systemc: Implement pending activity related functions

Track the number of notifications/timeouts that are scheduled at any
given time. This lets us implement sc_pending_activity_at_current_time,
sc_pending_activity_at_future_time, and sc_time_to_pending_activity.

Change-Id: Ia3fcd29bdbfe1a6c77eb52ce4836982d4705263c
Reviewed-on: https://gem5-review.googlesource.com/12032
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

1 files changed, 11 insertions, 4 deletions

diff --git a/src/systemc/core/process.cc b/src/systemc/core/process.cc
index 7ed187fe1..ad297a23c 100644
--- a/src/systemc/core/process.cc
+++ b/src/systemc/core/process.cc
@@ -37,16 +37,23 @@ namespace sc_gem5
 {
 
 SensitivityTimeout::SensitivityTimeout(Process *p, ::sc_core::sc_time t) :
-    Sensitivity(p), timeoutEvent(this), timeout(t)
+    Sensitivity(p), timeoutEvent(this), time(t)
 {
-    Tick when = scheduler.eventQueue().getCurTick() + timeout.value();
-    scheduler.eventQueue().schedule(&timeoutEvent, when);
+    Tick when = scheduler.getCurTick() + time.value();
+    scheduler.schedule(&timeoutEvent, when);
 }
 
 SensitivityTimeout::~SensitivityTimeout()
 {
     if (timeoutEvent.scheduled())
-        scheduler.eventQueue().deschedule(&timeoutEvent);
+        scheduler.deschedule(&timeoutEvent);
+}
+
+void
+SensitivityTimeout::timeout()
+{
+    scheduler.eventHappened();
+    notify();
 }
 
 SensitivityEvent::SensitivityEvent(