// Copyright 2016 Google Inc. All Rights Reserved.

#ifndef WVCDM_PROFILER_PROFILED_SCOPE_H_
#define WVCDM_PROFILER_PROFILED_SCOPE_H_

#include <stdint.h>

#include "entry_writer.h"
#include "oem_functions.h"

namespace wvcdm {
namespace oemprofiler {

class ProfiledScope {
 public:
  explicit ProfiledScope(OEM_FUNCTION fid);
  explicit ProfiledScope(uint32_t sid, OEM_FUNCTION fid);
 ~ProfiledScope();

  EntryWriter meta_data_;

  // All profiling data must be assigned to a session but some oem
  // crypto calls are not associated with crypto sessions. To gather
  // those functions' data, the global session id is used. Crypto.Session
  // Ids are unsigned 32 bit integers. To use those as a profiling session
  // id but also allow for a global id that won't conflict with them,
  // we use a -1 as the a proifiling session id is a signed 64 bit integer.
  static const int64_t kGlobalSID = -1;

 private:
  int64_t sid_;
  OEM_FUNCTION fid_;

  uint64_t start_time_;

  void Submit(int64_t sid, uint64_t end_time) const;
  uint64_t GetNowUS() const;

  // disallow copy and assign
  ProfiledScope(const ProfiledScope&);
  void operator=(const ProfiledScope&);
};

} // namespace oemprofiler
} // namespace wvcdm
#endif