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// explicit basic_syncbuf(streambuf_type* obuf);
19
20#include <cassert>
21#include <concepts>
22#include <syncstream>
23
24#include "test_macros.h"
25#include "constexpr_char_traits.h"
26#include "test_allocator.h"
27
28template <class CharT>
29void test() {
30 {
31 using Buf = std::basic_syncbuf<CharT>;
32
33 static_assert(!std::convertible_to<std::basic_streambuf<CharT>*, Buf>);
34 static_assert(std::constructible_from<Buf, std::basic_streambuf<CharT>*>);
35
36 {
37 Buf buf{nullptr};
38 assert(buf.get_wrapped() == nullptr);
39 assert(buf.get_allocator() == std::allocator<CharT>());
40 }
41 {
42 Buf w;
43#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
44 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
45#endif
46 {
47 Buf buf{&w};
48#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
49 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
50#endif
51 assert(buf.get_wrapped() == &w);
52 assert(buf.get_allocator() == std::allocator<CharT>());
53 }
54#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
55 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
56#endif
57 }
58 }
59
60 {
61 using Buf = std::basic_syncbuf<CharT, constexpr_char_traits<CharT>>;
62
63 static_assert(!std::convertible_to<std::basic_streambuf<CharT, constexpr_char_traits<CharT>>*, Buf>);
64 static_assert(std::constructible_from<Buf, std::basic_streambuf<CharT, constexpr_char_traits<CharT>>*>);
65
66 {
67 Buf buf{nullptr};
68 assert(buf.get_wrapped() == nullptr);
69 assert(buf.get_allocator() == std::allocator<CharT>());
70 }
71 {
72 Buf w;
73#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
74 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
75#endif
76 {
77 Buf buf{&w};
78#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
79 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
80#endif
81 assert(buf.get_wrapped() == &w);
82 assert(buf.get_allocator() == std::allocator<CharT>());
83 }
84#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
85 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
86#endif
87 }
88 }
89
90 {
91 using Buf = std::basic_syncbuf<CharT, constexpr_char_traits<CharT>, test_allocator<CharT>>;
92
93 static_assert(!std::convertible_to<std::basic_streambuf<CharT, constexpr_char_traits<CharT>>*, Buf>);
94 static_assert(std::constructible_from<Buf, std::basic_streambuf<CharT, constexpr_char_traits<CharT>>*>);
95
96 {
97 Buf buf{nullptr};
98 assert(buf.get_wrapped() == nullptr);
99 assert(buf.get_allocator() == test_allocator<CharT>());
100 }
101 {
102 Buf w;
103#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
104 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
105#endif
106 {
107 Buf buf{&w};
108#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
109 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
110#endif
111 assert(buf.get_wrapped() == &w);
112 assert(buf.get_allocator() == test_allocator<CharT>());
113 }
114#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
115 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
116#endif
117 }
118 }
119}
120
121int main(int, char**) {
122 test<char>();
123#ifndef TEST_HAS_NO_WIDE_CHARACTERS
124 test<wchar_t>();
125#endif
126
127 return 0;
128}
129

source code of libcxx/test/std/input.output/syncstream/syncbuf/syncstream.syncbuf.cons/cons.pointer.pass.cpp