libgfortran/intrinsics/sleep.c

   1 /* Implementation of the SLEEP intrinsic.
   2    Copyright (C) 2005-2017 Free Software Foundation, Inc.
   3    Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>
   4
   5 This file is part of the GNU Fortran 95 runtime library (libgfortran).
   6
   7 Libgfortran is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU General Public
   9 License as published by the Free Software Foundation; either
  10 version 3 of the License, or (at your option) any later version.
  11
  12 Libgfortran 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 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #include "libgfortran.h"
  27
  28 #ifdef HAVE_UNISTD_H
  29 #include <unistd.h>
  30 #endif
  31
  32 #ifdef __MINGW32__
  33 # include <windows.h>
  34 # undef sleep
  35 # define sleep(x) Sleep(1000*(x))
  36 # define HAVE_SLEEP 1
  37 #endif
  38
  39 /* SUBROUTINE SLEEP(SECONDS)
  40    INTEGER, INTENT(IN) :: SECONDS
  41
  42    A choice had to be made if SECONDS is negative. For g77, this is
  43    equivalent to SLEEP(0).  */
  44
  45 #ifdef HAVE_SLEEP
  46 extern void sleep_i4_sub (GFC_INTEGER_4 *);
  47 iexport_proto(sleep_i4_sub);
  48
  49 void
  50 sleep_i4_sub (GFC_INTEGER_4 *seconds)
  51 {
  52   sleep (*seconds < 0 ? 0 : (unsigned int) *seconds);
  53 }
  54 iexport(sleep_i4_sub);
  55
  56 extern void sleep_i8_sub (GFC_INTEGER_8 *);
  57 iexport_proto(sleep_i8_sub);
  58
  59 void
  60 sleep_i8_sub (GFC_INTEGER_8 *seconds)
  61 {
  62   sleep (*seconds < 0 ? 0 : (unsigned int) *seconds);
  63 }
  64 iexport(sleep_i8_sub);
  65 #endif