grammar/detail/recycled.hpp

0001 //
0002 // Copyright (c) 2022 Vinnie Falco (vinnie.falco@gmail.com)
0003 //
0004 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0005 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0006 //
0007 // Official repository: https://github.com/boostorg/url
0008 //
0009
0010 #ifndef BOOST_URL_GRAMMAR_DETAIL_RECYCLED_HPP
0011 #define BOOST_URL_GRAMMAR_DETAIL_RECYCLED_HPP
0012
0013 #include <utility>
0014
0015 namespace boost {
0016 namespace urls {
0017 namespace grammar {
0018 namespace detail {
0019
0020 template<
0021     std::size_t Size,
0022     std::size_t Align>
0023 struct aligned_storage_impl
0024 {
0025     void* addr() noexcept
0026     {
0027         return buf_;
0028     }
0029
0030     void const* addr() const noexcept
0031     {
0032         return buf_;
0033     }
0034
0035 private:
0036     alignas(Align)
0037     unsigned char buf_[Size];
0038 };
0039
0040 constexpr
0041 std::size_t
0042 nearest_pow2(
0043     std::size_t x,
0044     std::size_t f = 0) noexcept
0045 {
0046     return
0047         (f <= (std::size_t(-1)/2))
0048         ? ( x <= f
0049             ? f
0050             : nearest_pow2(x, 2 * f))
0051         : x;
0052 }
0053
0054 //------------------------------------------------
0055
0056 BOOST_URL_DECL
0057 void
0058 recycled_add_impl(
0059     std::size_t) noexcept;
0060
0061 BOOST_URL_DECL
0062 void
0063 recycled_remove_impl(
0064     std::size_t) noexcept;
0065
0066 #ifdef BOOST_URL_REPORT
0067
0068 inline
0069 void
0070 recycled_add(
0071     std::size_t n) noexcept
0072 {
0073     recycled_add_impl(n);
0074 }
0075
0076 inline
0077 void
0078 recycled_remove(
0079     std::size_t n) noexcept
0080 {
0081     recycled_remove_impl(n);
0082 }
0083
0084 #else
0085
0086 inline void recycled_add(
0087     std::size_t) noexcept
0088 {
0089 }
0090 inline void recycled_remove(
0091     std::size_t) noexcept
0092 {
0093 }
0094
0095 #endif
0096
0097 } // detail
0098 } // grammar
0099 } // urls
0100 } // boost
0101
0102 #endif