// // Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018 // // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) // #pragma once #include "td/utils/port/config.h" #include "td/utils/common.h" #include "td/utils/port/Fd.h" #include "td/utils/port/Stat.h" #include "td/utils/Slice.h" #include "td/utils/Status.h" namespace td { class FileFd { public: FileFd() = default; enum Flags : int32 { Write = 1, Read = 2, Truncate = 4, Create = 8, Append = 16, CreateNew = 32 }; const Fd &get_fd() const; Fd &get_fd(); static Result<FileFd> open(CSlice filepath, int32 flags, int32 mode = 0600) TD_WARN_UNUSED_RESULT; Result<size_t> write(Slice slice) TD_WARN_UNUSED_RESULT; Result<size_t> read(MutableSlice slice) TD_WARN_UNUSED_RESULT; Result<size_t> pwrite(Slice slice, int64 offset) TD_WARN_UNUSED_RESULT; Result<size_t> pread(MutableSlice slice, int64 offset) TD_WARN_UNUSED_RESULT; enum class LockFlags { Write, Read, Unlock }; Status lock(LockFlags flags, int32 max_tries = 1) TD_WARN_UNUSED_RESULT; void close(); bool empty() const; int32 get_flags() const; void update_flags(Fd::Flags mask); int64 get_size(); Stat stat(); Status sync() TD_WARN_UNUSED_RESULT; Status seek(int64 position) TD_WARN_UNUSED_RESULT; Status truncate_to_current_position(int64 current_position) TD_WARN_UNUSED_RESULT; #if TD_PORT_POSIX int get_native_fd() const; #endif private: Fd fd_; }; } // namespace td