kc3-lang/SDL/src/core/windows/SDL_hid.c

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• Hash : cb361896
  Author :
  Date : 2020-12-09T07:16:22
  

  Fixed bug 5235 - All internal sources should include SDL_assert.h Ryan C. Gordon We should really stick this in SDL_internal.h or something so it's always available.

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• src/core/windows/SDL_hid.c

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2020 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"
  
  #ifndef __WINRT__
  
  #include "SDL_hid.h"
  
  
  HidD_GetString_t SDL_HidD_GetManufacturerString;
  HidD_GetString_t SDL_HidD_GetProductString;
  HidD_GetPreparsedData_t SDL_HidD_GetPreparsedData;
  HidD_FreePreparsedData_t SDL_HidD_FreePreparsedData;
  HidP_GetCaps_t SDL_HidP_GetCaps;
  HidP_GetButtonCaps_t SDL_HidP_GetButtonCaps;
  HidP_GetValueCaps_t SDL_HidP_GetValueCaps;
  HidP_MaxDataListLength_t SDL_HidP_MaxDataListLength;
  HidP_GetData_t SDL_HidP_GetData;
  
  static HMODULE s_pHIDDLL = 0;
  static int s_HIDDLLRefCount = 0;
  
  
  int
  WIN_LoadHIDDLL(void)
  {
      if (s_pHIDDLL) {
          SDL_assert(s_HIDDLLRefCount > 0);
          s_HIDDLLRefCount++;
          return 0;  /* already loaded */
      }
  
      s_pHIDDLL = LoadLibrary(L"hid.dll");
      if (!s_pHIDDLL) {
          return -1;
      }
  
      SDL_assert(s_HIDDLLRefCount == 0);
      s_HIDDLLRefCount = 1;
  
      SDL_HidD_GetManufacturerString = (HidD_GetString_t)GetProcAddress(s_pHIDDLL, "HidD_GetManufacturerString");
      SDL_HidD_GetProductString = (HidD_GetString_t)GetProcAddress(s_pHIDDLL, "HidD_GetProductString");
      SDL_HidD_GetPreparsedData = (HidD_GetPreparsedData_t)GetProcAddress(s_pHIDDLL, "HidD_GetPreparsedData");
      SDL_HidD_FreePreparsedData = (HidD_FreePreparsedData_t)GetProcAddress(s_pHIDDLL, "HidD_FreePreparsedData");
      SDL_HidP_GetCaps = (HidP_GetCaps_t)GetProcAddress(s_pHIDDLL, "HidP_GetCaps");
      SDL_HidP_GetButtonCaps = (HidP_GetButtonCaps_t)GetProcAddress(s_pHIDDLL, "HidP_GetButtonCaps");
      SDL_HidP_GetValueCaps = (HidP_GetValueCaps_t)GetProcAddress(s_pHIDDLL, "HidP_GetValueCaps");
      SDL_HidP_MaxDataListLength = (HidP_MaxDataListLength_t)GetProcAddress(s_pHIDDLL, "HidP_MaxDataListLength");
      SDL_HidP_GetData = (HidP_GetData_t)GetProcAddress(s_pHIDDLL, "HidP_GetData");
      if (!SDL_HidD_GetManufacturerString || !SDL_HidD_GetProductString || !SDL_HidD_GetPreparsedData ||
          !SDL_HidD_FreePreparsedData || !SDL_HidP_GetCaps || !SDL_HidP_GetButtonCaps ||
          !SDL_HidP_GetValueCaps || !SDL_HidP_MaxDataListLength || !SDL_HidP_GetData) {
          WIN_UnloadHIDDLL();
          return -1;
      }
  
      return 0;
  }
  
  void
  WIN_UnloadHIDDLL(void)
  {
      if (s_pHIDDLL) {
          SDL_assert(s_HIDDLLRefCount > 0);
          if (--s_HIDDLLRefCount == 0) {
              FreeLibrary(s_pHIDDLL);
              s_pHIDDLL = NULL;
          }
      } else {
          SDL_assert(s_HIDDLLRefCount == 0);
      }
  }
  
  #endif /* !__WINRT__ */
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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