84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2010-2016 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef __UTIL_IO_POSIX_HPP
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#define __UTIL_IO_POSIX_HPP
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#include "posix/fd.hpp"
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#include "view.hpp"
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#include <type_traits>
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#include <experimental/filesystem>
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#include <sys/mman.h>
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#include <fcntl.h>
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namespace util {
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namespace detail::posix {
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class mapped_file {
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public:
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mapped_file (const std::experimental::filesystem::path&, int fflags = O_RDONLY | O_BINARY, int mflags = PROT_READ);
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mapped_file (const util::posix::fd&, int mflags = PROT_READ);
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mapped_file (const mapped_file&) = delete;
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mapped_file& operator= (const mapped_file&) = delete;
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~mapped_file ();
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bool empty (void) const;
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/// returns the total allocated mapped region in bytes.
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///
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/// result is typed size_t (rather than a signed type) because we
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/// often use this in conjunction with sizeof and packed structure.
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/// it is greatly simpler to cast to signed where it's actually
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/// required rather than the other way around.
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size_t size (void) const;
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const uint8_t* data (void) const &;
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uint8_t* data (void) &;
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uint8_t* begin (void) &;
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uint8_t* end (void) &;
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const uint8_t* begin (void) const &;
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const uint8_t* end (void) const &;
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const uint8_t* cbegin (void) const &;
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const uint8_t* cend (void) const &;
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template <typename T>
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util::view<std::add_const_t<T>*>
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as_view () const &;
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template <typename T>
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util::view<T*>
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as_view () &;
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private:
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uint8_t *m_data;
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size_t m_size;
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};
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}
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typedef detail::posix::mapped_file mapped_file;
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}
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#include "io_posix.ipp"
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#endif
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