Abstract: Apparatus, methods, and program products are disclosed that provide a technology that implicitly isolates a portion of a transactional memory that is shared between multiple threads for exclusive use by an isolating thread without the possibility of other transactions modifying the isolated portion of the transactional memory. In some of the described embodiments read locations of a shared memory are covered by a first set of lock objects, and write locations are covered by a second set of lock objects, each lock object in each set having a reader mode and a writer mode. Some of these embodiments acquiring each lock object in the first set using the reader mode, and acquire each lock object in the second set using the writer mode. These embodiments store result data values at write locations in the shared memory subsequent to the acquiring said first and second set of lock objects.

Abstract: Apparatus, methods, and program products are disclosed that provide a technology that implicitly isolates a portion of a transactional memory that is shared between multiple threads for exclusive use by an isolating thread without the possibility of other transactions modifying the isolated portion of the transactional memory.