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mdbx: add mdbx_get2() for testing.

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Change-Id: Icd0961e464936fa2d24fd3ed87b61de038e955c2
This commit is contained in:
Leonid Yuriev 2018-09-17 10:35:06 +03:00
parent 940138fbda
commit 68fd9c9908
2 changed files with 37 additions and 0 deletions
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2
mdbx.h
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@ -1246,6 +1246,8 @@ LIBMDBX_API int mdbx_drop(MDBX_txn *txn, MDBX_dbi dbi, int del);
* - MDBX_EINVAL - an invalid parameter was specified. */
LIBMDBX_API int mdbx_get(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key,
MDBX_val *data);
LIBMDBX_API int mdbx_get2(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key,
MDBX_val *data);
/* Store items into a database.
*

35
src/mdbx.c
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@ -7153,6 +7153,41 @@ int mdbx_get(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, MDBX_val *data) {
return mdbx_cursor_set(&cx.outer, key, data, MDBX_SET, &exact);
}
int mdbx_get2(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, MDBX_val *data) {
int exact = 0;
DKBUF;
mdbx_debug("===> get db %u key [%s]", dbi, DKEY(key));
if (unlikely(!key || !data || !txn))
return MDBX_EINVAL;
if (unlikely(txn->mt_signature != MDBX_MT_SIGNATURE))
return MDBX_EBADSIGN;
if (unlikely(txn->mt_owner != mdbx_thread_self()))
return MDBX_THREAD_MISMATCH;
if (unlikely(!TXN_DBI_EXIST(txn, dbi, DB_USRVALID)))
return MDBX_EINVAL;
if (unlikely(txn->mt_flags & MDBX_TXN_BLOCKED))
return MDBX_BAD_TXN;
MDBX_cursor_couple cx;
int rc = mdbx_cursor_init(&cx.outer, txn, dbi);
if (unlikely(rc != MDBX_SUCCESS))
return rc;
const int op =
(txn->mt_dbs[dbi].md_flags & MDBX_DUPSORT) ? MDBX_GET_BOTH : MDBX_SET_KEY;
rc = mdbx_cursor_set(&cx.outer, key, data, op, &exact);
if (unlikely(rc != MDBX_SUCCESS))
return rc;
return exact ? MDBX_SUCCESS : MDBX_RESULT_TRUE;
}
/* Find a sibling for a page.
* Replaces the page at the top of the cursor's stack with the specified
* sibling, if one exists.