lmdb.h

Go to the documentation of this file.

#ifndef _LMDB_H_
#define _LMDB_H_

#include <sys/types.h>

#ifdef __cplusplus
extern "C" {
#endif

#ifdef _MSC_VER
typedef int mdb_mode_t;
#else
typedef mode_t  mdb_mode_t;
#endif

#ifdef _WIN32
typedef void *mdb_filehandle_t;
#else
typedef int mdb_filehandle_t;
#endif

#define MDB_VERSION_MAJOR   0

#define MDB_VERSION_MINOR   9

#define MDB_VERSION_PATCH   16

#define MDB_VERINT(a,b,c)   (((a) << 24) | ((b) << 16) | (c))

#define MDB_VERSION_FULL    \
    MDB_VERINT(MDB_VERSION_MAJOR,MDB_VERSION_MINOR,MDB_VERSION_PATCH)

#define MDB_VERSION_DATE    "August 14, 2015"

#define MDB_VERSTR(a,b,c,d) "LMDB " #a "." #b "." #c ": (" d ")"

#define MDB_VERFOO(a,b,c,d) MDB_VERSTR(a,b,c,d)

#define MDB_VERSION_STRING  \
    MDB_VERFOO(MDB_VERSION_MAJOR,MDB_VERSION_MINOR,MDB_VERSION_PATCH,MDB_VERSION_DATE)

typedef struct MDB_env MDB_env;

typedef struct MDB_txn MDB_txn;

typedef unsigned int    MDB_dbi;

typedef struct MDB_cursor MDB_cursor;

typedef struct MDB_val {
    size_t       mv_size;   
    void        *mv_data;   
} MDB_val;

typedef int  (MDB_cmp_func)(const MDB_val *a, const MDB_val *b);

typedef void (MDB_rel_func)(MDB_val *item, void *oldptr, void *newptr, void *relctx);

#define MDB_FIXEDMAP    0x01

#define MDB_NOSUBDIR    0x4000

#define MDB_NOSYNC      0x10000

#define MDB_RDONLY      0x20000

#define MDB_NOMETASYNC      0x40000

#define MDB_WRITEMAP        0x80000

#define MDB_MAPASYNC        0x100000

#define MDB_NOTLS       0x200000

#define MDB_NOLOCK      0x400000

#define MDB_NORDAHEAD   0x800000

#define MDB_NOMEMINIT   0x1000000

#define MDB_REVERSEKEY  0x02

#define MDB_DUPSORT     0x04

#define MDB_INTEGERKEY  0x08

#define MDB_DUPFIXED    0x10

#define MDB_INTEGERDUP  0x20

#define MDB_REVERSEDUP  0x40

#define MDB_CREATE      0x40000

#define MDB_NOOVERWRITE 0x10

#define MDB_NODUPDATA   0x20

#define MDB_CURRENT 0x40

#define MDB_RESERVE 0x10000

#define MDB_APPEND  0x20000

#define MDB_APPENDDUP   0x40000

#define MDB_MULTIPLE    0x80000
/*  @} */

#define MDB_CP_COMPACT  0x01
/*  @} */

typedef enum MDB_cursor_op {
    MDB_FIRST,              
    MDB_FIRST_DUP,          
    MDB_GET_BOTH,           
    MDB_GET_BOTH_RANGE,     
    MDB_GET_CURRENT,        
    MDB_GET_MULTIPLE,       
    MDB_LAST,               
    MDB_LAST_DUP,           
    MDB_NEXT,               
    MDB_NEXT_DUP,           
    MDB_NEXT_MULTIPLE,      
    MDB_NEXT_NODUP,         
    MDB_PREV,               
    MDB_PREV_DUP,           
    MDB_PREV_NODUP,         
    MDB_SET,                
    MDB_SET_KEY,            
    MDB_SET_RANGE           
} MDB_cursor_op;

#define MDB_SUCCESS  0

#define MDB_KEYEXIST    (-30799)

#define MDB_NOTFOUND    (-30798)

#define MDB_PAGE_NOTFOUND   (-30797)

#define MDB_CORRUPTED   (-30796)

#define MDB_PANIC       (-30795)

#define MDB_VERSION_MISMATCH    (-30794)

#define MDB_INVALID (-30793)

#define MDB_MAP_FULL    (-30792)

#define MDB_DBS_FULL    (-30791)

#define MDB_READERS_FULL    (-30790)

#define MDB_TLS_FULL    (-30789)

#define MDB_TXN_FULL    (-30788)

#define MDB_CURSOR_FULL (-30787)

#define MDB_PAGE_FULL   (-30786)

#define MDB_MAP_RESIZED (-30785)

#define MDB_INCOMPATIBLE    (-30784)

#define MDB_BAD_RSLOT       (-30783)

#define MDB_BAD_TXN         (-30782)

#define MDB_BAD_VALSIZE     (-30781)

#define MDB_BAD_DBI     (-30780)

