1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // UNSUPPORTED: c++03, c++11, c++14, c++17
10 // UNSUPPORTED: no-localization
11 // UNSUPPORTED: libcpp-has-no-experimental-syncstream
12
13 // <syncstream>
14
15 // template <class charT, class traits, class Allocator>
16 // class basic_syncbuf;
17
18 // basic_syncbuf(basic_syncbuf&& other);
19
20 #include <syncstream>
21 #include <cassert>
22
23 #include "test_macros.h"
24 #include "constexpr_char_traits.h"
25 #include "test_allocator.h"
26
27 template <class CharT>
test()28 void test() {
29 {
30 using Buf = std::basic_syncbuf<CharT>;
31 const std::allocator<CharT> alloc;
32 {
33 Buf b1{nullptr, alloc};
34 Buf b2{std::move(b1)};
35
36 assert(b2.get_wrapped() == nullptr);
37 assert(b2.get_allocator() == alloc);
38 }
39 {
40 Buf w;
41 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
42 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
43 #endif
44 {
45 Buf b1{&w, alloc};
46 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
47 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
48 #endif
49 Buf b2{std::move(b1)};
50 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
51 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
52 #endif
53 assert(b2.get_wrapped() == &w);
54 assert(b2.get_allocator() == alloc);
55 }
56 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
57 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
58 #endif
59 }
60 }
61
62 {
63 using Buf = std::basic_syncbuf<CharT, constexpr_char_traits<CharT>>;
64 const std::allocator<CharT> alloc;
65 {
66 Buf b1{nullptr, alloc};
67 Buf b2{std::move(b1)};
68
69 assert(b2.get_wrapped() == nullptr);
70 assert(b2.get_allocator() == alloc);
71 }
72 {
73 Buf w;
74 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
75 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
76 #endif
77 {
78 Buf b1{&w, alloc};
79 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
80 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
81 #endif
82 Buf b2{std::move(b1)};
83 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
84 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
85 #endif
86 assert(b2.get_wrapped() == &w);
87 assert(b2.get_allocator() == alloc);
88 }
89 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
90 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
91 #endif
92 }
93 }
94
95 {
96 using Buf = std::basic_syncbuf<CharT, constexpr_char_traits<CharT>, test_allocator<CharT>>;
97 test_allocator<CharT> alloc{42};
98 {
99 Buf b1{nullptr, alloc};
100 Buf b2{std::move(b1)};
101
102 assert(b2.get_wrapped() == nullptr);
103 assert(b2.get_allocator() == alloc);
104 }
105 {
106 Buf w;
107 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
108 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
109 #endif
110 {
111 Buf b1{&w, alloc};
112 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
113 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
114 #endif
115 Buf b2{std::move(b1)};
116 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
117 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
118 #endif
119 assert(b2.get_wrapped() == &w);
120 assert(b2.get_allocator() == alloc);
121 }
122 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
123 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
124 #endif
125 }
126 }
127 }
128
main(int,char **)129 int main(int, char**) {
130 test<char>();
131 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
132 test<wchar_t>();
133 #endif
134
135 return 0;
136 }
137