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a85b5759f3
These files were pulled from the 1.6.3 release tarball. This new version builds against OpenSSL version 1.1 which will be the default in the new Debian Stable which is due to be released RealSoonNow (tm).
217 lines
8 KiB
C
217 lines
8 KiB
C
/*
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* util/alloc.h - memory allocation service.
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*
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* Copyright (c) 2007, NLnet Labs. All rights reserved.
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*
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* This software is open source.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the NLNET LABS nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \file
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*
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* This file contains memory allocation functions.
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*
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* The reasons for this service are:
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* o Avoid locking costs of getting global lock to call malloc().
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* o The packed rrset type needs to be kept on special freelists,
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* so that they are reused for other packet rrset allocations.
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*
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*/
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#ifndef UTIL_ALLOC_H
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#define UTIL_ALLOC_H
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#include "util/locks.h"
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struct ub_packed_rrset_key;
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struct regional;
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/** The special type, packed rrset. Not allowed to be used for other memory */
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typedef struct ub_packed_rrset_key alloc_special_type;
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/** clean the special type. Pass pointer. */
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#define alloc_special_clean(x) (x)->id = 0;
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/** access next pointer. (in available spot). Pass pointer. */
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#define alloc_special_next(x) ((alloc_special_type*)((x)->entry.overflow_next))
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/** set next pointer. (in available spot). Pass pointers. */
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#define alloc_set_special_next(x, y) \
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((x)->entry.overflow_next) = (struct lruhash_entry*)(y);
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/** how many blocks to cache locally. */
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#define ALLOC_SPECIAL_MAX 10
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/**
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* Structure that provides allocation. Use one per thread.
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* The one on top has a NULL super pointer.
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*/
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struct alloc_cache {
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/** lock, only used for the super. */
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lock_quick_type lock;
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/** global allocator above this one. NULL for none (malloc/free) */
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struct alloc_cache* super;
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/** singly linked lists of special type. These are free for use. */
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alloc_special_type* quar;
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/** number of items in quarantine. */
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size_t num_quar;
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/** thread number for id creation */
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int thread_num;
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/** next id number to pass out */
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uint64_t next_id;
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/** last id number possible */
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uint64_t last_id;
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/** what function to call to cleanup when last id is reached */
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void (*cleanup)(void*);
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/** user arg for cleanup */
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void* cleanup_arg;
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/** how many regional blocks to keep back max */
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size_t max_reg_blocks;
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/** how many regional blocks are kept now */
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size_t num_reg_blocks;
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/** linked list of regional blocks, using regional->next */
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struct regional* reg_list;
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};
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/**
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* Init alloc (zeroes the struct).
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* @param alloc: this parameter is allocated by the caller.
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* @param super: super to use (init that before with super_init).
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* Pass this argument NULL to init the toplevel alloc structure.
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* @param thread_num: thread number for id creation of special type.
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*/
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void alloc_init(struct alloc_cache* alloc, struct alloc_cache* super,
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int thread_num);
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/**
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* Free the alloc. Pushes all the cached items into the super structure.
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* Or deletes them if alloc->super is NULL.
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* Does not free the alloc struct itself (it was also allocated by caller).
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* @param alloc: is almost zeroed on exit (except some stats).
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*/
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void alloc_clear(struct alloc_cache* alloc);
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/**
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* Get a new special_type element.
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* @param alloc: where to alloc it.
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* @return: memory block. Will not return NULL (instead fatal_exit).
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* The block is zeroed.
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*/
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alloc_special_type* alloc_special_obtain(struct alloc_cache* alloc);
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/**
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* Return special_type back to pool.
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* The block is cleaned up (zeroed) which also invalidates the ID inside.
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* @param alloc: where to alloc it.
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* @param mem: block to free.
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*/
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void alloc_special_release(struct alloc_cache* alloc, alloc_special_type* mem);
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/**
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* Set ID number of special type to a fresh new ID number.
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* In case of ID number overflow, the rrset cache has to be cleared.
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* @param alloc: the alloc cache
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* @return: fresh id is returned.
