|
private HidD_FreePreparsedData ( |
||
| preparsed | ||
| return | bool | |
internal void GetInfoComplete(IntPtr handle)
{
try {
char[] buffer = new char[128];
_manufacturer = NativeMethods.HidD_GetManufacturerString(handle, buffer, 256) ? NativeMethods.NTString(buffer) : "";
_productName = NativeMethods.HidD_GetProductString(handle, buffer, 256) ? NativeMethods.NTString(buffer) : "";
_serialNumber = NativeMethods.HidD_GetSerialNumberString(handle, buffer, 256) ? NativeMethods.NTString(buffer) : "";
IntPtr preparsed;
if (NativeMethods.HidD_GetPreparsedData(handle, out preparsed))
{
NativeMethods.HIDP_CAPS caps;
int statusCaps = NativeMethods.HidP_GetCaps(preparsed, out caps);
if (statusCaps == NativeMethods.HIDP_STATUS_SUCCESS)
{
_maxInput = caps.InputReportByteLength;
_maxOutput = caps.OutputReportByteLength;
_maxFeature = caps.FeatureReportByteLength;
}
NativeMethods.HidD_FreePreparsedData(preparsed);
}
} finally {
NativeMethods.CloseHandle(handle);
}
lock (_completeSync) {
_complete = true;
Monitor.PulseAll(_completeSync);
}
}
void RequiresGetInfo(GetInfoFlags flags)
{
lock (_getInfoLock)
{
flags &= ~_getInfoFlags; // Remove flags we already have.
if (flags == 0)
{
return;
}
if (!TryOpenToGetInfo(handle =>
{
if ((flags & GetInfoFlags.Manufacturer) != 0)
{
if (!TryGetDeviceString(handle, NativeMethods.HidD_GetManufacturerString, out _manufacturer))
{
return(false);
}
}
if ((flags & GetInfoFlags.ProductName) != 0)
{
if (!TryGetDeviceString(handle, NativeMethods.HidD_GetProductString, out _productName))
{
return(false);
}
}
if ((flags & GetInfoFlags.SerialNumber) != 0)
{
if (!TryGetDeviceString(handle, NativeMethods.HidD_GetSerialNumberString, out _serialNumber))
{
return(false);
}
}
if ((flags & GetInfoFlags.ReportInfo) != 0)
{
IntPtr preparsed;
if (!NativeMethods.HidD_GetPreparsedData(handle, out preparsed))
{
return(false);
}
try
{
NativeMethods.HIDP_CAPS caps;
int statusCaps = NativeMethods.HidP_GetCaps(preparsed, out caps);
if (statusCaps != NativeMethods.HIDP_STATUS_SUCCESS)
{
return(false);
}
_maxInput = caps.InputReportByteLength;
_maxOutput = caps.OutputReportByteLength;
_maxFeature = caps.FeatureReportByteLength;
try { _reportDescriptor = new ReportDescriptorReconstructor().Run(preparsed, caps); }
catch (NotImplementedException) { _reportDescriptor = null; }
catch { return(false); }
}
finally
{
NativeMethods.HidD_FreePreparsedData(preparsed);
}
}
return(true);
}))
{
throw DeviceException.CreateIOException(this, "Failed to get info.");
}
_getInfoFlags |= flags;
}
}
