systemc: Implement most of sc_object.

To avoid making it hard to change sc_object's implementation in the
future, this change keeps most of the data members out of sc_object and
keeps them in a seperate Object which is managed independently but
still matches to the sc_objects one to one.

This change also moves away from the SystemC/sc_gem5 namespace pair in
favor of sc_gem5. Having two namespaces with classes, etc, living in
both was complicating things. Having to use a namespace that doesn't
fit in one scheme or the other isn't great, but it's the lesser of two
evils.

Change-Id: Ib59c3c515ca98c7fe519c59e9fe9270304b71cc0
Reviewed-on: https://gem5-review.googlesource.com/11611
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

1 files changed, 27 insertions, 10 deletions

diff --git a/src/systemc/core/module.cc b/src/systemc/core/module.cc
index 97a4a9ffa..3b7e922e3 100644
--- a/src/systemc/core/module.cc
+++ b/src/systemc/core/module.cc
@@ -29,42 +29,59 @@
 
 #include "systemc/core/module.hh"
 
+#include <cassert>
 #include <list>
 
 #include "base/logging.hh"
 
-namespace SystemC
+namespace sc_gem5
 {
 
 namespace
 {
 
 std::list<Module *> _modules;
-
-Module *_top_module = nullptr;
+Module *_new_module;
 
 } // anonymous namespace
 
+Module::Module(const char *name) : _name(name), _sc_mod(nullptr), _obj(nullptr)
+{
+    panic_if(_new_module, "Previous module not finished.\n");
+    _new_module = this;
+}
+
 void
-Module::push()
+Module::finish(Object *this_obj)
 {
-    if (!_top_module)
-        _top_module = this;
+    assert(!_obj);
+    _obj = this_obj;
     _modules.push_back(this);
+    _new_module = nullptr;
 }
 
 void
 Module::pop()
 {
-    panic_if(_modules.size(), "Popping from empty module list.\n");
+    panic_if(!_modules.size(), "Popping from empty module list.\n");
     panic_if(_modules.back() != this,
             "Popping module which isn't at the end of the module list.\n");
+    panic_if(_new_module, "Pop with unfinished module.\n");
+    _modules.pop_back();
+}
+
+Module *
+currentModule()
+{
+    if (_modules.empty())
+        return nullptr;
+    return _modules.back();
 }
 
 Module *
-topModule()
+newModule()
 {
-    return _top_module;
+    return _new_module;
 }
 
-} // namespace SystemC
+} // namespace sc_gem5