mirror of
https://github.com/isar/libmdbx.git
synced 2025-01-04 17:14:12 +08:00
mdbx: alter mdbx_cursor_put() paths.
Change-Id: I1836f8237162ffa34ce432038131fb6171fb7104
This commit is contained in:
Leonid Yuriev
parent
9e92ea2372
commit
39d43a5b57
@ -9449,152 +9449,15 @@ int mdbx_cursor_put(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data,
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}
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}
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more:;
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more:;
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MDBX_node *leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
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if (mdbx_audit_enabled()) {
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olddata.iov_len = NODEDSZ(leaf);
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int err = mdbx_cursor_check(mc, false);
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olddata.iov_base = NODEDATA(leaf);
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if (unlikely(err != MDBX_SUCCESS))
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return err;
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/* DB has dups? */
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if (F_ISSET(mc->mc_db->md_flags, MDBX_DUPSORT)) {
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/* Prepare (sub-)page/sub-DB to accept the new item, if needed.
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* fp: old sub-page or a header faking it.
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* mp: new (sub-)page. offset: growth in page size.
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* xdata: node data with new page or DB. */
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unsigned i, offset = 0;
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MDBX_page *mp = fp = xdata.iov_base = env->me_pbuf;
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mp->mp_pgno = mc->mc_pg[mc->mc_top]->mp_pgno;
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/* Was a single item before, must convert now */
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if (!F_ISSET(leaf->mn_flags, F_DUPDATA)) {
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/* does data match? */
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if (!mc->mc_dbx->md_dcmp(data, &olddata)) {
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if (unlikely(flags & (MDBX_NODUPDATA | MDBX_APPENDDUP)))
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return MDBX_KEYEXIST;
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/* overwrite it */
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goto current;
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}
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/* Just overwrite the current item */
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if (flags & MDBX_CURRENT)
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goto current;
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/* Back up original data item */
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dupdata_flag = 1;
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dkey.iov_len = olddata.iov_len;
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dkey.iov_base = memcpy(fp + 1, olddata.iov_base, olddata.iov_len);
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/* Make sub-page header for the dup items, with dummy body */
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fp->mp_flags = P_LEAF | P_DIRTY | P_SUBP;
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fp->mp_lower = 0;
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xdata.iov_len = PAGEHDRSZ + dkey.iov_len + data->iov_len;
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if (mc->mc_db->md_flags & MDBX_DUPFIXED) {
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fp->mp_flags |= P_LEAF2;
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fp->mp_leaf2_ksize = (uint16_t)data->iov_len;
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xdata.iov_len += 2 * data->iov_len; /* leave space for 2 more */
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mdbx_cassert(mc, xdata.iov_len <= env->me_psize);
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} else {
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xdata.iov_len += 2 * (sizeof(indx_t) + NODESIZE) +
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(dkey.iov_len & 1) + (data->iov_len & 1);
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mdbx_cassert(mc, xdata.iov_len <= env->me_psize);
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}
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fp->mp_upper = (uint16_t)(xdata.iov_len - PAGEHDRSZ);
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olddata.iov_len = xdata.iov_len; /* pretend olddata is fp */
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} else if (leaf->mn_flags & F_SUBDATA) {
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/* Data is on sub-DB, just store it */
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flags |= F_DUPDATA | F_SUBDATA;
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goto put_sub;
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} else {
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/* Data is on sub-page */
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fp = olddata.iov_base;
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switch (flags) {
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default:
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if (!(mc->mc_db->md_flags & MDBX_DUPFIXED)) {
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offset = EVEN(NODESIZE + sizeof(indx_t) + data->iov_len);
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break;
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}
