source: tests/concurrency/examples/matrixSum.cfa @ 4ff7ea3

//
// Cforall Version 1.0.0 Copyright (C) 2017 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// matrixSum.cfa --
//
// Author           : Peter A. Buhr
// Created On       : Mon Oct  9 08:29:28 2017
// Last Modified By : Peter A. Buhr
// Last Modified On : Fri Sep  8 19:05:34 2023
// Update Count     : 19
//

#include <fstream.hfa>
#include <thread.hfa>

thread Adder {
        int * row, cols, & subtotal;                                            // communication
};

void ?{}( Adder & adder, int row[], int cols, int & subtotal ) {
        adder.[ row, cols ] = [ row, cols ];                            // expression disallowed in multi-member access
        &adder.subtotal = &subtotal;
}

void main( Adder & adder ) with( adder ) {                              // thread starts here
        subtotal = 0;
        for ( c; cols ) {
                subtotal += row[c];
        } // for
}

int main() {
        const int rows = 10, cols = 1000;
        int matrix[rows][cols], subtotals[rows], total = 0;
        processor p;                                                                            // add kernel thread

        for ( r; rows ) {                                                                       // initialize
                for ( c; cols ) {
                        matrix[r][c] = 1;
                } // for
        } // for

        Adder * adders[rows];
        for ( r; rows ) {                                                                       // start threads to sum rows
                adders[r] = &(*malloc()){ matrix[r], cols, subtotals[r] };
                // adders[r] = new( matrix[r], cols, subtotals[r] );
        } // for

        for ( r; rows ) {                                                                       // wait for threads to finish
                delete( adders[r] );
                total += subtotals[r];                                                  // total subtotals
        } // for
        sout | total;
}

// Local Variables: //
// compile-command: "cfa matrixSum.cfa" //
// End: //