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*/
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uint64_t alloc_get_id(struct alloc_cache* alloc);
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/**
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* Get memory size of alloc cache, alloc structure including special types.
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* @param alloc: on what alloc.
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* @return size in bytes.
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*/
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size_t alloc_get_mem(struct alloc_cache* alloc);
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/**
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* Print debug information (statistics).
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* @param alloc: on what alloc.
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*/
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void alloc_stats(struct alloc_cache* alloc);
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/**
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* Get a new regional for query states
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* @param alloc: where to alloc it.
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* @return regional for use or NULL on alloc failure.
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*/
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struct regional* alloc_reg_obtain(struct alloc_cache* alloc);
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/**
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* Put regional for query states back into alloc cache.
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* @param alloc: where to alloc it.
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* @param r: regional to put back.
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*/
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void alloc_reg_release(struct alloc_cache* alloc, struct regional* r);
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/**
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* Set cleanup on ID overflow callback function. This should remove all
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* RRset ID references from the program. Clear the caches.
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* @param alloc: the alloc
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* @param cleanup: the callback function, called as cleanup(arg).
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* @param arg: user argument to callback function.
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*/
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void alloc_set_id_cleanup(struct alloc_cache* alloc, void (*cleanup)(void*),
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void* arg);
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#ifdef UNBOUND_ALLOC_LITE
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# include <sldns/ldns.h>
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# include <sldns/packet.h>
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# ifdef HAVE_OPENSSL_SSL_H
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# include <openssl/ssl.h>
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# endif
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# define malloc(s) unbound_stat_malloc_lite(s, __FILE__, __LINE__, __func__)
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# define calloc(n,s) unbound_stat_calloc_lite(n, s, __FILE__, __LINE__, __func__)
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# define free(p) unbound_stat_free_lite(p, __FILE__, __LINE__, __func__)
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# define realloc(p,s) unbound_stat_realloc_lite(p, s, __FILE__, __LINE__, __func__)
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void *unbound_stat_malloc_lite(size_t size, const char* file, int line,
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const char* func);
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void *unbound_stat_calloc_lite(size_t nmemb, size_t size, const char* file,
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int line, const char* func);
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void unbound_stat_free_lite(void *ptr, const char* file, int line,
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const char* func);
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void *unbound_stat_realloc_lite(void *ptr, size_t size, const char* file,
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int line, const char* func);
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# ifdef strdup
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# undef strdup
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# endif
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# define strdup(s) unbound_strdup_lite(s, __FILE__, __LINE__, __func__)
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char* unbound_strdup_lite(const char* s, const char* file, int line,
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const char* func);
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char* unbound_lite_wrapstr(char* s);
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# define sldns_rr2str(rr) unbound_lite_wrapstr(sldns_rr2str(rr))
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# define sldns_rdf2str(rdf) unbound_lite_wrapstr(sldns_rdf2str(rdf))
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# define sldns_rr_type2str(t) unbound_lite_wrapstr(sldns_rr_type2str(t))
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# define sldns_rr_class2str(c) unbound_lite_wrapstr(sldns_rr_class2str(c))
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# define sldns_rr_list2str(r) unbound_lite_wrapstr(sldns_rr_list2str(r))
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# define sldns_pkt2str(p) unbound_lite_wrapstr(sldns_pkt2str(p))
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# define sldns_pkt_rcode2str(r) unbound_lite_wrapstr(sldns_pkt_rcode2str(r))
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# define sldns_pkt2wire(a, r, s) unbound_lite_pkt2wire(a, r, s)
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sldns_status unbound_lite_pkt2wire(uint8_t **dest, const sldns_pkt *p, size_t *size);
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# define i2d_DSA_SIG(d, s) unbound_lite_i2d_DSA_SIG(d, s)
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int unbound_lite_i2d_DSA_SIG(DSA_SIG* dsasig, unsigned char** sig);
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#endif /* UNBOUND_ALLOC_LITE */
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#endif /* UTIL_ALLOC_H */
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