public void UsageTest()
{
ByteArrayAllocator allocator = new ByteArrayAllocator(8, 4);
byte *p1 = allocator.Allocate();
*(int *)(p1 + 0) = int.MaxValue;
*(int *)(p1 + 4) = int.MaxValue;
Assert.AreEqual(1, *(p1 - 1));
Assert.AreEqual(0, *(p1 - 2));
byte *p2 = allocator.Allocate();
*(int *)(p2 + 0) = int.MaxValue;
*(int *)(p2 + 4) = int.MaxValue;
Assert.AreEqual(2, *(p2 - 1));
Assert.AreEqual(1, *(p2 - 2));
byte *p3 = allocator.Allocate();
*(int *)(p3 + 0) = int.MaxValue;
*(int *)(p3 + 4) = int.MaxValue;
Assert.AreEqual(3, *(p3 - 1));
Assert.AreEqual(2, *(p3 - 2));
byte *p4 = allocator.Allocate();
*(int *)(p4 + 0) = int.MaxValue;
*(int *)(p4 + 4) = int.MaxValue;
Assert.AreEqual(4, *(p4 - 1));
Assert.AreEqual(3, *(p4 - 2));
allocator.Free(p4);
allocator.Free(p3);
allocator.Free(p2);
allocator.Free(p1);
byte *p5 = allocator.Allocate();
*(int *)(p5 + 0) = int.MaxValue;
*(int *)(p5 + 4) = int.MaxValue;
Assert.AreEqual(1, *(p5 - 1));
Assert.AreEqual(0, *(p5 - 2));
allocator.Free(p5);
allocator.Dispose();
}
public void ParallelTest()
{
ByteArrayAllocator allocator = new ByteArrayAllocator(8, 80);
const int size = 100_000;
byte *[] ptrs = new byte *[size];
Parallel.For(
0, size, i =>
{
ptrs[i] = allocator.Allocate();
});
Parallel.For(
0, size, i =>
{
allocator.Free(ptrs[i]);
});
allocator.Dispose();
}
public void AllocateMoreThanSpace()
{
ByteArrayAllocator allocator = new ByteArrayAllocator(8, 4);
byte *p1 = allocator.Allocate();
*(int *)(p1 + 0) = int.MaxValue;
*(int *)(p1 + 4) = int.MaxValue;
Assert.AreEqual(1, *(p1 - 1));
Assert.AreEqual(0, *(p1 - 2));
byte *p2 = allocator.Allocate();
*(int *)(p2 + 0) = int.MaxValue;
*(int *)(p2 + 4) = int.MaxValue;
Assert.AreEqual(2, *(p2 - 1));
Assert.AreEqual(1, *(p2 - 2));
byte *p3 = allocator.Allocate();
*(int *)(p3 + 0) = int.MaxValue;
*(int *)(p3 + 4) = int.MaxValue;
Assert.AreEqual(3, *(p3 - 1));
Assert.AreEqual(2, *(p3 - 2));
byte *p4 = allocator.Allocate();
*(int *)(p4 + 0) = int.MaxValue;
*(int *)(p4 + 4) = int.MaxValue;
Assert.AreEqual(4, *(p4 - 1));
Assert.AreEqual(3, *(p4 - 2));
allocator.Free(p1);
byte *p5 = allocator.Allocate();
*(int *)(p5 + 0) = int.MaxValue;
*(int *)(p5 + 4) = int.MaxValue;
Assert.AreEqual(4, *(p5 - 1));
Assert.AreEqual(0, *(p5 - 2));
byte *p6 = allocator.Allocate();
*(int *)(p6 + 0) = int.MaxValue;
*(int *)(p6 + 4) = int.MaxValue;
Assert.AreEqual(0, *(p6 - 1));
Assert.AreEqual(0, *(p6 - 2));
allocator.Free(p6);
allocator.Free(p5);
byte *p7 = allocator.Allocate();
*(int *)(p7 + 0) = int.MaxValue;
*(int *)(p7 + 4) = int.MaxValue;
Assert.AreEqual(4, *(p7 - 1));
Assert.AreEqual(0, *(p7 - 2));
allocator.Free(p7);
allocator.Free(p2);
allocator.Free(p3);
byte *p8 = allocator.Allocate();
*(int *)(p8 + 0) = int.MaxValue;
*(int *)(p8 + 4) = int.MaxValue;
Assert.AreEqual(1, *(p8 - 1));
Assert.AreEqual(2, *(p8 - 2));
allocator.Free(p4);
allocator.Dispose();
}