public void Allocate_ValidSizeWorks()
{
//Act
using (var target = SafeHGlobalHandle.Allocate(256))
{
var actual = target.Pointer;
var written = WriteMemory(target.Pointer, 256);
//Assert
target.IsInvalid.Should().BeFalse();
AssertMemory(target.Pointer, written);
};
}
public void Allocate_WithIntPtr()
{
IntPtr size = new IntPtr(1024);
//Act
using (var target = SafeHGlobalHandle.Allocate(size))
{
var actual = target.Pointer;
var written = WriteMemory(target.Pointer, size.ToInt32());
//Assert
target.IsInvalid.Should().BeFalse();
AssertMemory(target.Pointer, written);
};
}
/// <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)
{
var 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);
}
}
public void Allocate_InvalidSizeFails()
{
Action action = () => SafeHGlobalHandle.Allocate(-5);
action.ShouldThrowArgumentOutOfRangeException();
}
