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diff --git a/rubbos/app/apache2/include/apr_reslist.h b/rubbos/app/apache2/include/apr_reslist.h
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+/* Copyright 2000-2005 The Apache Software Foundation or its licensors, as
+ * applicable.
+ *
+ * Licensed 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 APR_RESLIST_H
+#define APR_RESLIST_H
+
+/** 
+ * @file apr_reslist.h
+ * @brief APR-UTIL Resource List Routines
+ */
+
+#include "apr.h"
+#include "apu.h"
+#include "apr_pools.h"
+#include "apr_errno.h"
+#include "apr_time.h"
+
+#if APR_HAS_THREADS
+
+/**
+ * @defgroup APR_Util_RL Resource List Routines
+ * @ingroup APR_Util
+ * @{
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/** Opaque resource list object */
+typedef struct apr_reslist_t apr_reslist_t;
+
+/* Generic constructor called by resource list when it needs to create a
+ * resource.
+ * @param resource opaque resource
+ * @param param flags
+ * @param pool  Pool
+ */
+typedef apr_status_t (*apr_reslist_constructor)(void **resource, void *params,
+                                                apr_pool_t *pool);
+
+/* Generic destructor called by resource list when it needs to destroy a
+ * resource.
+ * @param resource opaque resource
+ * @param param flags
+ * @param pool  Pool
+ */
+typedef apr_status_t (*apr_reslist_destructor)(void *resource, void *params,
+                                               apr_pool_t *pool);
+
+/**
+ * Create a new resource list with the following parameters:
+ * @param reslist An address where the pointer to the new resource
+ *                list will be stored.
+ * @param pool The pool to use for local storage and management
+ * @param min Allowed minimum number of available resources. Zero
+ *            creates new resources only when needed.
+ * @param smax Resources will be destroyed to meet this maximum
+ *             restriction as they expire.
+ * @param hmax Absolute maximum limit on the number of total resources.
+ * @param ttl If non-zero, sets the maximum amount of time a resource
+ *               may be available while exceeding the soft limit.
+ * @param con Constructor routine that is called to create a new resource.
+ * @param de Destructor routine that is called to destroy an expired resource.
+ * @param params Passed to constructor and deconstructor
+ * @param pool The pool from which to create this resoure list. Also the
+ *             same pool that is passed to the constructor and destructor
+ *             routines.
+ */
+APU_DECLARE(apr_status_t) apr_reslist_create(apr_reslist_t **reslist,
+                                             int min, int smax, int hmax,
+                                             apr_interval_time_t ttl,
+                                             apr_reslist_constructor con,
+                                             apr_reslist_destructor de,
+                                             void *params,
+                                             apr_pool_t *pool);
+
+/**
+ * Destroy the given resource list and all resources controlled by
+ * this list.
+ * FIXME: Should this block until all resources become available,
+ *        or maybe just destroy all the free ones, or maybe destroy
+ *        them even though they might be in use by something else?
+ * @param reslist The reslist to destroy
+ */
+APU_DECLARE(apr_status_t) apr_reslist_destroy(apr_reslist_t *reslist);
+
+/**
+ * Retrieve a resource from the list, creating a new one if necessary.
+ * If we have met our maximum number of resources, we will block
+ * until one becomes available.
+ */
+APU_DECLARE(apr_status_t) apr_reslist_acquire(apr_reslist_t *reslist,
+                                              void **resource);
+
+/**
+ * Return a resource back to the list of available resources.
+ */
+APU_DECLARE(apr_status_t) apr_reslist_release(apr_reslist_t *reslist,
+                                              void *resource);
+
+/**
+ * Set the timeout the acquire will wait for a free resource
+ * when the maximum number of resources is exceeded.
+ * @param reslist The resource list.
+ * @param timeout Timeout to wait. The zero waits forewer.
+ */
+APU_DECLARE(void) apr_reslist_timeout_set(apr_reslist_t *reslist,
+                                          apr_interval_time_t timeout);
+
+/**
+ * Invalidate a resource in the pool - e.g. a database connection
+ * that returns a "lost connection" error and can't be restored.
+ * Use this instead of apr_reslist_release if the resource is bad.
+ */
+APU_DECLARE(apr_status_t) apr_reslist_invalidate(apr_reslist_t *reslist,
+                                                 void *resource);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+/** @} */
+
+#endif  /* APR_HAS_THREADS */
+
+#endif  /* ! APR_RESLIST_H */