C++ (Cpp) DECL_FUNCTION_PTR示例

示例#1

文件： WMFUtils.cpp 项目： lofter2011/Icefox

HRESULT
MFUnlockWorkQueue(DWORD aWorkQueueId)
{
  DECL_FUNCTION_PTR(MFUnlockWorkQueue, DWORD);
  ENSURE_FUNCTION_PTR(MFUnlockWorkQueue, Mfplat.dll);
  return (MFUnlockWorkQueuePtr)(aWorkQueueId);
}

示例#2

文件： WMFUtils.cpp 项目： ShakoHo/gecko-dev

HRESULT
MFStartup()
{
  const int MF_VISTA_VERSION = (0x0001 << 16 | MF_API_VERSION);
  const int MF_WIN7_VERSION = (0x0002 << 16 | MF_API_VERSION);

  // decltype is unusable for functions having default parameters
  DECL_FUNCTION_PTR(MFStartup, ULONG, DWORD);
  ENSURE_FUNCTION_PTR_(MFStartup, Mfplat.dll)
  if (!IsWin7OrLater())
    return MFStartupPtr(MF_VISTA_VERSION, MFSTARTUP_FULL);
  else
    return MFStartupPtr(MF_WIN7_VERSION, MFSTARTUP_FULL);
}