ext: Include SystemC 2.3.1 into gem5

In the past it happened several times that some changes in gem5 broke the
SystemC coupling. Recently Accelera has changed the licence for SystemC
from their own licence to Apache2.0, which is compatible with gem5.
However, SystemC usually relies on the Boost library, but I was able to
exchange the boost calls by c++11 alternatives. The recent SystemC version
is placed into /ext and is integrated into gem5's build system. The goal is
to integrate some SystemC tests for the CI in some following patches.

Change-Id: I4b66ec806b5e3cffc1d7c85d3735ff4fa5b31fd0
Reviewed-on: https://gem5-review.googlesource.com/2240
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>

1 files changed, 759 insertions, 0 deletions

diff --git a/ext/systemc/src/sysc/kernel/sc_event.cpp b/ext/systemc/src/sysc/kernel/sc_event.cpp
new file mode 100644
index 000000000..488210ee9
--- /dev/null
+++ b/ext/systemc/src/sysc/kernel/sc_event.cpp
@@ -0,0 +1,759 @@
+/*****************************************************************************
+
+  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.
+
+ *****************************************************************************/
+
+/*****************************************************************************
+
+  sc_event.cpp --
+
+  Original Author: Martin Janssen, Synopsys, Inc., 2001-05-21
+
+ CHANGE LOG APPEARS AT THE END OF THE FILE
+ *****************************************************************************/
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "sysc/kernel/sc_event.h"
+#include "sysc/kernel/sc_kernel_ids.h"
+#include "sysc/kernel/sc_phase_callback_registry.h"
+#include "sysc/kernel/sc_process.h"
+#include "sysc/kernel/sc_process_handle.h"
+#include "sysc/kernel/sc_simcontext_int.h"
+#include "sysc/kernel/sc_object_manager.h"
+#include "sysc/utils/sc_utils_ids.h"
+
+namespace sc_core {
+
+// ----------------------------------------------------------------------------
+//  CLASS : sc_event
+//
+//  The event class.
+// ----------------------------------------------------------------------------
+
+const char*
+sc_event::basename() const
+{
+    const char* p = strrchr( m_name.c_str(), SC_HIERARCHY_CHAR );
+    return p ? (p + 1) : m_name.c_str();
+}
+
+void
+sc_event::cancel()
+{
+    // cancel a delta or timed notification
+    switch( m_notify_type ) {
+    case DELTA: {
+        // remove this event from the delta events set
+        m_simc->remove_delta_event( this );
+        m_notify_type = NONE;
+        break;
+    }
+    case TIMED: {
+        // remove this event from the timed events set
+        sc_assert( m_timed != 0 );
+        m_timed->m_event = 0;
+        m_timed = 0;
+        m_notify_type = NONE;
+        break;
+    }
+    default:
+        ;
+    }
+}
+
+
+void
+sc_event::notify()
+{
+    // immediate notification
+    if(
+        // coming from sc_prim_channel::update
+        m_simc->update_phase()
+#if SC_HAS_PHASE_CALLBACKS_
+        // coming from phase callbacks
+        || m_simc->notify_phase()
+#endif
+      )
+    {
+        SC_REPORT_ERROR( SC_ID_IMMEDIATE_NOTIFICATION_, "" );
+        return;
+    }
+    cancel();
+    trigger();
+}
+
+void
+sc_event::notify( const sc_time& t )
+{
+    if( m_notify_type == DELTA ) {
+        return;
+    }
+    if( t == SC_ZERO_TIME ) {
+#       if SC_HAS_PHASE_CALLBACKS_
+            if( SC_UNLIKELY_( m_simc->get_status()
+                              & (SC_END_OF_UPDATE|SC_BEFORE_TIMESTEP) ) )
+            {
+                std::stringstream msg;
+                msg << m_simc->get_status()
+                    << ":\n\t delta notification of `"
+                    << name() << "' ignored";
+                SC_REPORT_WARNING( SC_ID_PHASE_CALLBACK_FORBIDDEN_
+                                 , msg.str().c_str() );
+                return;
+            }
+#       endif
+        if( m_notify_type == TIMED ) {
+            // remove this event from the timed events set
+            sc_assert( m_timed != 0 );
+            m_timed->m_event = 0;
+            m_timed = 0;
+        }
+        // add this event to the delta events set
+        m_delta_event_index = m_simc->add_delta_event( this );
+        m_notify_type = DELTA;
+        return;
+    }
