1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2002-2016 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. 17 18 This file is copied from schedlock.c. */ 19 20 #include <stdio.h> 21 #include <unistd.h> 22 #include <stdlib.h> 23 #include <pthread.h> 24 25 void *thread_function(void *arg); /* Pointer to function executed by each thread */ 26 27 #define NUM 5 28 29 unsigned int args[NUM+1]; 30 31 int main() { 32 int res; 33 int all_started; 34 pthread_t threads[NUM]; 35 void *thread_result; 36 long i; 37 38 for (i = 0; i < NUM; i++) 39 { 40 args[i] = 1; /* Init value. */ 41 res = pthread_create(&threads[i], 42 NULL, 43 thread_function, 44 (void *) i); 45 } 46 47 all_started = 0; 48 while (!all_started) 49 { 50 all_started = 1; 51 for (i = 0; i < NUM; i++) 52 { 53 if (args[i] == 1) 54 { 55 all_started = 0; 56 break; 57 } 58 } 59 } 60 61 args[i] = 1; 62 /* Break here */ 63 thread_function ((void *) i); 64 65 exit(EXIT_SUCCESS); 66 } 67 68 void *thread_function(void *arg) { 69 int my_number = (long) arg; 70 int *myp = (int *) &args[my_number]; 71 72 /* Don't run forever. Run just short of it :) */ 73 while (*myp > 0) 74 { 75 (*myp) ++; /* Loop increment. */ 76 } 77 78 pthread_exit(NULL); 79 } 80 81