58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
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/*
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* Copyright (c) 2010 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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# include "vcd_priv.h"
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# include <map>
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/*
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Nexus Id cache
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In structural models, many signals refer to the same nexus.
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Some structural models also have very many signals. This cache
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saves nexus_id - vcd_id pairs, and reuses the vcd_id when a signal
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refers to a nexus that is already dumped.
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The new signal will be listed as a $var, but no callback
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will be installed. This saves considerable CPU time and leads
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to smaller VCD files.
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The _vpiNexusId is a private (int) property of IVL simulators.
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*/
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static std::map<int,const char*> nexus_ident_map;
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extern "C" const char*find_nexus_ident(int nex)
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{
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std::map<int,const char*>::const_iterator cur = nexus_ident_map.find(nex);
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if (cur == nexus_ident_map.end())
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return 0;
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else
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return cur->second;
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}
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extern "C" void set_nexus_ident(int nex, const char*id)
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{
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nexus_ident_map[nex] = id;
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}
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extern "C" void nexus_ident_delete()
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{
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nexus_ident_map.clear();
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}
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