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f5c687f791
memory available for subsequent allocations from the same pool. Both flushing and re-using the memory costs just few instructions.
88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
/*
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* BIRD Resource Manager
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*
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* (c) 1998--1999 Martin Mares <mj@ucw.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#ifndef _BIRD_RESOURCE_H_
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#define _BIRD_RESOURCE_H_
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#include "lib/lists.h"
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/* Resource */
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typedef struct resource {
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node n; /* Inside resource pool */
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struct resclass *class; /* Resource class */
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} resource;
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/* Resource class */
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struct resclass {
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char *name; /* Resource class name */
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unsigned size; /* Standard size of single resource */
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void (*free)(resource *); /* Freeing function */
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void (*dump)(resource *); /* Dump to debug output */
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};
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/* Generic resource manipulation */
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typedef struct pool pool;
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void resource_init(void);
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pool *rp_new(pool *, char *); /* Create new pool */
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void rfree(void *); /* Free single resource */
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void rdump(void *); /* Dump to debug output */
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void *ralloc(pool *, struct resclass *);
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extern pool root_pool;
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/* Normal memory blocks */
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void *mb_alloc(pool *, unsigned size);
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void *mb_allocz(pool *, unsigned size);
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void mb_free(void *);
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/* Memory pools with linear allocation */
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typedef struct linpool linpool;
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linpool *lp_new(pool *, unsigned blk);
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void *lp_alloc(linpool *, unsigned size); /* Aligned */
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void *lp_allocu(linpool *, unsigned size); /* Unaligned */
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void *lp_allocz(linpool *, unsigned size); /* With clear */
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void lp_flush(linpool *); /* Free everything, but leave linpool */
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/* Slabs */
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typedef struct slab slab;
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slab *sl_new(pool *, unsigned size);
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void *sl_alloc(slab *);
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void sl_free(slab *, void *);
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/*
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* Low-level memory allocation functions, please don't use
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* outside resource manager and possibly sysdep code.
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*/
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#ifdef HAVE_LIBDMALLOC
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/*
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* The standard dmalloc macros tend to produce lots of namespace
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* conflicts and we use only xmalloc and xfree, so we can define
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* the stubs ourselves.
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*/
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#define DMALLOC_DISABLE
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#include <dmalloc.h>
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#define xmalloc(size) _xmalloc_leap(__FILE__, __LINE__, size)
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#define xfree(ptr) _xfree_leap(__FILE__, __LINE__, ptr)
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#else
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void *xmalloc(unsigned);
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#define xfree(x) free(x)
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#endif
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#endif
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