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NetCAssign needs to incr_eref its lval to lock it down.

This commit is contained in:
steve 2000-05-12 01:22:41 +00:00
parent 367db72c99
commit c3282bfa6c
1 changed files with 20 additions and 1 deletions
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21
net_force.cc
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@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/ */
#if !defined(WINNT) && !defined(macintosh) #if !defined(WINNT) && !defined(macintosh)
#ident "$Id: net_force.cc,v 1.1 2000/05/11 23:37:27 steve Exp $" #ident "$Id: net_force.cc,v 1.2 2000/05/12 01:22:41 steve Exp $"
#endif #endif
/* /*
@ -30,9 +30,22 @@
# include "netlist.h" # include "netlist.h"
# include <assert.h> # include <assert.h>
/*
* Construct the procedural continuous assignment statement. This is a
* bit different from a normal assignment because the the lval is only
* intermittantly connected. The deassign in particular disconnects
* the signals when they are not being assigned anymore. Because of
* this, there is no other reference to the lval to make it stay put
* so we increment the eref.
*
* XXXX I'm not sure this is the right way. Perhaps I should create
* output pins to connect to the netlist? But that would cause the
* link ring to grow, and that is not quite correct either. Hmm...
*/
NetCAssign::NetCAssign(const string&n, NetNet*l) NetCAssign::NetCAssign(const string&n, NetNet*l)
: NetNode(n, l->pin_count()), lval_(l) : NetNode(n, l->pin_count()), lval_(l)
{ {
lval_->incr_eref();
for (unsigned idx = 0 ; idx < pin_count() ; idx += 1) { for (unsigned idx = 0 ; idx < pin_count() ; idx += 1) {
pin(idx).set_dir(Link::INPUT); pin(idx).set_dir(Link::INPUT);
pin(idx).set_name("I", idx); pin(idx).set_name("I", idx);
@ -41,6 +54,7 @@ NetCAssign::NetCAssign(const string&n, NetNet*l)
NetCAssign::~NetCAssign() NetCAssign::~NetCAssign()
{ {
lval_->decr_eref();
} }
const Link& NetCAssign::lval_pin(unsigned idx) const const Link& NetCAssign::lval_pin(unsigned idx) const
@ -52,10 +66,12 @@ const Link& NetCAssign::lval_pin(unsigned idx) const
NetDeassign::NetDeassign(NetNet*l) NetDeassign::NetDeassign(NetNet*l)
: lval_(l) : lval_(l)
{ {
lval_->incr_eref();
} }
NetDeassign::~NetDeassign() NetDeassign::~NetDeassign()
{ {
lval_->decr_eref();
} }
const NetNet*NetDeassign::lval() const const NetNet*NetDeassign::lval() const
@ -99,6 +115,9 @@ const NetNet*NetRelease::lval() const
/* /*
* $Log: net_force.cc,v $ * $Log: net_force.cc,v $
* Revision 1.2 2000/05/12 01:22:41 steve
* NetCAssign needs to incr_eref its lval to lock it down.
*
* Revision 1.1 2000/05/11 23:37:27 steve * Revision 1.1 2000/05/11 23:37:27 steve
* Add support for procedural continuous assignment. * Add support for procedural continuous assignment.
* *