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offset = fp->mp_leaf2_ksize;
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if (SIZELEFT(fp) < offset) {
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offset *= 4; /* space for 4 more */
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break;
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}
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/* FALLTHRU: Big enough MDBX_DUPFIXED sub-page */
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__fallthrough;
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case MDBX_CURRENT | MDBX_NODUPDATA:
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case MDBX_CURRENT:
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fp->mp_flags |= P_DIRTY;
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fp->mp_pgno = mp->mp_pgno;
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mc->mc_xcursor->mx_cursor.mc_pg[0] = fp;
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flags |= F_DUPDATA;
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goto put_sub;
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}
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xdata.iov_len = olddata.iov_len + offset;
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}
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fp_flags = fp->mp_flags;
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if (NODESIZE + NODEKSZ(leaf) + xdata.iov_len > env->me_nodemax) {
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/* Too big for a sub-page, convert to sub-DB */
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fp_flags &= ~P_SUBP;
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prep_subDB:
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dummy.md_xsize = 0;
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dummy.md_flags = 0;
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if (mc->mc_db->md_flags & MDBX_DUPFIXED) {
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fp_flags |= P_LEAF2;
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dummy.md_xsize = fp->mp_leaf2_ksize;
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dummy.md_flags = MDBX_DUPFIXED;
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if (mc->mc_db->md_flags & MDBX_INTEGERDUP)
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dummy.md_flags |= MDBX_INTEGERKEY;
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}
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dummy.md_depth = 1;
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dummy.md_branch_pages = 0;
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dummy.md_leaf_pages = 1;
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dummy.md_overflow_pages = 0;
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dummy.md_entries = NUMKEYS(fp);
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xdata.iov_len = sizeof(MDBX_db);
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xdata.iov_base = &dummy;
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if ((rc = mdbx_page_alloc(mc, 1, &mp, MDBX_ALLOC_ALL)))
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return rc;
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mc->mc_db->md_leaf_pages += 1;
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mdbx_cassert(mc, env->me_psize > olddata.iov_len);
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offset = env->me_psize - (unsigned)olddata.iov_len;
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flags |= F_DUPDATA | F_SUBDATA;
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dummy.md_root = mp->mp_pgno;
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dummy.md_seq = dummy.md_merkle = 0;
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sub_root = mp;
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}
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if (mp != fp) {
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mp->mp_flags = fp_flags | P_DIRTY;
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mp->mp_leaf2_ksize = fp->mp_leaf2_ksize;
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mp->mp_lower = fp->mp_lower;
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mdbx_cassert(mc, fp->mp_upper + offset <= UINT16_MAX);
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mp->mp_upper = (indx_t)(fp->mp_upper + offset);
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if (unlikely(fp_flags & P_LEAF2)) {
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memcpy(PAGEDATA(mp), PAGEDATA(fp), NUMKEYS(fp) * fp->mp_leaf2_ksize);
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} else {
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memcpy((char *)mp + mp->mp_upper + PAGEHDRSZ,
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(char *)fp + fp->mp_upper + PAGEHDRSZ,
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olddata.iov_len - fp->mp_upper - PAGEHDRSZ);
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memcpy((char *)(&mp->mp_ptrs), (char *)(&fp->mp_ptrs),
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NUMKEYS(fp) * sizeof(mp->mp_ptrs[0]));
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for (i = 0; i < NUMKEYS(fp); i++) {
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mdbx_cassert(mc, mp->mp_ptrs[i] + offset <= UINT16_MAX);
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mp->mp_ptrs[i] += (indx_t)offset;
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}
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}
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}
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rdata = &xdata;
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flags |= F_DUPDATA;
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do_sub = true;
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if (!insert_key)
