Subj : Re: I write a multithread program with pthread, and meet a program
To   : comp.programming.threads
From : icoming
Date : Mon Apr 11 2005 12:48 am

Yes. If commenting the point 1 as you said:
pthread_mutex_unlock(&mutex);
// cout<<"------------thread start"<<endl; // comment this line out!
while(true){
It can work well.
But I do not know why it works well after I comment the line.
You said it should have a predicate associated to the condition
variable.
But the reason that I use a condition variable here is that I want to
the new thread runs before the main thread call pthread_cancel() to
stop it.
If I do not use a condition variable, it is possible that the main
thread start the new thread and call pthread_cancel() to stop it before
the new thread start to run.

.