133 lines
3.8 KiB
C
133 lines
3.8 KiB
C
/*
|
|
* BIRD Resource Manager
|
|
*
|
|
* (c) 1998--1999 Martin Mares <mj@ucw.cz>
|
|
*
|
|
* Can be freely distributed and used under the terms of the GNU GPL.
|
|
*/
|
|
|
|
#ifndef _BIRD_RESOURCE_H_
|
|
#define _BIRD_RESOURCE_H_
|
|
|
|
#include "lib/lists.h"
|
|
|
|
/* Resource */
|
|
|
|
typedef struct resource {
|
|
node n; /* Inside resource pool */
|
|
struct resclass *class; /* Resource class */
|
|
} resource;
|
|
|
|
/* Resource class */
|
|
|
|
struct resclass {
|
|
char *name; /* Resource class name */
|
|
unsigned size; /* Standard size of single resource */
|
|
void (*free)(resource *); /* Freeing function */
|
|
void (*dump)(resource *); /* Dump to debug output */
|
|
resource *(*lookup)(resource *, unsigned long); /* Look up address (only for debugging) */
|
|
size_t (*memsize)(resource *); /* Return size of memory used by the resource, may be NULL */
|
|
};
|
|
|
|
/* Estimate of system allocator overhead per item, for memory consumtion stats */
|
|
#define ALLOC_OVERHEAD 8
|
|
|
|
/* Generic resource manipulation */
|
|
|
|
typedef struct pool pool;
|
|
|
|
void resource_init(void);
|
|
pool *rp_new(pool *, const char *); /* Create new pool */
|
|
void rfree(void *); /* Free single resource */
|
|
void rdump(void *); /* Dump to debug output */
|
|
size_t rmemsize(void *res); /* Return size of memory used by the resource */
|
|
void rlookup(unsigned long); /* Look up address (only for debugging) */
|
|
void rmove(void *, pool *); /* Move to a different pool */
|
|
|
|
void *ralloc(pool *, struct resclass *);
|
|
|
|
extern pool root_pool;
|
|
|
|
/* Normal memory blocks */
|
|
|
|
void *mb_alloc(pool *, unsigned size);
|
|
void *mb_allocz(pool *, unsigned size);
|
|
void *mb_realloc(void *m, unsigned size);
|
|
void mb_move(void *, pool *);
|
|
void mb_free(void *);
|
|
|
|
/* Memory pools with linear allocation */
|
|
|
|
typedef struct linpool linpool;
|
|
|
|
typedef struct lp_state {
|
|
void *current, *large;
|
|
byte *ptr;
|
|
} lp_state;
|
|
|
|
linpool *lp_new(pool *, unsigned blk);
|
|
void *lp_alloc(linpool *, unsigned size); /* Aligned */
|
|
void *lp_allocu(linpool *, unsigned size); /* Unaligned */
|
|
void *lp_allocz(linpool *, unsigned size); /* With clear */
|
|
void lp_flush(linpool *); /* Free everything, but leave linpool */
|
|
void lp_save(linpool *m, lp_state *p); /* Save state */
|
|
void lp_restore(linpool *m, lp_state *p); /* Restore state */
|
|
|
|
extern const int lp_chunk_size;
|
|
#define LP_GAS 1024
|
|
#define LP_GOOD_SIZE(x) (((x + LP_GAS - 1) & (~(LP_GAS - 1))) - lp_chunk_size)
|
|
#define lp_new_default(p) lp_new(p, LP_GOOD_SIZE(LP_GAS*4))
|
|
|
|
/* Slabs */
|
|
|
|
typedef struct slab slab;
|
|
|
|
slab *sl_new(pool *, unsigned size);
|
|
void *sl_alloc(slab *);
|
|
void *sl_allocz(slab *);
|
|
void sl_free(slab *, void *);
|
|
|
|
/*
|
|
* Low-level memory allocation functions, please don't use
|
|
* outside resource manager and possibly sysdep code.
|
|
*/
|
|
|
|
void buffer_realloc(void **buf, unsigned *size, unsigned need, unsigned item_size);
|
|
|
|
extern long page_size;
|
|
|
|
/* Allocator of whole pages; for use in slabs and other high-level allocators. */
|
|
void *alloc_page(pool *);
|
|
void free_page(pool *, void *);
|
|
#define PAGE_HEAD(x) ((void *) (((intptr_t) (x)) & ~(page_size-1)))
|
|
|
|
#ifdef HAVE_LIBDMALLOC
|
|
/*
|
|
* The standard dmalloc macros tend to produce lots of namespace
|
|
* conflicts and we use only xmalloc, xrealloc and xfree, so we
|
|
* can define the stubs ourselves.
|
|
*/
|
|
#define DMALLOC_DISABLE
|
|
#include <dmalloc.h>
|
|
#define xmalloc(size) \
|
|
dmalloc_malloc(__FILE__, __LINE__, (size), DMALLOC_FUNC_MALLOC, 0, 1)
|
|
#define xrealloc(ptr, size) \
|
|
dmalloc_realloc(__FILE__, __LINE__, (ptr), (size), DMALLOC_FUNC_REALLOC, 1)
|
|
#define xfree(ptr) \
|
|
dmalloc_free(__FILE__, __LINE__, (ptr), DMALLOC_FUNC_FREE)
|
|
|
|
#else
|
|
/*
|
|
* Unfortunately, several libraries we might want to link to define
|
|
* their own xmalloc and we don't want to interfere with them, hence
|
|
* the renaming.
|
|
*/
|
|
#define xmalloc bird_xmalloc
|
|
#define xrealloc bird_xrealloc
|
|
void *xmalloc(unsigned);
|
|
void *xrealloc(void *, unsigned);
|
|
#define xfree(x) free(x)
|
|
#endif
|
|
|
|
#endif
|
|
|