source: doc/papers/concurrency/examples/DatingServiceThread.cfa @ 2aab69b

arm-ehjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-expr
Last change on this file since 2aab69b was 2aab69b, checked in by Peter A. Buhr <pabuhr@…>, 22 months ago

files added to concurrency paper

  • Property mode set to 100644
File size: 3.1 KB
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1#include <stdlib.hfa>                                                                   // random
2#include <fstream.hfa>
3#include <kernel.hfa>
4#include <thread.hfa>
5#include <unistd.h>                                                                             // getpid
6
7enum { CompCodes = 20 };                                                                // number of compatibility codes
8
9thread DatingService {
10        condition Girls[CompCodes], Boys[CompCodes];
11        unsigned int girlPhoneNo, boyPhoneNo, ccode;
12}; // DatingService
13
14unsigned int girl( DatingService & mutex ds, unsigned int phoneno, unsigned int code ) with( ds ) {
15        girlPhoneNo = phoneno;  ccode = code;
16        wait( Girls[ccode] );                                                           // wait for boy
17        girlPhoneNo = phoneno;
18        sout | "Girl:" | girlPhoneNo | "is dating Boy at" | boyPhoneNo | "with ccode" | ccode;
19        return boyPhoneNo;
20} // DatingService girl
21
22unsigned int boy( DatingService & mutex ds, unsigned int phoneno, unsigned int code ) with( ds ) {
23        boyPhoneNo = phoneno;  ccode = code;
24        wait( Boys[ccode] );                                                            // wait for girl
25        boyPhoneNo = phoneno;
26        sout | " Boy:" | boyPhoneNo | "is dating Girl" | girlPhoneNo | "with ccode" | ccode;
27        return girlPhoneNo;
28} // DatingService boy
29
30void main( DatingService & ds ) with( ds ) {                    // thread starts
31        for () {
32                waitfor( ^?{} : ds ) {
33                        break;
34                } or waitfor( girl : ds ) {
35                        if ( ! is_empty( Boys[ccode] ) ) {                      // no compatible boy ?
36                                signal_block( Boys[ccode] );                    // restart boy to set phone number
37                                signal_block( Girls[ccode] );                   // restart girl to set phone number
38                        } // if
39                } or waitfor( boy : ds ) {
40                        if ( ! is_empty( Girls[ccode] ) ) {                     // no compatible girl ?
41                                signal_block( Girls[ccode] );                   // restart girl to set phone number
42                                signal_block( Boys[ccode] );                    // restart boy to set phone number
43                        } // if
44                }
45        }
46} // DatingService main
47
48unsigned int girlck[CompCodes];
49unsigned int boyck[CompCodes];
50
51thread Girl {
52        DatingService & TheExchange;
53        unsigned int id, ccode;
54}; // Girl
55
56void main( Girl & g ) with( g ) {
57        yield( random( 100 ) );                                                         // do not start at the same time
58        unsigned int partner = girl( TheExchange, id, ccode );
59        girlck[id] = partner;
60} // Girl main
61
62void ?{}( Girl & g, DatingService * TheExchange, unsigned int id, unsigned int ccode ) {
63        &g.TheExchange = TheExchange;
64        g.id = id;
65        g.ccode = ccode;
66} // Girl ?{}
67
68thread Boy {
69        DatingService & TheExchange;
70        unsigned int id, ccode;
71}; // Boy
72
73void main( Boy & b ) with( b ) {
74        yield( random( 100 ) );                                                         // don't all start at the same time
75        unsigned int partner = boy( TheExchange, id, ccode );
76        boyck[id] = partner;
77} // Boy main
78
79void ?{}( Boy & b, DatingService * TheExchange, unsigned int id, unsigned int ccode ) {
80        &b.TheExchange = TheExchange;
81        b.id = id;
82        b.ccode = ccode;
83} // Boy ?{}
84
85int main() {
86        DatingService TheExchange;
87        Girl * girls[CompCodes];
88        Boy  * boys[CompCodes];
89
90        srandom( /*getpid()*/ 103 );
91
92        for ( i; (unsigned int)CompCodes ) {
93                girls[i] = new( &TheExchange, i, i );                   // TheExchange constructor needs unsigned int
94                boys[i]  = new( &TheExchange, i, CompCodes - ( i + 1 ) );
95        } // for
96
97        for ( i; CompCodes ) {
98                delete( boys[i] );
99                delete( girls[i] );
100        } // for
101
102        for ( i; CompCodes ) {
103                if ( girlck[ boyck[i] ] != boyck[ girlck[i] ] ) abort();
104        } // for
105} // main
106
107// Local Variables: //
108// tab-width: 4 //
109// compile-command: "cfa DatingServiceThread.cfa" //
110// End: //
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