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/* $OpenBSD: pthread_atfork.c,v 1.3 2005/11/05 04:28:46 fgsch Exp $ */
/*
* Federico Schwindt <fgsch@openbsd.org>, 2005. Public Domain.
*/
#include <sys/types.h>
#include <pthread.h>
#include <unistd.h>
#include "test.h"
int cnt;
void
prepare1(void)
{
ASSERT(cnt == 1);
cnt--;
}
void
prepare2(void)
{
ASSERT(cnt == 2);
cnt--;
}
void
parent1(void)
{
ASSERT(cnt == 0);
cnt += 2;
}
void
parent2(void)
{
ASSERT(cnt == 2);
cnt -= 2;
}
void
child1(void)
{
ASSERT(cnt == 0);
cnt += 3;
}
void
child2(void)
{
ASSERT(cnt == 3);
cnt++;
}
void *
forker1(void *arg)
{
CHECKr(pthread_atfork(prepare1, parent1, child1));
cnt = 1;
switch (fork()) {
case -1:
PANIC("fork");
break;
case 0:
ASSERT(cnt == 3);
_exit(0);
default:
ASSERT(cnt == 2);
break;
}
cnt = 1;
return (NULL);
}
void *
forker2(void *arg)
{
CHECKr(pthread_atfork(prepare2, parent2, child2));
cnt = 2;
switch (fork()) {
case -1:
PANIC("fork");
break;
case 0:
ASSERT(cnt == 4);
_exit(0);
default:
ASSERT(cnt == 0);
break;
}
cnt = 0;
return (NULL);
}
int
main(int argc, char **argv)
{
pthread_t tid;
CHECKr(pthread_create(&tid, NULL, forker1, NULL));
CHECKr(pthread_join(tid, NULL));
ASSERT(cnt == 1);
CHECKr(pthread_create(&tid, NULL, forker2, NULL));
CHECKr(pthread_join(tid, NULL));
ASSERT(cnt == 0);
SUCCEED;
}
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