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/*
* Copyright (c) 2000 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: net_event.cc,v 1.6 2000/04/18 04:50:20 steve Exp $"
#endif
# include "netlist.h"
NetEvent::NetEvent(const string&n)
: name_(n)
{
scope_ = 0;
snext_ = 0;
probes_ = 0;
trig_ = 0;
waitref_ = 0;
}
NetEvent::~NetEvent()
{
assert(waitref_ == 0);
if (scope_) scope_->rem_event(this);
while (probes_) {
NetEvProbe*tmp = probes_->enext_;
delete probes_;
tmp = probes_;
}
}
string NetEvent::name() const
{
return name_;
}
string NetEvent::full_name() const
{
assert(scope_);
return scope_->name() + "." + name_;
}
unsigned NetEvent::nprobe() const
{
unsigned cnt = 0;
NetEvProbe*cur = probes_;
while (cur) {
cnt += 1;
cur = cur->enext_;
}
return cnt;
}
NetEvProbe* NetEvent::probe(unsigned idx)
{
NetEvProbe*cur = probes_;
while (cur && idx) {
cur = cur->enext_;
idx -= 1;
}
return cur;
}
unsigned NetEvent::ntrig() const
{
unsigned cnt = 0;
NetEvTrig*cur = trig_;
while (cur) {
cnt += 1;
cur = cur->enext_;
}
return cnt;
}
unsigned NetEvent::nwait() const
{
return waitref_;
}
NetEvTrig::NetEvTrig(NetEvent*ev)
: event_(ev)
{
enext_ = event_->trig_;
event_->trig_ = this;
}
NetEvTrig::~NetEvTrig()
{
if (event_->trig_ == this) {
event_->trig_ = enext_;
} else {
NetEvTrig*cur = event_->trig_;
while (cur->enext_ != this) {
assert(cur->enext_);
cur = cur->enext_;
}
cur->enext_ = this->enext_;
}
}
const NetEvent* NetEvTrig::event() const
{
return event_;
}
NetEvProbe::NetEvProbe(const string&n, NetEvent*tgt,
edge_t t, unsigned p)
: NetNode(n, p), event_(tgt), edge_(t)
{
for (unsigned idx = 0 ; idx < p ; idx += 1) {
pin(idx).set_dir(Link::INPUT);
pin(idx).set_name("P", idx);
}
enext_ = event_->probes_;
event_->probes_ = this;
}
NetEvProbe::~NetEvProbe()
{
if (event_->probes_ == this) {
event_->probes_ = enext_;
} else {
NetEvProbe*cur = event_->probes_;
while (cur->enext_ != this) {
assert(cur->enext_);
cur = cur->enext_;
}
cur->enext_ = this->enext_;
}
}
NetEvProbe::edge_t NetEvProbe::edge() const
{
return edge_;
}
const NetEvent* NetEvProbe::event() const
{
return event_;
}
NetEvWait::NetEvWait(NetProc*pr)
: statement_(pr), nevents_(0), events_(0)
{
}
NetEvWait::~NetEvWait()
{
if (events_) {
for (unsigned idx = 0 ; idx < nevents_ ; idx += 1) {
NetEvent*tgt = events_[idx];
tgt->waitref_ -= 1;
}
delete[]events_;
}
delete statement_;
}
void NetEvWait::add_event(NetEvent*tgt)
{
assert(tgt);
if (nevents_ == 0) {
events_ = new NetEvent*[1];
} else {
NetEvent**tmp = new NetEvent*[nevents_+1];
for (unsigned idx = 0 ; idx < nevents_ ; idx += 1) {
tmp[idx] = events_[idx];
assert(tmp[idx] != tgt);
}
delete[]events_;
events_ = tmp;
}
events_[nevents_] = tgt;
nevents_ += 1;
// Remember to tell the NetEvent that there is someone
// pointing to it.
tgt->waitref_ += 1;
}
unsigned NetEvWait::nevents() const
{
return nevents_;
}
const NetEvent* NetEvWait::event(unsigned idx) const
{
assert(idx < nevents_);
return events_[idx];
}
NetEvent* NetEvWait::event(unsigned idx)
{
assert(idx < nevents_);
return events_[idx];
}
NetProc* NetEvWait::statement()
{
return statement_;
}
/*
* $Log: net_event.cc,v $
* Revision 1.6 2000/04/18 04:50:20 steve
* Clean up unneeded NetEvent objects.
*
* Revision 1.5 2000/04/16 23:32:18 steve
* Synthesis of comparator in expressions.
*
* Connect the NetEvent and related classes
* together better.
*
* Revision 1.4 2000/04/12 20:02:53 steve
* Finally remove the NetNEvent and NetPEvent classes,
* Get synthesis working with the NetEvWait class,
* and get started supporting multiple events in a
* wait in vvm.
*
* Revision 1.3 2000/04/12 04:23:58 steve
* Named events really should be expressed with PEIdent
* objects in the pform,
*
* Handle named events within the mix of net events
* and edges. As a unified lot they get caught together.
* wait statements are broken into more complex statements
* that include a conditional.
*
* Do not generate NetPEvent or NetNEvent objects in
* elaboration. NetEvent, NetEvWait and NetEvProbe
* take over those functions in the netlist.
*
* Revision 1.2 2000/04/10 05:26:06 steve
* All events now use the NetEvent class.
*
* Revision 1.1 2000/04/04 03:20:15 steve
* Simulate named event trigger and waits.
*
*/
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