71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#pragma once
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#include "td/utils/port/config.h"
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#include "td/utils/common.h"
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#include "td/utils/port/detail/NativeFd.h"
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#include "td/utils/port/detail/PollableFd.h"
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#include "td/utils/port/Stat.h"
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#include "td/utils/Slice.h"
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#include "td/utils/Status.h"
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namespace td {
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namespace detail {
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class FileFdImpl;
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}
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class FileFd {
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public:
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FileFd();
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FileFd(FileFd &&);
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FileFd &operator=(FileFd &&);
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~FileFd();
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FileFd(const FileFd &) = delete;
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FileFd &operator=(const FileFd &) = delete;
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enum Flags : int32 { Write = 1, Read = 2, Truncate = 4, Create = 8, Append = 16, CreateNew = 32 };
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static Result<FileFd> open(CSlice filepath, int32 flags, int32 mode = 0600) TD_WARN_UNUSED_RESULT;
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static FileFd from_native_fd(NativeFd fd) TD_WARN_UNUSED_RESULT;
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Result<size_t> write(Slice slice) TD_WARN_UNUSED_RESULT;
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Result<size_t> read(MutableSlice slice) TD_WARN_UNUSED_RESULT;
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Result<size_t> pwrite(Slice slice, int64 offset) TD_WARN_UNUSED_RESULT;
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Result<size_t> pread(MutableSlice slice, int64 offset) const TD_WARN_UNUSED_RESULT;
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enum class LockFlags { Write, Read, Unlock };
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Status lock(LockFlags flags, int32 max_tries = 1) TD_WARN_UNUSED_RESULT;
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PollableFdInfo &get_poll_info();
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const PollableFdInfo &get_poll_info() const;
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void close();
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bool empty() const;
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int64 get_size();
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Stat stat();
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Status sync() TD_WARN_UNUSED_RESULT;
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Status seek(int64 position) TD_WARN_UNUSED_RESULT;
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Status truncate_to_current_position(int64 current_position) TD_WARN_UNUSED_RESULT;
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const NativeFd &get_native_fd() const;
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NativeFd move_as_native_fd();
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private:
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std::unique_ptr<detail::FileFdImpl> impl_;
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explicit FileFd(std::unique_ptr<detail::FileFdImpl> impl);
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};
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} // namespace td
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