TempFailure-timeout.hh

#ifndef NET_TempFailure_h__
#define NET_TempFailure_h__
 
#include <unistd.h>
#include <errno.h>
 
#ifndef TEMP_FAILURE_RETRY
#define TEMP_FAILURE_RETRY(expression) (expression)
#endif
 
#endif // NET_TempFailure_h__
 
 
/*
    const auto deadline =
        std::chrono::steady_clock::now() +
        std::chrono::milliseconds(timeout);
 
    for (;;)
    {
        const auto now = std::chrono::steady_clock::now();
 
        if (now >= deadline)
        {
            // Abort outstanding connection here.
            // More on this below.
 
            restoreFlags();
            errno = ETIMEDOUT;
            return 0;
        }
 
        const auto remaining =
            std::chrono::duration_cast<std::chrono::milliseconds>(
                deadline - now);
 
        pollfd pfd{};
        pfd.fd = m_socket;
        pfd.events = POLLOUT;
 
        const int pollResult =
            ::poll(&pfd, 1, static_cast<int>(remaining.count()));
 
        if (pollResult < 0)
        {
            if (errno == EINTR)
                continue;
 
            const int savedErrno = errno;
            restoreFlags();
            errno = savedErrno;
            throw SocketException("timedConnect failed (poll)");
        }
 
        if (pollResult == 0)
            continue; // deadline check at top
*/