/* * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include "SystemTime.h" #include namespace WebCore { double currentTime() { FILETIME ft; GetSystemTimeAsFileTime(&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; } }