/* * nextpnr -- Next Generation Place and Route * * Copyright (C) 2018 Clifford Wolf * Copyright (C) 2018 Serge Bazanski * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * */ #ifndef SSO_ARRAY_H #define SSO_ARRAY_H #include #include "nextpnr_assertions.h" #include "nextpnr_namespaces.h" NEXTPNR_NAMESPACE_BEGIN // An small size optimised array that is statically allocated when the size is N or less; heap allocated otherwise template class SSOArray { private: union { T data_static[N]; T *data_heap; }; std::size_t m_size; inline bool is_heap() const { return (m_size > N); } void alloc() { if (is_heap()) { data_heap = new T[m_size]; } } public: T *data() { return is_heap() ? data_heap : data_static; } const T *data() const { return is_heap() ? data_heap : data_static; } std::size_t size() const { return m_size; } T *begin() { return data(); } T *end() { return data() + m_size; } const T *begin() const { return data(); } const T *end() const { return data() + m_size; } SSOArray() : m_size(0){}; SSOArray(std::size_t size, const T &init = T()) : m_size(size) { alloc(); std::fill(begin(), end(), init); } SSOArray(const SSOArray &other) : m_size(other.size()) { alloc(); std::copy(other.begin(), other.end(), begin()); } template SSOArray(const Tother &other) : m_size(other.size()) { alloc(); std::copy(other.begin(), other.end(), begin()); } ~SSOArray() { if (is_heap()) { delete[] data_heap; } } bool operator==(const SSOArray &other) const { if (size() != other.size()) return false; return std::equal(begin(), end(), other.begin()); } bool operator!=(const SSOArray &other) const { if (size() != other.size()) return true; return !std::equal(begin(), end(), other.begin()); } T &operator[](std::size_t idx) { NPNR_ASSERT(idx < m_size); return data()[idx]; } const T &operator[](std::size_t idx) const { NPNR_ASSERT(idx < m_size); return data()[idx]; } }; NEXTPNR_NAMESPACE_END #endif ' href='#n8'>8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145