1 /* 2 * Copyright (c) 2002, Intel Corporation. All rights reserved. 3 * Created by: rolla.n.selbak REMOVE-THIS AT intel DOT com 4 * This file is licensed under the GPL license. For the full content 5 * of this license, see the COPYING file at the top level of this 6 * source tree. 7 8 * Test pthread_cancelstate 9 * Atomically sets the cancelability state to 'state' and returns the old 10 * cancelability state in the location referenced by 'oldstate'. 11 * 'state' can either be PTHREAD_CANCEL_ENABLE, or PTHREAD_CANCEL_DISABLE. 12 * 13 * Test when a thread is PTHREAD_CANCEL_DISABLE 14 * 15 * STEPS: 16 * 1. Create a thread. 17 * 2. In the thread function, set the state to 18 * PTHREAD_CANCEL_DISABLE and the cancel_flag to -1. 19 * 3. Send out a thread cancel request to the new thread 20 * 4. If the cancel request was honored, the cancel_flag will remain -1. 21 * 5. If not, the thread will continue until the end of execution, cancel_flag will be set to 1 22 * and,therefore passing the test. 23 */ 24 25 #include <pthread.h> 26 #include <stdio.h> 27 #include <errno.h> 28 #include <unistd.h> 29 #include "posixtest.h" 30 31 #define INTHREAD 0 /* Control going to or is already for Thread */ 32 #define INMAIN 1 /* Control going to or is already for Main */ 33 34 int sem1; /* Manual semaphore */ 35 int cancel_flag; 36 37 /* Function that the thread executes upon its creation */ 38 void *a_thread_func() 39 { 40 /* Set cancel state to DISABLE, meaning it shouldn't honor any cancel requests. */ 41 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL); 42 43 cancel_flag = -1; 44 45 /* Indicate to main() that the thread has been created. */ 46 sem1 = INMAIN; 47 48 /* Wait until main() has sent out a cancel request, meaning until it 49 * sets sem1==INTHREAD. */ 50 while (sem1 == INMAIN) 51 sleep(1); 52 53 /* If the thread incorrectly honors the cancel request, then the cancel_flag will 54 * remain -1. If it contiues on with the thread execution, then the cancel_flag 55 * will be 1, and therefore passing this test. */ 56 pthread_testcancel(); 57 58 /* Should reach here if the thread correctly ignores the cancel 59 * request. */ 60 cancel_flag = 1; 61 pthread_exit(0); 62 return NULL; 63 } 64 65 int main(void) 66 { 67 pthread_t new_th; 68 69 /* Initializing values */ 70 sem1 = INTHREAD; 71 cancel_flag = 0; 72 73 /* Create a new thread. */ 74 if (pthread_create(&new_th, NULL, a_thread_func, NULL) != 0) { 75 perror("Error creating thread\n"); 76 return PTS_UNRESOLVED; 77 } 78 79 /* Make sure thread is created before we cancel it. (wait for 80 * a_thread_func() to set sem1=INMAIN.) */ 81 while (sem1 == INTHREAD) 82 sleep(1); 83 84 if (pthread_cancel(new_th) != 0) { 85 perror("Error sending cancel request\n"); 86 return PTS_UNRESOLVED; 87 } 88 89 /* Indicate to the thread function that the thread cancel request 90 * has been sent to it. */ 91 sem1 = INTHREAD; 92 93 /* Wait for thread to end execution. */ 94 if (pthread_join(new_th, NULL) != 0) { 95 perror("Error in pthread_join()\n"); 96 return PTS_UNRESOLVED; 97 } 98 99 /* This means that the cancel request was honored rather than ignored, and 100 * the test fails. */ 101 if (cancel_flag <= 0) { 102 printf("Test FAILED\n"); 103 return PTS_FAIL; 104 } 105 106 printf("Test PASSED\n"); 107 return PTS_PASS; 108 } 109
