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rwlock-22244050.c
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rwlock-22244050.c
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#include <pthread.h>
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <libkern/OSAtomic.h>
pthread_t thr;
pthread_rwlock_t lock;
OSSpinLock slock = 0;
int i = 0;
void sighandler(int sig)
{
if (sig == SIGUSR1) {
OSSpinLockLock(&slock);
OSSpinLockUnlock(&slock);
} else {
// ALARM
fprintf(stderr, "FAIL (%d)\n", i);
exit(1);
}
}
void* thread(void *arg)
{
pthread_rwlock_rdlock(&lock);
pthread_rwlock_unlock(&lock);
return NULL;
}
int main(int argc, const char *argv[])
{
pthread_rwlock_init(&lock, NULL);
signal(SIGUSR1, sighandler);
signal(SIGALRM, sighandler);
alarm(30);
while (i++ < 10000) {
pthread_rwlock_wrlock(&lock);
pthread_create(&thr, NULL, thread, NULL);
OSSpinLockLock(&slock);
pthread_kill(thr, SIGUSR1);
pthread_rwlock_unlock(&lock);
OSSpinLockUnlock(&slock);
}
fprintf(stderr, "PASS\n");
return 0;
}