| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| // UNSUPPORTED: no-localization |
| // UNSUPPORTED: libcpp-has-no-experimental-syncstream |
| |
| // <syncstream> |
| |
| // template <class charT, class traits, class Allocator> |
| // class basic_syncbuf; |
| |
| // basic_syncbuf(streambuf_type* obuf, const Allocator&); |
| |
| #include <cassert> |
| #include <concepts> |
| #include <syncstream> |
| |
| #include "test_macros.h" |
| #include "constexpr_char_traits.h" |
| #include "test_allocator.h" |
| |
| template <class CharT> |
| void test() { |
| { |
| using Buf = std::basic_syncbuf<CharT>; |
| const std::allocator<CharT> alloc; |
| { |
| Buf buf = {nullptr, alloc}; |
| assert(buf.get_wrapped() == nullptr); |
| assert(buf.get_allocator() == alloc); |
| } |
| { |
| Buf w; |
| #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS) |
| assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0); |
| #endif |
| { |
| Buf buf = {&w, alloc}; |
| #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS) |
| assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1); |
| #endif |
| assert(buf.get_wrapped() == &w); |
| assert(buf.get_allocator() == alloc); |
| } |
| #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS) |
| assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0); |
| #endif |
| } |
| } |
| |
| { |
| using Buf = std::basic_syncbuf<CharT, constexpr_char_traits<CharT>>; |
| const std::allocator<CharT> alloc; |
| { |
| Buf buf = {nullptr, alloc}; |
| assert(buf.get_wrapped() == nullptr); |
| assert(buf.get_allocator() == alloc); |
| } |
| { |
| Buf w; |
| #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS) |
| assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0); |
| #endif |
| { |
| Buf buf{&w, alloc}; |
| #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS) |
| assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1); |
| #endif |
| assert(buf.get_wrapped() == &w); |
| assert(buf.get_allocator() == alloc); |
| } |
| #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS) |
| assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0); |
| #endif |
| } |
| } |
| |
| { |
| using Buf = std::basic_syncbuf<CharT, constexpr_char_traits<CharT>, test_allocator<CharT>>; |
| test_allocator<CharT> alloc{42}; |
| { |
| Buf buf = {nullptr, alloc}; |
| assert(buf.get_wrapped() == nullptr); |
| assert(buf.get_allocator() == alloc); |
| } |
| { |
| Buf w; |
| #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS) |
| assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0); |
| #endif |
| { |
| Buf buf{&w, alloc}; |
| #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS) |
| assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1); |
| #endif |
| assert(buf.get_wrapped() == &w); |
| assert(buf.get_allocator() == alloc); |
| } |
| #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS) |
| assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0); |
| #endif |
| } |
| } |
| } |
| |
| int main(int, char**) { |
| test<char>(); |
| #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
| test<wchar_t>(); |
| #endif |
| |
| return 0; |
| } |