1 /* $OpenBSD: pthread_join.c,v 1.4 2004/02/28 08:06:47 deraadt Exp $ */ 2 /* 3 * Copyright (c) 1993, 1994, 1995, 1996 by Chris Provenzano and contributors, 4 * proven@mit.edu All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Chris Provenzano, 17 * the University of California, Berkeley, and contributors. 18 * 4. Neither the name of Chris Provenzano, the University, nor the names of 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL CHRIS PROVENZANO, THE REGENTS OR 26 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 27 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 /* ==== test_pthread_join.c ================================================= 36 * Copyright (c) 1993 by Chris Provenzano, proven@athena.mit.edu 37 * 38 * Description : Test pthread_join(). Run this after test_create() 39 * 40 * 1.23 94/05/04 proven 41 * -Started coding this file. 42 */ 43 44 #include <pthread.h> 45 #include <unistd.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include "test.h" 49 50 /* This thread yields so the creator has a live thread to wait on */ 51 static void * 52 new_thread_1(void * new_buf) 53 { 54 int i; 55 56 snprintf((char *)new_buf, 512, "New thread %%d stack at %p\n", &i); 57 pthread_yield(); /* (ensure parent can wait on live thread) */ 58 sleep(1); 59 return(new_buf); 60 PANIC("return"); 61 } 62 63 /* This thread doesn't yield so the creator has a dead thread to wait on */ 64 static void * 65 new_thread_2(void * new_buf) 66 { 67 int i; 68 69 snprintf((char *)new_buf, 512, "New thread %%d stack at %p\n", &i); 70 return(new_buf); 71 PANIC("return"); 72 } 73 74 int 75 main(int argc, char *argv[]) 76 { 77 char buf[256], *status; 78 pthread_t thread; 79 int debug = 1; 80 int i = 0; 81 82 if (debug) 83 printf("Original thread stack at %p\n", &i); 84 85 CHECKr(pthread_create(&thread, NULL, new_thread_1, (void *)buf)); 86 CHECKr(pthread_join(thread, (void **)(&status))); 87 if (debug) 88 printf(status, ++i); 89 90 /* Now have the created thread finishing before the join. */ 91 CHECKr(pthread_create(&thread, NULL, new_thread_2, (void *)buf)); 92 pthread_yield(); 93 sleep(1); /* (ensure thread is dead) */ 94 CHECKr(pthread_join(thread, (void **)(&status))); 95 96 if (debug) 97 printf(status, ++i); 98 99 SUCCEED; 100 } 101 102