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Merge commit 'd53644f6'

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This commit is contained in:
Howard Chu 2012-08-21 12:18:10 -07:00
commit a787eb641f
2 changed files with 40 additions and 13 deletions
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47
libraries/libmdb/mdb.c
View File

@ -1328,6 +1328,27 @@ none:
return np;
}
/** Copy a page: avoid copying unused portions of the page.
* @param[in] dst page to copy into
* @param[in] src page to copy from
*/
static void
mdb_page_copy(MDB_page *dst, MDB_page *src, unsigned int psize)
{
dst->mp_flags = src->mp_flags | P_DIRTY;
dst->mp_pages = src->mp_pages;
if (IS_LEAF2(src)) {
memcpy(dst->mp_ptrs, src->mp_ptrs, psize - PAGEHDRSZ - SIZELEFT(src));
} else {
unsigned int i, nkeys = NUMKEYS(src);
for (i=0; i<nkeys; i++)
dst->mp_ptrs[i] = src->mp_ptrs[i];
memcpy((char *)dst+src->mp_upper, (char *)src+src->mp_upper,
psize - src->mp_upper);
}
}
/** Touch a page: make it dirty and re-insert into tree with updated pgno.
* @param[in] mc cursor pointing to the page to be touched
* @return 0 on success, non-zero on failure.
@ -1345,11 +1366,16 @@ mdb_page_touch(MDB_cursor *mc)
DPRINTF("touched db %u page %zu -> %zu", mc->mc_dbi, mp->mp_pgno, np->mp_pgno);
assert(mp->mp_pgno != np->mp_pgno);
mdb_midl_append(&mc->mc_txn->mt_free_pgs, mp->mp_pgno);
pgno = np->mp_pgno;
memcpy(np, mp, mc->mc_txn->mt_env->me_psize);
if (SIZELEFT(mp)) {
/* If page isn't full, just copy the used portion */
mdb_page_copy(np, mp, mc->mc_txn->mt_env->me_psize);
} else {
pgno = np->mp_pgno;
memcpy(np, mp, mc->mc_txn->mt_env->me_psize);
np->mp_pgno = pgno;
np->mp_flags |= P_DIRTY;
}
mp = np;
mp->mp_pgno = pgno;
mp->mp_flags |= P_DIRTY;
finish:
/* Adjust other cursors pointing to mp */
@ -1578,7 +1604,8 @@ mdb_txn_renew0(MDB_txn *txn)
for (i=2; i<txn->mt_numdbs; i++)
txn->mt_dbs[i].md_flags = env->me_dbflags[i];
txn->mt_dbflags[0] = txn->mt_dbflags[1] = 0;
memset(txn->mt_dbflags+2, DB_STALE, env->me_numdbs-2);
if (txn->mt_numdbs > 2)
memset(txn->mt_dbflags+2, DB_STALE, txn->mt_numdbs-2);
return MDB_SUCCESS;
}
@ -1880,7 +1907,7 @@ mdb_txn_commit(MDB_txn *txn)
/* Update DB root pointers. Their pages have already been
* touched so this is all in-place and cannot fail.
*/
{
if (txn->mt_numdbs > 2) {
MDB_dbi i;
MDB_val data;
data.mv_size = sizeof(MDB_db);
@ -3331,10 +3358,10 @@ mdb_cursor_adjust(MDB_cursor *mc, func)
static void
mdb_cursor_pop(MDB_cursor *mc)
{
MDB_page *top;
if (mc->mc_snum) {
top = mc->mc_pg[mc->mc_top];
#if MDB_DEBUG
MDB_page *top = mc->mc_pg[mc->mc_top];
#endif
mc->mc_snum--;
if (mc->mc_snum)
mc->mc_top--;
@ -3809,7 +3836,7 @@ mdb_cursor_set(MDB_cursor *mc, MDB_val *key, MDB_val *data,
{
int rc;
MDB_page *mp;
MDB_node *leaf;
MDB_node *leaf = NULL;
DKBUF;
assert(mc);

6
libraries/libmdb/mdb.h
View File

@ -80,7 +80,7 @@ extern "C" {
/** Library minor version */
#define MDB_VERSION_MINOR 9
/** Library patch version */
#define MDB_VERSION_PATCH 0
#define MDB_VERSION_PATCH 2
/** Combine args a,b,c into a single integer for easy version comparisons */
#define MDB_VERINT(a,b,c) (((a) << 24) | ((b) << 16) | (c))
@ -90,10 +90,10 @@ extern "C" {
MDB_VERINT(MDB_VERSION_MAJOR,MDB_VERSION_MINOR,MDB_VERSION_PATCH)
/** The release date of this library version */
#define MDB_VERSION_DATE "September 1, 2011"
#define MDB_VERSION_DATE "August 2, 2012"
/** A stringifier for the version info */
#define MDB_VERSTR(a,b,c,d) "MDB " #a "." #b "." #c ": (" #d ")"
#define MDB_VERSTR(a,b,c,d) "MDB " #a "." #b "." #c ": (" d ")"
/** A helper for the stringifier macro */
#define MDB_VERFOO(a,b,c,d) MDB_VERSTR(a,b,c,d)