private static T ReadStruct<T>(MemoryMappedViewAccessor accessor, long position)
{
int size = Marshal.SizeOf<T>();
byte[] buffer = new byte[size];
accessor.ReadArray(position, buffer, 0, size);
GCHandle handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
try
{
return Marshal.PtrToStructure<T>(handle.AddrOfPinnedObject());
}
finally
{
handle.Free();
}
}
private float GetCpuTemp()
{
Mutex mutex = null;
try
{
if (!Mutex.TryOpenExisting("Global\\HWiNFO_SM2_MUTEX", out mutex))
{
System.Diagnostics.Debug.WriteLine("HWiNFO mutex not found");
return -1;
}
if (!mutex.WaitOne(500))
{
System.Diagnostics.Debug.WriteLine("Timeout waiting for HWiNFO mutex");
return -1;
}
using var mmf = MemoryMappedFile.OpenExisting("Global\\HWiNFO_SENS_SM2");
using var accessor = mmf.CreateViewAccessor();
var header = ReadStruct<HWiNFOHeader>(accessor, 0);
uint magic = header.Magic;
if (magic == 0x53695748) // 'HWiS' reversed
{
magic = SwapEndianness(magic);
}
if (magic != 0x48576953) // 'SiWH'
{
System.Diagnostics.Debug.WriteLine($"HWiNFO magic mismatch: 0x{header.Magic:X8}");
return -1;
}
float bestTemp = -1f;
for (uint i = 0; i < header.EntryElementCount; i++)
{
long offset = header.EntrySectionOffset + (long)i * header.EntryElementSize;
var reading = ReadStruct<HWiNFOEntry>(accessor, offset);
if (reading.Unit.Contains("C") &&
reading.NameOriginal.IndexOf("CPU Package", StringComparison.OrdinalIgnoreCase) >= 0)
{
float value = (float)reading.Value;
if (value > bestTemp)
bestTemp = value;
}
}
return bestTemp;
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine($"HWiNFO CPU temp error: {ex.Message}");
return -1f;
}
finally
{
mutex?.ReleaseMutex();
mutex?.Dispose();
}
}
// Helper method
private static uint SwapEndianness(uint value)
{
return ((value & 0xFF000000) >> 24) |
((value & 0x00FF0000) >> 8) |
((value & 0x0000FF00) << 8) |
((value & 0x000000FF) << 24);
}
