kc3-lang/SDL/test/testloadso.c

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• Hash : b72938c8
  Author :
  Date : 2015-04-20T12:22:44
  

  Windows: Always set the system timer resolution to 1ms by default. An existing hint lets apps that don't need the timer resolution changed avoid this, to save battery, etc, but this fixes several problems in timing, audio callbacks not firing fast enough, etc. Fixes Bugzilla #2944.

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• test/testloadso.c

• /*
    Copyright (C) 1997-2014 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.
  */
  
  /* Test program to test dynamic loading with the loadso subsystem.
  */
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  
  #include "SDL.h"
  
  typedef int (*fntype) (const char *);
  
  int
  main(int argc, char *argv[])
  {
      int retval = 0;
      int hello = 0;
      const char *libname = NULL;
      const char *symname = NULL;
      void *lib = NULL;
      fntype fn = NULL;
  
      if (argc != 3) {
          const char *app = argv[0];
          SDL_Log("USAGE: %s <library> <functionname>\n", app);
          SDL_Log("       %s --hello <lib with puts()>\n", app);
          return 1;
      }
  
      /* Initialize SDL */
      if (SDL_Init(0) < 0) {
          SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
          return 2;
      }
  
      if (strcmp(argv[1], "--hello") == 0) {
          hello = 1;
          libname = argv[2];
          symname = "puts";
      } else {
          libname = argv[1];
          symname = argv[2];
      }
  
      lib = SDL_LoadObject(libname);
      if (lib == NULL) {
          SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_LoadObject('%s') failed: %s\n",
                  libname, SDL_GetError());
          retval = 3;
      } else {
          fn = (fntype) SDL_LoadFunction(lib, symname);
          if (fn == NULL) {
              SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_LoadFunction('%s') failed: %s\n",
                      symname, SDL_GetError());
              retval = 4;
          } else {
              SDL_Log("Found %s in %s at %p\n", symname, libname, fn);
              if (hello) {
                  SDL_Log("Calling function...\n");
                  fflush(stdout);
                  fn("     HELLO, WORLD!\n");
                  SDL_Log("...apparently, we survived.  :)\n");
                  SDL_Log("Unloading library...\n");
                  fflush(stdout);
              }
          }
          SDL_UnloadObject(lib);
      }
      SDL_Quit();
      return retval;
  }
  

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