/// <summary>
/// Initializes a new instance of the <see cref = "DataBuffer" /> class, and allocates a new buffer to use as a backing store.
/// </summary>
/// <param name = "sizeInBytes">The size of the buffer to be allocated, in bytes.</param>
/// <exception cref = "T:System.ArgumentOutOfRangeException">
/// <paramref name = "sizeInBytes" /> is less than 1.</exception>
public DataBuffer(int sizeInBytes)
{
unsafe
{
Debug.Assert(sizeInBytes > 0);
_buffer = (sbyte *)SdxUtilities.AllocateMemory(sizeInBytes);
_size = sizeInBytes;
_ownsBuffer = true;
}
}
/// <summary>
/// Initializes a new instance of the <see cref = "DataStream" /> class, and allocates a new buffer to use as a backing store.
/// </summary>
/// <param name = "sizeInBytes">The size of the buffer to be allocated, in bytes.</param>
/// <param name = "canRead">
/// <c>true</c> if reading from the buffer should be allowed; otherwise, <c>false</c>.</param>
/// <param name = "canWrite">
/// <c>true</c> if writing to the buffer should be allowed; otherwise, <c>false</c>.</param>
public DataStream(int sizeInBytes, bool canRead, bool canWrite)
{
unsafe
{
Debug.Assert(sizeInBytes > 0);
_buffer = (byte *)SdxUtilities.AllocateMemory(sizeInBytes);
_size = sizeInBytes;
_ownsBuffer = true;
_canRead = canRead;
_canWrite = canWrite;
}
}
internal unsafe DataBuffer(void *buffer, int sizeInBytes, bool makeCopy)
{
Debug.Assert(sizeInBytes > 0);
if (makeCopy)
{
_buffer = (sbyte *)SdxUtilities.AllocateMemory(sizeInBytes);
SdxUtilities.CopyMemory((IntPtr)_buffer, (IntPtr)buffer, sizeInBytes);
}
else
{
_buffer = (sbyte *)buffer;
}
_size = sizeInBytes;
_ownsBuffer = makeCopy;
}
internal unsafe DataStream(void *buffer, int sizeInBytes, bool canRead, bool canWrite, bool makeCopy)
{
Debug.Assert(sizeInBytes > 0);
if (makeCopy)
{
_buffer = (byte *)SdxUtilities.AllocateMemory(sizeInBytes);
SdxUtilities.CopyMemory((IntPtr)_buffer, (IntPtr)buffer, sizeInBytes);
}
else
{
_buffer = (byte *)buffer;
}
_size = sizeInBytes;
_canRead = canRead;
_canWrite = canWrite;
_ownsBuffer = makeCopy;
}
