169 #include <sys/types.h>
170 #include <inttypes.h>
179 typedef int mdb_mode_t;
181 typedef mode_t mdb_mode_t;
185 # define MDB_FMT_Z "I"
187 # define MDB_FMT_Z "z"
196 typedef size_t mdb_size_t;
197 # define MDB_SIZE_MAX SIZE_MAX
199 # define MDB_PRIy(t) MDB_FMT_Z #t
201 # define MDB_SCNy(t) MDB_FMT_Z #t
203 typedef uint64_t mdb_size_t;
204 # define MDB_SIZE_MAX UINT64_MAX
205 # define MDB_PRIy(t) PRI##t##64
206 # define MDB_SCNy(t) SCN##t##64
207 # define mdb_env_create mdb_env_create_vl32
215 typedef void *mdb_filehandle_t;
217 typedef int mdb_filehandle_t;
228 #define MDB_VERSION_MAJOR 0
230 #define MDB_VERSION_MINOR 9
232 #define MDB_VERSION_PATCH 70
235 #define MDB_VERINT(a,b,c) (((a) << 24) | ((b) << 16) | (c))
238 #define MDB_VERSION_FULL \
239 MDB_VERINT(MDB_VERSION_MAJOR,MDB_VERSION_MINOR,MDB_VERSION_PATCH)
242 #define MDB_VERSION_DATE "December 19, 2015"
245 #define MDB_VERSTR(a,b,c,d) "LMDB " #a "." #b "." #c ": (" d ")"
248 #define MDB_VERFOO(a,b,c,d) MDB_VERSTR(a,b,c,d)
251 #define MDB_VERSION_STRING \
252 MDB_VERFOO(MDB_VERSION_MAJOR,MDB_VERSION_MINOR,MDB_VERSION_PATCH,MDB_VERSION_DATE)
314 #define MDB_FIXEDMAP 0x01
316 #define MDB_NOSUBDIR 0x4000
318 #define MDB_NOSYNC 0x10000
320 #define MDB_RDONLY 0x20000
322 #define MDB_NOMETASYNC 0x40000
324 #define MDB_WRITEMAP 0x80000
326 #define MDB_MAPASYNC 0x100000
328 #define MDB_NOTLS 0x200000
330 #define MDB_NOLOCK 0x400000
332 #define MDB_NORDAHEAD 0x800000
334 #define MDB_NOMEMINIT 0x1000000
336 #define MDB_PREVSNAPSHOT 0x2000000
343 #define MDB_REVERSEKEY 0x02
345 #define MDB_DUPSORT 0x04
349 #define MDB_INTEGERKEY 0x08
351 #define MDB_DUPFIXED 0x10
353 #define MDB_INTEGERDUP 0x20
355 #define MDB_REVERSEDUP 0x40
357 #define MDB_CREATE 0x40000
364 #define MDB_NOOVERWRITE 0x10
369 #define MDB_NODUPDATA 0x20
371 #define MDB_CURRENT 0x40
375 #define MDB_RESERVE 0x10000
377 #define MDB_APPEND 0x20000
379 #define MDB_APPENDDUP 0x40000
381 #define MDB_MULTIPLE 0x80000
390 #define MDB_CP_COMPACT 0x01
435 #define MDB_SUCCESS 0
437 #define MDB_KEYEXIST (-30799)
439 #define MDB_NOTFOUND (-30798)
441 #define MDB_PAGE_NOTFOUND (-30797)
443 #define MDB_CORRUPTED (-30796)
445 #define MDB_PANIC (-30795)
447 #define MDB_VERSION_MISMATCH (-30794)
449 #define MDB_INVALID (-30793)
451 #define MDB_MAP_FULL (-30792)
453 #define MDB_DBS_FULL (-30791)
455 #define MDB_READERS_FULL (-30790)
457 #define MDB_TLS_FULL (-30789)
459 #define MDB_TXN_FULL (-30788)
461 #define MDB_CURSOR_FULL (-30787)
463 #define MDB_PAGE_FULL (-30786)
465 #define MDB_MAP_RESIZED (-30785)
474 #define MDB_INCOMPATIBLE (-30784)
476 #define MDB_BAD_RSLOT (-30783)
478 #define MDB_BAD_TXN (-30782)
480 #define MDB_BAD_VALSIZE (-30781)
482 #define MDB_BAD_DBI (-30780)
484 #define MDB_PROBLEM (-30779)
486 #define MDB_LAST_ERRCODE MDB_PROBLEM
517 char *
mdb_version(
int *major,
int *minor,
int *patch);
1100 #define mdb_open(txn,name,flags,dbi) mdb_dbi_open(txn,name,flags,dbi)
1102 #define mdb_close(env,dbi) mdb_dbi_close(env,dbi)
1383 unsigned int flags);
1553 unsigned int flags);
int mdb_env_stat(MDB_env *env, MDB_stat *stat)
Return statistics about the LMDB environment.
