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- Changed asynch queue insertion and removal to use a lock free algorithm based only on InterlockedCompareExchangePointer. We can now use this lock free approach on IA64 host systems as well.

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- Removed flawed logic which assumed that sim_interval was meaningful when referenced by an asynchronous thread.
- Adjust the event_time of events removed from the asynch queue to account for the average time spent on the queue before the event was noticed by the instruction execution thread.
- Added a sim_activate_notbefore function which specifies an rtime which is the earliest time the event should fire.
- Changed the 'wakeup from idle' logic to force an immediate asynch queue check if the wakeup was not due to a timeout (i.e. it was due to an asynch queue insertion).
- Fixed the descrip.mms to build asynchronous support on AXP and IA64 VMS with kernel threads enabled
This commit is contained in:
Mark Pizzolato
2012-04-04 11:05:24 -07:00
parent 7ac3557524
commit ab3af3062d
8 changed files with 149 additions and 89 deletions
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scp.h
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@@ -83,6 +83,7 @@ t_stat echo_cmd (int32 flag, char *ptr);
t_stat sim_process_event (void);
t_stat sim_activate (UNIT *uptr, int32 interval);
t_stat sim_activate_abs (UNIT *uptr, int32 interval);
t_stat sim_activate_notbefore (UNIT *uptr, int32 rtime);
t_stat sim_cancel (UNIT *uptr);
int32 sim_is_active (UNIT *uptr);
double sim_gtime (void);