I've noticed some unexpected behaviour with winpthreads which I believe
is a bug. Thread-cancellation cleanup handlers are not called when a
thread terminates due to a call to pthread_exit(). This is unexpected;
the pthread_cleanup_push(), pthread_cleanup_pop() specification [1]
mentions:
The cancellation cleanup handler shall be popped from the
cancellation cleanup stack
and invoked with the argument arg when:
The thread exits (that is, calls pthread_exit()).
An example program illustrating winpthreads failing to invoke cleanup
handlers follows:
#include <pthread.h>
#include <stdio.h>
void* cleanup_func(void *arg)
{
printf("cleanup_func()\n");
}
void* func(void *arg)
{
printf("func()\n");
pthread_cleanup_push(cleanup_func, 0);
pthread_exit(NULL);
pthread_cleanup_pop(1);
}
int main()
{
pthread_t t;
void *ret;
pthread_create(&t, NULL, func, (void*)NULL);
pthread_join(t, &ret);
return 0;
}
Thanks
Keri
[1]
http://pubs.opengroup.org/onlinepubs/000095399/functions/pthread_cleanup_pop.html
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