diff options
Diffstat (limited to 'plugins/CryptoPP/crypto/src/hrtimer.cpp')
| -rw-r--r-- | plugins/CryptoPP/crypto/src/hrtimer.cpp | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/plugins/CryptoPP/crypto/src/hrtimer.cpp b/plugins/CryptoPP/crypto/src/hrtimer.cpp new file mode 100644 index 0000000000..4a1cc79ec5 --- /dev/null +++ b/plugins/CryptoPP/crypto/src/hrtimer.cpp @@ -0,0 +1,139 @@ +// 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
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