public static UnmanagedMemoryBlock <T> Copy(void *address, int count)
{
var len = count * InfoOf <T> .Size;
var ret = new UnmanagedMemoryBlock <T>(count);
new UnmanagedMemoryBlock <T>((T *)address, count).CopyTo(ret);
//source.AsSpan().CopyTo(ret.AsSpan()); //TODO! Benchmark at netcore 3.0, it should be faster than buffer.memorycopy.
return(ret);
}
public static UnmanagedMemoryBlock <T> Copy(UnmanagedMemoryBlock <T> source)
{
var itemCount = source.Count;
var len = itemCount * InfoOf <T> .Size;
var ret = new UnmanagedMemoryBlock <T>(itemCount);
source.CopyTo(ret);
//source.AsSpan().CopyTo(ret.AsSpan()); //TODO! Benchmark at netcore 3.0, it should be faster than buffer.memorycopy.
return(ret);
}
/// <summary>
/// Copies the entire contents of this storage to given address (using <see cref="Count"/>).
/// </summary>
/// <param name="dst">The block to copy to.</param>
public static unsafe void CopyTo <T>(this UnmanagedMemoryBlock <T> src, UnmanagedMemoryBlock <T> dst) where T : unmanaged
{
if (src.Count > dst.Count)
{
throw new ArgumentOutOfRangeException(nameof(dst), $"Unable to copy from this storage to given array because this storage count is larger than the given array length.");
}
var bytesCount = src.BytesCount;
Buffer.MemoryCopy(src.Address, dst.Address, bytesCount, bytesCount);
}
public static UnmanagedMemoryBlock <T> FromArray(T[] arr, bool copy)
{
if (!copy)
{
return(new UnmanagedMemoryBlock <T>(GCHandle.Alloc(arr, GCHandleType.Pinned), arr.Length));
}
var ret = new UnmanagedMemoryBlock <T>(arr.Length);
new Span <T>(arr).CopyTo(ret.AsSpan());
return(ret);
}
public static UnmanagedMemoryBlock <T> FromArray(T[,,,,,,,,,,,,,,,] arr, bool copy)
{
if (!copy)
{
return(new UnmanagedMemoryBlock <T>(GCHandle.Alloc(arr, GCHandleType.Pinned), arr.Length));
}
var ret = new UnmanagedMemoryBlock <T>(arr.Length);
fixed(T *arrptr = arr)
{
new UnmanagedMemoryBlock <T>(arrptr, arr.Length).CopyTo(ret);
}
return(ret);
}