| 1 | /* |
| 2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * This source code is licensed under both the BSD-style license (found in the |
| 6 | * LICENSE file in the root directory of this source tree) and the GPLv2 (found |
| 7 | * in the COPYING file in the root directory of this source tree). |
| 8 | */ |
| 9 | #include "utils/ResourcePool.h" |
| 10 | |
| 11 | #include <gtest/gtest.h> |
| 12 | #include <atomic> |
| 13 | #include <thread> |
| 14 | |
| 15 | using namespace pzstd; |
| 16 | |
| 17 | TEST(ResourcePool, FullTest) { |
| 18 | unsigned numCreated = 0; |
| 19 | unsigned numDeleted = 0; |
| 20 | { |
| 21 | ResourcePool<int> pool( |
| 22 | [&numCreated] { ++numCreated; return new int{5}; }, |
| 23 | [&numDeleted](int *x) { ++numDeleted; delete x; }); |
| 24 | |
| 25 | { |
| 26 | auto i = pool.get(); |
| 27 | EXPECT_EQ(5, *i); |
| 28 | *i = 6; |
| 29 | } |
| 30 | { |
| 31 | auto i = pool.get(); |
| 32 | EXPECT_EQ(6, *i); |
| 33 | auto j = pool.get(); |
| 34 | EXPECT_EQ(5, *j); |
| 35 | *j = 7; |
| 36 | } |
| 37 | { |
| 38 | auto i = pool.get(); |
| 39 | EXPECT_EQ(6, *i); |
| 40 | auto j = pool.get(); |
| 41 | EXPECT_EQ(7, *j); |
| 42 | } |
| 43 | } |
| 44 | EXPECT_EQ(2, numCreated); |
| 45 | EXPECT_EQ(numCreated, numDeleted); |
| 46 | } |
| 47 | |
| 48 | TEST(ResourcePool, ThreadSafe) { |
| 49 | std::atomic<unsigned> numCreated{0}; |
| 50 | std::atomic<unsigned> numDeleted{0}; |
| 51 | { |
| 52 | ResourcePool<int> pool( |
| 53 | [&numCreated] { ++numCreated; return new int{0}; }, |
| 54 | [&numDeleted](int *x) { ++numDeleted; delete x; }); |
| 55 | auto push = [&pool] { |
| 56 | for (int i = 0; i < 100; ++i) { |
| 57 | auto x = pool.get(); |
| 58 | ++*x; |
| 59 | } |
| 60 | }; |
| 61 | std::thread t1{push}; |
| 62 | std::thread t2{push}; |
| 63 | t1.join(); |
| 64 | t2.join(); |
| 65 | |
| 66 | auto x = pool.get(); |
| 67 | auto y = pool.get(); |
| 68 | EXPECT_EQ(200, *x + *y); |
| 69 | } |
| 70 | EXPECT_GE(2, numCreated); |
| 71 | EXPECT_EQ(numCreated, numDeleted); |
| 72 | } |