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+/*****************************************************************************
+
+ Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
+ more contributor license agreements. See the NOTICE file distributed
+ with this work for additional information regarding copyright ownership.
+ Accellera licenses this file to you under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with the
+ License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ implied. See the License for the specific language governing
+ permissions and limitations under the License.
+
+ *****************************************************************************/
+
+/*****************************************************************************
+
+ test.cpp --
+
+ Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15
+
+ *****************************************************************************/
+
+/*****************************************************************************
+
+ MODIFICATION LOG - modifiers, enter your name, affiliation, date and
+ changes you are making here.
+
+ Name, Affiliation, Date:
+ Description of Modification:
+
+ *****************************************************************************/
+
+/*
+I believe there is a bug in SystemC 2.0 beta 1 which
+causes simulation to end prematurely in certain cases.
+Specifically, if an event notification occurs at a particular
+time but no processes are ready to run at that time,
+simulation will end. However, there may still be processes
+that need to be run at future times.
+
+Below I've included an example which demonstrates the bug,
+and below that I've provided a proposed fix for the bug.
+
+// This SystemC 2.0 example shows the bug...
+*/
+
+#include <systemc.h>
+
+class top : public sc_module
+{
+ public:
+ SC_HAS_PROCESS(top);
+
+ top(sc_module_name name) : sc_module(name)
+ {
+ SC_THREAD(main);
+ }
+
+ void main()
+ {
+ sc_event e;
+
+ // comment out the following line to see bug go away
+
+ e.notify(55, SC_NS);
+
+ for (int i = 0; i < 10; i++)
+ {
+ wait(10, SC_NS);
+ cout << "main thread at time " << sc_time_stamp() << endl;
+ }
+ }
+};
+
+int sc_main (int argc , char *argv[])
+{
+ top top1("Top1");
+ sc_start();
+ return 0;
+}
+
+/*
+/////// End of example
+
+The proposed fix for this in SystemC 2.0 beta 1 is:
+
+Edit src/sysc/kernel/sc_simcontext.cpp
+
+Lines 801-802, which read:
+
+// no more runnable processes
+break;
+
+Should be changed to read:
+
+// no runnable processes at current time, but maybe in future
+t = next_time();
+continue;
+
+The same changes should be applied at lines 845-846
+Then rebuild and reinstall the SystemC library.
+
+
+___________________________________________________
+Stuart Swan, Senior Architect
+System Level Design Group, Cadence Design Systems
+Building 11
+2670 Seely Avenue
+San Jose, CA 95134
+Phone: +1 408 895 4579
+Email: stuart@cadence.com
+___________________________________________________
+
+*/