147 lines
4.2 KiB
C
147 lines
4.2 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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* (c) 2021 Maria Matejka <mq@jmq.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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struct resmem {
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size_t effective; /* Memory actually used for data storage */
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size_t overhead; /* Overhead memory imposed by allocator strategies */
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};
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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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resource *(*lookup)(resource *, unsigned long); /* Look up address (only for debugging) */
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struct resmem (*memsize)(resource *); /* Return size of memory used by the resource, may be NULL */
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};
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/* Estimate of system allocator overhead per item, for memory consumtion stats */
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#define ALLOC_OVERHEAD 16
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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 *, const char *); /* Create new pool */
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pool *rp_newf(pool *, const char *, ...); /* Create a new pool with a formatted string as its name */
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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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struct resmem rmemsize(void *res); /* Return size of memory used by the resource */
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void rlookup(unsigned long); /* Look up address (only for debugging) */
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void rmove(void *, pool *); /* Move to a different pool */
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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_realloc(void *m, 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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typedef struct lp_state {
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void *current, *large;
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byte *ptr;
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uint total_large;
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} lp_state;
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linpool *lp_new(pool *);
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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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void lp_save(linpool *m, lp_state *p); /* Save state */
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void lp_restore(linpool *m, lp_state *p); /* Restore state */
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extern _Thread_local linpool *tmp_linpool; /* Temporary linpool autoflushed regularily */
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#define tmp_alloc(sz) lp_alloc(tmp_linpool, sz)
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#define tmp_allocu(sz) lp_allocu(tmp_linpool, sz)
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#define tmp_allocz(sz) lp_allocz(tmp_linpool, sz)
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#define tmp_init(p) tmp_linpool = lp_new_default(p)
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#define tmp_flush() lp_flush(tmp_linpool)
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#define lp_new_default lp_new
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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_allocz(slab *);
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void sl_free(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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void buffer_realloc(void **buf, unsigned *size, unsigned need, unsigned item_size);
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/* Allocator of whole pages; for use in slabs and other high-level allocators. */
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extern long page_size;
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void *alloc_page(void);
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void free_page(void *);
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void resource_sys_init(void);
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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, xrealloc and xfree, so we
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* can define 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) \
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dmalloc_malloc(__FILE__, __LINE__, (size), DMALLOC_FUNC_MALLOC, 0, 1)
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#define xrealloc(ptr, size) \
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dmalloc_realloc(__FILE__, __LINE__, (ptr), (size), DMALLOC_FUNC_REALLOC, 1)
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#define xfree(ptr) \
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dmalloc_free(__FILE__, __LINE__, (ptr), DMALLOC_FUNC_FREE)
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#else
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/*
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* Unfortunately, several libraries we might want to link to define
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* their own xmalloc and we don't want to interfere with them, hence
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* the renaming.
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*/
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#define xmalloc bird_xmalloc
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#define xrealloc bird_xrealloc
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void *xmalloc(unsigned);
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void *xrealloc(void *, unsigned);
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#define xfree(x) free(x)
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#endif
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#endif
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