PDelays.h

   1 #ifndef __PDelays_H
   2 #define __PDelays_H
   3 /*
   4  * Copyright (c) 1999-2002 Stephen Williams (steve@icarus.com)
   5  *
   6  *    This source code is free software; you can redistribute it
   7  *    and/or modify it in source code form under the terms of the GNU
   8  *    General Public License as published by the Free Software
   9  *    Foundation; either version 2 of the License, or (at your option)
  10  *    any later version.
  11  *
  12  *    This program 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 this program; if not, write to the Free Software
  19  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  20  */
  21 #ifdef HAVE_CVS_IDENT
  22 #ident "$Id: PDelays.h,v 1.9 2006/01/03 05:22:14 steve Exp $"
  23 #endif
  24
  25 # include  "svector.h"
  26 # include  <string>
  27 # include  <iostream>
  28
  29 #ifdef __GNUC__
  30 #if __GNUC__ > 2
  31 using namespace std;
  32 #endif
  33 #endif
  34
  35 class Design;
  36 class NetScope;
  37 class NetExpr;
  38 class PExpr;
  39
  40 /*
  41  * Various PForm objects can carry delays. These delays include rise,
  42  * fall and decay times. This class arranges to carry the triplet.
  43  */
  44 class PDelays {
  45
  46     public:
  47       PDelays();
  48       ~PDelays();
  49
  50         /* Set the delay expressions. If the delete_flag is true, then
  51            this object takes ownership of the expressions, and will
  52            delete it in the destructor. */
  53       void set_delay(PExpr*);
  54       void set_delays(const svector<PExpr*>*del, bool delete_flag=true);
  55
  56       void eval_delays(Design*des, NetScope*scope,
  57                        NetExpr*&rise_time,
  58                        NetExpr*&fall_time,
  59                        NetExpr*&decay_time,
  60                        bool as_nets_flag =false) const;
  61
  62       void dump_delays(ostream&out) const;
  63
  64     private:
  65       PExpr* delay_[3];
  66       bool delete_flag_;
  67
  68     private: // not implemented
  69       PDelays(const PDelays&);
  70       PDelays& operator= (const PDelays&);
  71 };
  72
  73 ostream& operator << (ostream&o, const PDelays&);
  74
  75 /*
  76  * $Log: PDelays.h,v $
  77  * Revision 1.9  2006/01/03 05:22:14  steve
  78  *  Handle complex net node delays.
  79  *
  80  * Revision 1.8  2006/01/02 05:33:19  steve
  81  *  Node delays can be more general expressions in structural contexts.
  82  *
  83  * Revision 1.7  2002/08/12 01:34:58  steve
  84  *  conditional ident string using autoconfig.
  85  *
  86  * Revision 1.6  2002/06/14 03:25:51  steve
  87  *  Compiler portability.
  88  *
  89  * Revision 1.5  2001/12/29 20:19:31  steve
  90  *  Do not delete delay expressions of UDP instances.
  91  *
  92  * Revision 1.4  2001/11/22 06:20:59  steve
  93  *  Use NetScope instead of string for scope path.
  94  *
  95  * Revision 1.3  2001/01/16 02:44:17  steve
  96  *  Use the iosfwd header if available.
  97  *
  98  * Revision 1.2  2000/02/23 02:56:53  steve
  99  *  Macintosh compilers do not support ident.
 100  *
 101  * Revision 1.1  1999/09/04 19:11:46  steve
 102  *  Add support for delayed non-blocking assignments.
 103  *
 104  */
 105 #endif