Definition: mdb.c:10694
MDB_env * mdb_txn_env(MDB_txn *txn)
Returns the transaction's MDB_env.
Definition: mdb.c:3262
void() MDB_rel_func(MDB_val *item, void *oldptr, void *newptr, void *relctx)
A callback function used to relocate a position-dependent data item in a fixed-address database.
Definition: lmdb.h:308
int mdb_drop(MDB_txn *txn, MDB_dbi dbi, int del)
Empty or delete+close a database.
Definition: mdb.c:11016
void mdb_env_close(MDB_env *env)
Close the environment and release the memory map.
Definition: mdb.c:5824
MDB_dbi mdb_cursor_dbi(MDB_cursor *cursor)
Return the cursor's database handle.
Definition: mdb.c:8760
int mdb_env_get_path(MDB_env *env, const char **path)
Return the path that was used in mdb_env_open().
Definition: mdb.c:10655
int mdb_env_get_maxkeysize(MDB_env *env)
Get the maximum size of keys and MDB_DUPSORT data we can write.
Definition: mdb.c:11104
mdb_size_t ms_branch_pages
Definition: lmdb.h:494
mdb_size_t ms_overflow_pages
Definition: lmdb.h:496
void * mdb_env_get_userctx(MDB_env *env)
Get the application information associated with the MDB_env.
Definition: mdb.c:10638
int mdb_reader_list(MDB_env *env, MDB_msg_func *func, void *ctx)
Dump the entries in the reader lock table.
Definition: mdb.c:11110
MDB_cursor_op
Cursor Get operations.
Definition: lmdb.h:398
int mdb_dcmp(MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b)
Compare two data items according to a particular database.
Definition: mdb.c:1987
int mdb_cursor_open(MDB_txn *txn, MDB_dbi dbi, MDB_cursor **cursor)
Create a cursor handle.
Definition: mdb.c:8643
int mdb_dbi_open(MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *dbi)
Open a database in the environment.
Definition: mdb.c:10748
void mdb_dbi_close(MDB_env *env, MDB_dbi dbi)
Close a database handle. Normally unnecessary. Use with care:
Definition: mdb.c:10885
int mdb_txn_begin(MDB_env *env, MDB_txn *parent, unsigned int flags, MDB_txn **txn)
Create a transaction for use with the environment.
Definition: mdb.c:3143
int mdb_env_info(MDB_env *env, MDB_envinfo *stat)
Return information about the LMDB environment.
Definition: mdb.c:10707
int() MDB_cmp_func(const MDB_val *a, const MDB_val *b)
A callback function used to compare two keys in a database.
Definition: lmdb.h:292
int mdb_env_set_mapsize(MDB_env *env, mdb_size_t size)
Set the size of the memory map to use for this environment.
Definition: mdb.c:4559
int mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode)
Open an environment handle.
Definition: mdb.c:5528
int mdb_set_relfunc(MDB_txn *txn, MDB_dbi dbi, MDB_rel_func *rel)
Set a relocation function for a MDB_FIXEDMAP database.
Definition: mdb.c:11085
Opaque structure for a database environment.
Definition: mdb.c:1463
size_t mv_size
Definition: lmdb.h:287
int mdb_stat(MDB_txn *txn, MDB_dbi dbi, MDB_stat *stat)
Retrieve statistics for a database.
Definition: mdb.c:10868
int mdb_env_set_assert(MDB_env *env, MDB_assert_func *func)
Definition: mdb.c:10644
void mdb_txn_abort(MDB_txn *txn)
Abandon all the operations of the transaction instead of saving them.
Definition: mdb.c:3417
unsigned int me_numreaders
Definition: lmdb.h:507
int mdb_cursor_del(MDB_cursor *cursor, unsigned int flags)
Delete current key/data pair.
Definition: mdb.c:8078
int mdb_env_create(MDB_env **env)
Create an LMDB environment handle.
Definition: mdb.c:4407
int mdb_cursor_renew(MDB_txn *txn, MDB_cursor *cursor)
Renew a cursor handle.
Definition: mdb.c:8677
void mdb_cursor_close(MDB_cursor *cursor)
Close a cursor handle.
Definition: mdb.c:8732
int mdb_cursor_put(MDB_cursor *cursor, MDB_val *key, MDB_val *data, unsigned int flags)
Store by cursor.
Definition: mdb.c:7551
int mdb_set_dupsort(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp)
Set a custom data comparison function for a MDB_DUPSORT database.
Definition: mdb.c:11076
void * mv_data
Definition: lmdb.h:288
int mdb_env_get_fd(MDB_env *env, mdb_filehandle_t *fd)
Return the filedescriptor for the given environment.
Definition: mdb.c:10665
int mdb_env_copy(MDB_env *env, const char *path)
Copy an LMDB environment to the specified path.
Definition: mdb.c:10601
int mdb_txn_commit(MDB_txn *txn)
Commit all the operations of a transaction into the database.
