tdlight/tdutils/td/utils/port/detail/NativeFd.cpp

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//
// 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)
//
#include "td/utils/port/detail/NativeFd.h"
#include "td/utils/format.h"
#include "td/utils/logging.h"
#include "td/utils/Status.h"
#if TD_PORT_POSIX
#include <fcntl.h>
#include <unistd.h>
#endif
namespace td {
NativeFd::NativeFd(Fd fd) : fd_(fd) {
VLOG(fd) << *this << " create";
}
NativeFd::NativeFd(Fd fd, bool nolog) : fd_(fd) {
}
#if TD_PORT_WINDOWS
NativeFd::NativeFd(Socket socket) : fd_(reinterpret_cast<Fd>(socket)), is_socket_(true) {
VLOG(fd) << *this << " create";
}
#endif
NativeFd::~NativeFd() {
close();
}
NativeFd::operator bool() const {
return fd_.get() != empty_fd();
}
NativeFd::Fd NativeFd::empty_fd() {
#if TD_PORT_POSIX
return -1;
#elif TD_PORT_WINDOWS
return INVALID_HANDLE_VALUE;
#endif
}
NativeFd::Fd NativeFd::fd() const {
return fd_.get();
}
NativeFd::Socket NativeFd::socket() const {
#if TD_PORT_POSIX
return fd();
#elif TD_PORT_WINDOWS
CHECK(is_socket_);
return reinterpret_cast<Socket>(fd_.get());
#endif
}
Status NativeFd::set_is_blocking(bool is_blocking) const {
#if TD_PORT_POSIX
auto old_flags = fcntl(fd(), F_GETFL);
if (old_flags == -1) {
return OS_SOCKET_ERROR("Failed to get socket flags");
}
auto new_flags = is_blocking ? old_flags & ~O_NONBLOCK : old_flags | O_NONBLOCK;
if (new_flags != old_flags && fcntl(fd(), F_SETFL, new_flags) == -1) {
return OS_SOCKET_ERROR("Failed to set socket flags");
}
return Status::OK();
#elif TD_PORT_WINDOWS
return set_is_blocking_unsafe(is_blocking);
#endif
}
Status NativeFd::set_is_blocking_unsafe(bool is_blocking) const {
#if TD_PORT_POSIX
if (fcntl(fd(), F_SETFL, is_blocking ? 0 : O_NONBLOCK) == -1) {
#elif TD_PORT_WINDOWS
u_long mode = is_blocking;
if (ioctlsocket(socket(), FIONBIO, &mode) != 0) {
#endif
return OS_SOCKET_ERROR("Failed to change socket flags");
}
return Status::OK();
}
Status NativeFd::duplicate(const NativeFd &to) const {
#if TD_PORT_POSIX
CHECK(*this);
CHECK(to);
if (dup2(fd(), to.fd()) == -1) {
return OS_ERROR("Failed to duplicate file descriptor");
}
return Status::OK();
#elif TD_PORT_WINDOWS
return Status::Error("Not supported");
#endif
}
void NativeFd::close() {
if (!*this) {
return;
}
VLOG(fd) << *this << " close";
#if TD_PORT_WINDOWS
if (is_socket_ ? closesocket(socket()) : !CloseHandle(fd())) {
#elif TD_PORT_POSIX
if (::close(fd()) < 0) {
#endif
auto error = OS_ERROR("Close fd");
LOG(ERROR) << error;
}
fd_ = {};
}
NativeFd::Fd NativeFd::release() {
VLOG(fd) << *this << " release";
auto res = fd_.get();
fd_ = {};
return res;
}
StringBuilder &operator<<(StringBuilder &sb, const NativeFd &fd) {
return sb << tag("fd", fd.fd());
}
} // namespace td