85 lines
1.7 KiB
C++
85 lines
1.7 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 2015-2016 Danny Robson <danny@nerdcruft.net>
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*/
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#include "stack.hpp"
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#include "../debug/assert.hpp"
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#include "../pointer.hpp"
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#include "../cast.hpp"
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using cruft::alloc::stack;
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///////////////////////////////////////////////////////////////////////////////
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stack::stack (cruft::view<std::byte*> _data):
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m_begin (_data.begin ()),
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m_end (_data.end ()),
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m_cursor (m_begin)
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{
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CHECK_LE (m_begin, m_end);
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}
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//-----------------------------------------------------------------------------
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std::byte*
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stack::begin (void)
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{
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return m_begin;
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}
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//-----------------------------------------------------------------------------
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const std::byte*
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stack::begin (void) const
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{
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return m_begin;
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}
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//-----------------------------------------------------------------------------
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size_t
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stack::offset (const void *_ptr) const
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{
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auto ptr = reinterpret_cast<const std::byte*> (_ptr);
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CHECK_GE (ptr, m_begin);
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return ptr - m_begin;
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}
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//-----------------------------------------------------------------------------
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void
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stack::reset (void)
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{
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m_cursor = m_begin;
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}
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///////////////////////////////////////////////////////////////////////////////
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size_t
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stack::capacity (void) const
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{
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return m_end - m_begin;
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}
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//-----------------------------------------------------------------------------
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size_t
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stack::used (void) const
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{
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return m_cursor - m_begin;
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}
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//-----------------------------------------------------------------------------
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size_t
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stack::remain (void) const
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{
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return capacity () - used ();
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}
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