pool.h
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- /*
- * ProFTPD - FTP server daemon
- * Copyright (c) 1997, 1998 Public Flood Software
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
- */
- /* Memory allocation/anti-leak system. Yes, this *IS* stolen from Apache
- * also. What can I say? It makes sense, and it's safe (more overhead
- * though)
- * $Id: pool.h,v 1.3 1999/08/31 01:31:59 flood Exp $
- */
- #ifndef __POOL_H
- #define __POOL_H
- typedef struct pool pool;
- extern pool *permanent_pool;
- void init_alloc();
- pool *make_sub_pool(pool*); /* All pools are sub-pools of perm */
- pool *make_named_sub_pool(pool*,const char*);
- /* Low-level memory allocation */
- void *xmalloc(size_t);
- void *xcalloc(size_t,size_t);
- void *xrealloc(void*,size_t);
- void pool_release_free_block_list(void);
- /* Clears out _everything_ in a pool, destroying any sub-pools */
- void destroy_pool(struct pool*);
- void cleanup_for_exec();
- /* allocate memory from a pool */
- void *palloc(struct pool*, int nbytes);
- void *pcalloc(struct pool*, int nbytes);
- extern char *pstrdup(struct pool*, const char *s);
- extern char *pstrndup(struct pool*, const char *s, int n);
- char *pstrcat(struct pool*,...); /* Must be char* */
- char *pdircat(struct pool*,...); /* Must be char* */
- /* MM debugging */
- void debug_walk_pools();
- /* Array management */
- typedef struct {
- pool *pool;
- int elt_size;
- int nelts;
- int nalloc;
- void *elts;
- } array_header;
- array_header *make_array(pool *p, int nelts, int elt_size);
- void *push_array(array_header*);
- void array_cat(array_header *dst, const array_header *src);
- array_header *append_arrays(pool *, const array_header *,
- const array_header *);
- array_header *copy_array(pool *p, const array_header *src);
- array_header *copy_array_hdr(pool *p, const array_header *src);
-
- /* Alarm signals can easily interfere with the pooled memory operations,
- thus block_alarms() and unblock_alarms() provide for re-entrant
- security. */
- extern void block_alarms();
- extern void unblock_alarms();
- FILE *pfopen(struct pool *, const char *name, const char *fmode);
- FILE *pfdopen(struct pool *, int fd, const char *fmode);
- int popenf(struct pool *, const char *name, int flg, int mode);
- int pfclose(struct pool *, FILE *);
- int pclosef(struct pool *, int fd);
- /* Functions for cleanup handlers */
- void register_cleanup(pool*,void*,void (*plain_cleanup)(void*),
- void (*child_cleanup)(void*));
- void kill_cleanup(pool*,void*,void (*cleanup)(void*));
- void cleanup_for_exec();
- /* minimum free bytes in a new block pool */
- #define BLOCK_MINFREE TUNABLE_NEW_POOL_SIZE
- /* accounting */
- long bytes_in_pool(pool *p);
- long bytes_in_free_blocks();
- #endif /* __POOL_H */