217 lines
7.9 KiB
C
217 lines
7.9 KiB
C
/*
|
|
* util/alloc.h - memory allocation service.
|
|
*
|
|
* 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
|
|
*
|
|
* This file contains memory allocation functions.
|
|
*
|
|
* The reasons for this service are:
|
|
* o Avoid locking costs of getting global lock to call malloc().
|
|
* o The packed rrset type needs to be kept on special freelists,
|
|
* so that they are reused for other packet rrset allocations.
|
|
*
|
|
*/
|
|
|
|
#ifndef UTIL_ALLOC_H
|
|
#define UTIL_ALLOC_H
|
|
|
|
#include "util/locks.h"
|
|
struct ub_packed_rrset_key;
|
|
struct regional;
|
|
|
|
/** The special type, packed rrset. Not allowed to be used for other memory */
|
|
typedef struct ub_packed_rrset_key alloc_special_t;
|
|
/** clean the special type. Pass pointer. */
|
|
#define alloc_special_clean(x) (x)->id = 0;
|
|
/** access next pointer. (in available spot). Pass pointer. */
|
|
#define alloc_special_next(x) ((alloc_special_t*)((x)->entry.overflow_next))
|
|
/** set next pointer. (in available spot). Pass pointers. */
|
|
#define alloc_set_special_next(x, y) \
|
|
((x)->entry.overflow_next) = (struct lruhash_entry*)(y);
|
|
|
|
/** how many blocks to cache locally. */
|
|
#define ALLOC_SPECIAL_MAX 10
|
|
|
|
/**
|
|
* Structure that provides allocation. Use one per thread.
|
|
* The one on top has a NULL super pointer.
|
|
*/
|
|
struct alloc_cache {
|
|
/** lock, only used for the super. */
|
|
lock_quick_t lock;
|
|
/** global allocator above this one. NULL for none (malloc/free) */
|
|
struct alloc_cache* super;
|
|
/** singly linked lists of special type. These are free for use. */
|
|
alloc_special_t* quar;
|
|
/** number of items in quarantine. */
|
|
size_t num_quar;
|
|
/** thread number for id creation */
|
|
int thread_num;
|
|
/** next id number to pass out */
|
|
uint64_t next_id;
|
|
/** last id number possible */
|
|
uint64_t last_id;
|
|
/** what function to call to cleanup when last id is reached */
|
|
void (*cleanup)(void*);
|
|
/** user arg for cleanup */
|
|
void* cleanup_arg;
|
|
|
|
/** how many regional blocks to keep back max */
|
|
size_t max_reg_blocks;
|
|
/** how many regional blocks are kept now */
|
|
size_t num_reg_blocks;
|
|
/** linked list of regional blocks, using regional->next */
|
|
struct regional* reg_list;
|
|
};
|
|
|
|
/**
|
|
* Init alloc (zeroes the struct).
|
|
* @param alloc: this parameter is allocated by the caller.
|
|
* @param super: super to use (init that before with super_init).
|
|
* Pass this argument NULL to init the toplevel alloc structure.
|
|
* @param thread_num: thread number for id creation of special type.
|
|
*/
|
|
void alloc_init(struct alloc_cache* alloc, struct alloc_cache* super,
|
|
int thread_num);
|
|
|
|
/**
|
|
* Free the alloc. Pushes all the cached items into the super structure.
|
|
* Or deletes them if alloc->super is NULL.
|
|
* Does not free the alloc struct itself (it was also allocated by caller).
|
|
* @param alloc: is almost zeroed on exit (except some stats).
|
|
*/
|
|
void alloc_clear(struct alloc_cache* alloc);
|
|
|
|
/**
|
|
* Get a new special_t element.
|
|
* @param alloc: where to alloc it.
|
|
* @return: memory block. Will not return NULL (instead fatal_exit).
|
|
* The block is zeroed.
|
|
*/
|
|
alloc_special_t* alloc_special_obtain(struct alloc_cache* alloc);
|
|
|
|
/**
|
|
* Return special_t back to pool.
|
|
* The block is cleaned up (zeroed) which also invalidates the ID inside.
|
|
* @param alloc: where to alloc it.
|
|
* @param mem: block to free.
|
|
*/
|
|
void alloc_special_release(struct alloc_cache* alloc, alloc_special_t* mem);
|
|
|
|
/**
|
|
* Set ID number of special type to a fresh new ID number.
|
|
* In case of ID number overflow, the rrset cache has to be cleared.
|
|
* @param alloc: the alloc cache
|
|
* @return: fresh id is returned.
