| // Copyright 2013 Cloudera, Inc. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include <gtest/gtest.h> |
| #include "kudu/util/object_pool.h" |
| |
| namespace kudu { |
| |
| // Simple class which maintains a count of how many objects |
| // are currently alive. |
| class MyClass { |
| public: |
| MyClass() { |
| instance_count_++; |
| } |
| |
| ~MyClass() { |
| instance_count_--; |
| } |
| |
| static int instance_count() { |
| return instance_count_; |
| } |
| |
| static void ResetCount() { |
| instance_count_ = 0; |
| } |
| |
| private: |
| static int instance_count_; |
| }; |
| int MyClass::instance_count_ = 0; |
| |
| TEST(TestObjectPool, TestPooling) { |
| MyClass::ResetCount(); |
| { |
| ObjectPool<MyClass> pool; |
| ASSERT_EQ(0, MyClass::instance_count()); |
| MyClass *a = pool.Construct(); |
| ASSERT_EQ(1, MyClass::instance_count()); |
| MyClass *b = pool.Construct(); |
| ASSERT_EQ(2, MyClass::instance_count()); |
| ASSERT_TRUE(a != b); |
| pool.Destroy(b); |
| ASSERT_EQ(1, MyClass::instance_count()); |
| MyClass *c = pool.Construct(); |
| ASSERT_EQ(2, MyClass::instance_count()); |
| ASSERT_TRUE(c == b) << "should reuse instance"; |
| pool.Destroy(c); |
| |
| ASSERT_EQ(1, MyClass::instance_count()); |
| } |
| |
| ASSERT_EQ(0, MyClass::instance_count()) |
| << "destructing pool should have cleared instances"; |
| } |
| |
| TEST(TestObjectPool, TestScopedPtr) { |
| MyClass::ResetCount(); |
| ASSERT_EQ(0, MyClass::instance_count()); |
| ObjectPool<MyClass> pool; |
| { |
| ObjectPool<MyClass>::scoped_ptr sptr( |
| pool.make_scoped_ptr(pool.Construct())); |
| ASSERT_EQ(1, MyClass::instance_count()); |
| } |
| ASSERT_EQ(0, MyClass::instance_count()); |
| } |
| |
| } // namespace kudu |