a34527617d
Added io_work_scope RAII class to help with scoped lifetime of io_service event loop. Having io_context always increment the ref-count of active I/O operations whenever passed by-value to a function seems like unnecessary atomic operations when compared to selected usages of io_work_scope which generally only need creation for top-level operations.
67 lines
2 KiB
C++
67 lines
2 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Copyright (c) Lewis Baker
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// Licenced under MIT license. See LICENSE.txt for details.
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///////////////////////////////////////////////////////////////////////////////
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#ifndef CPPCORO_READ_WRITE_FILE_HPP_INCLUDED
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#define CPPCORO_READ_WRITE_FILE_HPP_INCLUDED
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#include <cppcoro/readable_file.hpp>
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#include <cppcoro/writable_file.hpp>
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#include <cppcoro/file_share_mode.hpp>
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#include <cppcoro/file_buffering_mode.hpp>
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#include <cppcoro/file_open_mode.hpp>
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#include <experimental/filesystem>
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namespace cppcoro
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{
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class read_write_file : public readable_file, public writable_file
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{
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public:
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/// Open a file for read-write access.
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///
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/// \param ioContext
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/// The I/O context to use when dispatching I/O completion events.
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/// When asynchronous write operations on this file complete the
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/// completion events will be dispatched to an I/O thread associated
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/// with the I/O context.
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///
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/// \param pathMode
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/// Path of the file to open.
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///
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/// \param openMode
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/// Specifies how the file should be opened and how to handle cases
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/// when the file exists or doesn't exist.
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///
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/// \param shareMode
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/// Specifies the access to be allowed on the file concurrently with this file access.
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///
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/// \param bufferingMode
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/// Specifies the modes/hints to provide to the OS that affects the behaviour
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/// of its file buffering.
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///
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/// \return
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/// An object that can be used to write to the file.
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///
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/// \throw std::system_error
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/// If the file could not be opened for write.
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[[nodiscard]]
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static read_write_file open(
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io_service& ioService,
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const std::experimental::filesystem::path& path,
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file_open_mode openMode = file_open_mode::create_or_open,
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file_share_mode shareMode = file_share_mode::none,
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file_buffering_mode bufferingMode = file_buffering_mode::default_);
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protected:
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#if CPPCORO_OS_WINNT
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read_write_file(detail::win32::safe_handle&& fileHandle) noexcept;
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#endif
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};
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}
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#endif
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