public RawDataResource(ResourceVolatility volatility, int size)
: base(volatility)
{
Size = size;
permanentArray = new UnmanagedArray(size);
getStream = () => new UnmanagedMemoryStream((byte *)permanentArray.Data, size);
}
private static void CheckEmptyArray(IUnmanagedArray <int> array)
{
Equal(0, array.Length);
Equal(Array.Empty <int>(), array);
Equal(Array.Empty <int>(), array.ToArray());
Equal(Stream.Null, array.AsStream());
True(array.BitwiseEquals(Array.Empty <int>()));
Equal(0, array.BitwiseCompare(Array.Empty <int>()));
Empty(array);
True(array.Pointer.IsNull);
array = (IUnmanagedArray <int>)array.Clone();
Equal(0, array.Length);
Equal(Array.Empty <int>(), array);
Equal(Array.Empty <int>(), array.ToArray());
Equal(Stream.Null, array.AsStream());
}
public IntPtr Map()
{
if (permanentArray != null)
{
return(permanentArray.Data);
}
Interlocked.Increment(ref mapCount);
if (temporaryArray != null)
{
return(temporaryArray.Data);
}
temporaryArray = new UnmanagedArray(Size);
var readStream = new UnmanagedMemoryStream((byte *)temporaryArray.Data, Size);
using (var writeStream = getStream())
writeStream.CopyTo(readStream);
return(temporaryArray.Data);
}
public void Unmap(bool wasModified)
{
if (permanentArray != null)
{
if (wasModified)
{
OnModified(null);
}
return;
}
if (wasModified)
{
throw new InvalidOperationException("Was trying to modify a stream-based RawDataResource");
}
Interlocked.Decrement(ref mapCount);
if (mapCount != 0)
{
return;
}
temporaryArray?.Dispose();
temporaryArray = null;
}