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mdbx: add mdbx_dbi_flags_ex().

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This commit is contained in:
Leo Yuriev 2017-06-09 16:35:41 +03:00
parent 3ca64535b6
commit 6f53dd0719
3 changed files with 22 additions and 8 deletions
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6
mdbx.h
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@ -1104,8 +1104,14 @@ LIBMDBX_API int mdbx_dbi_stat(MDBX_txn *txn, MDBX_dbi dbi, MDBX_stat *stat,
* [in] txn A transaction handle returned by mdbx_txn_begin()
* [in] dbi A database handle returned by mdbx_dbi_open()
* [out] flags Address where the flags will be returned.
* [out] state Address where the state will be returned.
*
* Returns A non-zero error value on failure and 0 on success. */
#define MDBX_TBL_DIRTY 0x01 /* DB was written in this txn */
#define MDBX_TBL_STALE 0x02 /* Named-DB record is older than txnID */
#define MDBX_TBL_NEW 0x04 /* Named-DB handle opened in this txn */
LIBMDBX_API int mdbx_dbi_flags_ex(MDBX_txn *txn, MDBX_dbi dbi, unsigned *flags,
unsigned *state);
LIBMDBX_API int mdbx_dbi_flags(MDBX_txn *txn, MDBX_dbi dbi, unsigned *flags);
/* Close a database handle. Normally unnecessary.

12
src/bits.h
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@ -488,12 +488,12 @@ struct MDBX_txn {
unsigned *mt_dbiseqs;
/* Transaction DB Flags */
#define DB_DIRTY 0x01 /* DB was written in this txn */
#define DB_STALE 0x02 /* Named-DB record is older than txnID */
#define DB_NEW 0x04 /* Named-DB handle opened in this txn */
#define DB_VALID 0x08 /* DB handle is valid, see also MDBX_VALID */
#define DB_USRVALID 0x10 /* As DB_VALID, but not set for FREE_DBI */
#define DB_DUPDATA 0x20 /* DB is MDBX_DUPSORT data */
#define DB_DIRTY MDBX_TBL_DIRTY /* DB was written in this txn */
#define DB_STALE MDBX_TBL_STALE /* Named-DB record is older than txnID */
#define DB_NEW MDBX_TBL_NEW /* Named-DB handle opened in this txn */
#define DB_VALID 0x08 /* DB handle is valid, see also MDBX_VALID */
#define DB_USRVALID 0x10 /* As DB_VALID, but not set for FREE_DBI */
#define DB_DUPDATA 0x20 /* DB is MDBX_DUPSORT data */
/* In write txns, array of cursors for each DB */
MDBX_cursor **mt_cursors;
/* Array of flags for each DB */

12
src/mdbx.c
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@ -9470,8 +9470,9 @@ int mdbx_dbi_close(MDBX_env *env, MDBX_dbi dbi) {
return rc;
}
int mdbx_dbi_flags(MDBX_txn *txn, MDBX_dbi dbi, unsigned *flags) {
if (unlikely(!txn || !flags))
int mdbx_dbi_flags_ex(MDBX_txn *txn, MDBX_dbi dbi, unsigned *flags,
unsigned *state) {
if (unlikely(!txn || !flags || !state))
return MDBX_EINVAL;
if (unlikely(txn->mt_signature != MDBX_MT_SIGNATURE))
@ -9484,9 +9485,16 @@ int mdbx_dbi_flags(MDBX_txn *txn, MDBX_dbi dbi, unsigned *flags) {
return MDBX_EINVAL;
*flags = txn->mt_dbs[dbi].md_flags & PERSISTENT_FLAGS;
*state = txn->mt_dbflags[dbi] & (DB_NEW | DB_DIRTY | DB_STALE);
return MDBX_SUCCESS;
}
int mdbx_dbi_flags(MDBX_txn *txn, MDBX_dbi dbi, unsigned *flags) {
unsigned state;
return mdbx_dbi_flags_ex(txn, dbi, flags, &state);
}
/* Add all the DB's pages to the free list.
* [in] mc Cursor on the DB to free.
* [in] subs non-Zero to check for sub-DBs in this DB.