systemc: Implement sc_get_current_process_handle's other personality.

When run during simulation, sc_get_current_process_handle returns a
handle for the currently running process or a invalid handle if no
process is running (ie sc_main is running).

When run during elaboration, it returns a handle to the most recently
created process. This second context is what this change handles.

Change-Id: I3fb247b9b7bf83891c782966cfef474753159158
Reviewed-on: https://gem5-review.googlesource.com/12030
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

diff --git a/src/systemc/core/sc_process_handle.cc b/src/systemc/core/sc_process_handle.cc
index c4014b74757472ba90d6564a745f65da502c162e..e0f6a8186dea347ad801b6cc9bd9a8851565b44b 100644 (file)
--- a/src/systemc/core/sc_process_handle.cc
+++ b/src/systemc/core/sc_process_handle.cc
@@ -30,6 +30,7 @@
 #include "base/logging.hh"
 #include "systemc/core/process.hh"
 #include "systemc/core/scheduler.hh"
+#include "systemc/ext/core/sc_main.hh"
 #include "systemc/ext/core/sc_process_handle.hh"
 
 namespace sc_core
@@ -292,7 +293,10 @@ sc_process_handle::sync_reset_off(
 sc_process_handle
 sc_get_current_process_handle()
 {
-    return sc_process_handle(::sc_gem5::scheduler.current());
+    if (sc_is_running())
+        return sc_process_handle(::sc_gem5::scheduler.current());
+    else
+        return sc_process_handle(::sc_gem5::Process::newest());
 }
 
 bool