/*

   Unix SMB/Netbios implementation.

   Version 3.0

   Samba select/poll implementation

   Copyright (C) Andrew Tridgell 1992-1998

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/

#include "replace.h"

#include "system/filesys.h"

#include "system/select.h"

#include "lib/util/select.h"

#include "lib/util/time.h"

int sys_poll_intr(struct pollfd *fds, int num_fds, int timeout)

{

  int orig_timeout = timeout;

  struct timespec start;

  int ret;

  clock_gettime_mono(&start);

  while (true) {

    struct timespec now;

    int64_t elapsed;

    ret = poll(fds, num_fds, timeout);

    if (ret != -1) {

      break;

    }

    if (errno != EINTR) {

      break;

    }

    /* Infinite timeout, no need to adjust. */

    if (timeout < 0) {

      continue;

    }

    clock_gettime_mono(&now);

    elapsed = nsec_time_diff(&now, &start) / 1000000;

    timeout = orig_timeout - elapsed;

    /* Unlikely, but might happen eg. when getting traced.

     * Make sure we're not hanging in this case.

     */

    if (timeout < 0) {

      timeout = 0;

    }

  };

  return ret;

}