private MappingService(IntPtr pService) { _service = pService; _win32Service = InteropTools.Unpack<Win32Service>(_service); }
private MappingService(IntPtr pService) { _service = pService; _win32Service = InteropTools.Unpack <Win32Service>(_service); }
/// <summary> /// Constructs a new <see cref="MappingService">MappingService</see> object by instanciating an ELS service /// by its guid. For Windows 7, the only supported GUIDs are provided as /// readonly members of the <see cref="MappingAvailableServices">MappingAvailableServices</see> class. /// /// If the service /// with the specified guid doesn't exist, a <see cref="LinguisticException">LinguisticException</see> is thrown. /// </summary> /// <param name="serviceIdentifier">The guid of the service to instantiate.</param> public MappingService(Guid serviceIdentifier) { ThrowIfNotWin7(); IntPtr servicePointer; UInt32 serviceCount = 0; UInt32 hresult = 0; // First, check to see if we already have the service in the cache: servicePointer = ServiceCache.Instance.GetCachedService(ref serviceIdentifier); if (servicePointer != IntPtr.Zero) { _service = servicePointer; _win32Service = InteropTools.Unpack<Win32Service>(_service); } else // pService is IntPtr.Zero in this case. { // If we don't, we must find it via MappingGetServices: IntPtr guidPtr = IntPtr.Zero; try { guidPtr = Marshal.AllocHGlobal(InteropTools.SizeOfGuid); Win32EnumOptions enumOptions = new Win32EnumOptions(); enumOptions._size = InteropTools.SizeOfWin32EnumOptions; Marshal.StructureToPtr(serviceIdentifier, guidPtr, false); enumOptions._pGuid = guidPtr; hresult = Win32NativeMethods.MappingGetServices(ref enumOptions, ref servicePointer, ref serviceCount); if (hresult != 0) { throw new LinguisticException(hresult); } if (servicePointer == IntPtr.Zero) { throw new InvalidOperationException(); } if (serviceCount != 1) { hresult = Win32NativeMethods.MappingFreeServices(servicePointer); if (hresult == 0) { throw new InvalidOperationException(); } else { throw new LinguisticException(hresult); } } IntPtr[] services = new IntPtr[1]; ServiceCache.Instance.RegisterServices(ref servicePointer, services); _service = services[0]; _win32Service = InteropTools.Unpack<Win32Service>(_service); } finally { if (servicePointer != IntPtr.Zero) { // Ignore the result if an exception is being thrown. Win32NativeMethods.MappingFreeServicesVoid(servicePointer); } if (guidPtr != IntPtr.Zero) { Marshal.FreeHGlobal(guidPtr); } } } }
/// <summary> /// Constructs a new <see cref="MappingService">MappingService</see> object by instanciating an ELS service /// by its guid. For Windows 7, the only supported GUIDs are provided as /// readonly members of the <see cref="MappingAvailableServices">MappingAvailableServices</see> class. /// /// If the service /// with the specified guid doesn't exist, a <see cref="LinguisticException">LinguisticException</see> is thrown. /// </summary> /// <param name="serviceIdentifier">The guid of the service to instantiate.</param> public MappingService(Guid serviceIdentifier) { ThrowIfNotWin7(); IntPtr servicePointer; UInt32 serviceCount = 0; UInt32 hresult = 0; // First, check to see if we already have the service in the cache: servicePointer = ServiceCache.Instance.GetCachedService(ref serviceIdentifier); if (servicePointer != IntPtr.Zero) { _service = servicePointer; _win32Service = InteropTools.Unpack <Win32Service>(_service); } else // pService is IntPtr.Zero in this case. { // If we don't, we must find it via MappingGetServices: IntPtr guidPtr = IntPtr.Zero; try { guidPtr = Marshal.AllocHGlobal(InteropTools.SizeOfGuid); Win32EnumOptions enumOptions = new Win32EnumOptions(); enumOptions._size = InteropTools.SizeOfWin32EnumOptions; Marshal.StructureToPtr(serviceIdentifier, guidPtr, false); enumOptions._pGuid = guidPtr; hresult = Win32NativeMethods.MappingGetServices(ref enumOptions, ref servicePointer, ref serviceCount); if (hresult != 0) { throw new LinguisticException(hresult); } if (servicePointer == IntPtr.Zero) { throw new InvalidOperationException(); } if (serviceCount != 1) { hresult = Win32NativeMethods.MappingFreeServices(servicePointer); if (hresult == 0) { throw new InvalidOperationException(); } else { throw new LinguisticException(hresult); } } IntPtr[] services = new IntPtr[1]; ServiceCache.Instance.RegisterServices(ref servicePointer, services); _service = services[0]; _win32Service = InteropTools.Unpack <Win32Service>(_service); } finally { if (servicePointer != IntPtr.Zero) { // Ignore the result if an exception is being thrown. Win32NativeMethods.MappingFreeServicesVoid(servicePointer); } if (guidPtr != IntPtr.Zero) { Marshal.FreeHGlobal(guidPtr); } } } }