public void AllPublicAPI_ThrowsDisposedException_WhenNotCreated()
{
ManagedMemoryAllocator allocator = new ManagedMemoryAllocator();
Assert.Throws <ObjectDisposedException>(() => allocator.Alloc());
Assert.Throws <ObjectDisposedException>(() => allocator.Free(null));
Assert.Throws <ObjectDisposedException>(() => allocator.Dispose());
}
public void PageParameters_AreConsistentWithAlignmentAndStorageRequirements_OverMultipleAllocations()
{
const int k_Allocations = 16;
var sizes = Enumerable.Range(1, 17).ToArray();
var aligns = new[] { 2, 4, 8, 16 };
var pointers = stackalloc byte *[k_Allocations];
for (int s = 0; s < sizes.Length; ++s)
{
for (int a = 0; a < aligns.Length; ++a)
{
var size = sizes[s];
var align = aligns[a];
using (var allocator = new ManagedMemoryAllocator(size, align))
{
ManagedMemoryAllocator.PageNode *head = allocator.GetHeadPage();
Assert.IsTrue(head != null);
ref var page = ref head->MemoryPage;
Assert.NotZero(page.m_StrongHandle);
Assert.NotZero(page.m_Capacity);
Assert.AreEqual(page.m_Capacity, page.m_FreeObjects);
Assert.Zero(page.m_ObjectSizeAligned % align, $"Aligned object size ({page.m_ObjectSizeAligned}) check failed for size {size} and align {align}");
Assert.GreaterOrEqual(page.m_ObjectSizeAligned, size);
for (int i = 0; i < k_Allocations; ++i)
{
var numAllocations = 0;
for (var current = head; current != null; current = current->Next)
{
numAllocations += current->MemoryPage.ObjectsInUse();
}
Assert.AreEqual(i, numAllocations);
pointers[i] = (byte *)allocator.Alloc();
bool foundAllocation = false;
for (var current = head; current != null; current = current->Next)
{
foundAllocation = current->MemoryPage.Contains(pointers[i]);
if (foundAllocation)
{
break;
}
}
Assert.IsTrue(foundAllocation, "Could not find the allocation in any memory pages");
long intPtr = (long)pointers[i];
Assert.Zero(intPtr % align, "Actual pointer is not aligned");
}
for (int i = 0; i < k_Allocations; ++i)
{
allocator.Free(pointers[i]);
var numAllocations = 0;
for (var current = head; current != null; current = current->Next)
{
numAllocations += current->MemoryPage.ObjectsInUse();
}
Assert.AreEqual(k_Allocations - i - 1, numAllocations);
}
}
}
}