Initialize() [2/2]

unsafe void System.IO.UnmanagedMemoryStream.Initialize ( SafeBuffer buffer, long offset, long length, FileAccess access )

inlineprotectedinherited

Definition at line 146 of file UnmanagedMemoryStream.cs.

    {
        if (buffer == null)
        {
            throw new ArgumentNullException("buffer");
        }
        if (offset < 0)
        {
            throw new ArgumentOutOfRangeException("offset", SR.ArgumentOutOfRange_NeedNonNegNum);
        }
        if (length < 0)
        {
            throw new ArgumentOutOfRangeException("length", SR.ArgumentOutOfRange_NeedNonNegNum);
        }
        if (buffer.ByteLength < (ulong)(offset + length))
        {
            throw new ArgumentException(SR.Argument_InvalidSafeBufferOffLen);
        }
        if (access < FileAccess.Read || access > FileAccess.ReadWrite)
        {
            throw new ArgumentOutOfRangeException("access");
        }
        if (_isOpen)
        {
            throw new InvalidOperationException(SR.InvalidOperation_CalledTwice);
        }
        byte* pointer = null;
        try
        {
            buffer.AcquirePointer(ref pointer);
            if (pointer + offset + length < pointer)
            {
                throw new ArgumentException(SR.ArgumentOutOfRange_UnmanagedMemStreamWrapAround);
            }
        }
        finally
        {
            if (pointer != null)
            {
                buffer.ReleasePointer();
            }
        }
        _offset = offset;
        _buffer = buffer;
        _length = length;
        _capacity = length;
        _access = access;
        _isOpen = true;
    }

References System.IO.UnmanagedMemoryStream._access, System.IO.UnmanagedMemoryStream._buffer, System.IO.UnmanagedMemoryStream._capacity, System.IO.UnmanagedMemoryStream._isOpen, System.IO.UnmanagedMemoryStream._length, System.IO.UnmanagedMemoryStream._offset, System.SR.Argument_InvalidSafeBufferOffLen, System.SR.ArgumentOutOfRange_NeedNonNegNum, System.SR.ArgumentOutOfRange_UnmanagedMemStreamWrapAround, System.buffer, System.SR.InvalidOperation_CalledTwice, System.length, System.offset, and System.pointer.

Referenced by System.IO.MemoryMappedFiles.MemoryMappedViewStream.MemoryMappedViewStream(), System.IO.PinnedBufferMemoryStream.PinnedBufferMemoryStream(), System.IO.UnmanagedMemoryStream.UnmanagedMemoryStream(), System.IO.UnmanagedMemoryStream.UnmanagedMemoryStream(), System.IO.UnmanagedMemoryStream.UnmanagedMemoryStream(), and System.IO.UnmanagedMemoryStream.UnmanagedMemoryStream().