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diff --git a/rubbos/app/httpd-2.0.64/srclib/apr/atomic/os390/atomic.c b/rubbos/app/httpd-2.0.64/srclib/apr/atomic/os390/atomic.c
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+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+#include "apr.h"
+#include "apr_atomic.h"
+
+#if APR_HAS_THREADS
+
+apr_int32_t apr_atomic_add(volatile apr_atomic_t *mem, apr_int32_t val)
+{
+ apr_atomic_t old, new_val;
+
+ old = *mem; /* old is automatically updated on cs failure */
+ do {
+ new_val = old + val;
+ } while (__cs(&old, (cs_t *)mem, new_val));
+
+ return new_val;
+}
+
+apr_uint32_t apr_atomic_cas(volatile apr_atomic_t *mem, apr_uint32_t swap,
+ apr_uint32_t cmp)
+{
+ apr_uint32_t old = cmp;
+
+ __cs(&old, (cs_t *)mem, swap);
+ return old; /* old is automatically updated from mem on cs failure */
+}
+
+#endif /* APR_HAS_THREADS */