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tdb.h
#ifndef __TDB_H__ #define __TDB_H__ /* Unix SMB/CIFS implementation. trivial database library Copyright (C) Andrew Tridgell 1999-2004 ** NOTE! The following LGPL license applies to the tdb ** library. This does NOT imply that all of Samba is released ** under the LGPL This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifdef __cplusplus extern "C" { #endif /* flags to tdb_store() */ #define TDB_REPLACE 1 #define TDB_INSERT 2 #define TDB_MODIFY 3 /* flags for tdb_open() */ #define TDB_DEFAULT 0 /* just a readability place holder */ #define TDB_CLEAR_IF_FIRST 1 #define TDB_INTERNAL 2 /* don't store on disk */ #define TDB_NOLOCK 4 /* don't do any locking */ #define TDB_NOMMAP 8 /* don't use mmap */ #define TDB_CONVERT 16 /* convert endian (internal use) */ #define TDB_BIGENDIAN 32 /* header is big-endian (internal use) */ #define TDB_NOSYNC 64 /* don't use synchronous transactions */ #define TDB_SEQNUM 128 /* maintain a sequence number */ #define TDB_ERRCODE(code, ret) ((tdb->ecode = (code)), ret) /* error codes */ enum TDB_ERROR {TDB_SUCCESS=0, TDB_ERR_CORRUPT, TDB_ERR_IO, TDB_ERR_LOCK, TDB_ERR_OOM, TDB_ERR_EXISTS, TDB_ERR_NOLOCK, TDB_ERR_LOCK_TIMEOUT, TDB_ERR_NOEXIST, TDB_ERR_EINVAL, TDB_ERR_RDONLY}; /* debugging uses one of the following levels */ enum tdb_debug_level {TDB_DEBUG_FATAL = 0, TDB_DEBUG_ERROR, TDB_DEBUG_WARNING, TDB_DEBUG_TRACE}; typedef struct TDB_DATA { unsigned char *dptr; size_t dsize; } TDB_DATA; #ifndef PRINTF_ATTRIBUTE #if (__GNUC__ >= 3) /** Use gcc attribute to check printf fns. a1 is the 1-based index of * the parameter containing the format, and a2 the index of the first * argument. Note that some gcc 2.x versions don't handle this * properly **/ #define PRINTF_ATTRIBUTE(a1, a2) __attribute__ ((format (__printf__, a1, a2))) #else #define PRINTF_ATTRIBUTE(a1, a2) #endif #endif /* ext2fs tdb renames */ #define tdb_open ext2fs_tdb_open #define tdb_open_ex ext2fs_tdb_open_ex #define tdb_set_max_dead ext2fs_tdb_set_max_dead #define tdb_reopen ext2fs_tdb_reopen #define tdb_reopen_all ext2fs_tdb_reopen_all #define tdb_set_logging_function ext2fs_tdb_set_logging_function #define tdb_error ext2fs_tdb_error #define tdb_errorstr ext2fs_tdb_errorstr #define tdb_fetch ext2fs_tdb_fetch #define tdb_parse_record ext2fs_tdb_parse_record #define tdb_delete ext2fs_tdb_delete #define tdb_store ext2fs_tdb_store #define tdb_append ext2fs_tdb_append #define tdb_close ext2fs_tdb_close #define tdb_firstkey ext2fs_tdb_firstkey #define tdb_nextkey ext2fs_tdb_nextkey #define tdb_traverse ext2fs_tdb_traverse #define tdb_traverse_read ext2fs_tdb_traverse_read #define tdb_exists ext2fs_tdb_exists #define tdb_lockall ext2fs_tdb_lockall #define tdb_unlockall ext2fs_tdb_unlockall #define tdb_lockall_read ext2fs_tdb_lockall_read #define tdb_unlockall_read ext2fs_tdb_unlockall_read #define tdb_name ext2fs_tdb_name #define tdb_fd ext2fs_tdb_fd #define tdb_log_fn ext2fs_tdb_log_fn #define tdb_get_logging_private ext2fs_tdb_get_logging_private #define tdb_transaction_start ext2fs_tdb_transaction_start #define tdb_transaction_commit ext2fs_tdb_transaction_commit #define tdb_transaction_cancel ext2fs_tdb_transaction_cancel #define tdb_transaction_recover ext2fs_tdb_transaction_recover #define tdb_get_seqnum ext2fs_tdb_get_seqnum #define tdb_hash_size ext2fs_tdb_hash_size #define tdb_map_size ext2fs_tdb_map_size #define tdb_get_flags ext2fs_tdb_get_flags #define tdb_chainlock ext2fs_tdb_chainlock #define tdb_chainunlock ext2fs_tdb_chainunlock #define tdb_chainlock_read ext2fs_tdb_chainlock_read #define tdb_chainunlock_read ext2fs_tdb_chainunlock_read #define tdb_dump_all ext2fs_tdb_dump_all #define tdb_printfreelist ext2fs_tdb_printfreelist #define tdb_validate_freelist ext2fs_tdb_validate_freelist #define tdb_chainlock_mark ext2fs_tdb_chainlock_mark #define tdb_chainlock_nonblock ext2fs_tdb_chainlock_nonblock #define tdb_chainlock_unmark ext2fs_tdb_chainlock_unmark #define tdb_enable_seqnum ext2fs_tdb_enable_seqnum #define tdb_increment_seqnum_nonblock