source: src/tests/concurrent/examples/datingService.c @ 4c11fce

//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// datingService.c --
//
// Author           : Peter A. Buhr
// Created On       : Mon Oct 30 12:56:20 2017
// Last Modified By : Peter A. Buhr
// Last Modified On : Tue Jan  2 12:19:01 2018
// Update Count     : 22
//

#include <stdlib>                                                                               // random
#include <fstream>
#include <kernel>
#include <thread>
#include <unistd.h>                                                                             // getpid

enum { NoOfPairs = 20 };

monitor DatingService {
        condition Girls[NoOfPairs], Boys[NoOfPairs];
        unsigned int GirlPhoneNo, BoyPhoneNo;
}; // DatingService

unsigned int girl( DatingService & mutex ds, unsigned int PhoneNo, unsigned int ccode ) with( ds ) {
        if ( is_empty( Boys[ccode] ) ) {                                        // no compatible boy ?
                wait( Girls[ccode] );                                                   // wait for boy
                GirlPhoneNo = PhoneNo;                                                  // make phone number available
        } else {
                GirlPhoneNo = PhoneNo;                                                  // make phone number available
                signal_block( Boys[ccode] );                                    // restart boy to set phone number
        } // if
        return BoyPhoneNo;
} // DatingService girl

unsigned int boy( DatingService & mutex ds, unsigned int PhoneNo, unsigned int ccode ) with( ds ) {
        if ( is_empty( Girls[ccode] ) ) {                                       // no compatible girl ?
                wait( Boys[ccode] );                                                    // wait for girl
                BoyPhoneNo = PhoneNo;                                                   // make phone number available
        } else {
                BoyPhoneNo = PhoneNo;                                                   // make phone number available
                signal_block( Girls[ccode] );                                   // restart girl to set phone number
        } // if
        return GirlPhoneNo;
} // DatingService boy

unsigned int girlck[NoOfPairs];
unsigned int boyck[NoOfPairs];

thread Girl {
        DatingService & TheExchange;
        unsigned int id, ccode;
}; // Girl

void main( Girl & g ) with( g ) {
        yield( random( 100 ) );                                                         // don't all start at the same time
        unsigned int partner = girl( TheExchange, id, ccode );
        sout | "Girl:" | id | "is dating Boy at" | partner | "with ccode" | ccode | endl;
        girlck[id] = partner;
} // Girl main

void ?{}( Girl & g, DatingService * TheExchange, unsigned int id, unsigned int ccode ) {
        &g.TheExchange = TheExchange;
        g.id = id;
        g.ccode = ccode;
} // Girl ?{}

thread Boy {
        DatingService &TheExchange;
        unsigned int id, ccode;
}; // Boy

void main( Boy & b ) with( b ) {
        yield( random( 100 ) );                                                         // don't all start at the same time
        unsigned int partner = boy( TheExchange, id, ccode );
        sout | " Boy:" | id | "is dating Girl" | partner | "with ccode" | ccode | endl;
        boyck[id] = partner;
} // Boy main

void ?{}( Boy & b, DatingService * TheExchange, unsigned int id, unsigned int ccode ) {
        &b.TheExchange = TheExchange;
        b.id = id;
        b.ccode = ccode;
} // Boy ?{}

int main() {
        DatingService TheExchange;
        Girl *girls[NoOfPairs];
        Boy  *boys[NoOfPairs];

        srandom( /*getpid()*/ 103 );

        for ( unsigned int i = 0; i < NoOfPairs; i += 1 ) {
                girls[i] = new( &TheExchange, i, i );
                boys[i]  = new( &TheExchange, i, NoOfPairs - ( i + 1 ) );
        } // for

        for ( unsigned int i = 0; i < NoOfPairs; i += 1 ) {
                delete( boys[i] );
                delete( girls[i] );
        } // for

        for ( unsigned int i = 0; i < NoOfPairs; i += 1 ) {
                if ( girlck[ boyck[i] ] != boyck[ girlck[i] ] ) abort();
        } // for
} // main

// Local Variables: //
// tab-width: 4 //
// compile-command: "cfa datingService.c" //
// End: //