promise: record multiple readers in the same Promise

[model-checker.git] / promise.h

diff --git a/promise.h b/promise.h
index c131d743aa185d2972cd2d1922fb7ac43d6c3c8d..5ea7dc58d0470a29a537985c6322f8792be1f856 100644 (file)
--- a/promise.h
+++ b/promise.h
@@ -24,7 +24,9 @@ struct future_value {
 class Promise {
  public:
        Promise(ModelAction *read, struct future_value fv);
-       ModelAction * get_action() const { return read; }
+       bool add_reader(ModelAction *reader);
+       ModelAction * get_reader(unsigned int i) const;
+       unsigned int get_num_readers() const { return readers.size(); }
        bool eliminate_thread(thread_id_t tid);
        void add_thread(thread_id_t tid);
        bool thread_is_available(thread_id_t tid) const;
@@ -54,8 +56,8 @@ class Promise {
 
        const future_value fv;
 
-       /** @brief The action which reads a promised value */
-       ModelAction * const read;
+       /** @brief The action(s) which read the promised future value */
+       std::vector< ModelAction *, SnapshotAlloc<ModelAction *> > readers;
 
        const ModelAction *write;
 };