/* Removes the given KEY from this server's store. Returns
* 0 if successful, else a negative error code. */
int tpcfollower_del(tpcfollower_t *server, char *key) {
int ret;
if ((ret = tpcfollower_del_check(server, key)) < 0)
return ret;
ret = kvstore_del(&server->store, key);
return ret;
}
int kvstore_del_hash_conflicts(void) {
/* hash("abD") == hash("aae") == hash("ac#") */
char *retval = NULL, *key1 = "abD", *key2 = "aae", *key3 = "ac#";
int ret;
ret = kvstore_put(&teststore, key1, "value1");
ret += kvstore_put(&teststore, key2, "value2");
ret += kvstore_put(&teststore, key3, "value3");
ret += kvstore_del(&teststore, key2);
ASSERT_EQUAL(ret, 0);
ret = kvstore_get(&teststore, key2, &retval);
ASSERT_PTR_NULL(retval);
ASSERT_EQUAL(ret, ERRNOKEY);
ret = kvstore_get(&teststore, key1, &retval);
ASSERT_STRING_EQUAL(retval, "value1");
free(retval);
ret += kvstore_get(&teststore, key3, &retval);
ASSERT_STRING_EQUAL(retval, "value3");
free(retval);
ASSERT_EQUAL(ret, 0);
/* Clean store and do operations again with a different insertion order to
* help ensure that success wasn't due to a lucky ordering. */
kvstore_clean(&teststore);
kvstore_init(&teststore, KVSTORE_DIRNAME);
ret = kvstore_put(&teststore, key2, "value2");
ret += kvstore_put(&teststore, key1, "value1");
ret += kvstore_put(&teststore, key3, "value3");
ret += kvstore_del(&teststore, key2);
ASSERT_EQUAL(ret, 0);
retval = NULL;
ret = kvstore_get(&teststore, key2, &retval);
ASSERT_PTR_NULL(retval);
ASSERT_EQUAL(ret, ERRNOKEY);
ret = kvstore_get(&teststore, key1, &retval);
ASSERT_STRING_EQUAL(retval, "value1");
free(retval);
ret += kvstore_get(&teststore, key3, &retval);
ASSERT_STRING_EQUAL(retval, "value3");
free(retval);
ASSERT_EQUAL(ret, 0);
return 1;
}
/* Removes the given KEY from this server's store and cache. Access to the
* cache should be concurrent if the keys are in different cache sets. Returns
* 0 if successful, else a negative error code. */
int kvserver_del(kvserver_t *server, char *key) {
// OUR CODE HERE
int ret;
pthread_rwlock_t *lock = kvcache_getlock(&server->cache, key);
if (lock == NULL) return ERRKEYLEN;
pthread_rwlock_wrlock(lock);
if ((ret = kvstore_del(&server->store, key)) < 0) {
pthread_rwlock_unlock(lock);
return ret;
}
pthread_rwlock_unlock(lock);
kvcache_del(&server->cache, key); // if not in server's cache, that's okay
return 0;
}
int kvstore_del_simple(void) {
char *retval;
int ret;
ret = kvstore_put(&teststore, "key", "val");
ret += kvstore_get(&teststore, "key", &retval);
ASSERT_STRING_EQUAL(retval, "val");
free(retval);
ret += kvstore_del(&teststore, "key");
ASSERT_EQUAL(ret, 0);
retval = NULL;
ret = kvstore_get(&teststore, "key", &retval);
ASSERT_EQUAL(ret, ERRNOKEY);
ASSERT_PTR_NULL(retval);
return 1;
}
static void
test_kvstore_del(void)
{
kvstore kvs;
char test_key[] = "hello";
char test_val[] = "world";
char *get_val = NULL;
CU_ASSERT_FATAL(NULL != (kvs = kvstore_new()));
CU_ASSERT(0 == kvstore_set(kvs, test_key, test_val));
get_val = kvstore_get(kvs, test_key);
CU_ASSERT(NULL != get_val);
CU_ASSERT(0 == strncmp(get_val, test_val, sizeof(test_val)));
CU_ASSERT(0 == kvstore_del(kvs, test_key));
get_val = kvstore_get(kvs, test_key);
CU_ASSERT(NULL == get_val);
CU_ASSERT(0 == kvstore_discard(kvs));
}
int kvstore_del_no_key(void) {
int ret;
ret = kvstore_del(&teststore, "nonexistent key");
ASSERT_EQUAL(ret, ERRNOKEY);
return 1;
}