ext2fs_tdb_increment_seqnum_nonblock #define tdb_lock_nonblock ext2fs_tdb_lock_nonblock #define tdb_lockall_mark ext2fs_tdb_lockall_mark #define tdb_lockall_nonblock ext2fs_tdb_lockall_nonblock #define tdb_lockall_read_nonblock ext2fs_tdb_lockall_read_nonblock #define tdb_lockall_unmark ext2fs_tdb_lockall_unmark #define tdb_flush ext2fs_tdb_flush /* this is the context structure that is returned from a db open */ typedef struct tdb_context TDB_CONTEXT; typedef int (*tdb_traverse_func)(struct tdb_context *, TDB_DATA, TDB_DATA, void *); typedef void (*tdb_log_func)(struct tdb_context *, enum tdb_debug_level, const char *, ...) PRINTF_ATTRIBUTE(3, 4); typedef unsigned int (*tdb_hash_func)(TDB_DATA *key); struct tdb_logging_context { tdb_log_func log_fn; void *log_private; }; struct tdb_context *tdb_open(const char *name, int hash_size, int tdb_flags, int open_flags, mode_t mode); struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags, int open_flags, mode_t mode, const struct tdb_logging_context *log_ctx, tdb_hash_func hash_fn); void tdb_set_max_dead(struct tdb_context *tdb, int max_dead); int tdb_reopen(struct tdb_context *tdb); int tdb_reopen_all(int parent_longlived); void tdb_set_logging_function(struct tdb_context *tdb, const struct tdb_logging_context *log_ctx); enum TDB_ERROR tdb_error(struct tdb_context *tdb); const char *tdb_errorstr(struct tdb_context *tdb); TDB_DATA tdb_fetch(struct tdb_context *tdb, TDB_DATA key); int tdb_parse_record(struct tdb_context *tdb, TDB_DATA key, int (*parser)(TDB_DATA key, TDB_DATA data, void *private_data), void *private_data); int tdb_delete(struct tdb_context *tdb, TDB_DATA key); int tdb_store(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf, int flag); int tdb_append(struct tdb_context *tdb, TDB_DATA key, TDB_DATA new_dbuf); int tdb_close(struct tdb_context *tdb); TDB_DATA tdb_firstkey(struct tdb_context *tdb); TDB_DATA tdb_nextkey(struct tdb_context *tdb, TDB_DATA key); int tdb_traverse(struct tdb_context *tdb, tdb_traverse_func fn, void *); int tdb_traverse_read(struct tdb_context *tdb, tdb_traverse_func fn, void *); int tdb_exists(struct tdb_context *tdb, TDB_DATA key); int tdb_lockall(struct tdb_context *tdb); int tdb_lockall_nonblock(struct tdb_context *tdb); int tdb_unlockall(struct tdb_context *tdb); int tdb_lockall_read(struct tdb_context *tdb); int tdb_lockall_read_nonblock(struct tdb_context *tdb); int tdb_unlockall_read(struct tdb_context *tdb); int tdb_lockall_mark(struct tdb_context *tdb); int tdb_lockall_unmark(struct tdb_context *tdb); const char *tdb_name(struct tdb_context *tdb); int tdb_fd(struct tdb_context *tdb); tdb_log_func tdb_log_fn(struct tdb_context *tdb); void *tdb_get_logging_private(struct tdb_context *tdb); int tdb_transaction_start(struct tdb_context *tdb); int tdb_transaction_commit(struct tdb_context *tdb); int tdb_transaction_cancel(struct tdb_context *tdb); int tdb_transaction_recover(struct tdb_context *tdb); int tdb_get_seqnum(struct tdb_context *tdb); int tdb_hash_size(struct tdb_context *tdb); size_t tdb_map_size(struct tdb_context *tdb); int tdb_get_flags(struct tdb_context *tdb); void tdb_enable_seqnum(struct tdb_context *tdb); void tdb_increment_seqnum_nonblock(struct tdb_context *tdb); int tdb_flush(struct tdb_context *tdb); /* Low level locking functions: use with care */ int tdb_chainlock(struct tdb_context *tdb, TDB_DATA key); int tdb_chainlock_nonblock(struct tdb_context *tdb, TDB_DATA key); int tdb_chainunlock(struct tdb_context *tdb, TDB_DATA key); int tdb_chainlock_read(struct tdb_context *tdb, TDB_DATA key); int tdb_chainunlock_read(struct tdb_context *tdb, TDB_DATA key); int tdb_chainlock_mark(struct tdb_context *tdb, TDB_DATA key); int tdb_chainlock_unmark(struct tdb_context *tdb, TDB_DATA key); /* Debug functions. Not used in production. */ void tdb_dump_all(struct tdb_context *tdb); int tdb_printfreelist(struct tdb_context *tdb); int tdb_validate_freelist(struct tdb_context *tdb, int *pnum_entries); #ifdef __cplusplus } #endif #endif /* tdb.h */
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