#ifndef __HIGHFREQCOUNTER_HPP__
#define __HIGHFREQCOUNTER_HPP__

/*
================================================================================

highFreqCounter.hpp

v. 0.5.1.a

© sam0delk1n, 2015



================================================================================
*/

#include <ctime>
#include <cstdint>

namespace boolean {

/*
================================================================================

highFreqCounter

================================================================================
*/
class highFreqCounter final {
public:
    const clockid_t                     clockid;

    auto                                begin( void ) noexcept ->void;
    auto                                end( void ) noexcept ->void;
    auto                                nsecGetTime( void ) const noexcept ->int64_t;

    auto                                operator=( const highFreqCounter& ) ->highFreqCounter& = delete;
    explicit                            highFreqCounter( const clockid_t clockid );
                                        highFreqCounter( const highFreqCounter& ) = delete;
                                        ~highFreqCounter( void ) = default;

private:
    int64_t                             nsecStartTime { 0 };
    int64_t                             nsecLastDeltaTime { 0 };
};

/*
================================================================================
highFreqCounter::begin
================================================================================
*/
inline auto highFreqCounter::begin( void ) noexcept ->void {
    timespec tspecStartTime;
    clock_gettime( clockid, &tspecStartTime );
    nsecStartTime = static_cast< int64_t >( tspecStartTime.tv_sec ) * 1000000000 + tspecStartTime.tv_nsec;
}

/*
================================================================================
highFreqCounter::end
================================================================================
*/
inline auto highFreqCounter::end( void ) noexcept ->void {
    timespec tspecEndTime;
    clock_gettime( clockid, &tspecEndTime );
    const int64_t nsecEndTime { static_cast< int64_t >( tspecEndTime.tv_sec ) * 1000000000 + tspecEndTime.tv_nsec };
    nsecLastDeltaTime = nsecEndTime - nsecStartTime;
}

/*
================================================================================
highFreqCounter::nsecGetTime
================================================================================
*/
inline auto highFreqCounter::nsecGetTime( void ) const noexcept ->int64_t {
    return nsecLastDeltaTime;
}

/*
================================================================================
highFreqCounter::highFreqCounter
================================================================================
*/
inline highFreqCounter::highFreqCounter( const clockid_t clockid ) :
clockid( clockid ) {}

}/*namespace boolean*/

#endif/*__HIGHFREQCOUNTER_HPP__*/