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// check if write locks are fair
#include <stdio.h>
#include <toku_assert.h>
#include <unistd.h>
#include <pthread.h>
#include <util/frwlock.h>
toku_mutex_t rwlock_mutex;
toku::frwlock rwlock;
volatile int killed = 0;
static void *t1_func(void *arg) {
int i;
for (i = 0; !killed; i++) {
toku_mutex_lock(&rwlock_mutex);
rwlock.write_lock(false);
toku_mutex_unlock(&rwlock_mutex);
usleep(10000);
toku_mutex_lock(&rwlock_mutex);
rwlock.write_unlock();
toku_mutex_unlock(&rwlock_mutex);
}
printf("%lu %d\n", (unsigned long) pthread_self(), i);
return arg;
}
int main(void) {
int r;
toku_mutex_init(&rwlock_mutex, NULL);
rwlock.init(&rwlock_mutex);
const int nthreads = 2;
pthread_t tids[nthreads];
for (int i = 0; i < nthreads; i++) {
r = pthread_create(&tids[i], NULL, t1_func, NULL);
assert(r == 0);
}
sleep(10);
killed = 1;
for (int i = 0; i < nthreads; i++) {
void *ret;
r = pthread_join(tids[i], &ret);
assert(r == 0);
}
rwlock.deinit();
toku_mutex_destroy(&rwlock_mutex);
return 0;
}
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