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

• Show log

  Commit

• Hash : 99c9727d
  Author :
  Date : 2021-10-23T15:00:31
  

  timer: Added SDL_GetTicks64(), for a timer that doesn't wrap every ~49 days. Note that this removes the timeGetTime() fallback on Windows; it is a 32-bit counter and SDL2 should never choose to use it, as it only is needed if QueryPerformanceCounter() isn't available, and QPC is _always_ available on Windows XP and later. OS/2 has a similar situation, but since it isn't clear to me that similar promises can be made about DosTmrQueryTime() even in modern times, I decided to leave the fallback in, with some heroic measures added to try to provide a true 64-bit tick counter despite the 49-day wraparound. That approach can migrate to Windows too, if we discover some truly broken install that doesn't have QPC and still depends on timeGetTime(). Fixes #4870.

Download

• src/timer/vita/SDL_systimer.c

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2015 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_internal.h"
  
  #ifdef SDL_TIMER_VITA
  
  #include "SDL_thread.h"
  #include "SDL_timer.h"
  #include "SDL_error.h"
  #include "../SDL_timer_c.h"
  #include <stdlib.h>
  #include <time.h>
  #include <sys/time.h>
  #include <psp2/kernel/processmgr.h>
  
  static uint64_t start;
  static SDL_bool ticks_started = SDL_FALSE;
  
  void
  SDL_TicksInit(void)
  {
      if (ticks_started) {
          return;
      }
      ticks_started = SDL_TRUE;
  
      start = sceKernelGetProcessTimeWide();
  }
  
  void
  SDL_TicksQuit(void)
  {
      ticks_started = SDL_FALSE;
  }
  
  Uint64
  SDL_GetTicks64(void)
  {
      uint64_t now;
  
      if (!ticks_started) {
          SDL_TicksInit();
      }
  
      now = sceKernelGetProcessTimeWide();
      return (Uint64) ((now - start) / 1000);
  }
  
  Uint64
  SDL_GetPerformanceCounter(void)
  {
      return sceKernelGetProcessTimeWide();
  }
  
  Uint64
  SDL_GetPerformanceFrequency(void)
  {
      return 1000000;
  }
  
  void SDL_Delay(Uint32 ms)
  {
      const Uint32 max_delay = 0xffffffffUL / 1000;
      if(ms > max_delay)
          ms = max_delay;
      sceKernelDelayThreadCB(ms * 1000);
  }
  
  #endif /* SDL_TIMER_VITA */
  
  /* vi: set ts=4 sw=4 expandtab: */
  

Download