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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2024 IONOS SE
*
* Author: Max Kellermann <max.kellermann@ionos.com>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#ifndef CEPH_MSG_TIMEOUT_H
#define CEPH_MSG_TIMEOUT_H
#include <time.h> // for struct timeval
/**
* Convert the given `struct timeval` to milliseconds.
*
* This is supposed to be used as timeout parameter to system calls
* such as poll() and epoll_wait().
*/
constexpr int
timeout_to_milliseconds(const struct timeval &tv) noexcept
{
return tv.tv_sec * 1000 + tv.tv_usec / 1000;
}
/**
* This overload makes the timeout optional; on nullptr, it returns
* -1.
*/
constexpr int
timeout_to_milliseconds(const struct timeval *tv) noexcept
{
return tv != nullptr ? timeout_to_milliseconds(*tv) : -1;
}
#endif
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