#include <inttypes.h>
+#include "modeltypes.h"
+#include "mymemory.h"
+#include "stl-model.h"
+
class ModelAction;
+class ModelExecution;
+
+struct future_value {
+ uint64_t value;
+ modelclock_t expiration;
+ thread_id_t tid;
+};
class Promise {
public:
- Promise(ModelAction *act, uint64_t value, modelclock_t expiration) :
- value(value), expiration(expiration), read(act), numthreads(1)
- { }
- modelclock_t get_expiration() const {return expiration;}
- ModelAction * get_action() const { return read; }
- int increment_threads() { return ++numthreads; }
- uint64_t get_value() const { return value; }
+ Promise(const ModelExecution *execution, ModelAction *read, struct future_value fv);
+ 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;
+ bool has_failed() const;
+ void set_write(const ModelAction *act) { write = act; }
+ const ModelAction * get_write() const { return write; }
+ int get_num_available_threads() const { return num_available_threads; }
+ bool is_compatible(const ModelAction *act) const;
+ bool is_compatible_exclusive(const ModelAction *act) const;
+ bool same_value(const ModelAction *write) const;
+ bool same_location(const ModelAction *act) const;
+
+ modelclock_t get_expiration() const { return fv.expiration; }
+ uint64_t get_value() const { return fv.value; }
+ struct future_value get_fv() const { return fv; }
+
+ int get_index() const;
+
+ void print() const;
+ bool equals(const Promise *x) const { return this == x; }
+ bool equals(const ModelAction *x) const { return false; }
+
+ SNAPSHOTALLOC
private:
- const uint64_t value;
- const modelclock_t expiration;
- ModelAction * const read;
- unsigned int numthreads;
+ /** @brief The execution which created this Promise */
+ const ModelExecution *execution;
+
+ /** @brief Thread ID(s) for thread(s) that potentially can satisfy this
+ * promise */
+ SnapVector<bool> available_thread;
+
+ int num_available_threads;
+
+ const future_value fv;
+
+ /** @brief The action(s) which read the promised future value */
+ SnapVector<ModelAction *> readers;
+
+ const ModelAction *write;
};
#endif