+#   if SC_HAS_PHASE_CALLBACKS_
+        if( SC_UNLIKELY_( m_simc->get_status()
+                        & (SC_END_OF_UPDATE|SC_BEFORE_TIMESTEP) ) )
+        {
+            std::stringstream msg;
+            msg << m_simc->get_status()
+                << ":\n\t timed notification of `"
+                << name() << "' ignored";
+            SC_REPORT_WARNING( SC_ID_PHASE_CALLBACK_FORBIDDEN_
+                             , msg.str().c_str() );
+            return;
+        }
+#   endif
+    if( m_notify_type == TIMED ) {
+        sc_assert( m_timed != 0 );
+        if( m_timed->m_notify_time <= m_simc->time_stamp() + t ) {
+            return;
+        }
+        // remove this event from the timed events set
+        m_timed->m_event = 0;
+        m_timed = 0;
+    }
+    // add this event to the timed events set
+    sc_event_timed* et = new sc_event_timed( this, m_simc->time_stamp() + t );
+    m_simc->add_timed_event( et );
+    m_timed = et;
+    m_notify_type = TIMED;
+}
+
+static void sc_warn_notify_delayed()
+{
+    static bool warn_notify_delayed=true;
+    if ( warn_notify_delayed )
+    {
+        warn_notify_delayed = false;
+        SC_REPORT_INFO(SC_ID_IEEE_1666_DEPRECATION_,
+      "notify_delayed(...) is deprecated, use notify(sc_time) instead" );
+    }
+}
+
+void
+sc_event::notify_delayed()
+{
+    sc_warn_notify_delayed();
+    if( m_notify_type != NONE ) {
+        SC_REPORT_ERROR( SC_ID_NOTIFY_DELAYED_, 0 );
+    }
+    // add this event to the delta events set
+    m_delta_event_index = m_simc->add_delta_event( this );
+    m_notify_type = DELTA;
+}
+
+void
+sc_event::notify_delayed( const sc_time& t )
+{
+    sc_warn_notify_delayed();
+    if( m_notify_type != NONE ) {
+        SC_REPORT_ERROR( SC_ID_NOTIFY_DELAYED_, 0 );
+    }
+    if( t == SC_ZERO_TIME ) {
+        // add this event to the delta events set
+        m_delta_event_index = m_simc->add_delta_event( this );
+        m_notify_type = DELTA;
+    } else {
+        // add this event to the timed events set
+        sc_event_timed* et = new sc_event_timed( this,
+                                                 m_simc->time_stamp() + t );
+        m_simc->add_timed_event( et );
+        m_timed = et;
+        m_notify_type = TIMED;
+    }
+}
+
+// +----------------------------------------------------------------------------
+// |"sc_event::register_event"
+// | 
+// | This method sets the name of this object instance and optionally adds 
+// | it to the object manager's hierarchy. The object instance will be
+// | inserted into the object manager's hierarchy if one of the following is
+// | true:
+// |   (a) the leaf name is non-null and does not start with  
+// |       SC_KERNEL_EVENT_PREFIX.
+// |   (b) the event is being created before the start of simulation.
+// |
+// | Arguments:
+// |     leaf_name = leaf name of the object or NULL.
+// +----------------------------------------------------------------------------
+void sc_event::register_event( const char* leaf_name )
+{
+    sc_object_manager* object_manager = m_simc->get_object_manager();
+    m_parent_p = m_simc->active_object();
+
+    // No name provided, if we are not executing then create a name:
+
+    if( !leaf_name || !leaf_name[0] )
+    {
+	if ( sc_is_running( m_simc ) ) return;
+        leaf_name = sc_gen_unique_name("event");    
+    }
+
+    // Create a hierarchichal name and place it into the object manager if
+    // its not a kernel event:
+
+    object_manager->create_name( leaf_name ).swap( m_name );
+
+    if ( strncmp( leaf_name, SC_KERNEL_EVENT_PREFIX, 
+                  strlen(SC_KERNEL_EVENT_PREFIX) ) )
+    {
+	object_manager->insert_event(m_name, this);
+	if ( m_parent_p )
+	    m_parent_p->add_child_event( this );
+	else
+	    m_simc->add_child_event( this );
+    }
+}
+
+void
+sc_event::reset()
+{
+    m_notify_type = NONE;
+    m_delta_event_index = -1;
+    m_timed = 0;
+    // clear the dynamic sensitive methods
+    m_methods_dynamic.resize(0);
+    // clear the dynamic sensitive threads
+    m_threads_dynamic.resize(0);
+}
+
+// +----------------------------------------------------------------------------
+// |"sc_event::sc_event(name)"
+// | 
+// | This is the object instance constructor for named sc_event instances.
