA_PROFILE(name) ProfileGuard __SHKYERA_UNIQUE_NAME(__LINE__)(name)
#define SHKYERA_READ_PROFILE Profiler::getInstance().getProfiles()
#define SHKYERA_CLEAR_PROFILE Profiler::getInstance().clear()
 
#define __SHKYERA_UNIQUE_NAME(LINE) __SHKYERA_CONCAT(profileGuard_, LINE)
#define __SHKYERA_CONCAT(X, Y) __SHKYERA_CONCAT_IMPL(X, Y)
#define __SHKYERA_CONCAT_IMPL(X, Y) X##Y
 
}  // namespace shkyera