- Added a bit of resource policy mamagement. Still far from being usefu.

git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@958 3ecf2c5c-341e-0410-92b4-d18e462d057c

Makefile.am

@@ -157,6 +157,7 @@ src_backend_libbackend_la_SOURCES = \
 		src/backend/cpu_policy.cc \
 		src/backend/cpu_policy_exception.cc \
 		src/backend/cpu_policy_manager.cc \
+		src/backend/default_resource_policy_manager.cc \
 		src/backend/dynamic_process.cc \
 		src/backend/dynamic_request.cc \
 		src/backend/dynamic_resource.cc \
@@ -181,6 +182,7 @@ src_backend_libbackend_la_SOURCES = \
 		src/backend/resource.cc \
 		src/backend/resource_policies_gatekeeper.cc \
 		src/backend/resource_policy.cc \
+		src/backend/resource_policy_lifo.cc \
 		src/backend/resource_policy_manager.cc \
 		src/backend/schedulable.cc \
 		src/backend/scheduler.cc \
@@ -209,6 +211,7 @@ pkginclude_HEADERS += \
 		src/backend/cpu_policy.hh \
 		src/backend/cpu_policy_exception.hh \
 		src/backend/cpu_policy_manager.hh \
+		src/backend/default_resource_policy_manager.hh \
 		src/backend/environment.hh \
 		src/backend/global_preferences.hh \
 		src/backend/history.hh \
@@ -227,6 +230,7 @@ pkginclude_HEADERS += \
 		src/backend/resource.hh \
 		src/backend/resource_policies_gatekeeper.hh \
 		src/backend/resource_policy.hh \
+		src/backend/resource_policy_lifo.hh \
 		src/backend/resource_policy_manager.hh \
 		src/backend/process.hh \
 		src/backend/schedulable.hh \

src/backend/concrete_simulation.cc

@@ -22,6 +22,7 @@
 #include "simulation_observer.hh"
 #include "scheduler.hh"
 #include "cpu_policies_gatekeeper.hh"
+#include "resource_policies_gatekeeper.hh"
 
 #include <cassert>
 
@@ -38,8 +39,9 @@ using namespace memory;
 
 ConcreteSimulation::ConcreteSimulation() :
   Simulation(), _state(state_stopped), 
-  _mode(mode_continuous), _policy(NULL)
+  _mode(mode_continuous), _policy(NULL), _resource_policy(NULL)
-{}
+{
+}
 
 void
 ConcreteSimulation::set_mode(const mode new_mode)
@@ -158,7 +160,13 @@ ConcreteSimulation::step()
   if (get_policy() == NULL)
     {
       stop();
-      throw NullPolicyException("no policy selected");
+      throw NullPolicyException("no CPU policy selected");
+    }
+
+  if (get_resource_policy() == NULL)
+    {
+      stop();
+      throw NullPolicyException("no resource policy selected");
     }
   
   try
@@ -166,7 +174,7 @@ ConcreteSimulation::step()
       //step forward
       bool yet_to_finish = true;
 			if (_front == get_history().get_size() - 1)
-				yet_to_finish = Scheduler::get_instance().step_forward(_history, *get_policy());
+				yet_to_finish = Scheduler::get_instance().step_forward(_history, *get_policy(), *get_resource_policy());
 			_front++;
 			return yet_to_finish;
     }
@@ -239,3 +247,18 @@ ConcreteSimulation::get_policy()
 {
   return _policy;
 }
+
+
+void
+ConcreteSimulation::set_resource_policy(ResourcePolicy* p)
+{
+  ResourcePoliciesGatekeeper::get_instance().activate_policy(&_history, p);
+  _resource_policy = p;
+}
+
+
+ResourcePolicy*
+ConcreteSimulation::get_resource_policy()
+{
+  return _resource_policy;
+}

src/backend/concrete_simulation.hh

@@ -61,11 +61,14 @@ namespace sgpem
      */
     void set_policy(CPUPolicy*) throw(CPUPolicyException);
 
+    void set_resource_policy(ResourcePolicy*);
+
     ConcreteHistory& get_history();
 
 		const ConcreteHistory& get_history() const;
 
     CPUPolicy* get_policy();
+    ResourcePolicy * get_resource_policy();
 
 
   private:
@@ -73,6 +76,7 @@ namespace sgpem
     mode   _mode;
     ConcreteHistory _history;
     CPUPolicy* _policy;
+    ResourcePolicy* _resource_policy;
   };
 
 }

src/backend/scheduler.cc

@@ -56,7 +56,7 @@ static void collect_threads(const std::vector<Process*>& procs, Threads& collect
 static void prepare_ready_queue(ConcreteEnvironment& snapshot, const Threads& all_threads);
 static void terminate_all_requests_of(DynamicThread& thread, ConcreteEnvironment& environment);
 static void update_allocated_requests(DynamicThread& running_thread, ConcreteEnvironment& environment);
-static void raise_new_requests(DynamicThread& running_thread, ConcreteEnvironment& environment);
+static void raise_new_requests(DynamicThread& running_thread, ConcreteEnvironment& environment, ResourcePolicy& resource_policy);
 static void look_for_mutant_request_states(ConcreteEnvironment& environment, unsigned int& alive_threads);
 static void determine_subr_allocable_status(const DynamicRequest& req, DynamicSubRequest& subr, 
                                             const Resource& res, SubRequestQueue& queue);
@@ -152,7 +152,7 @@ update_allocated_requests(DynamicThread&        running_thread,
 // Remember that a thread may run only if all of its requests are either FUTURE,
 // ALLOCATED or EXHAUSTED.
 void
-raise_new_requests(DynamicThread& running_thread, ConcreteEnvironment& environment)
+raise_new_requests(DynamicThread& running_thread, ConcreteEnvironment& environment, ResourcePolicy& resource_policy)
 {
   // Go for all dynamic requests of this thread
   Requests& reqs = running_thread.get_dynamic_requests();
@@ -176,6 +176,7 @@ raise_new_requests(DynamicThread& running_thread, ConcreteEnvironment& environme
             /// TODO: right here, right now we should call the resource policy to                                                          
             /// update the queue. Updates the state of the subrequest depending                                                            
             /// on the position in the queue, as explained before.
+						resource_policy.enforce();
 
