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89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
#ifndef _MDB_H_
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#define _MDB_H_
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#include <sys/types.h>
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struct MDB_cursor;
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struct MDB_txn;
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struct MDB_db;
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struct MDB_env;
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typedef struct MDB_cursor MDB_cursor;
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typedef struct MDB_txn MDB_txn;
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typedef struct MDB_db MDB_db;
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typedef struct MDB_env MDB_env;
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typedef struct MDB_val {
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void *mv_data;
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size_t mv_size;
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} MDB_val;
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typedef int (MDB_cmp_func)(const MDB_val *a, const MDB_val *b);
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typedef void (MDB_rel_func)(void *ptr, void *oldptr);
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#define MDB_NOOVERWRITE 1
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typedef enum MDB_cursor_op { /* cursor operations */
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MDB_CURSOR, /* position at given key */
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MDB_CURSOR_EXACT, /* position at key, or fail */
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MDB_FIRST,
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MDB_NEXT,
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MDB_LAST, /* not implemented */
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MDB_PREV /* not implemented */
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} MDB_cursor_op;
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/* return codes */
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#define MDB_FAIL -1
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#define MDB_SUCCESS 0
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/* DB flags */
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#define MDB_REVERSEKEY 0x02 /* use reverse string keys */
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#define MDB_NOSYNC 0x10000 /* don't fsync after commit */
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#define MDB_RDONLY 0x20000 /* read only */
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/* environment flags */
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#define MDB_FIXEDMAP 0x01 /* mmap at a fixed address */
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typedef struct MDB_stat {
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unsigned int ms_psize;
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unsigned int ms_depth;
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unsigned long ms_branch_pages;
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unsigned long ms_leaf_pages;
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unsigned long ms_overflow_pages;
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unsigned long ms_entries;
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} MDB_stat;
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int mdbenv_create(MDB_env **env);
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int mdbenv_open(MDB_env *env, const char *path, unsigned int flags, mode_t mode);
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int mdbenv_stat(MDB_env *env, MDB_stat **stat);
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void mdbenv_close(MDB_env *env);
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int mdbenv_get_flags(MDB_env *env, unsigned int *flags);
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int mdbenv_get_path(MDB_env *env, const char **path);
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int mdbenv_set_mapsize(MDB_env *env, size_t size);
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int mdbenv_set_maxreaders(MDB_env *env, int readers);
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int mdbenv_get_maxreaders(MDB_env *env, int *readers);
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int mdbenv_sync(MDB_env *env);
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int mdbenv_compact(MDB_env *env);
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int mdb_txn_begin(MDB_env *env, int rdonly, MDB_txn **txn);
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int mdb_txn_commit(MDB_txn *txn);
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void mdb_txn_abort(MDB_txn *txn);
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int mdb_open(MDB_env *env, MDB_txn *txn, const char *name, unsigned int flags, MDB_db **db);
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int mdb_stat(MDB_db *db, MDB_stat **stat);
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void mdb_close(MDB_db *db);
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int mdb_get(MDB_db *db, MDB_txn *txn, MDB_val *key, MDB_val *data);
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int mdb_put(MDB_db *db, MDB_txn *txn, MDB_val *key, MDB_val *data,
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unsigned int flags);
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int mdb_del(MDB_db *db, MDB_txn *txn, MDB_val *key, MDB_val *data);
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int mdb_cursor_open(MDB_db *db, MDB_txn *txn, MDB_cursor **cursor);
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void mdb_cursor_close(MDB_cursor *cursor);
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int mdb_cursor_get(MDB_cursor *cursor, MDB_val *key, MDB_val *data,
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MDB_cursor_op op);
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int mdb_cmp(MDB_db *db, const MDB_val *a, const MDB_val *b);
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#endif /* _MDB_H_ */
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