diff options
Diffstat (limited to 'distrib/sdl-1.2.12/src/timer/win32/SDL_systimer.c')
| -rw-r--r-- | distrib/sdl-1.2.12/src/timer/win32/SDL_systimer.c | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/distrib/sdl-1.2.12/src/timer/win32/SDL_systimer.c b/distrib/sdl-1.2.12/src/timer/win32/SDL_systimer.c deleted file mode 100644 index 4a24d13..0000000 --- a/distrib/sdl-1.2.12/src/timer/win32/SDL_systimer.c +++ /dev/null @@ -1,160 +0,0 @@ -/* - SDL - Simple DirectMedia Layer - Copyright (C) 1997-2006 Sam Lantinga - - This library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - This library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with this library; if not, write to the Free Software - Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - - Sam Lantinga - slouken@libsdl.org -*/ -#include "SDL_config.h" - -#ifdef SDL_TIMER_WIN32 - -#define WIN32_LEAN_AND_MEAN -#include <windows.h> -#include <mmsystem.h> - -#include "SDL_timer.h" -#include "../SDL_timer_c.h" - -#ifdef _WIN32_WCE - #error This is WinCE. Please use src/timer/wince/SDL_systimer.c instead. -#endif - -#define TIME_WRAP_VALUE (~(DWORD)0) - -/* The first (low-resolution) ticks value of the application */ -static DWORD start; - -#ifndef USE_GETTICKCOUNT -/* Store if a high-resolution performance counter exists on the system */ -static BOOL hires_timer_available; -/* The first high-resolution ticks value of the application */ -static LARGE_INTEGER hires_start_ticks; -/* The number of ticks per second of the high-resolution performance counter */ -static LARGE_INTEGER hires_ticks_per_second; -#endif - -void SDL_StartTicks(void) -{ - /* Set first ticks value */ -#ifdef USE_GETTICKCOUNT - start = GetTickCount(); -#else -#if 0 /* Apparently there are problems with QPC on Win2K */ - if (QueryPerformanceFrequency(&hires_ticks_per_second) == TRUE) - { - hires_timer_available = TRUE; - QueryPerformanceCounter(&hires_start_ticks); - } - else -#endif - { - hires_timer_available = FALSE; - timeBeginPeriod(1); /* use 1 ms timer precision */ - start = timeGetTime(); - } -#endif -} - -Uint32 SDL_GetTicks(void) -{ - DWORD now, ticks; -#ifndef USE_GETTICKCOUNT - LARGE_INTEGER hires_now; -#endif - -#ifdef USE_GETTICKCOUNT - now = GetTickCount(); -#else - if (hires_timer_available) - { - QueryPerformanceCounter(&hires_now); - - hires_now.QuadPart -= hires_start_ticks.QuadPart; - hires_now.QuadPart *= 1000; - hires_now.QuadPart /= hires_ticks_per_second.QuadPart; - - return (DWORD)hires_now.QuadPart; - } - else - { - now = timeGetTime(); - } -#endif - - if ( now < start ) { - ticks = (TIME_WRAP_VALUE-start) + now; - } else { - ticks = (now - start); - } - return(ticks); -} - -void SDL_Delay(Uint32 ms) -{ - Sleep(ms); -} - -/* Data to handle a single periodic alarm */ -static UINT timerID = 0; - -static void CALLBACK HandleAlarm(UINT uID, UINT uMsg, DWORD_PTR dwUser, - DWORD_PTR dw1, DWORD_PTR dw2) -{ - SDL_ThreadedTimerCheck(); -} - - -int SDL_SYS_TimerInit(void) -{ - MMRESULT result; - - /* Set timer resolution */ - result = timeBeginPeriod(TIMER_RESOLUTION); - if ( result != TIMERR_NOERROR ) { - SDL_SetError("Warning: Can't set %d ms timer resolution", - TIMER_RESOLUTION); - } - /* Allow 10 ms of drift so we don't chew on CPU */ - timerID = timeSetEvent(TIMER_RESOLUTION,1,HandleAlarm,0,TIME_PERIODIC); - if ( ! timerID ) { - SDL_SetError("timeSetEvent() failed"); - return(-1); - } - return(SDL_SetTimerThreaded(1)); -} - -void SDL_SYS_TimerQuit(void) -{ - if ( timerID ) { - timeKillEvent(timerID); - } - timeEndPeriod(TIMER_RESOLUTION); -} - -int SDL_SYS_StartTimer(void) -{ - SDL_SetError("Internal logic error: Win32 uses threaded timer"); - return(-1); -} - -void SDL_SYS_StopTimer(void) -{ - return; -} - -#endif /* SDL_TIMER_WIN32 */ |