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threads - functions

This folder contains a simple multi-threading example illustrating how to create threads for competing goals, which one performing the same task using different methods. The first goal to complete leads to the immediate termination of the threads running the remaining goals.

Print Logtalk, Prolog backend, and kernel versions (if running as a notebook):

%versions

Start by loading the example:

logtalk_load(functions(loader)).

Find the roots of some functions using each one of provided methods:

bisection::find_root(f1, 1.0, 2.3, 1.0e-15, Zero).

<!-- Zero = 2.0. -->

newton::find_root(f1, 1.0, 2.3, 1.0e-15, Zero).

<!-- Zero = 2.0. -->

muller::find_root(f1, 1.0, 2.3, 1.0e-15, Zero).

<!-- Zero = 2.0. -->

bisection::find_root(f2, 1.0, 1.3, 1.0e-15, Zero).

<!-- Zero = 1.25809265664599. -->

newton::find_root(f2, 1.0, 1.3, 1.0e-15, Zero).

<!-- Zero = 1.25809265664599. -->

muller::find_root(f2, 1.0, 1.3, 1.0e-15, Zero).

<!-- Zero = 1.25809265664599. -->

bisection::find_root(humps, -1.0, 2.0, 1.0e-15, Zero).

<!-- false. -->

muller::find_root(humps, -1.0, 2.0, 1.0e-15, Zero).

<!-- Zero = 1.29954968258. -->

newton::find_root(humps, -1.0, 2.0, 1.0e-15, Zero).

<!-- ERROR: is/2: Arithmetic: evaluation error: `float_overflow' -->

Find the roots of some functions running all methods at once using multi-threading:

function_root::find_root(f1, 1.0, 2.3, 1.0e-15, Zero, Method).

<!-- Zero = 2.0, Method = bisection. -->

function_root::find_root(f2, 1.0, 1.3, 1.0e-15, Zero, Method).

<!-- Zero = 1.25809265664599, Method = newton. -->

function_root::find_root(f3, 0.0, 3.0, 1.0e-15, Zero, Method).

<!-- Zero = 1.4142135623731, Method = newton. -->

function_root::find_root(f4, -1.0, 2.0, 1.0e-15, Zero, Method).

<!-- Zero = -8.88178419700125e-16, Method = bisection. -->

function_root::find_root(humps, -1.0, 2.0, 1.0e-15, Zero, Method).

<!-- Zero = 1.29954968258482, Method = muller. -->