コード例 #1
0
ファイル: exec.c プロジェクト: strcp/implDBT2
static void check_deadlocks() {
	int key1, key2;
	char *sk1, *sk2;

	if (lock_waiting_list == NULL)
		return;

	GList *trans_waiting = g_hash_table_get_keys(wait_table);

	for (int i = 0; i < g_list_length(trans_waiting); i++) {
		sk1 = g_list_nth_data(trans_waiting, i);
		if (sk1 == NULL)
			continue;

		for (int j = 0; j < g_list_length(trans_waiting); j++) {
			sk2 = g_list_nth_data(trans_waiting, j);
			if (sk2 == NULL)
				continue;

			key1 = atoi(sk1);
			key2 = atoi(sk2);
			if (key1 == key2)
				continue;

			if (is_locking(key1, key2) && is_locking(key2, key1)) {
				printf("* DEADLOCK DETECTED *\n");

				// Selecionando pela operação mais velha
				sk1 = g_strdup_printf("%d", key1);
				GSList *op_list = g_hash_table_lookup(wait_table, sk1);
				g_free(sk1);

				if (g_slist_length(op_list) == 0)
					continue;

				struct operation *op = g_slist_nth_data(op_list, 0);
				if (op == NULL)
					continue;

				abort_transaction(op);
				return;
			}
		}
	}
}
コード例 #2
0
ファイル: server.c プロジェクト: jonsafari/mocp
/* Add clients file descriptors to fds. */
static void add_clients_fds (fd_set *read, fd_set *write)
{
	int i;

	for (i = 0; i < CLIENTS_MAX; i++)
		if (clients[i].socket != -1) {
			if (locking_client() == -1 || is_locking(&clients[i]))
				FD_SET (clients[i].socket, read);

			LOCK (clients[i].events_mtx);
			if (!event_queue_empty(&clients[i].events))
				FD_SET (clients[i].socket, write);
			UNLOCK (clients[i].events_mtx);
		}
}
コード例 #3
0
ファイル: server.c プロジェクト: jonsafari/mocp
/* Handle clients whose fds are ready to read. */
static void handle_clients (fd_set *fds)
{
	int i;

	for (i = 0; i < CLIENTS_MAX; i++)
		if (clients[i].socket != -1
				&& FD_ISSET(clients[i].socket, fds)) {
			if (locking_client() == -1
					|| is_locking(&clients[i]))
				handle_command (i);
			else
				debug ("Not getting a command from client with"
						" fd %d because of lock",
						clients[i].socket);
		}
}