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-rw-r--r--external/unbound/util/regional.h150
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diff --git a/external/unbound/util/regional.h b/external/unbound/util/regional.h
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-/*
- * regional.h -- region based memory allocator.
- *
- * Copyright (c) 2007, NLnet Labs. All rights reserved.
- *
- * This software is open source.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * Neither the name of the NLNET LABS nor the names of its contributors may
- * be used to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
- * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/**
- * \file
- * Regional allocator. Allocates small portions of of larger chunks.
- * Based on region-allocator from NSD, but rewritten to be light.
- *
- * Different from (nsd) region-allocator.h
- * o does not have recycle bin
- * o does not collect stats; just enough to answer get_mem() in use.
- * o does not keep cleanup list
- * o does not have function pointers to setup
- * o allocs the regional struct inside the first block.
- * o can take a block to create regional from.
- * o blocks and large allocations are kept on singly linked lists.
- */
-
-#ifndef UTIL_REGIONAL_H_
-#define UTIL_REGIONAL_H_
-
-/**
- * the regional* is the first block*.
- * every block has a ptr to the next in first bytes.
- * and so does the regional struct, which is the first block.
- */
-struct regional
-{
- /**
- * next chunk. NULL if first chunk is the only chunk.
- * first inside that chunk is the char* next pointer.
- * When regional_free_all() has been called this value is NULL.
- */
- char* next;
- /** first large object, cast to char** to obtain next ptr */
- char* large_list;
- /** total large size */
- size_t total_large;
- /** initial chunk size */
- size_t first_size;
- /** number of bytes available in the current chunk. */
- size_t available;
- /** current chunk data position. */
- char* data;
-};
-
-/**
- * Create a new regional.
- * @return: newly allocated regional.
- */
-struct regional* regional_create(void);
-
-/**
- * Create a new region, with custom settings.
- * @param size: length of first block.
- * @return: newly allocated regional.
- */
-struct regional* regional_create_custom(size_t size);
-
-/**
- * Free all memory associated with regional. Only keeps the first block with
- * the regional inside it.
- * @param r: the region.
- */
-void regional_free_all(struct regional *r);
-
-/**
- * Destroy regional. All memory associated with regional is freed as if
- * regional_free_all was called, as well as destroying the regional struct.
- * @param r: to delete.
- */
-void regional_destroy(struct regional *r);
-
-/**
- * Allocate size bytes of memory inside regional. The memory is
- * deallocated when region_free_all is called for this region.
- * @param r: the region.
- * @param size: number of bytes.
- * @return: pointer to memory allocated.
- */
-void *regional_alloc(struct regional *r, size_t size);
-
-/**
- * Allocate size bytes of memory inside regional and copy INIT into it.
- * The memory is deallocated when region_free_all is called for this
- * region.
- * @param r: the region.
- * @param init: to copy.
- * @param size: number of bytes.
- * @return: pointer to memory allocated.
- */
-void *regional_alloc_init(struct regional* r, const void *init, size_t size);
-
-/**
- * Allocate size bytes of memory inside regional that are initialized to
- * 0. The memory is deallocated when region_free_all is called for
- * this region.
- * @param r: the region.
- * @param size: number of bytes.
- * @return: pointer to memory allocated.
- */
-void *regional_alloc_zero(struct regional *r, size_t size);
-
-/**
- * Duplicate string and allocate the result in regional.
- * @param r: the region.
- * @param string: null terminated string.
- * @return: pointer to memory allocated.
- */
-char *regional_strdup(struct regional *r, const char *string);
-
-/** Debug print regional statistics to log */
-void regional_log_stats(struct regional *r);
-
-/** get total memory size in use by region */
-size_t regional_get_mem(struct regional* r);
-
-#endif /* UTIL_REGIONAL_H_ */