1 /* 2 simple_lock_test.c 3 4 Initializes two contexts in two different threads and tries to get read locks on both at the same time. 5 Hangs at line 24. 6 */ 7 #include <stdio.h> 8 #include <stdarg.h> 9 10 #include "test_ccapi_log.h" 11 12 #if defined(macintosh) || (defined(__MACH__) && defined(__APPLE__)) 13 #include <TargetConditionals.h> 14 #endif 15 16 #ifdef TARGET_OS_MAC 17 #include <stdlib.h> 18 #include <pthread.h> 19 #include <Kerberos/CredentialsCache.h> 20 #else 21 #include "CredentialsCache.h" 22 #endif 23 24 25 void *other_thread (void) { 26 cc_int32 err; 27 cc_context_t context = NULL; 28 29 err = cc_initialize(&context, ccapi_version_7, NULL, NULL); 30 31 log_error("thread: attempting lock. may hang. err == %d", err); 32 33 if (!err) { 34 // hangs with cc_lock_read which should succeed immediately, but does not hang with write, upgrade, and downgrade, which fail immediately 35 err = cc_context_lock(context, cc_lock_read, cc_lock_noblock); 36 } 37 38 if (context) { 39 cc_context_unlock(context); 40 cc_context_release(context); 41 context = NULL; 42 } 43 log_error("thread: return. err == %d", err); 44 } 45 46 47 int main (int argc, char *argv[]) { 48 cc_int32 err; 49 int status; 50 cc_context_t context = NULL; 51 52 #ifdef TARGET_OS_MAC 53 pthread_t thread_id; 54 #endif 55 56 err = cc_initialize(&context, ccapi_version_7, NULL, NULL); 57 if (!err) { 58 err = cc_context_lock(context, cc_lock_read, cc_lock_noblock); 59 } 60 61 log_error("main: initialized and read locked context. err == %d", err); 62 63 #ifdef TARGET_OS_MAC 64 status = pthread_create (&thread_id, NULL, (void *) other_thread, NULL); 65 if (status != 0) { 66 log_error("pthread_create() returned %d", status); 67 exit(-1); 68 } 69 70 pthread_join(thread_id, NULL); 71 #else 72 73 #endif 74 75 log_error("main: unlocking and releasing context. err == %d", err); 76 77 if (context) { 78 log_error("main: calling cc_context_unlock"); 79 cc_context_unlock(context); 80 log_error("main: calling cc_context_release"); 81 cc_context_release(context); 82 context = NULL; 83 } 84 85 log_error("main: return. err == %d", err); 86 87 #if defined(_WIN32) 88 UNREFERENCED_PARAMETER(status); // no whining! 89 #endif 90 return 0; 91 } 92