1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 #include <pthread.h> 29 #include <stdio.h> 30 #include <unistd.h> 31 32 static void* 33 thread1_func(void* arg) 34 { 35 usleep( 2000*1000 ); 36 printf("thread 1 exited\n"); 37 return (void*) 0x8badf00d; 38 } 39 40 static void* 41 thread2_func(void* arg) 42 { 43 pthread_t t1 = (pthread_t)arg; 44 void* result; 45 46 pthread_join(t1, &result); 47 printf("thread2 received code %08x from thread1\n", (int)result); 48 return NULL; 49 } 50 51 52 static void* 53 thread3_func(void* arg) 54 { 55 pthread_t t1 = (pthread_t)arg; 56 void* result; 57 58 pthread_join(t1, &result); 59 printf("thread3 received code %08x from thread1\n", (int)result); 60 return NULL; 61 } 62 63 int main( void ) 64 { 65 pthread_t t1, t2, t3; 66 67 pthread_create( &t1, NULL, thread1_func, NULL ); 68 pthread_create( &t2, NULL, thread2_func, (void*)t1 ); 69 pthread_create( &t3, NULL, thread3_func, (void*)t1 ); 70 71 pthread_join(t2, NULL); 72 pthread_join(t3, NULL); 73 74 printf("OK\n"); 75 return 0; 76 } 77
