Danny Robson
f6056153e3
This places, at long last, the core library code into the same namespace as the extended library code.
133 lines
2.8 KiB
C++
133 lines
2.8 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 2016 Danny Robson <danny@nerdcruft.net>
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*/
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#include "map.hpp"
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#include "posix/except.hpp"
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using cruft::posix::map;
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///////////////////////////////////////////////////////////////////////////////
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map::map (size_t size, int prot, int flags):
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m_addr (mmap (nullptr, size, prot, flags, -1, 0)),
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m_size (size)
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{
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if (MAP_FAILED == m_addr)
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::cruft::posix::error::throw_code ();
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}
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//-----------------------------------------------------------------------------
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map::map (size_t size, int prot, int flags, const fd &src, off_t offset):
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m_addr (mmap (nullptr, size, prot, flags, src, offset)),
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m_size (size)
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{
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if (MAP_FAILED == m_addr)
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::cruft::posix::error::throw_code ();
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}
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//-----------------------------------------------------------------------------
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map::map (map &&rhs) noexcept:
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m_addr (MAP_FAILED),
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m_size (rhs.m_size)
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{
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std::swap (m_addr, rhs.m_addr);
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}
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//-----------------------------------------------------------------------------
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map::~map ()
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{
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if (MAP_FAILED == m_addr)
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return;
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if (munmap (m_addr, m_size))
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::cruft::posix::error::throw_code ();
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}
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//-----------------------------------------------------------------------------
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map&
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map::operator= (map &&rhs) noexcept
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{
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std::swap (m_addr, rhs.m_addr);
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std::swap (m_size, rhs.m_size);
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return *this;
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}
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///////////////////////////////////////////////////////////////////////////////
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uint8_t*
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map::begin (void)
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{
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return static_cast<uint8_t*> (m_addr);
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}
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//-----------------------------------------------------------------------------
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uint8_t*
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map::end (void)
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{
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return static_cast<uint8_t*> (m_addr) + m_size;
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}
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///////////////////////////////////////////////////////////////////////////////
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void*
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map::data (void)
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{
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return m_addr;
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}
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//-----------------------------------------------------------------------------
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const void*
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map::data (void) const
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{
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return m_addr;
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}
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///////////////////////////////////////////////////////////////////////////////
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bool
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map::empty (void) const
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{
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return size () == 0;
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}
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//-----------------------------------------------------------------------------
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size_t
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map::size (void) const
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{
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return m_size;
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}
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//-----------------------------------------------------------------------------
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void
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map::resize (size_t newsize, resize_t op)
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{
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int flags = 0;
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switch (op) {
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case resize_t::MOVE:
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flags = flags | MREMAP_MAYMOVE;
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break;
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case resize_t::NOMOVE:
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break;
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}
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auto res = mremap (m_addr, m_size, newsize, flags);
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if (res == MAP_FAILED)
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::cruft::posix::error::throw_code ();
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}
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