fe4608386e
"nextpnr.h" is no longer the god header. Important improvements: - Functions in log.h can be used without including BaseCtx/Arch/Context. This means that log_X functions can be called without included "nextpnr.h" - NPNR_ASSERT can be used without including "nextpnr.h" by including "nextpnr_assertions.h". This allows NPNR_ASSERT to be used safely in any header file. - Types defined in "archdefs.h" are now available without including BaseCtx/Arch/Context. This means that utility classes that will be used inside of BaseCtx/Arch/Context can be defined safely in a self-contained header. Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
113 lines
3.0 KiB
C++
113 lines
3.0 KiB
C++
/*
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* nextpnr -- Next Generation Place and Route
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*
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* Copyright (C) 2018 Clifford Wolf <clifford@symbioticeda.com>
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* Copyright (C) 2018 Serge Bazanski <q3k@symbioticeda.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#ifndef SSO_ARRAY_H
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#define SSO_ARRAY_H
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#include <cstdint>
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#include "nextpnr_assertions.h"
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#include "nextpnr_namespaces.h"
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NEXTPNR_NAMESPACE_BEGIN
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// An small size optimised array that is statically allocated when the size is N or less; heap allocated otherwise
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template <typename T, std::size_t N> class SSOArray
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{
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private:
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union
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{
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T data_static[N];
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T *data_heap;
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};
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std::size_t m_size;
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inline bool is_heap() const { return (m_size > N); }
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void alloc()
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{
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if (is_heap()) {
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data_heap = new T[m_size];
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}
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}
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public:
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T *data() { return is_heap() ? data_heap : data_static; }
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const T *data() const { return is_heap() ? data_heap : data_static; }
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std::size_t size() const { return m_size; }
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T *begin() { return data(); }
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T *end() { return data() + m_size; }
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const T *begin() const { return data(); }
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const T *end() const { return data() + m_size; }
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SSOArray() : m_size(0){};
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SSOArray(std::size_t size, const T &init = T()) : m_size(size)
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{
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alloc();
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std::fill(begin(), end(), init);
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}
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SSOArray(const SSOArray &other) : m_size(other.size())
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{
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alloc();
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std::copy(other.begin(), other.end(), begin());
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}
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template <typename Tother> SSOArray(const Tother &other) : m_size(other.size())
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{
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alloc();
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std::copy(other.begin(), other.end(), begin());
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}
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~SSOArray()
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{
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if (is_heap()) {
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delete[] data_heap;
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}
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}
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bool operator==(const SSOArray &other) const
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{
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if (size() != other.size())
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return false;
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return std::equal(begin(), end(), other.begin());
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}
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bool operator!=(const SSOArray &other) const
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{
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if (size() != other.size())
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return true;
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return !std::equal(begin(), end(), other.begin());
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}
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T &operator[](std::size_t idx)
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{
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NPNR_ASSERT(idx < m_size);
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return data()[idx];
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}
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const T &operator[](std::size_t idx) const
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{
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NPNR_ASSERT(idx < m_size);
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return data()[idx];
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}
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};
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NEXTPNR_NAMESPACE_END
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#endif
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