#define MDB_LAST_ERRCODE    MDB_BAD_DBI

typedef struct MDB_stat {
    unsigned int    ms_psize;           
    unsigned int    ms_depth;           
    size_t      ms_branch_pages;    
    size_t      ms_leaf_pages;      
    size_t      ms_overflow_pages;  
    size_t      ms_entries;         
} MDB_stat;

typedef struct MDB_envinfo {
    void    *me_mapaddr;            
    size_t  me_mapsize;             
    size_t  me_last_pgno;           
    size_t  me_last_txnid;          
    unsigned int me_maxreaders;     
    unsigned int me_numreaders;     
} MDB_envinfo;

char *mdb_version(int *major, int *minor, int *patch);

char *mdb_strerror(int err);

int  mdb_env_create(MDB_env **env);

int  mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode);

int  mdb_env_copy(MDB_env *env, const char *path);

int  mdb_env_copyfd(MDB_env *env, mdb_filehandle_t fd);

int  mdb_env_copy2(MDB_env *env, const char *path, unsigned int flags);

int  mdb_env_copyfd2(MDB_env *env, mdb_filehandle_t fd, unsigned int flags);

int  mdb_env_stat(MDB_env *env, MDB_stat *stat);

int  mdb_env_info(MDB_env *env, MDB_envinfo *stat);

int  mdb_env_sync(MDB_env *env, int force);

void mdb_env_close(MDB_env *env);

int  mdb_env_set_flags(MDB_env *env, unsigned int flags, int onoff);

int  mdb_env_get_flags(MDB_env *env, unsigned int *flags);

int  mdb_env_get_path(MDB_env *env, const char **path);

int  mdb_env_get_fd(MDB_env *env, mdb_filehandle_t *fd);

int  mdb_env_set_mapsize(MDB_env *env, size_t size);

int  mdb_env_set_maxreaders(MDB_env *env, unsigned int readers);

int  mdb_env_get_maxreaders(MDB_env *env, unsigned int *readers);

int  mdb_env_set_maxdbs(MDB_env *env, MDB_dbi dbs);

int  mdb_env_get_maxkeysize(MDB_env *env);

int  mdb_env_set_userctx(MDB_env *env, void *ctx);

void *mdb_env_get_userctx(MDB_env *env);

typedef void MDB_assert_func(MDB_env *env, const char *msg);

int  mdb_env_set_assert(MDB_env *env, MDB_assert_func *func);

int  mdb_txn_begin(MDB_env *env, MDB_txn *parent, unsigned int flags, MDB_txn **txn);

MDB_env *mdb_txn_env(MDB_txn *txn);

int  mdb_txn_commit(MDB_txn *txn);

void mdb_txn_abort(MDB_txn *txn);

void mdb_txn_reset(MDB_txn *txn);

int  mdb_txn_renew(MDB_txn *txn);

#define mdb_open(txn,name,flags,dbi)    mdb_dbi_open(txn,name,flags,dbi)

#define mdb_close(env,dbi)              mdb_dbi_close(env,dbi)

int  mdb_dbi_open(MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *dbi);

int  mdb_stat(MDB_txn *txn, MDB_dbi dbi, MDB_stat *stat);

int mdb_dbi_flags(MDB_txn *txn, MDB_dbi dbi, unsigned int *flags);

void mdb_dbi_close(MDB_env *env, MDB_dbi dbi);

int  mdb_drop(MDB_txn *txn, MDB_dbi dbi, int del);

int  mdb_set_compare(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp);

int  mdb_set_dupsort(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp);

int  mdb_set_relfunc(MDB_txn *txn, MDB_dbi dbi, MDB_rel_func *rel);

int  mdb_set_relctx(MDB_txn *txn, MDB_dbi dbi, void *ctx);

int  mdb_get(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data);

int  mdb_put(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data,
                unsigned int flags);

int  mdb_del(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data);

int  mdb_cursor_open(MDB_txn *txn, MDB_dbi dbi, MDB_cursor **cursor);

void mdb_cursor_close(MDB_cursor *cursor);

int  mdb_cursor_renew(MDB_txn *txn, MDB_cursor *cursor);

MDB_txn *mdb_cursor_txn(MDB_cursor *cursor);

MDB_dbi mdb_cursor_dbi(MDB_cursor *cursor);

int  mdb_cursor_get(MDB_cursor *cursor, MDB_val *key, MDB_val *data,
                MDB_cursor_op op);

int  mdb_cursor_put(MDB_cursor *cursor, MDB_val *key, MDB_val *data,
                unsigned int flags);

int  mdb_cursor_del(MDB_cursor *cursor, unsigned int flags);

int  mdb_cursor_count(MDB_cursor *cursor, size_t *countp);

int  mdb_cmp(MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b);

int  mdb_dcmp(MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b);

typedef int (MDB_msg_func)(const char *msg, void *ctx);

int mdb_reader_list(MDB_env *env, MDB_msg_func *func, void *ctx);

int mdb_reader_check(MDB_env *env, int *dead);
#ifdef __cplusplus
}
#endif

#endif /* _LMDB_H_ */