79 lines
1.8 KiB
C++
79 lines
1.8 KiB
C++
/*
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* Copyright (c) 1998 Stephen Williams (steve@icarus.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#if !defined(WINNT)
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#ident "$Id: vvm_pevent.cc,v 1.2 1999/05/01 02:57:53 steve Exp $"
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#endif
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# include "vvm.h"
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# include "vvm_gates.h"
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vvm_sync::vvm_sync()
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: hold_(0)
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{
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}
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void vvm_sync::wait(vvm_thread*thr)
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{
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assert(hold_ == 0);
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hold_ = thr;
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}
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void vvm_sync::wakeup(vvm_simulation*sim)
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{
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vvm_thread*tmp = hold_;
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hold_ = 0;
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if (tmp) sim->thread_active(tmp);
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}
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vvm_pevent::vvm_pevent(vvm_sync*tgt, EDGE e)
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: target_(tgt), value_(V0), edge_(e)
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{
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}
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void vvm_pevent::set(vvm_simulation*sim, unsigned, vvm_bit_t val)
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{
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if (value_ != val) {
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switch (edge_) {
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case ANYEDGE:
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target_->wakeup(sim);
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break;
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case POSEDGE:
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if (val == V1)
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target_->wakeup(sim);
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break;
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case NEGEDGE:
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if (val == V0)
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target_->wakeup(sim);
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break;
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}
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value_ = val;
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}
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}
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/*
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* $Log: vvm_pevent.cc,v $
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* Revision 1.2 1999/05/01 02:57:53 steve
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* Handle much more complex event expressions.
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*
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* Revision 1.1 1998/11/09 23:44:11 steve
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* Add vvm library.
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*
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*/
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