/** @file nodestack.h
* @brief Stack of operations for use in backtracking.
-*/
+ */
#ifndef __NODESTACK_H__
#define __NODESTACK_H__
-#include <list>
-#include <vector>
#include <cstddef>
-#include "threads.h"
-#include "mymemory.h"
+#include <inttypes.h>
-class ModelAction;
+#include "mymemory.h"
+#include "schedule.h"
+#include "stl-model.h"
+#include "classlist.h"
/**
* @brief A single node in a NodeStack
*/
class Node {
public:
- Node(ModelAction *act = NULL, Node *par = NULL, int nthreads = 1);
+ Node(ModelAction *act);
~Node();
- /* return true = thread choice has already been explored */
- bool has_been_explored(thread_id_t tid);
- /* return true = backtrack set is empty */
- bool backtrack_empty();
-
- void explore_child(ModelAction *act);
- /* return false = thread was already in backtrack */
- bool set_backtrack(thread_id_t id);
- thread_id_t get_next_backtrack();
- bool is_enabled(Thread *t);
- ModelAction * get_action() { return action; }
-
- /** @return the parent Node to this Node; that is, the action that
- * occurred previously in the stack. */
- Node * get_parent() const { return parent; }
-
- bool add_future_value(uint64_t value);
- uint64_t get_future_value();
- bool increment_future_value();
- bool future_value_empty();
-
- void add_read_from(const ModelAction *act);
- const ModelAction * get_read_from();
- bool increment_read_from();
- bool read_from_empty();
- void set_promise(unsigned int i);
- bool get_promise(unsigned int i);
- bool increment_promise();
- bool promise_empty();
-
- void print();
- void print_may_read_from();
+ ModelAction * get_action() const { return action; }
+ void set_uninit_action(ModelAction *act) { uninit_action = act; }
+ ModelAction * get_uninit_action() const { return uninit_action; }
+ void print() const;
MEMALLOC
private:
- void explore(thread_id_t tid);
-
- ModelAction *action;
- Node *parent;
- int num_threads;
- std::vector< bool, MyAlloc<bool> > explored_children;
- std::vector< bool, MyAlloc<bool> > backtrack;
- int numBacktracks;
-
- /** The set of ModelActions that this the action at this Node may read
- * from. Only meaningful if this Node represents a 'read' action. */
- std::vector< const ModelAction *, MyAlloc< const ModelAction * > > may_read_from;
-
- unsigned int read_from_index;
+ ModelAction * const action;
- std::vector< uint64_t, MyAlloc< uint64_t > > future_values;
- std::vector< unsigned int, MyAlloc<unsigned int> > promises;
- unsigned int future_index;
+ /** @brief ATOMIC_UNINIT action which was created at this Node */
+ ModelAction *uninit_action;
};
-typedef std::list< Node *, MyAlloc< Node * > > node_list_t;
+typedef ModelVector<Node *> node_list_t;
/**
* @brief A stack of nodes
public:
NodeStack();
~NodeStack();
+
+ void register_engine(const ModelExecution *exec);
ModelAction * explore_action(ModelAction *act);
- Node * get_head();
- Node * get_next();
+ Node * get_head() const;
+ Node * get_next() const;
void reset_execution();
- void pop_restofstack(int numAhead);
- int get_total_nodes() { return total_nodes; }
-
- void print();
+ void full_reset();
+ void print() const;
MEMALLOC
private:
node_list_t node_list;
- node_list_t::iterator iter;
-
- int total_nodes;
+ const struct model_params * get_params() const;
+
+ /** @brief The model-checker execution object */
+ const ModelExecution *execution;
+
+ /**
+ * @brief the index position of the current head Node
+ *
+ * This index is relative to node_list. The index should point to the
+ * current head Node. It is negative when the list is empty.
+ */
+ int head_idx;
};
-#endif /* __NODESTACK_H__ */
+#endif /* __NODESTACK_H__ */