libgfortran/intrinsics/sleep.c

   1 /* Implementation of the SLEEP intrinsic.
   2    Copyright (C) 2005 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 2 of the License, or (at your option) any later version.
  11
  12 In addition to the permissions in the GNU General Public License, the
  13 Free Software Foundation gives you unlimited permission to link the
  14 compiled version of this file into combinations with other programs,
  15 and to distribute those combinations without any restriction coming
  16 from the use of this file.  (The General Public License restrictions
  17 do apply in other respects; for example, they cover modification of
  18 the file, and distribution when not linked into a combine
  19 executable.)
  20
  21 Libgfortran is distributed in the hope that it will be useful,
  22 but WITHOUT ANY WARRANTY; without even the implied warranty of
  23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24 GNU General Public License for more details.
  25
  26 You should have received a copy of the GNU General Public
  27 License along with libgfortran; see the file COPYING.  If not,
  28 write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  29 Boston, MA 02110-1301, USA.  */
  30
  31 #include "config.h"
  32 #include "libgfortran.h"
  33
  34 #include <errno.h>
  35
  36 #ifdef HAVE_UNISTD_H
  37 #include <unistd.h>
  38 #endif
  39
  40 #ifdef __MINGW32__
  41 # include <windows.h>
  42 # undef sleep
  43 # define sleep(x) Sleep(1000*(x))
  44 # define HAVE_SLEEP 1
  45 #endif
  46
  47 /* SUBROUTINE SLEEP(SECONDS)
  48    INTEGER, INTENT(IN) :: SECONDS
  49
  50    A choice had to be made if SECONDS is negative. For g77, this is
  51    equivalent to SLEEP(0).  */
  52
  53 #ifdef HAVE_SLEEP
  54 extern void sleep_i4_sub (GFC_INTEGER_4 *);
  55 iexport_proto(sleep_i4_sub);
  56
  57 void
  58 sleep_i4_sub (GFC_INTEGER_4 *seconds)
  59 {
  60   sleep (*seconds < 0 ? 0 : (unsigned int) *seconds);
  61 }
  62 iexport(sleep_i4_sub);
  63
  64 extern void sleep_i8_sub (GFC_INTEGER_8 *);
  65 iexport_proto(sleep_i8_sub);
  66
  67 void
  68 sleep_i8_sub (GFC_INTEGER_8 *seconds)
  69 {
  70   sleep (*seconds < 0 ? 0 : (unsigned int) *seconds);
  71 }
  72 iexport(sleep_i8_sub);
  73 #endif