include/posixselect.h

   1 /* posixselect.h -- wrapper for select(2) includes and definitions */
   2
   3 /* Copyright (C) 2009 Free Software Foundation, Inc.
   4
   5    This file is part of GNU Bash, the Bourne Again SHell.
   6
   7    Bash is free software: you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation, either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    Bash is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with Bash.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #ifndef _POSIXSELECT_H_
  22 #define _POSIXSELECT_H_
  23
  24 #if defined (FD_SET) && !defined (HAVE_SELECT)
  25 #  define HAVE_SELECT 1
  26 #endif
  27
  28 #if defined (HAVE_SELECT)
  29 #  if !defined (HAVE_SYS_SELECT_H) || !defined (M_UNIX)
  30 #    include <sys/time.h>
  31 #  endif
  32 #endif /* HAVE_SELECT */
  33 #if defined (HAVE_SYS_SELECT_H)
  34 #  include <sys/select.h>
  35 #endif
  36
  37 #ifndef USEC_PER_SEC
  38 #  define USEC_PER_SEC 1000000
  39 #endif
  40
  41 #define USEC_TO_TIMEVAL(us, tv) \
  42 do { \
  43   (tv).tv_sec = (us) / USEC_PER_SEC; \
  44   (tv).tv_usec = (us) % USEC_PER_SEC; \
  45 } while (0)
  46
  47 #endif /* _POSIXSELECT_H_ */