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_osyncstream;
17
18 // basic_osyncstream(streambuf_type* os, const Allocator& allocator);
19
20 #include <cassert>
21 #include <concepts>
22 #include <syncstream>
23 #include <sstream>
24
25 #include "test_macros.h"
26 #include "constexpr_char_traits.h"
27 #include "test_allocator.h"
28
29 template <class CharT>
test()30 void test() {
31 {
32 using OS = std::basic_osyncstream<CharT>;
33 using W = std::basic_stringbuf<CharT>;
34
35 const std::allocator<CharT> alloc;
36 {
37 OS os = {nullptr, alloc};
38 assert(os.get_wrapped() == nullptr);
39 assert(os.rdbuf()->get_wrapped() == nullptr);
40 assert(os.rdbuf()->get_allocator() == alloc);
41 }
42 {
43 W w;
44 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
45 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
46 #endif
47 {
48 OS os = {&w, alloc};
49 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
50 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
51 #endif
52 assert(os.get_wrapped() == &w);
53 assert(os.rdbuf()->get_wrapped() == &w);
54 assert(os.rdbuf()->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 OS = std::basic_osyncstream<CharT, constexpr_char_traits<CharT>>;
64 using W = std::basic_stringbuf<CharT, constexpr_char_traits<CharT>>;
65
66 const std::allocator<CharT> alloc;
67 {
68 OS os = {nullptr, alloc};
69 assert(os.get_wrapped() == nullptr);
70 assert(os.rdbuf()->get_wrapped() == nullptr);
71 assert(os.rdbuf()->get_allocator() == alloc);
72 }
73 {
74 W w;
75 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
76 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
77 #endif
78 {
79 OS os = {&w, alloc};
80 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
81 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
82 #endif
83 assert(os.get_wrapped() == &w);
84 assert(os.rdbuf()->get_wrapped() == &w);
85 assert(os.rdbuf()->get_allocator() == alloc);
86 }
87 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
88 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
89 #endif
90 }
91 }
92
93 {
94 using OS = std::basic_osyncstream<CharT, constexpr_char_traits<CharT>, test_allocator<CharT>>;
95 using W = std::basic_stringbuf<CharT, constexpr_char_traits<CharT>, test_allocator<CharT>>;
96
97 const test_allocator<CharT> alloc;
98 {
99 OS os = {nullptr, alloc};
100 assert(os.get_wrapped() == nullptr);
101 assert(os.rdbuf()->get_wrapped() == nullptr);
102 assert(os.rdbuf()->get_allocator() == alloc);
103 }
104 {
105 W w;
106 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
107 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
108 #endif
109 {
110 OS os = {&w, alloc};
111 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
112 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
113 #endif
114 assert(os.get_wrapped() == &w);
115 assert(os.rdbuf()->get_wrapped() == &w);
116 assert(os.rdbuf()->get_allocator() == alloc);
117 }
118 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
119 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
120 #endif
121 }
122 }
123 }
124
main(int,char **)125 int main(int, char**) {
126 test<char>();
127 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
128 test<wchar_t>();
129 #endif
130
131 return 0;
132 }
133