- Kill a running thread from another pthread c how to#
- Kill a running thread from another pthread c code#
The focus here would be on pthread_exit(). If its calls pthread_exit() function from within itself.The function used here is pthread_cancel(). If it is canceled by some other thread.If the thread returns from its start routine.If we classify on a broader level, then we see that a thread can terminate in three ways : If we are not interested in the return value then we can set this pointer to be NULL. This function is called from within the parent thread and the first argument is the thread ID of the thread to wait on and the second argument is the return value of the thread on which we want to the parent thread to wait.
The function above makes sure that its parent thread does not terminate until it is done.
Int pthread_join(pthread_t thread, void **rval_ptr) So, if we want that the main thread should wait until all the other threads are finished then there is a function pthread_join(). So maximum lifetime of every thread executing in the program is that of the main thread. Thread TerminationĪs already discussed above that each program starts with at least one thread which is the thread in which main() function is executed. This means that the default thread in which the main() function was running got completed and hence the process terminated as main() returned. So, why does this happen? Well, this happened because just before the second thread is about to be scheduled, the parent thread (from which the two threads were created) completed its execution. So we see that the log ‘Second thread processing’ is missing in case we remove the sleep() function. threadsīut if I run it with sleep() enabled then I see the output as : $.
Kill a running thread from another pthread c code#
If I remove the sleep() function from the code above and then try to compile and run it, I see the following output : $. Printf("\n Thread created successfully\n") ĭid you observe the ‘sleep()’ function being used? Did you get a question about why sleep() is being used? Well if you did then you are at the correct place to get the answer and if you did not then also its going to be a good read ahead. Printf("\ncan't create thread :", strerror(err)) If we take the same example as discussed in part-II of this series : #includeĮrr = pthread_create(&(tid), NULL, &doSomeThing, NULL) Linux Threads Series: part 1, part 2, part 3 (this article). In this article we will mainly focus on how a thread is terminated.
Kill a running thread from another pthread c how to#
In the part-II (Thread creation and Identification) of the Linux Thread series, we discussed about thread IDs, how to compare two thread IDs and how to create a thread.