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mdbx_node_del(mc, 0);
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goto new_sub;
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}
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}
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current:
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MDBX_node *leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
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/* MDBX passes F_SUBDATA in 'flags' to write a DB record */
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if (unlikely((leaf->mn_flags ^ flags) & F_SUBDATA))
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return MDBX_INCOMPATIBLE;
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/* overflow page overwrites need special handling */
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/* overflow page overwrites need special handling */
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if (F_ISSET(leaf->mn_flags, F_BIGDATA)) {
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if (unlikely(F_ISSET(leaf->mn_flags, F_BIGDATA))) {
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MDBX_page *omp;
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MDBX_page *omp;
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pgno_t pg;
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pgno_t pg;
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int level, ovpages,
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int level, ovpages,
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@ -9602,7 +9465,7 @@ int mdbx_cursor_put(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data,
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? OVPAGES(env, data->iov_len)
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? OVPAGES(env, data->iov_len)
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: 0;
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: 0;
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memcpy(&pg, olddata.iov_base, sizeof(pg));
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memcpy(&pg, NODEDATA(leaf), sizeof(pg));
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if (unlikely((rc2 = mdbx_page_get(mc, pg, &omp, &level)) != 0))
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if (unlikely((rc2 = mdbx_page_get(mc, pg, &omp, &level)) != 0))
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return rc2;
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return rc2;
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ovpages = omp->mp_pages;
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ovpages = omp->mp_pages;
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@ -9667,34 +9530,184 @@ int mdbx_cursor_put(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data,
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}
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}
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if ((rc2 = mdbx_ovpage_free(mc, omp)) != MDBX_SUCCESS)
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if ((rc2 = mdbx_ovpage_free(mc, omp)) != MDBX_SUCCESS)
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return rc2;
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return rc2;
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} else if (data->iov_len == olddata.iov_len) {
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} else {
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mdbx_cassert(mc, EVEN(key->iov_len) == EVEN(leaf->mn_ksize));
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olddata.iov_len = NODEDSZ(leaf);
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/* same size, just replace it. Note that we could
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olddata.iov_base = NODEDATA(leaf);
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* also reuse this node if the new data is smaller,
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mdbx_cassert(mc, (char *)olddata.iov_base + olddata.iov_len <=
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* but instead we opt to shrink the node in that case. */
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(char *)(mc->mc_pg[mc->mc_top]) + env->me_psize);
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if (F_ISSET(flags, MDBX_RESERVE))
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data->iov_base = olddata.iov_base;
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/* DB has dups? */
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else if (!(mc->mc_flags & C_SUB))
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if (F_ISSET(mc->mc_db->md_flags, MDBX_DUPSORT)) {
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memcpy(olddata.iov_base, data->iov_base, data->iov_len);
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/* Prepare (sub-)page/sub-DB to accept the new item, if needed.
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else {
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* fp: old sub-page or a header faking it.
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mdbx_cassert(mc, NUMKEYS(mc->mc_pg[mc->mc_top]) == 1);
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* mp: new (sub-)page. offset: growth in page size.
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mdbx_cassert(mc, PAGETYPE(mc->mc_pg[mc->mc_top]) == P_LEAF);
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* xdata: node data with new page or DB. */
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mdbx_cassert(mc, NODEDSZ(leaf) == 0);
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unsigned i, offset = 0;
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mdbx_cassert(mc, leaf->mn_flags == 0);
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MDBX_page *mp = fp = xdata.iov_base = env->me_pbuf;
