C# ObjectPool.Free方法代码示例

        public void TestAllocateAndFree()
        {
            var pool = new ObjectPool<TestElement>();
            pool.Initialize();

            Assert.IsTrue(pool.UsedListSize == 0 && pool.FreeListSize == 0);

            // allocate some instances
            var e1 = pool.Allocate();
            var e2 = pool.Allocate();

            Assert.IsTrue(pool.UsedListSize == 2 && pool.FreeListSize == 0);
            Assert.IsTrue(e1 != e2);
            Assert.IsTrue(e1.value == 0);

            // free both and then allocate two more again - we should get both back

            pool.Free(e1);
            pool.Free(e2);
            Assert.IsTrue(pool.UsedListSize == 0 && pool.FreeListSize == 2);

            var e3 = pool.Allocate();
            var e4 = pool.Allocate();
            Assert.IsTrue(pool.UsedListSize == 2 && pool.FreeListSize == 0);
            Assert.IsTrue(e3 == e2);
            Assert.IsTrue(e4 == e1);
        }

            public void WillReturnObjectToPoolIfExcessCapacity()
            {
                var value = new Mock<IDisposable>();

                using (var objectPool = new ObjectPool<IDisposable>(() => value.Object, item => item.Dispose()))
                {
                    objectPool.Free(objectPool.Allocate());

                    value.Verify(mock => mock.Dispose(), Times.Never());
                }
            }

            public void WillAllocateExistingObjectIfPoolNotEmpty()
            {
                using (var objectPool = new ObjectPool<Object>(() => new Object()))
                {
                    var value = objectPool.Allocate();

                    objectPool.Free(value);

                    Assert.Equal(value, objectPool.Allocate());
                }
            }

        public void TestAllocAndFree()
        {
            var pool = new ObjectPool<PoolableObject>(10);
            var poolableObject = pool.Alloc();

            poolableObject.Value = 22;

            pool.Free(poolableObject);

            Assert.AreEqual(0, poolableObject.Value);
        }

        public void TestFactoryAndReset()
        {
            var pool = new ObjectPool<TestElement>();
            pool.Initialize(() => { var e = new TestElement(); e.value = 42; return e; });

            // allocate a new instance using this custom factory, make sure the factory code got called
            var e1 = pool.Allocate();
            Assert.IsTrue(e1.value == 42);

            // free it, and make sure it got reset
            pool.Free(e1);
            Assert.IsTrue(e1.value == 0);

            // now allocate again, this time since it's coming from the object pool,
            // the factory code won't be called
            var e2 = pool.Allocate();
            Assert.IsTrue(e1 == e2);
            Assert.IsTrue(e2.value == 0); // because this is coming from the pool, not factory
        }

        public void TestPoolRelease()
        {
            var pool = new ObjectPool<TestElement>();
            pool.Initialize(() => { var e = new TestElement(); e.value = 42; return e; });

            // allocate a new instance using this custom factory, make sure the factory code got called
            var e1 = pool.Allocate();
            Assert.IsTrue(e1.value == 42);
            Assert.IsTrue(pool.UsedListSize == 1);
            Assert.IsTrue(pool.FreeListSize == 0);

            // allocate and free an instance. this will grow the pool to size one
            pool.Free(pool.Allocate());
            Assert.IsTrue(pool.UsedListSize == 1);
            Assert.IsTrue(pool.FreeListSize == 1);

            // now release the entire object pool. this will clear out the free list, but will not
            // affect the object already in circulation, since we're not tracking them.
            pool.Release();
            Assert.IsTrue(e1.value == 42);
            Assert.IsTrue(pool.UsedListSize == 1);
            Assert.IsTrue(pool.FreeListSize == -1);
        }

        private static void FreeEventQueue(AsyncQueue<CompilationEvent> eventQueue, ObjectPool<AsyncQueue<CompilationEvent>> eventQueuePool)
        {
            if (eventQueue == null || ReferenceEquals(eventQueue, s_EmptyEventQueue))
            {
                return;
            }

            if (eventQueue.Count > 0)
            {
                CompilationEvent discarded;
                while (eventQueue.TryDequeue(out discarded)) ;
            }

            if (!eventQueue.IsCompleted)
            {
                eventQueuePool.Free(eventQueue);
            }
            else
            {
                eventQueuePool.ForgetTrackedObject(eventQueue);
            }
        }

            public void WillDisposeObjectIfPoolCapacityExceeded()
            {
                var first = new Mock<IDisposable>();
                var second = new Mock<IDisposable>();
                var objects = new Queue<IDisposable>(new[] { first.Object, second.Object });

                using (var objectPool = new ObjectPool<IDisposable>(() => objects.Dequeue(), item => item.Dispose(), size: 1))
                {
                    var value1 = objectPool.Allocate();
                    var value2 = objectPool.Allocate();

                    objectPool.Free(value1);
                    objectPool.Free(value2);

                    first.Verify(mock => mock.Dispose(), Times.Never());
                    second.Verify(mock => mock.Dispose(), Times.Once());
                }
            }