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mdbx: добавление в API функций mdbx_limits_pairsize4page_max()
и mdbx_limits_valsize4page_max()
с сопутствующими доработками.
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143e3dfb77
commit
66f2e3d596
15
mdbx.h
15
mdbx.h
@ -3119,6 +3119,21 @@ mdbx_limits_keysize_max(intptr_t pagesize, MDBX_db_flags_t flags);
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MDBX_NOTHROW_CONST_FUNCTION LIBMDBX_API intptr_t
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mdbx_limits_valsize_max(intptr_t pagesize, MDBX_db_flags_t flags);
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/** \brief Returns maximal size of key-value pair to fit in a single page with
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* the given size and database flags, or -1 if pagesize is invalid.
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* \ingroup c_statinfo
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* \see db_flags */
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MDBX_NOTHROW_CONST_FUNCTION LIBMDBX_API intptr_t
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mdbx_limits_pairsize4page_max(intptr_t pagesize, MDBX_db_flags_t flags);
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/** \brief Returns maximal data size in bytes to fit in a leaf-page or
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* single overflow/large-page with the given page size and database flags,
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* or -1 if pagesize is invalid.
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* \ingroup c_statinfo
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* \see db_flags */
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MDBX_NOTHROW_CONST_FUNCTION LIBMDBX_API intptr_t
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mdbx_limits_valsize4page_max(intptr_t pagesize, MDBX_db_flags_t flags);
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/** \brief Returns maximal write transaction size (i.e. limit for summary volume
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* of dirty pages) in bytes for given page size, or -1 if pagesize is invalid.
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* \ingroup c_statinfo */
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39
src/core.c
39
src/core.c
@ -416,7 +416,7 @@ node_largedata_pgno(const MDBX_node *const __restrict node) {
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* and so on up to the root. Therefore double-splitting is avoided here and
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* the maximum node size is half of a leaf page space:
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* LEAF_NODE_MAX = even_floor(PAGEROOM / 2 - sizeof(indx_t));
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* DATALEN_NO_OVERFLOW = LEAF_NODE_MAX - KEYLEN_MAX;
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* DATALEN_NO_OVERFLOW = LEAF_NODE_MAX - NODESIZE - KEYLEN_MAX;
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*
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* - SubDatabase-node must fit into one leaf-page:
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* SUBDB_NAME_MAX = LEAF_NODE_MAX - node_hdr_len - sizeof(MDBX_db);
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@ -530,6 +530,38 @@ __cold intptr_t mdbx_limits_valsize_max(intptr_t pagesize,
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return valsize_max(pagesize, flags);
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}
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__cold intptr_t mdbx_limits_pairsize4page_max(intptr_t pagesize,
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MDBX_db_flags_t flags) {
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if (pagesize < 1)
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pagesize = (intptr_t)mdbx_default_pagesize();
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if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE ||
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pagesize > (intptr_t)MAX_PAGESIZE ||
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!is_powerof2((size_t)pagesize)))
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return -1;
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if (flags &
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(MDBX_DUPSORT | MDBX_DUPFIXED | MDBX_INTEGERDUP | MDBX_REVERSEDUP))
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return BRANCH_NODE_MAX(pagesize) - NODESIZE;
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return LEAF_NODE_MAX(pagesize) - NODESIZE;
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}
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intptr_t mdbx_limits_valsize4page_max(intptr_t pagesize,
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MDBX_db_flags_t flags) {
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if (pagesize < 1)
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pagesize = (intptr_t)mdbx_default_pagesize();
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if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE ||
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pagesize > (intptr_t)MAX_PAGESIZE ||
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!is_powerof2((size_t)pagesize)))
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return -1;
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if (flags &
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(MDBX_DUPSORT | MDBX_DUPFIXED | MDBX_INTEGERDUP | MDBX_REVERSEDUP))
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return valsize_max(pagesize, flags);
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return PAGEROOM(pagesize);
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}
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/* Calculate the size of a leaf node.
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*
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* The size depends on the environment's page size; if a data item
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@ -565,10 +597,10 @@ branch_size(const MDBX_env *env, const MDBX_val *key) {
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/* Size of a node in a branch page with a given key.
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* This is just the node header plus the key, there is no data. */
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size_t node_bytes = node_size(key, nullptr);
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if (unlikely(node_bytes > env->me_leaf_nodemax)) {
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if (unlikely(node_bytes > env->me_branch_nodemax)) {
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/* put on large/overflow page */
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/* not implemented */
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mdbx_assert_fail(env, "INDXSIZE(key) <= env->me_nodemax", __func__,
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mdbx_assert_fail(env, "node_size(key) <= branch_nodemax", __func__,
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__LINE__);
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node_bytes = node_size(key, nullptr) + sizeof(pgno_t);
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}
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@ -11544,6 +11576,7 @@ __cold static void setup_pagesize(MDBX_env *env, const size_t pagesize) {
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leaf_nodemax >= branch_nodemax &&
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leaf_nodemax < (int)UINT16_MAX && leaf_nodemax % 2 == 0);
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env->me_leaf_nodemax = (unsigned)leaf_nodemax;
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env->me_branch_nodemax = (unsigned)branch_nodemax;
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env->me_psize2log = (uint8_t)log2n_powerof2(pagesize);
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eASSERT(env, pgno2bytes(env, 1) == pagesize);
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eASSERT(env, bytes2pgno(env, pagesize + pagesize) == 2);
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@ -1164,6 +1164,7 @@ struct MDBX_env {
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unsigned me_psize; /* DB page size, initialized from me_os_psize */
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unsigned me_leaf_nodemax; /* max size of a leaf-node */
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unsigned me_branch_nodemax; /* max size of a branch-node */
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uint8_t me_psize2log; /* log2 of DB page size */
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int8_t me_stuck_meta; /* recovery-only: target meta page or less that zero */
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uint16_t me_merge_threshold,
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