2 * Copyright 2013-present Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include <folly/Memory.h>
19 #include <type_traits>
22 #include <glog/logging.h>
24 #include <folly/String.h>
25 #include <folly/memory/Arena.h>
26 #include <folly/portability/GTest.h>
28 using namespace folly;
30 TEST(aligned_malloc, examples) {
31 auto trial = [](size_t align) {
32 auto const ptr = aligned_malloc(1, align);
33 return (aligned_free(ptr), uintptr_t(ptr));
36 if (!kIsSanitize) { // asan allocator raises SIGABRT instead
37 EXPECT_EQ(EINVAL, (trial(2), errno)) << "too small";
38 EXPECT_EQ(EINVAL, (trial(513), errno)) << "not power of two";
41 EXPECT_EQ(0, trial(512) % 512);
42 EXPECT_EQ(0, trial(8192) % 8192);
45 TEST(make_unique, compatible_with_std_make_unique) {
46 // HACK: To enforce that `folly::` is imported here.
47 to_shared_ptr(std::unique_ptr<std::string>());
50 make_unique<string>("hello, world");
53 TEST(to_weak_ptr, example) {
54 auto s = std::make_shared<int>(17);
55 EXPECT_EQ(1, s.use_count());
56 EXPECT_EQ(2, (to_weak_ptr(s).lock(), s.use_count())) << "lvalue";
57 EXPECT_EQ(3, (to_weak_ptr(decltype(s)(s)).lock(), s.use_count())) << "rvalue";
60 TEST(allocate_sys_buffer, compiles) {
61 auto buf = allocate_sys_buffer(256);
62 // Freed at the end of the scope.
65 template <std::size_t> struct T {};
66 template <std::size_t> struct S {};
67 template <std::size_t> struct P {};
69 TEST(as_stl_allocator, sanity_check) {
70 typedef StlAllocator<SysArena, int> stl_arena_alloc;
72 EXPECT_TRUE((std::is_same<
73 as_stl_allocator<int, SysArena>::type,
77 EXPECT_TRUE((std::is_same<
78 as_stl_allocator<int, stl_arena_alloc>::type,
83 TEST(StlAllocator, void_allocator) {
84 typedef StlAllocator<SysArena, void> void_allocator;
86 void_allocator valloc(&arena);
88 typedef void_allocator::rebind<int>::other int_allocator;
89 int_allocator ialloc(valloc);
91 auto i = std::allocate_shared<int>(ialloc, 10);
92 ASSERT_NE(nullptr, i.get());
95 ASSERT_EQ(nullptr, i.get());
98 TEST(rebind_allocator, sanity_check) {
99 std::allocator<long> alloc;
101 auto i = std::allocate_shared<int>(
102 rebind_allocator<int, decltype(alloc)>(alloc), 10
104 ASSERT_NE(nullptr, i.get());
107 ASSERT_EQ(nullptr, i.get());
109 auto d = std::allocate_shared<double>(
110 rebind_allocator<double>(alloc), 5.6
112 ASSERT_NE(nullptr, d.get());
115 ASSERT_EQ(nullptr, d.get());
117 auto s = std::allocate_shared<std::string>(
118 rebind_allocator<std::string>(alloc), "HELLO, WORLD"
120 ASSERT_NE(nullptr, s.get());
121 EXPECT_EQ("HELLO, WORLD", *s);
123 ASSERT_EQ(nullptr, s.get());
126 template <typename C>
127 static void test_enable_shared_from_this(std::shared_ptr<C> sp) {
128 ASSERT_EQ(1l, sp.use_count());
130 // Test shared_from_this().
131 std::shared_ptr<C> sp2 = sp->shared_from_this();
134 // Test weak_from_this().
135 std::weak_ptr<C> wp = sp->weak_from_this();
136 ASSERT_EQ(sp, wp.lock());
139 ASSERT_EQ(nullptr, wp.lock());
141 // Test shared_from_this() and weak_from_this() on object not owned by a
142 // shared_ptr. Undefined in C++14 but well-defined in C++17. Also known to
143 // work with libstdc++ >= 20150123. Feel free to add other standard library
144 // versions where the behavior is known.
145 #if __cplusplus >= 201700L || \
146 __GLIBCXX__ >= 20150123L
148 ASSERT_THROW(stack_resident.shared_from_this(), std::bad_weak_ptr);
149 ASSERT_TRUE(stack_resident.weak_from_this().expired());
153 TEST(enable_shared_from_this, compatible_with_std_enable_shared_from_this) {
154 // Compile-time compatibility.
155 class C_std : public std::enable_shared_from_this<C_std> {};
156 class C_folly : public folly::enable_shared_from_this<C_folly> {};
158 noexcept(std::declval<C_std>().shared_from_this()) ==
159 noexcept(std::declval<C_folly>().shared_from_this()), "");
161 noexcept(std::declval<C_std const>().shared_from_this()) ==
162 noexcept(std::declval<C_folly const>().shared_from_this()), "");
163 static_assert(noexcept(std::declval<C_folly>().weak_from_this()), "");
164 static_assert(noexcept(std::declval<C_folly const>().weak_from_this()), "");
166 // Runtime compatibility.
167 test_enable_shared_from_this(std::make_shared<C_folly>());
168 test_enable_shared_from_this(std::make_shared<C_folly const>());