Last change
on this file since 5 was 2, checked in by Mattia Monga, 14 years ago |
Importazione sorgenti
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File size:
1.2 KB
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Rev | Line | |
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[2] | 1 | /* Copyright (C) 2009 by Mattia Monga <mattia.monga@unimi.it> */
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| 2 | /* $Id$ */
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| 3 |
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| 4 | #include <unistd.h>
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| 5 | #include <stdio.h>
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| 6 | #include <stdlib.h>
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| 7 | #include <signal.h>
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| 8 | #include <sched.h>
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| 9 | #include <assert.h>
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| 10 |
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| 11 | int run(void* s)
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| 12 | {
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| 13 | int* shared = (int*)s; /* alias per comodita` */
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| 14 | while (shared[0] < 10) {
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| 15 | sleep(1);
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| 16 | printf("Processo figlio (%d). s = %d\n",
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| 17 | getpid(), shared[0]);
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| 18 | if (!(shared[0] < 10)){
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| 19 | printf("Corsa critica!!!!\n");
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| 20 | abort();
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| 21 | }
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| 22 | shared[0] += 1;
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| 23 | }
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| 24 | return 0;
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| 25 | }
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| 26 |
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| 27 |
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| 28 | int main(void){
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| 29 |
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| 30 | int shared[2] = {0 , 0};
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| 31 | if (clone(run, malloc(4096)+4096, SIGCHLD, shared) < 0){
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| 32 | perror("Errore nella creazione");
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| 33 | exit(1);
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| 34 | }
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| 35 |
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| 36 | if (clone(run, malloc(4096)+4096, SIGCHLD, shared) < 0){
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| 37 | perror("Errore nella creazione");
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| 38 | exit(1);
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| 39 | }
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| 40 |
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| 41 | while(1) {
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| 42 | sleep(1);
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| 43 | printf("Processo padre. s = %d\n", shared[0]);
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| 44 | }
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| 45 | return 0;
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| 46 | }
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| 47 |
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| 48 |
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| 49 |
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| 50 |
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| 51 |
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| 52 |
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| 53 |
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| 54 | /* Local Variables: */
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| 55 | /* compile-command: "make -k " */
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| 56 | /* End: */
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