| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2019 Vinnie Falco (vinnie.falco@gmail.com) | ||
| 3 | // | ||
| 4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| 5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| 6 | // | ||
| 7 | // Official repository: https://github.com/boostorg/json | ||
| 8 | // | ||
| 9 | |||
| 10 | #ifndef BOOST_JSON_DEFAULT_RESOURCE_HPP | ||
| 11 | #define BOOST_JSON_DEFAULT_RESOURCE_HPP | ||
| 12 | |||
| 13 | #include <boost/json/detail/config.hpp> | ||
| 14 | #include <boost/container/pmr/memory_resource.hpp> | ||
| 15 | |||
| 16 | namespace boost { | ||
| 17 | namespace json { | ||
| 18 | namespace detail { | ||
| 19 | |||
| 20 | #ifdef _MSC_VER | ||
| 21 | #pragma warning(push) | ||
| 22 | #pragma warning(disable: 4251) // class needs to have dll-interface to be used by clients of class | ||
| 23 | #pragma warning(disable: 4275) // non dll-interface class used as base for dll-interface class | ||
| 24 | #endif | ||
| 25 | |||
| 26 | // A simple memory resource that uses operator new and delete. | ||
| 27 | class | ||
| 28 | BOOST_SYMBOL_VISIBLE | ||
| 29 | BOOST_JSON_DECL | ||
| 30 | default_resource final | ||
| 31 | : public container::pmr::memory_resource | ||
| 32 | { | ||
| 33 | union holder; | ||
| 34 | |||
| 35 | #ifndef BOOST_JSON_WEAK_CONSTINIT | ||
| 36 | # ifndef BOOST_JSON_NO_DESTROY | ||
| 37 | static holder instance_; | ||
| 38 | # else | ||
| 39 | BOOST_JSON_NO_DESTROY | ||
| 40 | static default_resource instance_; | ||
| 41 | # endif | ||
| 42 | #endif | ||
| 43 | |||
| 44 | public: | ||
| 45 | static | ||
| 46 | container::pmr::memory_resource* | ||
| 47 | 531052 | get() noexcept | |
| 48 | { | ||
| 49 | #ifdef BOOST_JSON_WEAK_CONSTINIT | ||
| 50 | static default_resource instance_; | ||
| 51 | #endif | ||
| 52 | return reinterpret_cast<memory_resource*>( | ||
| 53 | reinterpret_cast<std::uintptr_t*>( | ||
| 54 | 531052 | &instance_)); | |
| 55 | } | ||
| 56 | |||
| 57 | ~default_resource(); | ||
| 58 | |||
| 59 | void* | ||
| 60 | do_allocate( | ||
| 61 | std::size_t n, | ||
| 62 | std::size_t) override; | ||
| 63 | |||
| 64 | void | ||
| 65 | do_deallocate( | ||
| 66 | void* p, | ||
| 67 | std::size_t, | ||
| 68 | std::size_t) override; | ||
| 69 | |||
| 70 | bool | ||
| 71 | do_is_equal( | ||
| 72 | memory_resource const& mr) const noexcept override; | ||
| 73 | }; | ||
| 74 | |||
| 75 | #ifdef _MSC_VER | ||
| 76 | #pragma warning(pop) | ||
| 77 | #endif | ||
| 78 | |||
| 79 | union default_resource:: | ||
| 80 | holder | ||
| 81 | { | ||
| 82 | #ifndef BOOST_JSON_WEAK_CONSTINIT | ||
| 83 | constexpr | ||
| 84 | #endif | ||
| 85 | holder() | ||
| 86 | : mr() | ||
| 87 | { | ||
| 88 | } | ||
| 89 | |||
| 90 | 39 | ~holder() | |
| 91 | { | ||
| 92 | 39 | } | |
| 93 | |||
| 94 | default_resource mr; | ||
| 95 | }; | ||
| 96 | |||
| 97 | } // detail | ||
| 98 | } // namespace json | ||
| 99 | } // namespace boost | ||
| 100 | |||
| 101 | #endif | ||
| 102 |