kc3-lang/SDL/src/timer/beos/SDL_systimer.c

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• Hash : e187810e
  Author :
  Date : 2013-08-17T18:07:29
  

  auto init the ticks if the GetTicks and the like methods are called before SDL_Init().. This prevents annoying game bugs such as caching SDL_GetPerformanceFrequency in a static initializer

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• src/timer/beos/SDL_systimer.c

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
  
    This software is provided 'as-is', without any express or implied
    warranty.  In no event will the authors be held liable for any damages
    arising from the use of this software.
  
    Permission is granted to anyone to use this software for any purpose,
    including commercial applications, and to alter it and redistribute it
    freely, subject to the following restrictions:
  
    1. The origin of this software must not be misrepresented; you must not
       claim that you wrote the original software. If you use this software
       in a product, an acknowledgment in the product documentation would be
       appreciated but is not required.
    2. Altered source versions must be plainly marked as such, and must not be
       misrepresented as being the original software.
    3. This notice may not be removed or altered from any source distribution.
  */
  #include "SDL_config.h"
  
  #ifdef SDL_TIMER_BEOS
  
  #include <be/kernel/OS.h>
  
  #include "SDL_timer.h"
  
  static bigtime_t start;
  static SDL_bool ticks_started = SDL_FALSE;
  
  void
  SDL_InitTicks(void)
  {
      if (ticks_started) {
          return;
      }
      ticks_started = SDL_TRUE;
  
      /* Set first ticks value */
      start = system_time();
  }
  
  Uint32
  SDL_GetTicks(void)
  {
      if (!ticks_started) {
          SDL_InitTicks();
      }
  
      return ((system_time() - start) / 1000);
  }
  
  Uint64
  SDL_GetPerformanceCounter(void)
  {
      return system_time();
  }
  
  Uint64
  SDL_GetPerformanceFrequency(void)
  {
      return 1000000;
  }
  
  void
  SDL_Delay(Uint32 ms)
  {
      snooze(ms * 1000);
  }
  
  #endif /* SDL_TIMER_BEOS */
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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