1/* 2 * sema_tests.c 3 * xnu_quick_test 4 * 5 * Created by Jerry Cottingham on 6/2/2005. 6 * Copyright 2005 Apple Computer Inc. All rights reserved. 7 * 8 */ 9 10#include "tests.h" 11#include <sys/sem.h> 12#include <semaphore.h> 13 14/* ************************************************************************************************************** 15 * Test semctl, semget, semop system calls. 16 * ************************************************************************************************************** 17 */ 18int sema_tests( void * the_argp ) 19{ 20#if !TARGET_OS_EMBEDDED 21 int my_err, i; 22 int my_sem_id = -1; 23 union semun my_sem_union; 24 struct sembuf my_sembuf; 25 26 srand( (unsigned int)getpid() ); 27 my_sem_id = semget( (key_t)1234, 1, (0666 | IPC_CREAT) ); 28 if ( my_sem_id == -1 ) { 29 printf( "semget failed with error %d - \"%s\" \n", errno, strerror( errno) ); 30 goto test_failed_exit; 31 } 32 33 my_sem_union.val = 1; 34 my_err = semctl( my_sem_id, 0, SETVAL, my_sem_union ); 35 if ( my_sem_id == -1 ) { 36 printf( "semget failed with error %d - \"%s\" \n", errno, strerror( errno) ); 37 goto test_failed_exit; 38 } 39 40 /* verify semop failure for bad nsop values */ 41 my_err = semop( my_sem_id, &my_sembuf, 10000); 42 if (my_err != -1 || errno != E2BIG) { 43 printf( "semop did not fail with E2BIG - instead %d - \"%s\" \n", errno, strerror( errno) ); 44 goto test_failed_exit; 45 46 } 47 48 for ( i = 0; i < 10000; i++ ) { 49 my_sembuf.sem_num = 0; 50 my_sembuf.sem_op = -1; 51 my_sembuf.sem_flg = SEM_UNDO; 52 53 my_err = semop( my_sem_id, &my_sembuf, 1 ); 54 if ( my_err == -1 ) { 55 printf( "semop failed with error %d - \"%s\" \n", errno, strerror( errno) ); 56 goto test_failed_exit; 57 } 58 59 my_err = semctl( my_sem_id, 0, GETVAL, 0 ); 60 if ( my_err == -1 ) { 61 printf( "semctl failed with error %d - \"%s\" \n", errno, strerror( errno) ); 62 goto test_failed_exit; 63 } 64 if ( my_err != 0 ) { 65 printf( "semctl(getval) returned %d. it should be 0 (locked) here \n", my_err ); 66 goto test_failed_exit; 67 } 68 69 my_sembuf.sem_num = 0; 70 my_sembuf.sem_op = 1; 71 my_sembuf.sem_flg = SEM_UNDO; 72 73 my_err = semop( my_sem_id, &my_sembuf, 1 ); 74 if ( my_err == -1 ) { 75 printf( "semop failed with error %d - \"%s\" \n", errno, strerror( errno) ); 76 goto test_failed_exit; 77 } 78 } 79 80 my_err = semctl( my_sem_id, 0, IPC_RMID, my_sem_union ); 81 if ( my_err == -1 ) { 82 printf( "semctl (IPC_RMID) failed with error %d - \"%s\" \n", errno, strerror( errno) ); 83 goto test_failed_exit; 84 } 85 my_sem_id = -1; 86 my_err = 0; 87 goto test_passed_exit; 88 89test_failed_exit: 90 my_err = -1; 91 92test_passed_exit: 93 if ( my_sem_id != -1 ) { 94 semctl( my_sem_id, 0, IPC_RMID, my_sem_union ); 95 } 96 return( my_err ); 97#else 98 printf( "\t--> Not supported on EMBEDDED TARGET\n" ); 99 return 0; 100#endif 101} 102 103 104/* ************************************************************************************************************** 105 * Test sem_close, sem_open, sem_post, sem_trywait, sem_unlink, sem_wait system calls. 106 * ************************************************************************************************************** 107 */ 108int sema2_tests( void * the_argp ) 109{ 110 int my_err; 111 sem_t * my_sem_t = (sem_t *)SEM_FAILED; 112 char my_sema_name[ 64 ]; 113 114 /* get a semaphore (initialized as locked) */ 115 sprintf( &my_sema_name[0], "sema_testing_%d", getpid( ) ); 116 my_sem_t = sem_open( &my_sema_name[0], (O_CREAT | O_EXCL), (S_IRUSR | S_IWUSR), 0 ); 117 if ( my_sem_t == (sem_t*)SEM_FAILED ) { 118 printf( "sem_open failed with error %d - \"%s\" \n", errno, strerror( errno) ); 119 goto test_failed_exit; 120 } 121 122 /* get the lock - should return EAGAIN (EWOULDBLOCK) */ 123 my_err = sem_trywait( my_sem_t ); 124 if ( my_err == -1 ) { 125 my_err = errno; 126 if ( my_err != EAGAIN ) { 127 printf( "sem_trywait failed with error %d - \"%s\" \n", my_err, strerror( my_err) ); 128 goto test_failed_exit; 129 } 130 } 131 132 /* unlock our semaphore */ 133 my_err = sem_post( my_sem_t ); 134 if ( my_err == -1 ) { 135 printf( "sem_post failed with error %d - \"%s\" \n", errno, strerror( errno) ); 136 goto test_failed_exit; 137 } 138 139 /* get the lock again */ 140 my_err = sem_wait( my_sem_t ); 141 if ( my_err == -1 ) { 142 printf( "sem_wait failed with error %d - \"%s\" \n", errno, strerror( errno) ); 143 goto test_failed_exit; 144 } 145 146 my_err = sem_unlink( &my_sema_name[0] ); 147 if ( my_err == -1 ) { 148 printf( "sem_unlink failed with error %d - \"%s\" \n", errno, strerror( errno) ); 149 goto test_failed_exit; 150 } 151 152 my_err = sem_close( my_sem_t ); 153 if ( my_err == -1 ) { 154 printf( "sem_close failed with error %d - \"%s\" \n", errno, strerror( errno) ); 155 goto test_failed_exit; 156 } 157 my_sem_t = (sem_t *)SEM_FAILED; 158 159 my_err = 0; 160 goto test_passed_exit; 161 162test_failed_exit: 163 my_err = -1; 164 165test_passed_exit: 166 if ( my_sem_t != (sem_t *)SEM_FAILED ) { 167 sem_close( my_sem_t ); 168 } 169 return( my_err ); 170} 171