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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2025
//
// 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/logging.h"
#include "td/utils/Status.h"
#include "td/utils/StringBuilder.h"
namespace td {
extern int VERBOSITY_NAME(fd);
class NativeFd {
public:
#if TD_PORT_POSIX
using Fd = int;
using Socket = int;
#elif TD_PORT_WINDOWS
using Fd = HANDLE;
using Socket = SOCKET;
#endif
NativeFd() = default;
explicit NativeFd(Fd fd);
NativeFd(Fd fd, bool nolog);
#if TD_PORT_WINDOWS
explicit NativeFd(Socket socket);
#endif
NativeFd(const NativeFd &) = delete;
NativeFd &operator=(const NativeFd &) = delete;
NativeFd(NativeFd &&other) noexcept;
NativeFd &operator=(NativeFd &&other) noexcept;
~NativeFd();
explicit operator bool() const noexcept;
Fd fd() const;
Socket socket() const;
Status set_is_blocking(bool is_blocking) const;
Status set_is_blocking_unsafe(bool is_blocking) const; // may drop other Fd flags on non-Windows
Status duplicate(const NativeFd &to) const;
Result<uint32> maximize_snd_buffer(uint32 max_size = 0) const;
Result<uint32> maximize_rcv_buffer(uint32 max_size = 0) const;
void close();
Fd release();
Status validate() const;
private:
static Fd empty_fd();
Fd fd_ = empty_fd();
#if TD_PORT_WINDOWS
bool is_socket_{false};
#endif
static constexpr uint32 DEFAULT_MAX_SND_BUFFER_SIZE = (1 << 24);
static constexpr uint32 DEFAULT_MAX_RCV_BUFFER_SIZE = (1 << 24);
};
StringBuilder &operator<<(StringBuilder &sb, const NativeFd &fd);
} // namespace td
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