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Re: C++ cleanup handler execution
Kevin D. Clark writes:
> Sorry, in my previous email my test file got garbled.
> My fault.
Sorry, now I've made *three* mistakes. I've been up for too long...
*This* is the correct version of my test file. The previous versions
that I sent were faulty.
Sorry.
--kevin (time to take a nap!)
// Compiling this file as a C++ program versus being a C program doesn't
// seem to affect the fact that the cleanup handler doesn't seem to be called.
#ifdef __unix
#include <unistd.h>
#endif
#include <pthread.h>
#include "stdio.h"
static void *canceledRoutine(void *), *anotherRoutine(void *);
static volatile int counter = 0;
static pthread_t canceledThread, anotherThread;
int
main(int argc, char *argv[])
{
int i = 0;
pthread_attr_t tattr;
pthread_attr_init(&tattr);
pthread_attr_setdetachstate(&tattr, PTHREAD_CREATE_DETACHED);
for (i=0; i<1000; i++) {
fprintf(stderr, "iteration %d\n", i);
pthread_create(&canceledThread, &tattr, canceledRoutine, (void *)i);
pthread_create(&anotherThread, 0, anotherRoutine, (void *)i);
pthread_join(anotherThread, 0);
fprintf(stderr, "counter is %d\n", counter);
}
// kludge
#ifdef __unix
sleep(5);
#else
Sleep(5000);
#endif
return 0;
}
static void cancelCleanup(void *arg)
{
int i = (int)arg;
counter++;
fprintf(stderr, "%d -- Hey, I've been canceled!\n", i);
}
static void *
canceledRoutine(void *arg)
{
int i = (int)arg;
pthread_cleanup_push(cancelCleanup, (void *)i);
while(1) {
#ifdef __unix
// sleep() is defined to be a cancelation point
sleep(1);
#else
// I'm not totally sure what is defined to be a cancelation point here.
// This probably needs to be documented.
Sleep(1000);
#endif
}
pthread_cleanup_pop(0);
return 0;
}
static void *
anotherRoutine(void *arg)
{
int i = (int)arg;
pthread_cancel(canceledThread);
return 0;
}