First pass at a serializer object, may need to work on naming of object and functions:

Intended Use:
A SimObject will call the serializer when it needs the state to be serializable (i.e. switchCPUs, checkpoint, switch memory access model).  It will call the requestSeialization() function.
The Serializer will signal all the objects in its list to drain their state via the SimObject method drain().  Drain() has a default implementation to just signal done.
When each object is drained it will signal the Serializer that it has drained via the signalDrained() function.
The Serializer will collect these signals, when all have drained it will signal the initial requestor via serializationComplete() method in the SimObject.
Once that object is done, it will signal the Serializer to resumeExecution().
The Serializer will signal all the objects in its list to resume via the resume() method on the SimObject.

SConscript:
    Add serializer object to build list
sim/sim_object.cc:
    Add default behavior for drain (just signal finished, must be overided if you really must drain something)
sim/sim_object.hh:
    Add functions for serializer

--HG--
extra : convert_revision : 15aa2d1b42010c2d703bef9114c11d079c216170

diff --git a/SConscript b/SConscript
index d49bee5e423b9626543d05c3e41e3f501dc89018..a2d5de2795b59dcc6786793aa05f5f707700c2a4 100644 (file)
--- a/SConscript
+++ b/SConscript
@@ -62,6 +62,7 @@ base_sources = Split('''
        base/range.cc
        base/random.cc
        base/sat_counter.cc
+        base/serializer.cc
        base/socket.cc
        base/statistics.cc
        base/str.cc

diff --git a/sim/sim_object.cc b/sim/sim_object.cc
index 151ba68a7d60be050f12a678129188e96d7719bd..17d58ba4fa5d75ca51f303938e87cecc498c0e5b 100644 (file)
--- a/sim/sim_object.cc
+++ b/sim/sim_object.cc
@@ -34,6 +34,7 @@
 #include "base/misc.hh"
 #include "base/trace.hh"
 #include "base/stats/events.hh"
+#include "base/serializer.hh"
 #include "sim/configfile.hh"
 #include "sim/host.hh"
 #include "sim/sim_object.hh"
@@ -248,4 +249,10 @@ SimObject::recordEvent(const std::string &stat)
         Stats::recordEvent(stat);
 }
 
+void
+SimObject::drain(Serializer *serializer)
+{
+    serializer->signalDrained();
+}
+
 DEFINE_SIM_OBJECT_CLASS_NAME("SimObject", SimObject)

diff --git a/sim/sim_object.hh b/sim/sim_object.hh
index 5db62dd5158b323c7d4326ce838d11a172fe7551..76aba7ea1da0ee0675a1099f8416bbe7ab88ed4f 100644 (file)
--- a/sim/sim_object.hh
+++ b/sim/sim_object.hh
@@ -41,6 +41,8 @@
 #include "sim/serialize.hh"
 #include "sim/startup.hh"
 
+class Serializer;
+
 /*
  * Abstract superclass for simulation objects.  Represents things that
  * correspond to physical components and can be specified via the
@@ -96,6 +98,13 @@ class SimObject : public Serializable, protected StartupCallback
     // static: call nameOut() & serialize() on all SimObjects
     static void serializeAll(std::ostream &);
 
+    // Methods to drain objects in order to take checkpoints
+    // Or switch from timing -> atomic memory model
+    virtual void drain(Serializer *serializer);
+    virtual void resume() { return;} ;
+    virtual void serializationComplete()
+    { assert(0 && "Unimplemented"); };
+
 #ifdef DEBUG
   public:
     bool doDebugBreak;