+// | If the name is non-null or the this is during elaboration add the
+// | event to the object hierarchy.
+// |
+// | Arguments:
+// |     name = name of the event.
+// +----------------------------------------------------------------------------
+sc_event::sc_event( const char* name ) :
+    m_name(),
+    m_parent_p(NULL),
+    m_simc( sc_get_curr_simcontext() ),
+    m_notify_type( NONE ),
+    m_delta_event_index( -1 ),
+    m_timed( 0 ),
+    m_methods_static(),
+    m_methods_dynamic(),
+    m_threads_static(),
+    m_threads_dynamic()
+{
+    // Skip simulator's internally defined events.
+
+    register_event( name );
+}
+
+// +----------------------------------------------------------------------------
+// |"sc_event::sc_event(name)"
+// | 
+// | This is the object instance constructor for non-named sc_event instances.
+// | If this is during elaboration add create a name and add it to the object
+// | hierarchy.
+// +----------------------------------------------------------------------------
+sc_event::sc_event() :
+    m_name(),
+    m_parent_p(NULL),
+    m_simc( sc_get_curr_simcontext() ),
+    m_notify_type( NONE ),
+    m_delta_event_index( -1 ),
+    m_timed( 0 ),
+    m_methods_static(),
+    m_methods_dynamic(),
+    m_threads_static(),
+    m_threads_dynamic()
+{
+
+    register_event( NULL );
+}
+
+// +----------------------------------------------------------------------------
+// |"sc_event::~sc_event"
+// | 
+// | This is the object instance destructor for this class. It cancels any
+// | outstanding waits and removes the event from the object manager's 
+// | instance table if it has a name.
+// +----------------------------------------------------------------------------
+sc_event::~sc_event()
+{
+    cancel();
+    if ( m_name.length() != 0 )
+    {
+	sc_object_manager* object_manager_p = m_simc->get_object_manager();
+	object_manager_p->remove_event( m_name );
+    }
+}
+
+// +----------------------------------------------------------------------------
+// |"sc_event::trigger"
+// | 
+// | This method "triggers" this object instance. This consists of scheduling
+// | for execution all the processes that are schedulable and waiting on this 
+// | event.
+// +----------------------------------------------------------------------------
+void
+sc_event::trigger()
+{
+    int       last_i; // index of last element in vector now accessing.
+    int       size;   // size of vector now accessing.
