| #include <pthread.h> |
| #include <mach/thread_act.h> |
| #include <unistd.h> |
| |
| pthread_mutex_t suspend_mutex = PTHREAD_MUTEX_INITIALIZER; |
| pthread_mutex_t signal_mutex = PTHREAD_MUTEX_INITIALIZER; |
| pthread_cond_t signal_cond = PTHREAD_COND_INITIALIZER; |
| |
| int g_running_count = 0; |
| |
| int |
| function_to_call() { |
| return g_running_count; |
| } |
| |
| void * |
| suspend_func (void *unused) { |
| pthread_setname_np("Look for me"); |
| pthread_cond_signal(&signal_cond); |
| pthread_mutex_lock(&suspend_mutex); |
| |
| return NULL; // We allowed the suspend thread to run |
| } |
| |
| void * |
| running_func (void *input) { |
| while (g_running_count < 10) { |
| usleep (100); |
| g_running_count++; // Break here to show we can handle breakpoints |
| } |
| return NULL; |
| } |
| |
| int |
| main() |
| { |
| pthread_t suspend_thread; // Stop here to get things going |
| |
| pthread_mutex_lock(&suspend_mutex); |
| pthread_mutex_lock(&signal_mutex); |
| pthread_create(&suspend_thread, NULL, suspend_func, NULL); |
| |
| pthread_cond_wait(&signal_cond, &signal_mutex); |
| |
| mach_port_t th_port = pthread_mach_thread_np(suspend_thread); |
| thread_suspend(th_port); |
| |
| pthread_mutex_unlock(&suspend_mutex); |
| |
| pthread_t running_thread; |
| pthread_create(&running_thread, NULL, running_func, NULL); |
| |
| pthread_join(running_thread, NULL); |
| thread_resume(th_port); // Break here after thread_join |
| |
| pthread_join(suspend_thread, NULL); |
| return 0; // Break here to make sure the thread exited normally |
| } |