/* * ProFTPD - FTP server daemon * Copyright (c) 1997, 1998 Public Flood Software * Copyright (c) 1999, 2000 MacGyver aka Habeeb J. Dihu <macgyver@tos.net> * Copyright (c) 2001-2021 The ProFTPD Project team * * 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., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA. * * As a special exemption, Public Flood Software/MacGyver aka Habeeb J. Dihu * and other respective copyright holders give permission to link this program * with OpenSSL, and distribute the resulting executable, without including * the source code for OpenSSL in the source distribution. */ /* 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) */ #ifndef PR_POOL_H #define PR_POOL_H typedef struct pool_rec pool; /* Pool information */ typedef struct { /* Per pool */ int have_pool_info; const char *tag; const void *ptr; unsigned long byte_count; unsigned long block_count; unsigned int subpool_count; unsigned long level; /* Free list */ int have_freelist_info; unsigned long freelist_byte_count; unsigned long freelist_block_count; /* Total */ int have_total_info; unsigned long total_byte_count; unsigned long total_blocks_allocated; unsigned long total_blocks_reused; } pr_pool_info_t; extern pool *permanent_pool; void init_pools(void); void free_pools(void); pool *make_sub_pool(pool *); /* All pools are sub-pools of perm */ pool *pr_pool_create_sz(pool *parent_pool, size_t sz); /* Clears out _everything_ in a pool, destroying any sub-pools */ void destroy_pool(struct pool_rec *); /* Allocate memory from a pool */ void *palloc(struct pool_rec *, size_t); void *pallocsz(struct pool_rec *, size_t); void *pcalloc(struct pool_rec *, size_t); void *pcallocsz(struct pool_rec *, size_t); void pr_pool_tag(struct pool_rec *, const char *); const char *pr_pool_get_tag(struct pool_rec *); void pr_pool_debug_memory(void (*)(const char *, ...)); void pr_pool_debug_memory2(void (*cb)(const pr_pool_info_t *, void *), void *user_data); int pr_pool_debug_set_flags(int); #define PR_POOL_DEBUG_FL_OOM_DUMP_POOLS 0x001 /* Array management */ typedef struct { struct pool_rec *pool; size_t elt_size; unsigned int nelts; unsigned int nalloc; void *elts; } array_header; array_header *make_array(pool *, unsigned int, size_t); void clear_array(array_header *); void *push_array(array_header *); /* Concatenate two array_headers together. */ void array_cat(array_header *dst, const array_header *src); /* Similar to array_cat(), except that it provides a return value. */ int array_cat2(array_header *dst, const array_header *src); array_header *append_arrays(pool *, const array_header *, const array_header *); array_header *copy_array(pool *, const array_header *); array_header *copy_array_str(pool *, const array_header *); array_header *copy_array_hdr(pool *, const array_header *); /* Alarm signals can easily interfere with the pooled memory operations, thus * pr_alarms_block() and pr_alarms_unblock() provide for re-entrant security. */ extern void pr_alarms_block(void); extern void pr_alarms_unblock(void); void register_cleanup(pool *, void *, void (*)(void *), void (*)(void *)); void register_cleanup2(pool *, void *, void (*)(void *)); void unregister_cleanup(pool *, void *, void (*)(void *)); /* minimum free bytes in a new block pool */ #define BLOCK_MINFREE PR_TUNABLE_NEW_POOL_SIZE #endif /* PR_POOL_H */ SIMPAN PERUBAHAN