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mdbx_cassert(mc, key->iov_len < UINT16_MAX);
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mp->mp_pgno = mc->mc_pg[mc->mc_top]->mp_pgno;
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leaf->mn_ksize = (uint16_t)key->iov_len;
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memcpy(NODEKEY(leaf), key->iov_base, key->iov_len);
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/* Was a single item before, must convert now */
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mdbx_cassert(mc, (char *)NODEKEY(leaf) + NODEDSZ(leaf) <
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if (!F_ISSET(leaf->mn_flags, F_DUPDATA)) {
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(char *)(mc->mc_pg[mc->mc_top]) + env->me_psize);
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goto fix_parent;
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/* does data match? */
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if (!mc->mc_dbx->md_dcmp(data, &olddata)) {
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if (unlikely(flags & (MDBX_NODUPDATA | MDBX_APPENDDUP)))
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return MDBX_KEYEXIST;
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/* overwrite it */
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goto current;
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}
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/* Just overwrite the current item */
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if (flags & MDBX_CURRENT)
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goto current;
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/* Back up original data item */
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dupdata_flag = 1;
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dkey.iov_len = olddata.iov_len;
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dkey.iov_base = memcpy(fp + 1, olddata.iov_base, olddata.iov_len);
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/* Make sub-page header for the dup items, with dummy body */
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fp->mp_flags = P_LEAF | P_DIRTY | P_SUBP;
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fp->mp_lower = 0;
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xdata.iov_len = PAGEHDRSZ + dkey.iov_len + data->iov_len;
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if (mc->mc_db->md_flags & MDBX_DUPFIXED) {
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fp->mp_flags |= P_LEAF2;
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fp->mp_leaf2_ksize = (uint16_t)data->iov_len;
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xdata.iov_len += 2 * data->iov_len; /* leave space for 2 more */
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mdbx_cassert(mc, xdata.iov_len <= env->me_psize);
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} else {
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xdata.iov_len += 2 * (sizeof(indx_t) + NODESIZE) +
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(dkey.iov_len & 1) + (data->iov_len & 1);
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mdbx_cassert(mc, xdata.iov_len <= env->me_psize);
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}
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fp->mp_upper = (uint16_t)(xdata.iov_len - PAGEHDRSZ);
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olddata.iov_len = xdata.iov_len; /* pretend olddata is fp */
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} else if (leaf->mn_flags & F_SUBDATA) {
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/* Data is on sub-DB, just store it */
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flags |= F_DUPDATA | F_SUBDATA;
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goto put_sub;
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} else {
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/* Data is on sub-page */
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fp = olddata.iov_base;
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switch (flags) {
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default:
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if (!(mc->mc_db->md_flags & MDBX_DUPFIXED)) {
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offset = EVEN(NODESIZE + sizeof(indx_t) + data->iov_len);
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break;
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}
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offset = fp->mp_leaf2_ksize;
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if (SIZELEFT(fp) < offset) {
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offset *= 4; /* space for 4 more */
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break;
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}
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/* FALLTHRU: Big enough MDBX_DUPFIXED sub-page */
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__fallthrough;
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case MDBX_CURRENT | MDBX_NODUPDATA:
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case MDBX_CURRENT:
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fp->mp_flags |= P_DIRTY;
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fp->mp_pgno = mp->mp_pgno;
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mc->mc_xcursor->mx_cursor.mc_pg[0] = fp;
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flags |= F_DUPDATA;
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goto put_sub;
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}
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xdata.iov_len = olddata.iov_len + offset;
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}
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fp_flags = fp->mp_flags;