+
+
+    // trigger the static sensitive methods
+
+    if( ( size = m_methods_static.size() ) != 0 ) 
+    {
+        sc_method_handle* l_methods_static = &m_methods_static[0];
+        int i = size - 1;
+        do {
+            sc_method_handle method_h = l_methods_static[i];
+            method_h->trigger_static();
+        } while( -- i >= 0 );
+    }
+
+    // trigger the dynamic sensitive methods
+
+
+    if( ( size = m_methods_dynamic.size() ) != 0 ) 
+    {
+	last_i = size - 1;
+	sc_method_handle* l_methods_dynamic = &m_methods_dynamic[0];
+	for ( int i = 0; i <= last_i; i++ )
+	{
+	    sc_method_handle method_h = l_methods_dynamic[i];
+	    if ( method_h->trigger_dynamic( this ) )
+	    {
+		l_methods_dynamic[i] = l_methods_dynamic[last_i];
+		last_i--;
+		i--;
+	    }
+	}
+        m_methods_dynamic.resize(last_i+1);
+    }
+
+
+    // trigger the static sensitive threads
+
+    if( ( size = m_threads_static.size() ) != 0 ) 
+    {
+        sc_thread_handle* l_threads_static = &m_threads_static[0];
+        int i = size - 1;
+        do {
+            sc_thread_handle thread_h = l_threads_static[i];
+            thread_h->trigger_static();
+        } while( -- i >= 0 );
+    }
+
+    // trigger the dynamic sensitive threads
+
+    if( ( size = m_threads_dynamic.size() ) != 0 ) 
+    {
+	last_i = size - 1;
+	sc_thread_handle* l_threads_dynamic = &m_threads_dynamic[0];
+	for ( int i = 0; i <= last_i; i++ )
+	{
+	    sc_thread_handle thread_h = l_threads_dynamic[i];
+	    if ( thread_h->trigger_dynamic( this ) )
+	    {
+		l_threads_dynamic[i] = l_threads_dynamic[last_i];
+		i--;
+		last_i--;
+	    }
+	}
+        m_threads_dynamic.resize(last_i+1);
+    }
+
+    m_notify_type = NONE;
+    m_delta_event_index = -1;
+    m_timed = 0;
+}
+
+
+bool
+sc_event::remove_static( sc_method_handle method_h_ ) const
+{
+    int size;
+    if ( ( size = m_methods_static.size() ) != 0 ) {
+      sc_method_handle* l_methods_static = &m_methods_static[0];
+      for( int i = size - 1; i >= 0; -- i ) {
+          if( l_methods_static[i] == method_h_ ) {
+              l_methods_static[i] = l_methods_static[size - 1];
+              m_methods_static.resize(size-1);
+              return true;
+          }
+      }
+    }
+    return false;
+}
+
+bool
+sc_event::remove_static( sc_thread_handle thread_h_ ) const
+{
+    int size;
+    if ( ( size = m_threads_static.size() ) != 0 ) {
+      sc_thread_handle* l_threads_static = &m_threads_static[0];
+      for( int i = size - 1; i >= 0; -- i ) {
+          if( l_threads_static[i] == thread_h_ ) {
+              l_threads_static[i] = l_threads_static[size - 1];
+              m_threads_static.resize(size-1);
+              return true;
+          }
+      }
+    }
+    return false;
+}
+
+bool
+sc_event::remove_dynamic( sc_method_handle method_h_ ) const
+{
+    int size;
+    if ( ( size = m_methods_dynamic.size() ) != 0 ) {
+      sc_method_handle* l_methods_dynamic = &m_methods_dynamic[0];
+      for( int i = size - 1; i >= 0; -- i ) {
+          if( l_methods_dynamic[i] == method_h_ ) {
+              l_methods_dynamic[i] = l_methods_dynamic[size - 1];
+              m_methods_dynamic.resize(size-1);
+              return true;
+          }
+      }
+    }
+    return false;
+}
+
+bool
+sc_event::remove_dynamic( sc_thread_handle thread_h_ ) const
+{
+    int size;
+    if ( ( size= m_threads_dynamic.size() ) != 0 ) {
+      sc_thread_handle* l_threads_dynamic = &m_threads_dynamic[0];
+      for( int i = size - 1; i >= 0; -- i ) {
+          if( l_threads_dynamic[i] == thread_h_ ) {
+              l_threads_dynamic[i] = l_threads_dynamic[size - 1];
+              m_threads_dynamic.resize(size-1);
+              return true;
+          }
+      }
+    }
+    return false;
+}
+
+
+// ----------------------------------------------------------------------------
+//  CLASS : sc_event_timed
+//
+//  Class for storing the time to notify a timed event.
+// ----------------------------------------------------------------------------
+
+// dedicated memory management; not MT-Safe
+
+union sc_event_timed_u
+{
+    sc_event_timed_u* next;
+    char              dummy[sizeof( sc_event_timed )];
+};
+
+static
+sc_event_timed_u* free_list = 0;
+
+void*
+sc_event_timed::allocate()
+{
+    const int ALLOC_SIZE = 64;
+
+    if( free_list == 0 ) {
+        free_list = (sc_event_timed_u*) malloc( ALLOC_SIZE *
+                                                sizeof( sc_event_timed ) );
+        int i = 0;
+        for( ; i < ALLOC_SIZE - 1; ++ i ) {
+            free_list[i].next = &free_list[i + 1];
+        }
+        free_list[i].next = 0;
+    }
+
+    sc_event_timed_u* q = free_list;
+    free_list = free_list->next;
+    return q;
+}
+
+void
+sc_event_timed::deallocate( void* p )
+{
+    if( p != 0 ) {
+        sc_event_timed_u* q = RCAST<sc_event_timed_u*>( p );
+        q->next = free_list;
+        free_list = q;
+    }
+}
+
+
+// ----------------------------------------------------------------------------
+//  CLASS : sc_event_list
+//
+//  Base class for lists of events.
