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database/apache/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.
+ */
+
+/**
+ * @file  ap_provider.h
+ * @brief Apache Provider API
+ *
+ * @defgroup APACHE_CORE_PROVIDER Provider API
+ * @ingroup  APACHE_CORE
+ * @{
+ */
+
+#ifndef AP_PROVIDER_H
+#define AP_PROVIDER_H
+
+#include "ap_config.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct {
+    const char *provider_name;
+} ap_list_provider_names_t;
+
+typedef struct {
+    const char *provider_group;
+    const char *provider_version;
+} ap_list_provider_groups_t;
+
+/**
+ * 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);
+
+/**
+ * This function is used to retrieve a list (array) of provider
+ * names from the specified group with the specified version.
+ * @param pool The pool to create any storage from
+ * @param provider_group The group to look for this provider in
+ * @param provider_version The version for the provider
+ * @return pointer to array of ap_list_provider_names_t of provider names (could be empty)
+ */
+
+AP_DECLARE(apr_array_header_t *) ap_list_provider_names(apr_pool_t *pool,
+                                              const char *provider_group,
+                                              const char *provider_version);
+
+/**
+ * This function is used to retrieve a list (array) of provider groups and versions
+ * @param pool The pool to create any storage from
+ * @return pointer to array of ap_list_provider_groups_t of provider groups
+ *         and versions (could be empty)
+ */
+
+AP_DECLARE(apr_array_header_t *) ap_list_provider_groups(apr_pool_t *pool);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/** @} */