             // Get the number of places for the corresponding resource
             Resource& resource = *environment.get_resources().find(rkey)->second;
@@ -378,7 +379,7 @@ Scheduler::get_policy()
 
 
 bool
-Scheduler::step_forward(History& history, CPUPolicy& cpu_policy)
+Scheduler::step_forward(History& history, CPUPolicy& cpu_policy, ResourcePolicy& resource_policy)
   throw(UserInterruptException, MalformedPolicyException)
 {
   // This very method should be exclusive: no concurrent behaviour, from when we
@@ -504,7 +505,7 @@ Scheduler::step_forward(History& history, CPUPolicy& cpu_policy)
     //   * else we've to select another running thread, so we continue down in the method
     if(running_thread != NULL && running_thread->get_state() == Schedulable::state_running)
       {
-        raise_new_requests(*running_thread, *new_snapshot); 
+        raise_new_requests(*running_thread, *new_snapshot, resource_policy); 
         if(running_thread->get_state() != Schedulable::state_blocked)
           goto final_cleanup;
         else
@@ -539,7 +540,7 @@ Scheduler::step_forward(History& history, CPUPolicy& cpu_policy)
           }
 
         // Now we check if our candidate blocks on a new request
-        raise_new_requests(candidate, *new_snapshot);
+        raise_new_requests(candidate, *new_snapshot, resource_policy);
         if(candidate.get_state() != Schedulable::state_blocked)
           // If we got here, our candidate can run
           we_ve_got_a_winner /*!hurrah!*/ = true;

src/backend/scheduler.hh

@@ -30,6 +30,7 @@ namespace sgpem
 
 #include "history.hh"
 #include "cpu_policy.hh"
+#include "resource_policy.hh"
 #include "ready_queue.hh"
 #include "user_interrupt_exception.hh"
 #include "malformed_policy_exception.hh"
@@ -67,7 +68,7 @@ namespace sgpem
        
         \return false If the simulation has ended, true otherwise
      */
-    bool       step_forward(History& history, CPUPolicy& cpu_policy) throw(UserInterruptException, MalformedPolicyException);
+    bool       step_forward(History& history, CPUPolicy& cpu_policy, ResourcePolicy& resource_policy) throw(UserInterruptException, MalformedPolicyException);
 
     /**
        \brief Returns the policy that will be used to generate the simulation at the next instant.

src/backend/simulation.hh

@@ -25,6 +25,7 @@ namespace sgpem
 {
   class ConcreteSimulation;
   class CPUPolicy;
+  class ResourcePolicy;
 	class SimulationObserver;
 }
 
@@ -135,15 +136,24 @@ namespace sgpem
     virtual state get_state() const = 0;
 
     /**
-      \brief Setup the policy to be used by the system.
+      \brief Setup the CPU policy to be used by the system.
      */
     virtual void set_policy(CPUPolicy*) = 0;
 
     /**
-      \return The policy currently in use.
+      \brief Setup the resource policy to be used by the system.
+     */
+    virtual void set_resource_policy(ResourcePolicy*) = 0;
+    /**
+      \return The CPU policy currently in use.
      */
     virtual CPUPolicy* get_policy() = 0;
 
+    /**
+      \return The resource policy currently in use.
+     */
+    virtual ResourcePolicy* get_resource_policy() = 0;
+
     virtual History& get_history() = 0;
 
     virtual const History& get_history() const = 0;

src/text_simulation.cc

@@ -29,6 +29,8 @@
 #include "backend/serializer.hh"
 #include "backend/process.hh"
 #include "backend/resource.hh"
+// FIXME: remove the following and use the gatekeeper
+#include "backend/resource_policy_lifo.hh"
 #include "backend/thread.hh"
 #include "backend/request.hh"
 #include "backend/sub_request.hh"
@@ -761,7 +763,11 @@ TextSimulation::on_set(const Tokens& arguments)
         for (CPUPolicyIt it = policies.begin(); it != policies.end(); ++it)
         {
           if (policy == 0)
+          {
             Simulation::get_instance().set_policy(*it);
+            // FIXME: dedicate a function to set resource policy
+            Simulation::get_instance().set_resource_policy(new ResourcePolicyLiFo()); // leak leak leak
+          }
 
           --policy;
         }
@@ -1586,7 +1592,7 @@ operator<<(ostream& os, Schedulable::state state)
   switch (state)
   {
   case Schedulable::state_running:
-    os << _("RUNNING @");
+    os << _(">> RUNNING <<");
     break;
   case Schedulable::state_ready:
     os << _("READY");