read_from_promise_idx(-1),
future_values(),
future_index(-1),
+ resolve_promise(),
+ resolve_promise_idx(-1),
relseq_break_writes(),
relseq_break_index(0),
misc_index(0),
model_print(" rel seq break: %s\n", relseq_break_empty() ? "empty" : "non-empty");
}
+/*********************************** promise **********************************/
+
/**
* Sets a promise to explore meeting with the given node.
* @param i is the promise index.
*/
-void Node::set_promise(unsigned int i, bool is_rmw)
-{
- if (i >= promises.size())
- promises.resize(i + 1, PROMISE_IGNORE);
- if (promises[i] == PROMISE_IGNORE) {
- promises[i] = PROMISE_UNFULFILLED;
- if (is_rmw)
- promises[i] |= PROMISE_RMW;
- }
+void Node::set_promise(unsigned int i)
+{
+ if (i >= resolve_promise.size())
+ resolve_promise.resize(i + 1, false);
+ resolve_promise[i] = true;
}
/**
* Looks up whether a given promise should be satisfied by this node.
* @param i The promise index.
- * @return true if the promise should be satisfied by the given model action.
+ * @return true if the promise should be satisfied by the given ModelAction.
*/
bool Node::get_promise(unsigned int i) const
{
- return (i < promises.size()) && ((promises[i] & PROMISE_MASK) == PROMISE_FULFILLED);
+ return (i < resolve_promise.size()) && (int)i == resolve_promise_idx;
}
/**
- * Increments to the next combination of promises.
+ * Increments to the next promise to resolve.
* @return true if we have a valid combination.
*/
bool Node::increment_promise()
{
DBG();
- unsigned int rmw_count = 0;
- for (unsigned int i = 0; i < promises.size(); i++) {
- if (promises[i] == (PROMISE_RMW|PROMISE_FULFILLED))
- rmw_count++;
- }
-
- for (unsigned int i = 0; i < promises.size(); i++) {
- if ((promises[i] & PROMISE_MASK) == PROMISE_UNFULFILLED) {
- if ((rmw_count > 0) && (promises[i] & PROMISE_RMW)) {
- //sending our value to two rmws... not going to work..try next combination
- continue;
- }
- promises[i] = (promises[i] & PROMISE_RMW) | PROMISE_FULFILLED;
- while (i > 0) {
- i--;
- if ((promises[i] & PROMISE_MASK) == PROMISE_FULFILLED)
- promises[i] = (promises[i] & PROMISE_RMW) | PROMISE_UNFULFILLED;
- }
+ if (resolve_promise.empty())
+ return false;
+ int prev_idx = resolve_promise_idx;
+ resolve_promise_idx++;
+ for ( ; resolve_promise_idx < (int)resolve_promise.size(); resolve_promise_idx++)
+ if (resolve_promise[resolve_promise_idx])
return true;
- } else if (promises[i] == (PROMISE_RMW|PROMISE_FULFILLED)) {
- rmw_count--;
- }
- }
+ resolve_promise_idx = prev_idx;
return false;
}
*/
bool Node::promise_empty() const
{
- bool fulfilledrmw = false;
- for (int i = promises.size() - 1; i >= 0; i--) {
- if (promises[i] == PROMISE_UNFULFILLED)
- return false;
- if (!fulfilledrmw && ((promises[i] & PROMISE_MASK) == PROMISE_UNFULFILLED))
+ for (int i = resolve_promise_idx + 1; i < (int)resolve_promise.size(); i++)
+ if (i >= 0 && resolve_promise[i])
return false;
- if (promises[i] == (PROMISE_FULFILLED | PROMISE_RMW))
- fulfilledrmw = true;
- }
return true;
}
+/** @brief Clear any promise-resolution information for this Node */
+void Node::clear_promise_resolutions()
+{
+ resolve_promise.clear();
+ resolve_promise_idx = -1;
+}
+
+/******************************* end promise **********************************/
+
void Node::set_misc_max(int i)
{
misc_max = i;
backtrack[i] = false;
for (unsigned int i = 0; i < explored_children.size(); i++)
explored_children[i] = false;
+ numBacktracks = 0;
}
bool Node::is_enabled(Thread *t) const
*/
bool Node::increment_read_from()
{
- promises.clear();
+ clear_promise_resolutions();
if (increment_read_from_past()) {
read_from_status = READ_FROM_PAST;
return true;
* where this->action is a 'read'.
* @return The current element in read_from_promises
*/
-const Promise * Node::get_read_from_promise() const
+Promise * Node::get_read_from_promise() const
{
- if (read_from_promise_idx < 0 || read_from_promise_idx >= ((int)read_from_promises.size()))
- return NULL;
+ ASSERT(read_from_promise_idx >= 0 && read_from_promise_idx < ((int)read_from_promises.size()));
return read_from_promises[read_from_promise_idx]->get_reads_from_promise();
}
+/**
+ * Gets a particular 'read-from-promise' form this Node. Only vlaid for a node
+ * where this->action is a 'read'.
+ * @param i The index of the Promise to get
+ * @return The Promise at index i, if the Promise is still available; NULL
+ * otherwise
+ */
+Promise * Node::get_read_from_promise(int i) const
+{
+ return read_from_promises[i]->get_reads_from_promise();
+}
+
+/** @return The size of the read-from-promise set */
+int Node::get_read_from_promise_size() const
+{
+ return read_from_promises.size();
+}
+
/**
* Checks whether the read_from_promises set for this node is empty.
* @return true if the read_from_promises set is empty.
bool Node::increment_relseq_break()
{
DBG();
- promises.clear();
if (relseq_break_index < ((int)relseq_break_writes.size())) {
relseq_break_index++;
return (relseq_break_index < ((int)relseq_break_writes.size()));