upload http

[bottlenecks.git] / rubbos / app / httpd-2.0.64 / srclib / apr / atomic / os390 / atomic.c

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 */