mirror of https://github.com/odrling/Aegisub
68 lines
2.2 KiB
C++
68 lines
2.2 KiB
C++
// Copyright (c) 2014, Thomas Goyne <plorkyeran@aegisub.org>
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//
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// Permission to use, copy, modify, and 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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// Aegisub Project http://www.aegisub.org/
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#include <libaegisub/fs_fwd.h>
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#include <boost/interprocess/detail/os_file_functions.hpp>
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#include <cstdint>
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#include <memory>
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namespace agi {
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// boost::interprocess::file_mapping is awesome and uses CreateFileA on Windows
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class file_mapping {
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boost::interprocess::file_handle_t handle;
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public:
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file_mapping(fs::path const& filename, bool temporary);
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~file_mapping();
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boost::interprocess::mapping_handle_t get_mapping_handle() const {
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return boost::interprocess::ipcdetail::mapping_handle_from_file_handle(handle);
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}
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};
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class read_file_mapping {
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file_mapping file;
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std::unique_ptr<boost::interprocess::mapped_region> region;
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uint64_t mapping_start = 0;
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uint64_t file_size = 0;
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public:
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read_file_mapping(fs::path const& filename);
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~read_file_mapping();
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uint64_t size() const { return file_size; }
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const char *read(int64_t offset, uint64_t length);
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const char *read(); // Map the entire file
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};
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class temp_file_mapping {
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file_mapping file;
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uint64_t file_size = 0;
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std::unique_ptr<boost::interprocess::mapped_region> read_region;
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uint64_t read_mapping_start = 0;
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std::unique_ptr<boost::interprocess::mapped_region> write_region;
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uint64_t write_mapping_start = 0;
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public:
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temp_file_mapping(fs::path const& filename, uint64_t size);
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~temp_file_mapping();
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const char *read(int64_t offset, uint64_t length);
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char *write(int64_t offset, uint64_t length);
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};
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}
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