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#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
}
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