libchill/checkcycle.c

   1 /* Implement timing-related runtime actions for CHILL.
   2    Copyright (C) 1992,1993 Free Software Foundation, Inc.
   3    Author: Wilfried Moser
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC 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 2, or (at your option)
  10 any later version.
  11
  12 GNU CC 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 GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 /* As a special exception, if you link this library with other files,
  22    some of which are compiled with GCC, to produce an executable,
  23    this library does not by itself cause the resulting executable
  24    to be covered by the GNU General Public License.
  25    This exception does not however invalidate any other reasons why
  26    the executable file might be covered by the GNU General Public License.  */
  27
  28 #include "rtltypes.h"
  29 #include "rts.h"
  30
  31 EXCEPTION (cyclefail);
  32
  33 /*
  34  * function __check_cycle
  35  *
  36  * parameters:
  37  *      t         pointer to initial time
  38  *      dur       duration
  39  *      filename  filename of call
  40  *      lineno    linenumber of call
  41  *
  42  * returns:
  43  *      void
  44  *
  45  * exceptions:
  46  *      cyclefail
  47  *
  48  * abstract:
  49  *      Function checks if cycle is possible (there is time left) and wait the
  50  *      remaining time.
  51  *
  52  */
  53
  54 extern int __remaintime (RtsTime *since, unsigned long dur, RtsTime *remain);
  55 extern int __cause_ex1 (char *ex, char *file, int lineno);
  56
  57 void
  58 __check_cycle (t, dur, fname, lineno)
  59     RtsTime       *t;
  60     unsigned long  dur;
  61     char          *fname;
  62     int            lineno;
  63 {
  64   RtsTime remain;
  65
  66   if (__remaintime (t, dur, &remain) != 0)
  67     /* no time left -- cause exception */
  68     __cause_ex1 ("cyclefail", fname, lineno);
  69
  70   /* delay the process */
  71   __delay_this (wait_wait, &remain, fname, lineno);
  72 }