Maple

Maple is the only technical computing system that allows you to take advantage of multithreading in your own programs. The Maple programming language offers direct access to launching and controlling threads. In addition, Maple also offers a task-based programming model that simplifies thread management. Writing parallel algorithms using the Task Programming Model reduces and removes many of the difficulties associated with standard threaded programming.

• No explicit threading is required. Users create tasks, not threads.
• Maple schedules the Tasks to the processors so that the code scales to the number of available processors.
• Multiple algorithms written using the Task Programming Model can run at the same time without significant performance impact.
• Complex problems can be solved without requiring traditional synchronization tools such as mutexes and condition variables.
• If such synchronization tools are not used, the function cannot be deadlocked.
• The Task functions are simple and the model mirrors conventional function calling.

Here is an example of using this functionality to compute a convex hull. Given X, a set of points in 2-D, the convex hull is the minimum set of points that define a polygon containing all the points of X. If you imagine the points as pegs on a board, you can find the convex hull by surrounding the pegs by a loop of string and then tightening the string until there is no more slack.