public unsafe void SmallHeapMultiPageAllocationTest()
{
var xRAM = new byte[1024 * 1024]; // 4 MB
fixed(byte *xPtr = xRAM)
{
RAT.Debug = true;
RAT.Init(xPtr, (uint)xRAM.Length);
uint smallPages = RAT.GetPageCount(RAT.PageType.HeapSmall);
var ptr1 = Heap.Alloc(HeapSmall.mMaxItemSize); // 4 of them should fit on one page
var ptr2 = Heap.Alloc(HeapSmall.mMaxItemSize);
var ptr3 = Heap.Alloc(HeapSmall.mMaxItemSize);
var ptr4 = Heap.Alloc(HeapSmall.mMaxItemSize);
Assert.AreEqual((uint)ptr2 - (uint)ptr1, (uint)ptr4 - (uint)ptr3);
Assert.AreEqual((uint)RAT.GetPagePtr(ptr1), (uint)RAT.GetPagePtr(ptr2));
Assert.AreEqual(4, HeapSmall.GetAllocatedObjectCount());
Heap.Free(ptr4);
var nptr4 = Heap.Alloc(HeapSmall.mMaxItemSize);
Assert.AreEqual((uint)RAT.GetPagePtr(ptr1), (uint)RAT.GetPagePtr(ptr4));
var ptr5 = Heap.Alloc(HeapSmall.mMaxItemSize); // this should cause a new page to have to be created
uint largePages = RAT.GetPageCount(RAT.PageType.HeapLarge);
Assert.AreEqual((uint)0, largePages);
Assert.AreEqual(smallPages + 1, RAT.GetPageCount(RAT.PageType.HeapSmall));
Assert.AreNotEqual((uint)ptr1, (uint)ptr5);
Assert.IsTrue(((uint)ptr5 - (uint)ptr1) % RAT.PageSize == 0);
Assert.AreEqual(5, HeapSmall.GetAllocatedObjectCount());
// now lets force them to allocate 2 more pages
for (int i = 0; i < 8; i++)
{
Heap.Alloc(HeapSmall.mMaxItemSize - 2);
}
Assert.AreEqual(smallPages + 3, RAT.GetPageCount(RAT.PageType.HeapSmall));
Assert.AreEqual(13, HeapSmall.GetAllocatedObjectCount());
}
}
public unsafe void TestRATHeapMethods()
{
var xRAM = new byte[10 * RAT.PageSize]; // 10 Pages - 1 for RAT and 9 for values
fixed(byte *xPtr = xRAM)
{
RAT.Debug = true;
RAT.Init(xPtr, (uint)xRAM.Length);
var ptr1 = Heap.Alloc(10);
var ptr2 = Heap.Alloc(10);
var ptr3 = Heap.Alloc(10);
Assert.AreNotEqual((uint)ptr1, (uint)ptr2);
Assert.AreNotEqual((uint)ptr1, (uint)ptr3);
Assert.AreNotEqual((uint)ptr2, (uint)ptr3);
Assert.AreEqual(RAT.GetFirstRATIndex(ptr1), RAT.GetFirstRATIndex(ptr2));
Assert.AreEqual(RAT.GetFirstRATIndex(ptr1), RAT.GetFirstRATIndex(ptr3));
Assert.AreEqual((uint)RAT.GetPagePtr(ptr1), (uint)RAT.GetPagePtr(ptr2));
Assert.AreEqual((uint)RAT.GetPagePtr(ptr1), (uint)RAT.GetPagePtr(ptr3));
}
}