NextGraph
/
lmdb
mirror of https://github.com/nextgraph-org/lmdb.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Tweak mt_dbxs array

Browse Source
vmware
Howard Chu 13 years ago
parent 8211dd3960
commit 9b4c689601
2 changed files with 58 additions and 62 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 115
      libraries/libmdb/mdb.c
  2. 5
      libraries/libmdb/mdb.h

115
libraries/libmdb/mdb.c
Unescape View File

@ -211,12 +211,6 @@ typedef struct MDB_node {
char mn_data[1];
} MDB_node;
typedef struct MDB_dbx {
char *md_name;
MDB_cmp_func *md_cmp; /* user compare function */
MDB_rel_func *md_rel; /* user relocate function */
} MDB_dbx;
typedef struct MDB_db {
uint32_t md_pad;
uint16_t md_flags;
@ -228,6 +222,16 @@ typedef struct MDB_db {
pgno_t md_root;
} MDB_db;
typedef struct MDB_dbx {
char *md_name;
MDB_cmp_func *md_cmp; /* user compare function */
MDB_cmp_func *md_dcmp; /* user dupsort function */
MDB_rel_func *md_rel; /* user relocate function */
MDB_db *md_db;
MDB_page *md_page;
unsigned int md_ki; /* cursor index on parent page */
} MDB_dbx;
struct MDB_txn {
pgno_t mt_next_pgno; /* next unallocated page */
ULONG mt_txnid;
@ -239,7 +243,6 @@ struct MDB_txn {
MDB_reader *reader;
} mt_u;
MDB_dbx *mt_dbxs; /* array */
MDB_db **mt_dbs; /* array of ptrs */
MDB_db mt_db0; /* just for write txns */
unsigned int mt_numdbs;
@ -265,7 +268,6 @@ struct MDB_env {
MDB_oldpages *me_pghead;
MDB_oldpages *me_pgtail;
MDB_dbx *me_dbxs; /* array */
MDB_db **me_dbs; /* array of ptrs */
unsigned int me_numdbs;
};
@ -381,7 +383,7 @@ mdb_cmp(MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b)
static int
_mdb_cmp(MDB_txn *txn, MDB_dbi dbi, const MDB_val *key1, const MDB_val *key2)
{
if (F_ISSET(txn->mt_dbs[dbi]->md_flags, MDB_REVERSEKEY))
if (F_ISSET(txn->mt_dbxs[dbi].md_db->md_flags, MDB_REVERSEKEY))
return memnrcmp(key1->mv_data, key1->mv_size, key2->mv_data, key2->mv_size);
else
return memncmp((char *)key1->mv_data, key1->mv_size, key2->mv_data, key2->mv_size);
@ -562,20 +564,18 @@ mdb_txn_begin(MDB_env *env, int rdonly, MDB_txn **ret)
txn->mt_numdbs = env->me_numdbs;
rc = (txn->mt_numdbs % DBX_CHUNK) + 1;
txn->mt_dbxs = malloc(rc * DBX_CHUNK * sizeof(MDB_dbx));
txn->mt_dbs = malloc(rc * DBX_CHUNK * sizeof(MDB_db *));
memcpy(txn->mt_dbxs, env->me_dbxs, txn->mt_numdbs * sizeof(MDB_dbx));
memcpy(txn->mt_dbs, env->me_dbs, txn->mt_numdbs * sizeof(MDB_db *));
if (!rdonly) {
memcpy(&txn->mt_db0, txn->mt_dbs[0], sizeof(txn->mt_db0));
txn->mt_dbs[0] = &txn->mt_db0;
memcpy(&txn->mt_db0, txn->mt_dbxs[0].md_db, sizeof(txn->mt_db0));
txn->mt_dbxs[0].md_db = &txn->mt_db0;
if (toggle)
txn->mt_flags |= MDB_TXN_METOGGLE;
txn->mt_next_pgno = env->me_meta.mm_last_pg+1;
}
DPRINTF("begin transaction %lu on mdbenv %p, root page %lu",
txn->mt_txnid, (void *) env, txn->mt_dbs[0]->md_root);
txn->mt_txnid, (void *) env, txn->mt_dbxs[0].md_db->md_root);
*ret = txn;
return MDB_SUCCESS;
