#include "promise.h"
+#include "model.h"
+#include "schedule.h"
-Promise::Promise(ModelAction *act, uint64_t value) {
- this->value=value;
- this->read=act;
- this->numthreads=1;
+/**
+ * Eliminate a thread which no longer can satisfy this promise. Once all
+ * enabled threads have been eliminated, this promise is unresolvable.
+ *
+ * @param tid The thread ID of the thread to eliminate
+ * @return True, if this elimination has invalidated the promise; false
+ * otherwise
+ */
+bool Promise::eliminate_thread(thread_id_t tid)
+{
+ unsigned int id = id_to_int(tid);
+ if (id >= synced_thread.size())
+ synced_thread.resize(id + 1, false);
+ if (synced_thread[id])
+ return false;
+
+ synced_thread[id] = true;
+ return has_failed();
}
+/**
+ * Check if this promise has failed. A promise can fail when all threads which
+ * could possibly satisfy the promise have been eliminated.
+ *
+ * @return True, if this promise has failed; false otherwise
+ */
+bool Promise::has_failed() const
+{
+ unsigned int sync_size = synced_thread.size();
+ int promise_tid = id_to_int(read->get_tid());
+ for (unsigned int i = 1; i < model->get_num_threads(); i++) {
+ if ((i >= sync_size || !synced_thread[i]) && ((int)i != promise_tid) && model->is_enabled(int_to_id(i))) {
+ return false;
+ }
+ }
+ return true;
+}