bart | 032424f | 2008-09-27 12:26:17 +0000 | [diff] [blame] | 1 | /** Cancel a thread that holds a lock on a mutex. */ |
| 2 | |
| 3 | |
| 4 | #include <assert.h> |
| 5 | #include <pthread.h> |
| 6 | #include <stdio.h> |
| 7 | |
| 8 | |
| 9 | pthread_cond_t s_cond; |
| 10 | pthread_mutex_t s_mutex1; |
| 11 | pthread_mutex_t s_mutex2; |
| 12 | |
| 13 | |
| 14 | static void* thread(void* arg) |
| 15 | { |
| 16 | /* Lock s_mutex2. */ |
| 17 | pthread_mutex_lock(&s_mutex2); |
| 18 | /* Inform the main thread that s_mutex2 has been locked, and wait for pthread_cancel(). */ |
| 19 | pthread_mutex_lock(&s_mutex1); |
| 20 | pthread_cond_signal(&s_cond); |
| 21 | pthread_cond_wait(&s_cond, &s_mutex1); |
| 22 | return 0; |
| 23 | } |
| 24 | |
| 25 | int main(int argc, char** argv) |
| 26 | { |
| 27 | pthread_t tid; |
| 28 | |
| 29 | /* Initialize synchronization objects. */ |
| 30 | pthread_cond_init(&s_cond, 0); |
| 31 | pthread_mutex_init(&s_mutex1, 0); |
| 32 | pthread_mutex_init(&s_mutex2, 0); |
| 33 | |
| 34 | /* Create thread. */ |
| 35 | pthread_mutex_lock(&s_mutex1); |
| 36 | pthread_create(&tid, 0, &thread, 0); |
| 37 | |
| 38 | /* Wait until the created thread has locked s_mutex2. */ |
| 39 | pthread_cond_wait(&s_cond, &s_mutex1); |
| 40 | pthread_mutex_unlock(&s_mutex1); |
| 41 | |
| 42 | /* Cancel the created thread. */ |
| 43 | pthread_cancel(tid); |
| 44 | |
| 45 | /* Join the created thread. */ |
| 46 | pthread_join(tid, 0); |
| 47 | |
bart | 91d2fe2 | 2012-08-28 18:17:27 +0000 | [diff] [blame] | 48 | /* Invoke pthread_cancel() with an invalid thread ID. */ |
| 49 | pthread_cancel(tid); |
| 50 | |
bart | 032424f | 2008-09-27 12:26:17 +0000 | [diff] [blame] | 51 | fprintf(stderr, "Test finished.\n"); |
| 52 | |
| 53 | return 0; |
| 54 | } |