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mdbx: add mdbx_limits_xyz().

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Change-Id: I56c79704c59386a0c4d84b001020484c23925e6c
This commit is contained in:
Leonid Yuriev
2018-08-20 12:30:09 +03:00
parent 08fa2c1746
commit a0d10e41b8
3 changed files with 61 additions and 20 deletions
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61
src/mdbx.c
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@@ -4921,7 +4921,7 @@ fail:
return rc;
}
int __cold mdbx_env_get_maxkeysize(MDBX_env *env) {
intptr_t __cold mdbx_env_get_maxkeysize(MDBX_env *env) {
if (!env || env->me_signature != MDBX_ME_SIGNATURE || !env->me_maxkey_limit)
return -MDBX_EINVAL;
return env->me_maxkey_limit;
@@ -4935,18 +4935,6 @@ int __cold mdbx_env_get_maxkeysize(MDBX_env *env) {
#define mdbx_maxgc_ov1page(pagesize) \
(((pagesize)-PAGEHDRSZ) / sizeof(pgno_t) - 1)
int mdbx_get_maxkeysize(size_t pagesize) {
if (pagesize == 0)
pagesize = mdbx_syspagesize();
intptr_t nodemax = mdbx_nodemax(pagesize);
if (nodemax < 0)
return -MDBX_EINVAL;
intptr_t maxkey = mdbx_maxkey(nodemax);
return (maxkey > 0 && maxkey < INT_MAX) ? (int)maxkey : -MDBX_EINVAL;
}
static void __cold mdbx_setup_pagesize(MDBX_env *env, const size_t pagesize) {
STATIC_ASSERT(SSIZE_MAX > MAX_MAPSIZE);
STATIC_ASSERT(MIN_PAGESIZE > sizeof(MDBX_page));
@@ -12325,6 +12313,53 @@ int mdbx_dbi_sequence(MDBX_txn *txn, MDBX_dbi dbi, uint64_t *result,
return MDBX_SUCCESS;
}
/*----------------------------------------------------------------------------*/
__cold intptr_t mdbx_limits_keysize_max(intptr_t pagesize) {
if (pagesize < 1)
pagesize = (intptr_t)mdbx_syspagesize();
else if (unlikely(pagesize < MIN_PAGESIZE || pagesize > MAX_PAGESIZE ||
!mdbx_is_power2((size_t)pagesize)))
return -MDBX_EINVAL;
return mdbx_maxkey(mdbx_nodemax(pagesize));
}
__cold intptr_t mdbx_limits_pgsize_min(void) { return MIN_PAGESIZE; }
__cold intptr_t mdbx_limits_pgsize_max(void) { return MAX_PAGESIZE; }
__cold intptr_t mdbx_limits_dbsize_min(intptr_t pagesize) {
if (pagesize < 1)
pagesize = (intptr_t)mdbx_syspagesize();
else if (unlikely(pagesize < MIN_PAGESIZE || pagesize > MAX_PAGESIZE ||
!mdbx_is_power2((size_t)pagesize)))
return -MDBX_EINVAL;
return MIN_PAGENO * pagesize;
}
__cold intptr_t mdbx_limits_dbsize_max(intptr_t pagesize) {
if (pagesize < 1)
pagesize = (intptr_t)mdbx_syspagesize();
else if (unlikely(pagesize < MIN_PAGESIZE || pagesize > MAX_PAGESIZE ||
!mdbx_is_power2((size_t)pagesize)))
return -MDBX_EINVAL;
const intptr_t limit = MAX_PAGENO * pagesize;
return ((size_t)limit < MAX_MAPSIZE) ? limit : MAX_PAGESIZE;
}
__cold intptr_t mdbx_limits_txnsize_max(intptr_t pagesize) {
if (pagesize < 1)
pagesize = (intptr_t)mdbx_syspagesize();
else if (unlikely(pagesize < MIN_PAGESIZE || pagesize > MAX_PAGESIZE ||
!mdbx_is_power2((size_t)pagesize)))
return -MDBX_EINVAL;
return pagesize * (MDBX_LIST_MAX - 1);
}
/*----------------------------------------------------------------------------*/
/* attribute support functions for Nexenta */