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Diffstat (limited to 'tdb/include/tdb.h')
| -rw-r--r-- | tdb/include/tdb.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/tdb/include/tdb.h b/tdb/include/tdb.h new file mode 100644 index 000000000..c41c9941f --- /dev/null +++ b/tdb/include/tdb.h @@ -0,0 +1,168 @@ +#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 3 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, see <http://www.gnu.org/licenses/>. +*/ + +#ifdef __cplusplus +extern "C" { +#endif + +#include "signal.h" + +/* flags to tdb_store() */ +#define TDB_REPLACE 1 /* Unused */ +#define TDB_INSERT 2 /* Don't overwrite an existing entry */ +#define TDB_MODIFY 3 /* Don't create an existing entry */ + +/* 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_VOLATILE 256 /* Activate the per-hashchain freelist, default 5 */ + +#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 + +/* 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_add_flags(struct tdb_context *tdb, unsigned flag); +void tdb_remove_flags(struct tdb_context *tdb, unsigned flag); +void tdb_enable_seqnum(struct tdb_context *tdb); +void tdb_increment_seqnum_nonblock(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); + +void tdb_setalarm_sigptr(struct tdb_context *tdb, volatile sig_atomic_t *sigptr); + +/* 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); +int tdb_wipe_all(struct tdb_context *tdb); +int tdb_freelist_size(struct tdb_context *tdb); + +extern TDB_DATA tdb_null; + +#ifdef __cplusplus +} +#endif + +#endif /* tdb.h */ |