systemc: Implement the sensitivity mechanism.

This change lets processes be sensitive to events, timeouts, etc.

Change-Id: If30a256dfa8a2e92192c1f9c96b48e2aa28ec27e
Reviewed-on: https://gem5-review.googlesource.com/11713
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

2 files changed, 24 insertions, 2 deletions

diff --git a/src/systemc/ext/core/sc_event.hh b/src/systemc/ext/core/sc_event.hh
index d037a84bf..c2154967d 100644
--- a/src/systemc/ext/core/sc_event.hh
+++ b/src/systemc/ext/core/sc_event.hh
@@ -39,6 +39,8 @@ namespace sc_gem5
 {
 
 class Event;
+class SensitivityEventAndList;
+class SensitivityEventOrList;
 
 }
 
@@ -100,6 +102,7 @@ class sc_event_and_list
 
   private:
     friend class sc_event_and_expr;
+    friend class sc_gem5::SensitivityEventAndList;
 
     explicit sc_event_and_list(bool auto_delete);
 
@@ -131,6 +134,7 @@ class sc_event_or_list
 
   private:
     friend class sc_event_or_expr;
+    friend class sc_gem5::SensitivityEventOrList;
 
     explicit sc_event_or_list(bool auto_delete);
 
diff --git a/src/systemc/ext/core/sc_port.hh b/src/systemc/ext/core/sc_port.hh
index 262ca382b..0f5a66189 100644
--- a/src/systemc/ext/core/sc_port.hh
+++ b/src/systemc/ext/core/sc_port.hh
@@ -30,9 +30,19 @@
 #ifndef __SYSTEMC_EXT_CORE_SC_PORT_HH__
 #define __SYSTEMC_EXT_CORE_SC_PORT_HH__
 
+#include <vector>
+
 #include "sc_module.hh" // for sc_gen_unique_name
 #include "sc_object.hh"
 
+namespace sc_gem5
+{
+
+class BindInfo;
+class PendingSensitivityPort;
+
+};
+
 namespace sc_core
 {
 
@@ -48,11 +58,13 @@ enum sc_port_policy
 class sc_port_base : public sc_object
 {
   public:
-    sc_port_base(const char *name, int n, sc_port_policy p) : sc_object(name)
-    {}
+    sc_port_base(const char *name, int n, sc_port_policy p);
 
     void warn_unimpl(const char *func) const;
 
+    int maxSize() const;
+    int size() const;
+
   protected:
     // Implementation defined, but depended on by the tests.
     void bind(sc_interface &);
@@ -61,6 +73,12 @@ class sc_port_base : public sc_object
     // Implementation defined, but depended on by the tests.
     virtual int vbind(sc_interface &) = 0;
     virtual int vbind(sc_port_base &) = 0;
+
+  private:
+    friend class ::sc_gem5::PendingSensitivityPort;
+
+    std::vector<::sc_gem5::BindInfo *> _gem5BindInfo;
+    int _maxSize;
 };
 
 template <class IF>