Definition: mdb.c:3891
int mdb_env_get_maxreaders(MDB_env *env, unsigned int *readers)
Get the maximum number of threads/reader slots for the environment.
Definition: mdb.c:4618
mdb_size_t me_last_pgno
Definition: lmdb.h:504
void MDB_assert_func(MDB_env *env, const char *msg)
A callback function for most LMDB assert() failures, called before printing the message and aborting.
Definition: lmdb.h:968
int mdb_env_copyfd(MDB_env *env, mdb_filehandle_t fd)
Copy an LMDB environment to the specified file descriptor.
void * me_mapaddr
Definition: lmdb.h:502
int mdb_env_get_flags(MDB_env *env, unsigned int *flags)
Get environment flags.
Definition: mdb.c:10619
Information about the environment.
Definition: lmdb.h:501
int mdb_env_set_maxdbs(MDB_env *env, MDB_dbi dbs)
Set the maximum number of named databases for the environment.
Definition: mdb.c:4600
int mdb_env_set_userctx(MDB_env *env, void *ctx)
Set application information associated with the MDB_env.
Definition: mdb.c:10629
mdb_size_t ms_entries
Definition: lmdb.h:497
char * mdb_strerror(int err)
Return a string describing a given error code.
Definition: mdb.c:1708
unsigned int MDB_dbi
A handle for an individual database in the DB environment.
Definition: lmdb.h:270
int mdb_put(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data, unsigned int flags)
Store items into a database.
Definition: mdb.c:10026
int mdb_cursor_count(MDB_cursor *cursor, mdb_size_t *countp)
Return count of duplicates for current key.
Definition: mdb.c:8694
int mdb_dbi_flags(MDB_txn *txn, MDB_dbi dbi, unsigned int *flags)
Retrieve the DB flags for a database handle.
Definition: mdb.c:10901
int() MDB_msg_func(const char *msg, void *ctx)
A callback function used to print a message from the library.
Definition: lmdb.h:1622
int mdb_set_relctx(MDB_txn *txn, MDB_dbi dbi, void *ctx)
Set a context pointer for a MDB_FIXEDMAP database's relocation function.
Definition: mdb.c:11094
mdb_size_t me_last_txnid
Definition: lmdb.h:505
int mdb_env_copyfd2(MDB_env *env, mdb_filehandle_t fd, unsigned int flags)
Copy an LMDB environment to the specified file descriptor, with options.
int mdb_cursor_get(MDB_cursor *cursor, MDB_val *key, MDB_val *data, MDB_cursor_op op)
Retrieve by cursor.
Definition: mdb.c:7330
Statistics for a database in the environment.
Definition: lmdb.h:490
Opaque structure for navigating through a database.
Definition: mdb.c:1374
int mdb_del(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data)
Delete items from a database.
Definition: mdb.c:9539
int mdb_get(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data)
Get items from a database.
Definition: mdb.c:6770
mdb_size_t mdb_txn_id(MDB_txn *txn)
Return the transaction's ID.
Definition: mdb.c:3269
Generic structure used for passing keys and data in and out of the database.
Definition: lmdb.h:286
unsigned int ms_psize
Definition: lmdb.h:491
int mdb_txn_renew(MDB_txn *txn)
Renew a read-only transaction.
Definition: mdb.c:3126
mdb_size_t me_mapsize
Definition: lmdb.h:503
Opaque structure for a transaction handle.
Definition: mdb.c:1256
char * mdb_version(int *major, int *minor, int *patch)
Return the LMDB library version information.
Definition: mdb.c:1674
void mdb_txn_reset(MDB_txn *txn)
Reset a read-only transaction.
Definition: mdb.c:3404
unsigned int me_maxreaders
Definition: lmdb.h:506
int mdb_env_set_maxreaders(MDB_env *env, unsigned int readers)
Set the maximum number of threads/reader slots for the environment.
Definition: mdb.c:4609
int mdb_reader_check(MDB_env *env, int *dead)
Check for stale entries in the reader lock table.
Definition: mdb.c:11188
MDB_txn * mdb_cursor_txn(MDB_cursor *cursor)
Return the cursor's transaction handle.
Definition: mdb.c:8753
unsigned int ms_depth
Definition: lmdb.h:493
int mdb_set_compare(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp)
Set a custom key comparison function for a database.
Definition: mdb.c:11067
int mdb_env_copy2(MDB_env *env, const char *path, unsigned int flags)
Copy an LMDB environment to the specified path, with options.
Definition: mdb.c:10581
int mdb_cmp(MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b)
Compare two data items according to a particular database.
Definition: mdb.c:1981
mdb_size_t ms_leaf_pages
Definition: lmdb.h:495
int mdb_env_set_flags(MDB_env *env, unsigned int flags, int onoff)
Set environment flags.
Definition: mdb.c:10607
int mdb_env_sync(MDB_env *env, int force)
Flush the data buffers to disk.
Definition: mdb.c:2847