Allow rosync events to create new rosync events.
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steve
parent
6593b603ad
commit
e1f712356f
100
vvp/schedule.cc
100
vvp/schedule.cc
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@ -17,7 +17,7 @@
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CVS_IDENT
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#ident "$Id: schedule.cc,v 1.43 2006/09/29 01:24:34 steve Exp $"
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#ident "$Id: schedule.cc,v 1.44 2006/09/29 16:55:04 steve Exp $"
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#endif
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# include "schedule.h"
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@ -205,15 +205,6 @@ inline void event_time_s::operator delete(void*obj, size_t size)
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*/
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static struct event_time_s* sched_list = 0;
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/*
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* At the current time, events that are marked as synch events are put
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* into this list and held off until the time step is about to
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* advance. Then the events in this list are run and the clock is
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* allowed to advance.
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*/
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static struct event_s* synch_list = 0;
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/*
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* This flag is true until a VPI task or function finishes the
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* simulation.
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@ -418,23 +409,6 @@ static void schedule_event_push_(struct event_s*cur)
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}
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/*
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*/
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static struct event_s* pull_sync_event(void)
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{
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if (synch_list == 0)
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return 0;
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struct event_s*cur = synch_list->next;
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if (cur->next == cur) {
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synch_list = 0;
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} else {
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synch_list->next = cur->next;
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}
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return cur;
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}
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void schedule_vthread(vthread_t thr, vvp_time64_t delay, bool push_flag)
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{
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struct vthread_event_s*cur = new vthread_event_s;
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@ -539,6 +513,33 @@ extern void vpiPresim();
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extern void vpiPostsim();
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extern void vpiNextSimTime(void);
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/*
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* The scheduler uses this function to drain the rosync events of the
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* current time. The ctim object is still in the event queue, because
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* it is legal for a rosync callback to create other rosync
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* callbacks. It is *not* legal for them to create any other kinds of
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* events, and that is why the rosync is treated specially.
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*/
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static void run_rosync(struct event_time_s*ctim)
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{
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while (ctim->rosync) {
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struct event_s*cur = ctim->rosync->next;
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if (cur->next == cur) {
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ctim->rosync = 0;
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} else {
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ctim->rosync->next = cur->next;
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}
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cur->run_run();
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delete cur;
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}
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if (ctim->active || ctim->nbassign || ctim->rwsync) {
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fprintf(stderr, "SCHEDULER ERROR: read-only sync events "
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"created RW events!\n");
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}
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}
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void schedule_simulate(void)
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{
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schedule_time = 0;
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@ -563,13 +564,6 @@ void schedule_simulate(void)
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postponed sync events. Run them all. */
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if (ctim->delay > 0) {
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struct event_s*sync_cur;
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while ( (sync_cur = pull_sync_event()) ) {
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sync_cur->run_run();
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delete sync_cur;
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}
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schedule_time += ctim->delay;
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ctim->delay = 0;
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@ -588,9 +582,11 @@ void schedule_simulate(void)
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ctim->active = ctim->rwsync;
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ctim->rwsync = 0;
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/* If out of rw events, then run the rosync
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events and delete this timestep. */
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if (ctim->active == 0) {
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run_rosync(ctim);
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sched_list = ctim->next;
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synch_list = ctim->rosync;
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delete ctim;
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continue;
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}
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@ -612,17 +608,6 @@ void schedule_simulate(void)
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delete (cur);
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}
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/* Clean up lingering ReadOnlySync events. It is safe to do
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that out here because ReadOnlySync events are not allowed
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to create new events. */
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for (struct event_s*sync_cur = pull_sync_event()
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; sync_cur ; sync_cur = pull_sync_event()) {
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sync_cur->run_run();
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delete (sync_cur);
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}
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signals_revert();
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@ -632,6 +617,9 @@ void schedule_simulate(void)
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/*
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* $Log: schedule.cc,v $
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* Revision 1.44 2006/09/29 16:55:04 steve
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* Allow rosync events to create new rosync events.
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*
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* Revision 1.43 2006/09/29 01:24:34 steve
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* rwsync callback fixes from Ben Staveley (with modifications.)
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*
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@ -675,25 +663,5 @@ void schedule_simulate(void)
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*
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* Revision 1.30 2005/01/29 17:53:25 steve
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* Use scheduler to initialize constant functor inputs.
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*
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* Revision 1.29 2004/12/11 02:31:30 steve
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* Rework of internals to carry vectors through nexus instead
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* of single bits. Make the ivl, tgt-vvp and vvp initial changes
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* down this path.
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*
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* Revision 1.28 2004/10/04 01:10:59 steve
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* Clean up spurious trailing white space.
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*
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* Revision 1.27 2003/09/26 02:15:15 steve
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* Slight performance tweaks of scheduler.
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*
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* Revision 1.26 2003/09/09 00:56:45 steve
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* Reimpelement scheduler to divide nonblocking assign queue out.
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*
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* Revision 1.25 2003/04/19 23:32:57 steve
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* Add support for cbNextSimTime.
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*
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* Revision 1.24 2003/02/22 02:52:06 steve
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* Check for stopped flag in certain strategic points.
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*/
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