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This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. In real life this would be complicated by the fact that cancellationĬould occur before the mutex was grabbed.Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about products and services that can be purchased through this site. Would have a cancellation handler to release the mutex. True whatever the type of cancellation is. My guess is (since the stack traces are the same) that this hold
Nal that may be directed concurrently at the condition vari-Īble if there are other threads blocked on the condition Pthread_cond_timedwait() does not consume any condition sig. Mutex is re-acquired before calling the first cancellationĪ thread that has been unblocked because it has been can-Ĭeled while blocked in a call to pthread_cond_wait() or Set to PTHREAD_CANCEL_DEFERRED, a side effect of acting uponĪ cancellation request while in a condition wait is that the When the cancelability enable state of a thread is Maybe the cancelled thread should unlock by itself if it has a lock.Ī condition wait (whether timed or not) is a cancellation Add pthread_mutex_unlock() before pthread_join():
Join and cancel pthread c code#
I tested the code on both Sparc/solaris10 and linux and both platforms have the same issue. Threads 2, 3, 4 all were being blocked on pthread_cond_wait() before being cancelled, and pthread_cond_wait() is a cancellation point. I am wondering why pthread_cancel() can successfully cancel the thread with thread id 2, but it can not cancel the threads with thread id 3 and 4. Main thread is blocked by pthread_join() for the thread with thread id 3. Printf("join = %d\n", pthread_join(tid, NULL)) Printf("cancel = %d\n", pthread_cancel(tid))
Pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL) Pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER Pthread_cond_t cond = PTHREAD_COND_INITIALIZER
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