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diff --git a/src/lib/memorypool.h b/src/lib/memorypool.h
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+/*
+     This file is part of libmicrohttpd
+     Copyright (C) 2007, 2009 Daniel Pittman and Christian Grothoff
+
+     This library is free software; you can redistribute it and/or
+     modify it under the terms of the GNU Lesser General Public
+     License as published by the Free Software Foundation; either
+     version 2.1 of the License, or (at your option) any later version.
+
+     This library is distributed in the hope that it will be useful,
+     but WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     Lesser General Public License for more details.
+
+     You should have received a copy of the GNU Lesser General Public
+     License along with this library; if not, write to the Free Software
+     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+/**
+ * @file memorypool.h
+ * @brief memory pool; mostly used for efficient (de)allocation
+ *        for each connection and bounding memory use for each
+ *        request
+ * @author Christian Grothoff
+ */
+
+#ifndef MEMORYPOOL_H
+#define MEMORYPOOL_H
+
+#include "internal.h"
+
+/**
+ * Opaque handle for a memory pool.
+ * Pools are not reentrant and must not be used
+ * by multiple threads.
+ */
+struct MemoryPool;
+
+
+/**
+ * Create a memory pool.
+ *
+ * @param max maximum size of the pool
+ * @return NULL on error
+ */
+struct MemoryPool *
+MHD_pool_create (size_t max);
+
+
+/**
+ * Destroy a memory pool.
+ *
+ * @param pool memory pool to destroy
+ */
+void
+MHD_pool_destroy (struct MemoryPool *pool);
+
+
+/**
+ * Allocate size bytes from the pool.
+ *
+ * @param pool memory pool to use for the operation
+ * @param size number of bytes to allocate
+ * @param from_end allocate from end of pool (set to #MHD_YES);
+ *        use this for small, persistent allocations that
+ *        will never be reallocated
+ * @return NULL if the pool cannot support size more
+ *         bytes
+ */
+void *
+MHD_pool_allocate (struct MemoryPool *pool,
+                   size_t size,
+                   int from_end);
+
+
+/**
+ * Reallocate a block of memory obtained from the pool.
+ * This is particularly efficient when growing or
+ * shrinking the block that was last (re)allocated.
+ * If the given block is not the most recently
+ * (re)allocated block, the memory of the previous
+ * allocation may be leaked until the pool is
+ * destroyed (and copying the data maybe required).
+ *
+ * @param pool memory pool to use for the operation
+ * @param old the existing block
+ * @param old_size the size of the existing block
+ * @param new_size the new size of the block
+ * @return new address of the block, or
+ *         NULL if the pool cannot support new_size
+ *         bytes (old continues to be valid for old_size)
+ */
+void *
+MHD_pool_reallocate (struct MemoryPool *pool,
+                     void *old,
+                     size_t old_size,
+                     size_t new_size);
+
+
+/**
+ * Check how much memory is left in the @a pool
+ *
+ * @param pool pool to check
+ * @return number of bytes still available in @a pool
+ */
+size_t
+MHD_pool_get_free (struct MemoryPool *pool);
+
+
+/**
+ * Clear all entries from the memory pool except
+ * for @a keep of the given @a copy_bytes.  The pointer
+ * returned should be a buffer of @a new_size where
+ * the first @a copy_bytes are from @a keep.
+ *
+ * @param pool memory pool to use for the operation
+ * @param keep pointer to the entry to keep (maybe NULL)
+ * @param copy_bytes how many bytes need to be kept at this address
+ * @param new_size how many bytes should the allocation we return have?
+ *                 (should be larger or equal to @a copy_bytes)
+ * @return addr new address of @a keep (if it had to change)
+ */
+void *
+MHD_pool_reset (struct MemoryPool *pool,
+                void *keep,
+                size_t copy_bytes,
+                size_t new_size);
+
+#endif