+// ----------------------------------------------------------------------------
+
+void
+sc_event_list::push_back( const sc_event& e )
+{
+    // make sure e is not already in the list
+    if ( m_events.size() != 0 ) {
+      const sc_event** l_events = &m_events[0];
+      for( int i = m_events.size() - 1; i >= 0; -- i ) {
+          if( &e == l_events[i] ) {
+              // event already in the list; ignore
+              return;
+          }
+      }
+    }
+    m_events.push_back( &e );
+}
+
+void 
+sc_event_list::push_back( const sc_event_list& el )
+{
+    m_events.reserve( size() + el.size() );
+    for ( int i = el.m_events.size() - 1; i >= 0; --i )
+    {
+        push_back( *el.m_events[i] );
+    }
+    el.auto_delete();
+}
+
+void
+sc_event_list::add_dynamic( sc_method_handle method_h ) const
+{
+    m_busy++;
+    if ( m_events.size() != 0 ) {
+      const sc_event* const * l_events = &m_events[0];
+      for( int i = m_events.size() - 1; i >= 0; -- i ) {
+          l_events[i]->add_dynamic( method_h );
+      }
+  }
+}
+
+void
+sc_event_list::add_dynamic( sc_thread_handle thread_h ) const
+{
+    m_busy++;
+    if ( m_events.size() != 0 ) {
+      const sc_event* const* l_events = &m_events[0];
+      for( int i = m_events.size() - 1; i >= 0; -- i ) {
+          l_events[i]->add_dynamic( thread_h );
+      }
+  }
+}
+
+void
+sc_event_list::remove_dynamic( sc_method_handle method_h,
+                               const sc_event* e_not ) const
+{
+    if ( m_events.size() != 0 ) {
+      const sc_event* const* l_events = &m_events[0];
+      for( int i = m_events.size() - 1; i >= 0; -- i ) {
+          const sc_event* e = l_events[i];
+          if( e != e_not ) {
+              e->remove_dynamic( method_h );
+          }
+      }
+  }
+}
+
+void
+sc_event_list::remove_dynamic( sc_thread_handle thread_h,
+                               const sc_event* e_not ) const
+{
+    if ( m_events.size() != 0 ) {
+      const sc_event* const* l_events = &m_events[0];
+      for( int i = m_events.size() - 1; i >= 0; -- i ) {
+          const sc_event* e = l_events[i];
+          if( e != e_not ) {
+              e->remove_dynamic( thread_h );
+          }
+      }
+  }
+}
+
+void
+sc_event_list::report_premature_destruction() const
+{
+    // TDB: reliably detect premature destruction
+    //
+    // If an event list is used as a member of a module,
+    // its lifetime may (correctly) end, although there
+    // are processes currently waiting for it.
+    //
+    // Detecting (and ignoring) this corner-case is quite
+    // difficult for similar reasons to the sc_is_running()
+    // return value during the destruction of the module
+    // hierarchy.
+    //
+    // Ignoring the lifetime checks for now, if no process
+    // is currently running (which is only part of the story):
+
+    if( sc_get_current_process_handle().valid() ) {
+        // FIXME: improve error-handling
+        sc_assert( false && "sc_event_list prematurely destroyed" );
+    }
+
+}
+
+void
+sc_event_list::report_invalid_modification() const
+{
+    // FIXME: improve error-handling
+    sc_assert( false && "sc_event_list modfied while being waited on" );
+}
+
+// ----------------------------------------------------------------------------
+//  Deprecated functional notation for notifying events.
