/// <summary>
/// Ensures that there is sufficient memory allocated.
/// </summary>
/// <param name = "capacity">
/// The required capacity of the block, in bytes.
/// </param>
/// <exception cref = "OutOfMemoryException">
/// There is insufficient memory to satisfy the request.
/// </exception>
public void EnsureCapacity(int capacity)
{
int currentSize = _memoryBlock.IsInvalid ? 0 : _memoryBlock.Size;
if (capacity > currentSize)
{
if (0 != currentSize)
{
currentSize <<= 1;
}
if (capacity > currentSize)
{
currentSize = capacity;
}
if (!_memoryBlock.IsInvalid)
{
_memoryBlock.Dispose();
}
_memoryBlock = SafeHGlobalHandle.Allocate(currentSize);
}
}