140 lines
3.3 KiB
C++
140 lines
3.3 KiB
C++
// hrtimer.cpp - written and placed in the public domain by Wei Dai
|
|
|
|
#include "pch.h"
|
|
#include "hrtimer.h"
|
|
#include "misc.h"
|
|
#include <stddef.h> // for NULL
|
|
#include <time.h>
|
|
|
|
#if defined(CRYPTOPP_WIN32_AVAILABLE)
|
|
#include <windows.h>
|
|
#elif defined(CRYPTOPP_UNIX_AVAILABLE)
|
|
#include <sys/time.h>
|
|
#include <sys/times.h>
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#include <assert.h>
|
|
|
|
NAMESPACE_BEGIN(CryptoPP)
|
|
|
|
#ifndef CRYPTOPP_IMPORTS
|
|
|
|
double TimerBase::ConvertTo(TimerWord t, Unit unit)
|
|
{
|
|
static unsigned long unitsPerSecondTable[] = {1, 1000, 1000*1000, 1000*1000*1000};
|
|
|
|
assert(unit < sizeof(unitsPerSecondTable) / sizeof(unitsPerSecondTable[0]));
|
|
return (double)CRYPTOPP_VC6_INT64 t * unitsPerSecondTable[unit] / CRYPTOPP_VC6_INT64 TicksPerSecond();
|
|
}
|
|
|
|
void TimerBase::StartTimer()
|
|
{
|
|
m_last = m_start = GetCurrentTimerValue();
|
|
m_started = true;
|
|
}
|
|
|
|
double TimerBase::ElapsedTimeAsDouble()
|
|
{
|
|
if (m_stuckAtZero)
|
|
return 0;
|
|
|
|
if (m_started)
|
|
{
|
|
TimerWord now = GetCurrentTimerValue();
|
|
if (m_last < now) // protect against OS bugs where time goes backwards
|
|
m_last = now;
|
|
return ConvertTo(m_last - m_start, m_timerUnit);
|
|
}
|
|
|
|
StartTimer();
|
|
return 0;
|
|
}
|
|
|
|
unsigned long TimerBase::ElapsedTime()
|
|
{
|
|
double elapsed = ElapsedTimeAsDouble();
|
|
assert(elapsed <= ULONG_MAX);
|
|
return (unsigned long)elapsed;
|
|
}
|
|
|
|
TimerWord Timer::GetCurrentTimerValue()
|
|
{
|
|
#if defined(CRYPTOPP_WIN32_AVAILABLE)
|
|
LARGE_INTEGER now;
|
|
if (!QueryPerformanceCounter(&now))
|
|
throw Exception(Exception::OTHER_ERROR, "Timer: QueryPerformanceCounter failed with error " + IntToString(GetLastError()));
|
|
return now.QuadPart;
|
|
#elif defined(CRYPTOPP_UNIX_AVAILABLE)
|
|
timeval now;
|
|
gettimeofday(&now, NULL);
|
|
return (TimerWord)now.tv_sec * 1000000 + now.tv_usec;
|
|
#else
|
|
clock_t now;
|
|
return clock();
|
|
#endif
|
|
}
|
|
|
|
TimerWord Timer::TicksPerSecond()
|
|
{
|
|
#if defined(CRYPTOPP_WIN32_AVAILABLE)
|
|
static LARGE_INTEGER freq = {0};
|
|
if (freq.QuadPart == 0)
|
|
{
|
|
if (!QueryPerformanceFrequency(&freq))
|
|
throw Exception(Exception::OTHER_ERROR, "Timer: QueryPerformanceFrequency failed with error " + IntToString(GetLastError()));
|
|
}
|
|
return freq.QuadPart;
|
|
#elif defined(CRYPTOPP_UNIX_AVAILABLE)
|
|
return 1000000;
|
|
#else
|
|
return CLOCKS_PER_SEC;
|
|
#endif
|
|
}
|
|
|
|
#endif // #ifndef CRYPTOPP_IMPORTS
|
|
|
|
TimerWord ThreadUserTimer::GetCurrentTimerValue()
|
|
{
|
|
#if defined(CRYPTOPP_WIN32_AVAILABLE)
|
|
static bool getCurrentThreadImplemented = true;
|
|
if (getCurrentThreadImplemented)
|
|
{
|
|
FILETIME now, ignored;
|
|
if (!GetThreadTimes(GetCurrentThread(), &ignored, &ignored, &ignored, &now))
|
|
{
|
|
DWORD lastError = GetLastError();
|
|
if (lastError == ERROR_CALL_NOT_IMPLEMENTED)
|
|
{
|
|
getCurrentThreadImplemented = false;
|
|
goto GetCurrentThreadNotImplemented;
|
|
}
|
|
throw Exception(Exception::OTHER_ERROR, "ThreadUserTimer: GetThreadTimes failed with error " + IntToString(lastError));
|
|
}
|
|
return now.dwLowDateTime + ((TimerWord)now.dwHighDateTime << 32);
|
|
}
|
|
GetCurrentThreadNotImplemented:
|
|
return (TimerWord)clock() * (10*1000*1000 / CLOCKS_PER_SEC);
|
|
#elif defined(CRYPTOPP_UNIX_AVAILABLE)
|
|
tms now;
|
|
times(&now);
|
|
return now.tms_utime;
|
|
#else
|
|
return clock();
|
|
#endif
|
|
}
|
|
|
|
TimerWord ThreadUserTimer::TicksPerSecond()
|
|
{
|
|
#if defined(CRYPTOPP_WIN32_AVAILABLE)
|
|
return 10*1000*1000;
|
|
#elif defined(CRYPTOPP_UNIX_AVAILABLE)
|
|
static const long ticksPerSecond = sysconf(_SC_CLK_TCK);
|
|
return ticksPerSecond;
|
|
#else
|
|
return CLOCKS_PER_SEC;
|
|
#endif
|
|
}
|
|
|
|
NAMESPACE_END
|