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diff --git a/rubbos/app/apache2/include/ap_provider.h b/rubbos/app/apache2/include/ap_provider.h
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+++ b/rubbos/app/apache2/include/ap_provider.h
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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.
+ */
+
+#ifndef AP_PROVIDER_H
+#define AP_PROVIDER_H
+
+#include "ap_config.h"
+
+/**
+ * @package Provider API
+ */
+
+/**
+ * This function is used to register a provider with the global
+ * provider pool.
+ * @param pool The pool to create any storage from
+ * @param provider_group The group to store the provider in
+ * @param provider_name The name for this provider
+ * @param provider_version The version for this provider
+ * @param provider Opaque structure for this provider
+ * @return APR_SUCCESS if all went well
+ */
+AP_DECLARE(apr_status_t) ap_register_provider(apr_pool_t *pool,
+                                              const char *provider_group,
+                                              const char *provider_name,
+                                              const char *provider_version,
+                                              const void *provider);
+
+/**
+ * This function is used to retrieve a provider from the global
+ * provider pool.
+ * @param provider_group The group to look for this provider in
+ * @param provider_name The name for the provider
+ * @param provider_version The version for the provider
+ * @return provider pointer to provider if found, NULL otherwise
+ */
+AP_DECLARE(void *) ap_lookup_provider(const char *provider_group,
+                                      const char *provider_name,
+                                      const char *provider_version);
+
+#endif