more changes towards keeping track of promises resolved by a given write statement

[model-checker.git] / nodestack.cc

diff --git a/nodestack.cc b/nodestack.cc
index 082835802629ac989c13e57ed4adbdd8de81eb48..6eb71dc89c8f15097514781ed95209304414d1f6 100644 (file)
--- a/nodestack.cc
+++ b/nodestack.cc
@@ -57,19 +57,60 @@ void Node::print_may_read_from()
                (*it)->print();
 }
 
+void Node::set_promise(uint32_t i) {
+       if (i>=promises.size())
+               promises.resize(i+1,0);
+       promises[i]=1;
+}
+
+bool Node::get_promise(uint32_t i) {
+       return (promises[i]==2);
+}
+
+bool Node::increment_promises() {
+       for (unsigned int i=0;i<promises.size();i++) {
+               if (promises[i]==1) {
+                       promises[i]=2;
+                       do {
+                               i--;
+                               if (promises[i]==2)
+                                       promises[i]=1;
+                       } while(i>0);
+                       return true;
+               }
+       }
+       return false;
+}
+
+bool Node::promises_empty() {
+       for (unsigned int i=0;i<promises.size();i++)
+               if (promises[i]==1)
+                       return false;
+       return true;
+}
+
 /**
  * Adds a value from a weakly ordered future write to backtrack to.
  * @param value is the value to backtrack to.
  */
 
 bool Node::add_future_value(uint64_t value) {
-       for(int i=0;i<future_values.size();i++)
+       for(unsigned int i=0;i<future_values.size();i++)
                if (future_values[i]==value)
                        return false;
        future_values.push_back(value);
        return true;
 }
 
+/** 
+ * Checks whether the future_values set for this node is empty.
+ * @return true if the future_values set is empty.
+ */
+
+bool Node::futurevalues_empty() {
+       return ((future_index+1)>=future_values.size());
+}
+
 
 /**
  * Checks if the Thread associated with this thread ID has been explored from
@@ -102,14 +143,7 @@ bool Node::readsfrom_empty() {
        return ((read_from_index+1)>=may_read_from.size());
 }
 
-/** 
- * Checks whether the future_values set for this node is empty.
- * @return true if the future_values set is empty.
- */
 
-bool Node::futurevalues_empty() {
-       return ((future_index+1)>=future_values.size());
-}
 
 /**
  * Mark the appropriate backtracking information for exploring a thread choice.