public void CannotResizeIfExternalMemory()
{
var intptr = Marshal.AllocCoTaskMem(10);
using (var array = new ArrayPtr(intptr))
{
Assert.That(() => array.Resize(12), Throws.TypeOf <ApplicationException>());
}
}
public void DoOwnMemory_2()
{
using (var array = new ArrayPtr())
{
Assert.AreEqual(true, array.OwnMemory, "Should own memory");
array.Resize(10);
Assert.AreEqual(true, array.OwnMemory, "Should still own memory after resize");
}
}
public void CannotResizeIfExternalMemory()
{
var intptr = Marshal.AllocCoTaskMem(10);
using (var array = new ArrayPtr(intptr))
{
array.Resize(12);
}
}
public void CanResizeIfOwnMemory()
{
int originalSize = 10;
using (var array = new ArrayPtr(originalSize))
{
Assert.AreEqual(originalSize, array.Size);
int newSize = 12;
array.Resize(newSize);
Assert.AreEqual(newSize, array.Size);
}
}
public void DisposingArrayPtrOfOwnMemoryDoesFree_2()
{
IntPtr arrayIntPtr;
using (var array = new ArrayPtr())
{
array.Resize(10);
arrayIntPtr = array.IntPtr;
Marshal.WriteByte(arrayIntPtr, (byte)123);
}
byte b = Marshal.ReadByte(arrayIntPtr);
Assert.AreEqual((byte)0, b, "Owned memory should have been freed");
}
/// -----------------------------------------------------------------------------------
/// <summary>
/// Re-Allocates memory for <paramref name="nMaxSize"/> elements and returns a pointer
/// suitable to be passed as array to a COM method.
/// </summary>
/// <param name="arrayPtr">Pointer with previously allocated memory</param>
/// <param name="nMaxSize">Max. number of elements in the array</param>
/// <typeparam name="T">Type of elements in array</typeparam>
/// -----------------------------------------------------------------------------------
static public void ArrayToNative <T>(ref ArrayPtr arrayPtr, int nMaxSize)
{
arrayPtr.Resize(nMaxSize * SizeOf(typeof(T)));
}