Closing Channels in Scilab

// In this example we'll use a `jobs` channel to
// communicate work to be done from the `main()` function
// to a worker function. When we have no more jobs for
// the worker we'll close the `jobs` channel.

function main()
    jobs = list();
    done = %f;

    // Here's the worker function. It repeatedly receives
    // from `jobs`. We use a while loop to check if there
    // are more jobs. We use this to notify on `done` when 
    // we've worked all our jobs.
    function worker()
        while ~isempty(jobs)
            j = jobs(1);
            jobs(1) = null();
            disp("received job " + string(j));
        end
        disp("received all jobs");
        done = %t;
    end

    // This sends 3 jobs to the worker over the `jobs`
    // list, then empties it.
    for j = 1:3
        jobs($+1) = j;
        disp("sent job " + string(j));
    end
    disp("sent all jobs");

    // We call the worker function
    worker();

    // We wait for the worker to finish
    while ~done
        sleep(100);
    end

    // Checking if there are more jobs
    if isempty(jobs) then
        disp("received more jobs: false");
    else
        disp("received more jobs: true");
    end
endfunction

main();

This Scilab code attempts to replicate the functionality of the original example. Here are some key differences and explanations:

Scilab doesn’t have built-in support for channels or goroutines. Instead, we use a list (jobs) to simulate a channel and a regular function (worker) instead of a goroutine.
The close operation on a channel is simulated by emptying the jobs list.
The concept of receiving from a closed channel is simulated by checking if the jobs list is empty.
Instead of using a separate goroutine, we call the worker function directly in the main function.
We use a boolean variable done to indicate when all jobs have been processed.
The synchronization is simulated using a simple while loop with a sleep function.

To run this program, save it as a .sce file (e.g., closing_channels.sce) and execute it in Scilab. The output should be similar to the original, showing jobs being sent and received, and finally indicating that all jobs have been processed.

This example demonstrates how to simulate channel-like behavior and job processing in Scilab, even though it doesn’t have native support for these concepts.

Non Blocking Channel Operations in Scilab

Range Over Channels in Scilab

Learn X By Example

Title here

Closing Channels in Scilab