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if (NODESIZE + NODEKSZ(leaf) + xdata.iov_len > env->me_nodemax) {
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/* Too big for a sub-page, convert to sub-DB */
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fp_flags &= ~P_SUBP;
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prep_subDB:
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dummy.md_xsize = 0;
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dummy.md_flags = 0;
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if (mc->mc_db->md_flags & MDBX_DUPFIXED) {
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fp_flags |= P_LEAF2;
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dummy.md_xsize = fp->mp_leaf2_ksize;
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dummy.md_flags = MDBX_DUPFIXED;
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if (mc->mc_db->md_flags & MDBX_INTEGERDUP)
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dummy.md_flags |= MDBX_INTEGERKEY;
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}
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dummy.md_depth = 1;
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dummy.md_branch_pages = 0;
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dummy.md_leaf_pages = 1;
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dummy.md_overflow_pages = 0;
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dummy.md_entries = NUMKEYS(fp);
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xdata.iov_len = sizeof(MDBX_db);
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xdata.iov_base = &dummy;
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if ((rc = mdbx_page_alloc(mc, 1, &mp, MDBX_ALLOC_ALL)))
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return rc;
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mc->mc_db->md_leaf_pages += 1;
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mdbx_cassert(mc, env->me_psize > olddata.iov_len);
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offset = env->me_psize - (unsigned)olddata.iov_len;
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flags |= F_DUPDATA | F_SUBDATA;
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dummy.md_root = mp->mp_pgno;
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dummy.md_seq = dummy.md_merkle = 0;
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sub_root = mp;
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}
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if (mp != fp) {
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mp->mp_flags = fp_flags | P_DIRTY;
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mp->mp_leaf2_ksize = fp->mp_leaf2_ksize;
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mp->mp_lower = fp->mp_lower;
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mdbx_cassert(mc, fp->mp_upper + offset <= UINT16_MAX);
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mp->mp_upper = (indx_t)(fp->mp_upper + offset);
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if (unlikely(fp_flags & P_LEAF2)) {
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memcpy(PAGEDATA(mp), PAGEDATA(fp),
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NUMKEYS(fp) * fp->mp_leaf2_ksize);
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} else {
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||||||
|
memcpy((char *)mp + mp->mp_upper + PAGEHDRSZ,
|
||||||
|
(char *)fp + fp->mp_upper + PAGEHDRSZ,
|
||||||
|
olddata.iov_len - fp->mp_upper - PAGEHDRSZ);
|
||||||
|
memcpy((char *)(&mp->mp_ptrs), (char *)(&fp->mp_ptrs),
|
||||||
|
NUMKEYS(fp) * sizeof(mp->mp_ptrs[0]));
|
||||||
|
for (i = 0; i < NUMKEYS(fp); i++) {
|
||||||
|
mdbx_cassert(mc, mp->mp_ptrs[i] + offset <= UINT16_MAX);
|
||||||
|
mp->mp_ptrs[i] += (indx_t)offset;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
rdata = &xdata;
|
||||||
|
flags |= F_DUPDATA;
|
||||||
|
do_sub = true;
|
||||||
|
if (!insert_key)
|
||||||
|
mdbx_node_del(mc, 0);
|
||||||
|
goto new_sub;
|
||||||
}
|
}
|
||||||
|
|
||||||
if (mdbx_audit_enabled()) {
|
/* MDBX passes F_SUBDATA in 'flags' to write a DB record */
|
||||||
int err = mdbx_cursor_check(mc, false);
|
if (unlikely((leaf->mn_flags ^ flags) & F_SUBDATA))
|
||||||
if (unlikely(err != MDBX_SUCCESS))
|
return MDBX_INCOMPATIBLE;
|
||||||
return err;
|
|
||||||
|
current:
|
||||||
|
if (data->iov_len == olddata.iov_len) {
|
||||||
|
mdbx_cassert(mc, EVEN(key->iov_len) == EVEN(leaf->mn_ksize));
|
||||||
|
/* same size, just replace it. Note that we could
|
||||||
|
* also reuse this node if the new data is smaller,
|
||||||
|
* but instead we opt to shrink the node in that case. */
|
||||||
|
if (F_ISSET(flags, MDBX_RESERVE))
|
||||||
|
data->iov_base = olddata.iov_base;
|
||||||
|
else if (!(mc->mc_flags & C_SUB))
|
||||||
|
memcpy(olddata.iov_base, data->iov_base, data->iov_len);
|
||||||
|
else {
|
||||||
|
mdbx_cassert(mc, NUMKEYS(mc->mc_pg[mc->mc_top]) == 1);
|
||||||
|
mdbx_cassert(mc, PAGETYPE(mc->mc_pg[mc->mc_top]) == P_LEAF);
|
||||||
|
mdbx_cassert(mc, NODEDSZ(leaf) == 0);
|
||||||
|
mdbx_cassert(mc, leaf->mn_flags == 0);
|
||||||
|
mdbx_cassert(mc, key->iov_len < UINT16_MAX);
|
||||||
|
leaf->mn_ksize = (uint16_t)key->iov_len;
|
||||||
|
memcpy(NODEKEY(leaf), key->iov_base, key->iov_len);
|
||||||
|
mdbx_cassert(mc, (char *)NODEKEY(leaf) + NODEDSZ(leaf) <
|
||||||
|
(char *)(mc->mc_pg[mc->mc_top]) + env->me_psize);
|
||||||
|
goto fix_parent;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (mdbx_audit_enabled()) {
|
||||||
|
int err = mdbx_cursor_check(mc, false);
|
||||||
|
if (unlikely(err != MDBX_SUCCESS))
|
||||||
|
return err;
|
||||||
|
}
|
||||||
|
return MDBX_SUCCESS;
|
||||||
}
|
}
|
||||||
return MDBX_SUCCESS;
|
|
||||||
}
|
}
|
||||||
mdbx_node_del(mc, 0);
|
mdbx_node_del(mc, 0);
|
||||||
}
|
}
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user