|
|
*/
|
|
uint64_t alloc_get_id(struct alloc_cache* alloc);
|
|
|
|
/**
|
|
* Get memory size of alloc cache, alloc structure including special types.
|
|
* @param alloc: on what alloc.
|
|
* @return size in bytes.
|
|
*/
|
|
size_t alloc_get_mem(struct alloc_cache* alloc);
|
|
|
|
/**
|
|
* Print debug information (statistics).
|
|
* @param alloc: on what alloc.
|
|
*/
|
|
void alloc_stats(struct alloc_cache* alloc);
|
|
|
|
/**
|
|
* Get a new regional for query states
|
|
* @param alloc: where to alloc it.
|
|
* @return regional for use or NULL on alloc failure.
|
|
*/
|
|
struct regional* alloc_reg_obtain(struct alloc_cache* alloc);
|
|
|
|
/**
|
|
* Put regional for query states back into alloc cache.
|
|
* @param alloc: where to alloc it.
|
|
* @param r: regional to put back.
|
|
*/
|
|
void alloc_reg_release(struct alloc_cache* alloc, struct regional* r);
|
|
|
|
/**
|
|
* Set cleanup on ID overflow callback function. This should remove all
|
|
* RRset ID references from the program. Clear the caches.
|
|
* @param alloc: the alloc
|
|
* @param cleanup: the callback function, called as cleanup(arg).
|
|
* @param arg: user argument to callback function.
|
|
*/
|
|
void alloc_set_id_cleanup(struct alloc_cache* alloc, void (*cleanup)(void*),
|
|
void* arg);
|
|
|
|
#ifdef UNBOUND_ALLOC_LITE
|
|
# include <ldns/ldns.h>
|
|
# include <ldns/packet.h>
|
|
# ifdef HAVE_OPENSSL_SSL_H
|
|
# include <openssl/ssl.h>
|
|
# endif
|
|
# define malloc(s) unbound_stat_malloc_lite(s, __FILE__, __LINE__, __func__)
|
|
# define calloc(n,s) unbound_stat_calloc_lite(n, s, __FILE__, __LINE__, __func__)
|
|
# define free(p) unbound_stat_free_lite(p, __FILE__, __LINE__, __func__)
|
|
# define realloc(p,s) unbound_stat_realloc_lite(p, s, __FILE__, __LINE__, __func__)
|
|
void *unbound_stat_malloc_lite(size_t size, const char* file, int line,
|
|
const char* func);
|
|
void *unbound_stat_calloc_lite(size_t nmemb, size_t size, const char* file,
|
|
int line, const char* func);
|
|
void unbound_stat_free_lite(void *ptr, const char* file, int line,
|
|
const char* func);
|
|
void *unbound_stat_realloc_lite(void *ptr, size_t size, const char* file,
|
|
int line, const char* func);
|
|
# ifdef strdup
|
|
# undef strdup
|
|
# endif
|
|
# define strdup(s) unbound_strdup_lite(s, __FILE__, __LINE__, __func__)
|
|
char* unbound_strdup_lite(const char* s, const char* file, int line,
|
|
const char* func);
|
|
char* unbound_lite_wrapstr(char* s);
|
|
# define sldns_rr2str(rr) unbound_lite_wrapstr(sldns_rr2str(rr))
|
|
# define sldns_rdf2str(rdf) unbound_lite_wrapstr(sldns_rdf2str(rdf))
|
|
# define sldns_rr_type2str(t) unbound_lite_wrapstr(sldns_rr_type2str(t))
|
|
# define sldns_rr_class2str(c) unbound_lite_wrapstr(sldns_rr_class2str(c))
|
|
# define sldns_rr_list2str(r) unbound_lite_wrapstr(sldns_rr_list2str(r))
|
|
# define sldns_pkt2str(p) unbound_lite_wrapstr(sldns_pkt2str(p))
|
|
# define sldns_pkt_rcode2str(r) unbound_lite_wrapstr(sldns_pkt_rcode2str(r))
|
|
# define sldns_pkt2wire(a, r, s) unbound_lite_pkt2wire(a, r, s)
|
|
sldns_status unbound_lite_pkt2wire(uint8_t **dest, const sldns_pkt *p, size_t *size);
|
|
# define i2d_DSA_SIG(d, s) unbound_lite_i2d_DSA_SIG(d, s)
|
|
int unbound_lite_i2d_DSA_SIG(DSA_SIG* dsasig, unsigned char** sig);
|
|
#endif /* UNBOUND_ALLOC_LITE */
|
|
|
|
#endif /* UTIL_ALLOC_H */
|