diff options
Diffstat (limited to 'src/3rdparty/javascriptcore/JavaScriptCore/wtf/CurrentTime.cpp')
-rw-r--r-- | src/3rdparty/javascriptcore/JavaScriptCore/wtf/CurrentTime.cpp | 65 |
1 files changed, 61 insertions, 4 deletions
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/CurrentTime.cpp b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/CurrentTime.cpp index 73c2c5c852..a3d52906e2 100644 --- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/CurrentTime.cpp +++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/CurrentTime.cpp @@ -1,6 +1,7 @@ /* * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. * Copyright (C) 2008 Google Inc. All rights reserved. + * Copyright (C) 2007-2009 Torch Mobile, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are @@ -33,6 +34,7 @@ #include "CurrentTime.h" #if PLATFORM(WIN_OS) + // Windows is first since we want to use hires timers, despite PLATFORM(CF) // being defined. // If defined, WIN32_LEAN_AND_MEAN disables timeBeginPeriod/timeEndPeriod. @@ -40,13 +42,17 @@ #include <windows.h> #include <math.h> #include <stdint.h> -#if HAVE(SYS_TIMEB_H) +#include <time.h> + +#if USE(QUERY_PERFORMANCE_COUNTER) +#if PLATFORM(WINCE) +extern "C" time_t mktime(struct tm *t); +#else #include <sys/timeb.h> -#endif -#if !PLATFORM(WINCE) #include <sys/types.h> #endif -#include <time.h> +#endif + #elif PLATFORM(CF) #include <CoreFoundation/CFDate.h> #elif PLATFORM(GTK) @@ -63,6 +69,8 @@ const double msPerSecond = 1000.0; #if PLATFORM(WIN_OS) +#if USE(QUERY_PERFORMANCE_COUNTER) + static LARGE_INTEGER qpcFrequency; static bool syncedTime; @@ -188,6 +196,55 @@ double currentTime() return utc / 1000.0; } +#else + +static double currentSystemTime() +{ + FILETIME ft; + GetCurrentFT(&ft); + + // As per Windows documentation for FILETIME, copy the resulting FILETIME structure to a + // ULARGE_INTEGER structure using memcpy (using memcpy instead of direct assignment can + // prevent alignment faults on 64-bit Windows). + + ULARGE_INTEGER t; + memcpy(&t, &ft, sizeof(t)); + + // Windows file times are in 100s of nanoseconds. + // To convert to seconds, we have to divide by 10,000,000, which is more quickly + // done by multiplying by 0.0000001. + + // Between January 1, 1601 and January 1, 1970, there were 369 complete years, + // of which 89 were leap years (1700, 1800, and 1900 were not leap years). + // That is a total of 134774 days, which is 11644473600 seconds. + + return t.QuadPart * 0.0000001 - 11644473600.0; +} + +double currentTime() +{ + static bool init = false; + static double lastTime; + static DWORD lastTickCount; + if (!init) { + lastTime = currentSystemTime(); + lastTickCount = GetTickCount(); + init = true; + return lastTime; + } + + DWORD tickCountNow = GetTickCount(); + DWORD elapsed = tickCountNow - lastTickCount; + double timeNow = lastTime + (double)elapsed / 1000.; + if (elapsed >= 0x7FFFFFFF) { + lastTime = timeNow; + lastTickCount = tickCountNow; + } + return timeNow; +} + +#endif // USE(QUERY_PERFORMANCE_COUNTER) + #elif PLATFORM(CF) double currentTime() |