Object-transactional Extension of Cilk++

Abstract

In this paper, we consider the problem of developing compact tools that support programming in dynamic transactional memory, implying operational generation of transactional pages, for the Cilk++ language. It is argued that such an implementation requires weakened transaction isolation. The current state of the problem is analyzed. It is noted that the existing solutions are quite cumbersome, although they allow you to work with complex data structures such as lists and trees. It is argued that it is necessary to develop new solutions in the style of minimalism based on the use of specialized classes (generating transactional pages; implementing consistent transactional variables) in combination with a set of keywords characteristic of Cilk++. Appropriate new solutions are proposed. New syntax elements are introduced, implemented using language extension tools specific to the Planning C platform. The semantics of new language elements is described. It is noted that, unlike analogues, the developed tools allow declaratively to "build" transactions into a network (network schedule of work), which determines the order of execution of transactions and the potential for parallelism that exists at the same time. The proposed approach was tested on the example of the task of constructing a histogram. It is also mentioned about the successful solution, using the developed tools, of the problem of training an artificial neural network by the method of error back propagation and the problem of integer linear programming by the method of branches and boundaries.