+// ----------------------------------------------------------------------------
+
+static void sc_warn_notify()
+{
+    static bool warn_notify=true;
+    if ( warn_notify )
+    {
+  SC_REPORT_INFO(SC_ID_IEEE_1666_DEPRECATION_,
+      "the notify() function is deprecated use sc_event::notify()" );
+  warn_notify = false;
+    }
+}
+
+void
+notify( sc_event& e )
+{
+    sc_warn_notify();
+    e.notify();
+}
+
+void
+notify( const sc_time& t, sc_event& e )
+{
+    sc_warn_notify();
+    e.notify( t );
+}
+
+void
+notify( double v, sc_time_unit tu, sc_event& e )
+{
+    sc_warn_notify();
+    e.notify( v, tu );
+}
+
+} // namespace sc_core
+
+// $Log: sc_event.cpp,v $
+// Revision 1.17  2011/08/26 20:46:09  acg
+//  Andy Goodrich: moved the modification log to the end of the file to
+//  eliminate source line number skew when check-ins are done.
+//
+// Revision 1.16  2011/08/24 22:05:50  acg
+//  Torsten Maehne: initialization changes to remove warnings.
+//
+// Revision 1.15  2011/03/12 21:07:51  acg
+//  Andy Goodrich: changes to kernel generated event support.
+//
+// Revision 1.14  2011/03/06 15:55:52  acg
+//  Andy Goodrich: changes for named events.
+//
+// Revision 1.13  2011/03/05 01:39:21  acg
+//  Andy Goodrich: changes for named events.
+//
+// Revision 1.12  2011/02/19 08:33:25  acg
+//  Andy Goodrich: remove }'s that should have been removed before.
+//
+// Revision 1.11  2011/02/19 08:30:53  acg
+//  Andy Goodrich: Moved process queueing into trigger_static from
+//  sc_event::notify.
+//
+// Revision 1.10  2011/02/18 20:27:14  acg
+//  Andy Goodrich: Updated Copyrights.
+//
+// Revision 1.9  2011/02/17 19:49:51  acg
+//  Andy Goodrich:
+//    (1) Changed signature of trigger_dynamic() to return a bool again.
+//    (2) Moved process run queue processing into trigger_dynamic().
+//
+// Revision 1.8  2011/02/16 22:37:30  acg
+//  Andy Goodrich: clean up to remove need for ps_disable_pending.
+//
+// Revision 1.7  2011/02/13 21:47:37  acg
+//  Andy Goodrich: update copyright notice.
+//
+// Revision 1.6  2011/02/01 21:02:28  acg
+//  Andy Goodrich: new return code for trigger_dynamic() calls.
+//
+// Revision 1.5  2011/01/18 20:10:44  acg
+//  Andy Goodrich: changes for IEEE1666_2011 semantics.
+//
+// Revision 1.4  2011/01/06 18:04:05  acg
+//  Andy Goodrich: added code to leave disabled processes on the dynamic
+//  method and thread queues.
+//
+// Revision 1.3  2008/05/22 17:06:25  acg
+//  Andy Goodrich: updated copyright notice to include 2008.
+//
+// Revision 1.2  2007/01/17 22:44:30  acg
+//  Andy Goodrich: fix for Microsoft compiler.
+//
+// Revision 1.7  2006/04/11 23:13:20  acg
+//   Andy Goodrich: Changes for reduced reset support that only includes
+//   sc_cthread, but has preliminary hooks for expanding to method and thread
+//   processes also.
+//
+// Revision 1.6  2006/01/25 00:31:19  acg
+//  Andy Goodrich: Changed over to use a standard message id of
+//  SC_ID_IEEE_1666_DEPRECATION for all deprecation messages.
+//
+// Revision 1.5  2006/01/24 20:59:11  acg
+//  Andy Goodrich: fix up of CVS comments, new version roll.
+//
+// Revision 1.4  2006/01/24 20:48:14  acg
+// Andy Goodrich: added deprecation warnings for notify_delayed(). Added two
+// new implementation-dependent methods, notify_next_delta() & notify_internal()
+// to replace calls to notify_delayed() from within the simulator. These two
+// new methods are simpler than notify_delayed() and should speed up simulations
+//
+// Revision 1.3  2006/01/13 18:44:29  acg
+// Added $Log to record CVS changes into the source.
+
+// Taf!