diff -r 11f3bb408051 -r 62921b370c60 ucx/mempool.h
--- a/ucx/mempool.h	Wed Nov 22 12:59:13 2017 +0100
+++ b/ucx/mempool.h	Sun Jan 21 12:13:09 2018 +0100
@@ -1,7 +1,7 @@
 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  *
- * Copyright 2015 Olaf Wintermann. All rights reserved.
+ * Copyright 2016 Olaf Wintermann. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -70,39 +70,29 @@
 /**
  * Creates a memory pool with the specified initial size.
  * 
- * As the created memory pool automatically grows in size by 16 elements, when
+ * As the created memory pool automatically grows in size by factor two when
  * trying to allocate memory on a full pool, it is recommended that you use
- * a multiple of 16 for the initial size.
+ * a power of two for the initial size.
  * 
- * @param n initial pool size (should be a multiple of 16)
+ * @param n initial pool size (should be a power of two, e.g. 16)
  * @return a pointer to the new memory pool
+ * @see ucx_mempool_new_default()
  */
 UcxMempool *ucx_mempool_new(size_t n);
 
 /**
  * Resizes a memory pool.
  * 
+ * This function will fail if the new capacity is not sufficient for the
+ * present data.
+ * 
  * @param pool the pool to resize
  * @param newcap the new capacity
- * @return <code>EXIT_SUCCESS</code> on success or
- * <code>EXIT_FAILURE</code> on failure
+ * @return zero on success or non-zero on failure
  */
 int ucx_mempool_chcap(UcxMempool *pool, size_t newcap);
 
 /**
- * Changes the pool size to the next smallest multiple of 16.
- * 
- * You may use this macro, to reduce the pool size after freeing
- * many pooled memory items.
- * 
- * @param pool the pool to clamp
- * @return <code>EXIT_SUCCESS</code> on success or
- * <code>EXIT_FAILURE</code> on failure
- */
-#define ucx_mempool_clamp(pool) ucx_mempool_chcap(pool, \
-        (pool->ndata & ~0xF)+0x10)
-
-/**
  * Allocates pooled memory.
  * 
  * @param pool the memory pool
@@ -127,10 +117,8 @@
 /**
  * Reallocates pooled memory.
  * 
- * If the memory to be reallocated is not contained by the specified pool, this
- * function will possibly fail. In case the memory had to be moved to another
- * location, this function will print out a message to <code>stderr</code>
- * and exit the program with error code <code>EXIT_FAILURE</code>.
+ * If the memory to be reallocated is not contained by the specified pool, the
+ * behavior is undefined.
  * 
  * @param pool the memory pool
  * @param ptr a pointer to the memory that shall be reallocated
@@ -146,10 +134,8 @@
  * Before freeing the memory, the specified destructor function (if any)
  * is called.
  * 
- * If you specify memory, that is not pooled by the specified memory pool, this
- * is considered as a severe error and an error message is written to
- * <code>stderr</code> and the application is shut down with code
- * <code>EXIT_FAILURE</code>.
+ * If you specify memory, that is not pooled by the specified memory pool, the
+ * program will terminate with a call to <code>abort()</code>.
  * 
  * @param pool the memory pool
  * @param ptr a pointer to the memory that shall be freed
@@ -180,7 +166,7 @@
  * pool is destroyed.
  * 
  * The only requirement for the specified memory is, that it <b>MUST</b> be
- * pooled memory by an UcxMempool or an element-compatible mempool. The pointer
+ * pooled memory by a UcxMempool or an element-compatible mempool. The pointer
  * to the destructor function is saved in a reserved area before the actual
  * memory.
  *