Singular

D.15.20 tasks_lib

Library:

tasks.lib

Purpose:

A parallel framework based on tasks

Author:

Andreas Steenpass, e-mail: steenpass@mathematik.uni-kl.de

Overview:

This library provides a parallel framework based on tasks. It introduces a new Singular type task; an object of this type is a command (given by a string) applied to a list of arguments. Tasks can be computed in parallel via the procedures in this library and they can even be started recursively, i.e. from within other tasks.

tasks.lib respects the limits for computational resources defined in resources_lib, i.e., all tasks within the same Singular session will not use more computational resources than provided via resources.lib, even if tasks are started recursively.

The Singular library parallel_lib provides implementations of several parallel 'skeletons' based on tasks.lib.

Procedures:

D.15.20.1 createTask		create a task
D.15.20.2 killTask		kill a task
D.15.20.3 copyTask		copy a task
D.15.20.4 compareTasks		compare two tasks
D.15.20.5 printTask		print a task
D.15.20.6 startTasks		start tasks
D.15.20.7 stopTask		stop a task
D.15.20.8 waitTasks		wait for a certain number of tasks
D.15.20.9 waitAllTasks		wait for all tasks
D.15.20.10 pollTask		poll a task
D.15.20.11 getCommand		get the command of a task
D.15.20.12 getArguments		get the arguments of a task
D.15.20.13 getResult		get the result of a task
D.15.20.14 getState		get the state of a task