From 52a5a370fd394585d4bbf69d4a637bf92bd5878d Mon Sep 17 00:00:00 2001 From: Jon Lund Steffensen Date: Thu, 6 May 2010 23:56:52 +0200 Subject: systemtime.c: Portably read current time on posix and windows. w32gdi.c: Implements gamma ramp method for Windows GDI API. Use double as a cross platform time representation. Add WinGDI as a selectable method (currently limitied to minimum 4500K). Fix a bug where redshift would crash if RANDR failed and VidMode wasn't compiled in. --- src/systemtime.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 src/systemtime.c (limited to 'src/systemtime.c') diff --git a/src/systemtime.c b/src/systemtime.c new file mode 100644 index 0000000..abbb5ae --- /dev/null +++ b/src/systemtime.c @@ -0,0 +1,52 @@ +/* systemtime.c -- Portable system time source + This file is part of Redshift. + + Redshift is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Redshift is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with Redshift. If not, see . + + Copyright (c) 2010 Jon Lund Steffensen +*/ + +#include + +#ifndef _WIN32 +# include +#endif + +#include "systemtime.h" + +int +systemtime_get_time(double *t) +{ +#ifndef _WIN32 + struct timespec now; + int r = clock_gettime(CLOCK_REALTIME, &now); + if (r < 0) { + perror("clock_gettime"); + return -1; + } + + *t = now.tv_sec + (now.tv_nsec / 1000000000.0); +#else /* _WIN32 */ + FILETIME now; + ULARGE_INTEGER i; + GetSystemTimeAsFileTime(&now); + i.LowPart = now.dwLowDateTime; + i.HighPart = now.dwHighDateTime; + + /* FILETIME is tenths of microseconds since 1601-01-01 UTC */ + *t = (i.QuadPart / 10000000.0) - 11644473600.0; +#endif /* _WIN32 */ + + return 0; +} -- cgit v1.2.3-70-g09d2