5c732d6324
It's a long-dead platform, and we don't have any way to build for, test, or maintain it, so there's no sense in doing acrobatics to support it. If you need Windows CE support, use SDL 1.2. If you need Windows Phone support, send SDL 2.0 patches for the newer Windows Mobile platform.
127 lines
3.2 KiB
C
Executable file
127 lines
3.2 KiB
C
Executable file
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_config.h"
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#ifdef SDL_TIMER_WINDOWS
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#include "../../core/windows/SDL_windows.h"
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#include <mmsystem.h>
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#include "SDL_timer.h"
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#define TIME_WRAP_VALUE (~(DWORD)0)
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/* The first (low-resolution) ticks value of the application */
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static DWORD start;
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#ifndef USE_GETTICKCOUNT
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/* Store if a high-resolution performance counter exists on the system */
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static BOOL hires_timer_available;
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/* The first high-resolution ticks value of the application */
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static LARGE_INTEGER hires_start_ticks;
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/* The number of ticks per second of the high-resolution performance counter */
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static LARGE_INTEGER hires_ticks_per_second;
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#endif
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void
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SDL_StartTicks(void)
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{
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/* Set first ticks value */
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#ifdef USE_GETTICKCOUNT
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start = GetTickCount();
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#else
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#if 0 /* Apparently there are problems with QPC on Win2K */
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if (QueryPerformanceFrequency(&hires_ticks_per_second) == TRUE) {
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hires_timer_available = TRUE;
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QueryPerformanceCounter(&hires_start_ticks);
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} else
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#endif
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{
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hires_timer_available = FALSE;
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timeBeginPeriod(1); /* use 1 ms timer precision */
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start = timeGetTime();
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}
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#endif
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}
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Uint32
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SDL_GetTicks(void)
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{
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DWORD now, ticks;
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#ifndef USE_GETTICKCOUNT
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LARGE_INTEGER hires_now;
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#endif
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#ifdef USE_GETTICKCOUNT
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now = GetTickCount();
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#else
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if (hires_timer_available) {
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QueryPerformanceCounter(&hires_now);
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hires_now.QuadPart -= hires_start_ticks.QuadPart;
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hires_now.QuadPart *= 1000;
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hires_now.QuadPart /= hires_ticks_per_second.QuadPart;
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return (DWORD) hires_now.QuadPart;
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} else {
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now = timeGetTime();
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}
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#endif
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if (now < start) {
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ticks = (TIME_WRAP_VALUE - start) + now;
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} else {
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ticks = (now - start);
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}
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return (ticks);
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}
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Uint64
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SDL_GetPerformanceCounter(void)
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{
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LARGE_INTEGER counter;
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if (!QueryPerformanceCounter(&counter)) {
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return SDL_GetTicks();
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}
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return counter.QuadPart;
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}
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Uint64
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SDL_GetPerformanceFrequency(void)
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{
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LARGE_INTEGER frequency;
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if (!QueryPerformanceFrequency(&frequency)) {
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return 1000;
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}
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return frequency.QuadPart;
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}
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void
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SDL_Delay(Uint32 ms)
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{
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Sleep(ms);
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}
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#endif /* SDL_TIMER_WINDOWS */
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/* vi: set ts=4 sw=4 expandtab: */
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