private static string GetSchemeName(SafeHeapHandle <Guid> guid)
{
IntPtr schemeNameGuidPtr = guid.DangerousGetHandle();
int buffSize = 0;
if (PowrProf.PowerReadFriendlyName(IntPtr.Zero, schemeNameGuidPtr, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, ref buffSize) != ReturnCodes.ERROR_SUCCESS)
{
return(string.Empty);
}
if (buffSize == 0)
{
return(string.Empty);
}
IntPtr schemeNamePtr = Marshal.AllocHGlobal(buffSize);
if (PowrProf.PowerReadFriendlyName(IntPtr.Zero, schemeNameGuidPtr, IntPtr.Zero, IntPtr.Zero, schemeNamePtr, ref buffSize) != ReturnCodes.ERROR_SUCCESS)
{
Marshal.FreeHGlobal(schemeNamePtr);
return(string.Empty);
}
string schemeName = Marshal.PtrToStringUni(schemeNamePtr);
Marshal.FreeHGlobal(schemeNamePtr);
return(schemeName);
}
public LargeBuffer(int size, int firstSegmentGlobalIndex)
{
FirstSegmentGlobalIndex = firstSegmentGlobalIndex;
_bufferHandle = new SafeHeapHandle(size);
_bufferPointer = (byte *)_bufferHandle.DangerousGetHandle();
}
/// <summary>
/// Get the handle to the buffer. Prefer using SafeHandle instead of IntPtr for interop (there is an implicit converter).
/// </summary>
public override IntPtr DangerousGetHandle()
{
return(_handle?.DangerousGetHandle() ?? IntPtr.Zero);
}