@ -592,9 +592,8 @@ mdb_txn_abort(MDB_txn *txn)
env = txn->mt_env;
DPRINTF("abort transaction %lu on mdbenv %p, root page %lu",
txn->mt_txnid, (void *) env, txn->mt_dbs[0]->md_root);
txn->mt_txnid, (void *) env, txn->mt_dbxs[0].md_db->md_root);
free(txn->mt_dbs);
free(txn->mt_dbxs);
if (F_ISSET(txn->mt_flags, MDB_TXN_RDONLY)) {
@ -673,7 +672,7 @@ mdb_txn_commit(MDB_txn *txn)
goto done;
DPRINTF("committing transaction %lu on mdbenv %p, root page %lu",
txn->mt_txnid, (void *) env, txn->mt_dbs[0]->md_root);
txn->mt_txnid, (void *) env, txn->mt_dbxs[0].md_db->md_root);
/* Commit up to MDB_COMMIT_PAGES dirty pages to disk until done.
*/
@ -750,14 +749,11 @@ mdb_txn_commit(MDB_txn *txn)
{
MDB_dbx *p1 = env->me_dbxs;
MDB_db **p2 = env->me_dbs;
txn->mt_dbs[0] = env->me_dbs[0];
txn->mt_dbxs[0].md_db = env->me_dbxs[0].md_db;
env->me_dbxs = txn->mt_dbxs;
env->me_dbs = txn->mt_dbs;
env->me_numdbs = txn->mt_numdbs;
free(p2);
free(p1);
}
@ -884,7 +880,7 @@ mdbenv_write_meta(MDB_txn *txn)
assert(txn != NULL);
assert(txn->mt_env != NULL);
DPRINTF("writing meta page for root page %lu", txn->mt_dbs[0]->md_root);
DPRINTF("writing meta page for root page %lu", txn->mt_dbxs[0].md_db->md_root);
env = txn->mt_env;
@ -897,12 +893,12 @@ mdbenv_write_meta(MDB_txn *txn)
meta.mm_txnid = txn->mt_txnid;
meta.mm_psize = env->me_meta.mm_psize;
meta.mm_flags = env->me_meta.mm_flags;
meta.mm_depth = txn->mt_dbs[0]->md_depth;
meta.mm_branch_pages = txn->mt_dbs[0]->md_branch_pages;
meta.mm_leaf_pages = txn->mt_dbs[0]->md_leaf_pages;
meta.mm_overflow_pages = txn->mt_dbs[0]->md_overflow_pages;
meta.mm_entries = txn->mt_dbs[0]->md_entries;
meta.mm_root = txn->mt_dbs[0]->md_root;
meta.mm_depth = txn->mt_dbxs[0].md_db->md_depth;
meta.mm_branch_pages = txn->mt_dbxs[0].md_db->md_branch_pages;
meta.mm_leaf_pages = txn->mt_dbxs[0].md_db->md_leaf_pages;
meta.mm_overflow_pages = txn->mt_dbxs[0].md_db->md_overflow_pages;
meta.mm_entries = txn->mt_dbxs[0].md_db->md_entries;
meta.mm_root = txn->mt_dbxs[0].md_db->md_root;
if (!F_ISSET(txn->mt_flags, MDB_TXN_METOGGLE))
off += env->me_meta.mm_psize;
@ -1205,9 +1201,8 @@ mdbenv_open(MDB_env *env, const char *path, unsigned int flags, mode_t mode)
if (excl)
mdbenv_share_locks(env);
env->me_dbxs = calloc(DBX_CHUNK, sizeof(MDB_dbx));
env->me_dbs = calloc(DBX_CHUNK, sizeof(MDB_db *));
env->me_numdbs = 1;
env->me_dbs[0] = (MDB_db *)&env->me_meta.mm_psize;
env->me_dbxs[0].md_db = (MDB_db *)&env->me_meta.mm_psize;
}
@ -1222,7 +1217,6 @@ mdbenv_close(MDB_env *env)
if (env == NULL)
return;
free(env->me_dbs);
free(env->me_dbxs);
free(env->me_path);
@ -1452,7 +1446,7 @@ mdb_search_page(MDB_txn *txn, MDB_dbi dbi, MDB_val *key,
DPRINTF("transaction has failed, must abort");
return EINVAL;
} else
root = txn->mt_dbs[dbi]->md_root;
root = txn->mt_dbxs[dbi].md_db->md_root;
if (root == P_INVALID) { /* Tree is empty. */
DPRINTF("tree is empty");
@ -1469,7 +1463,7 @@ mdb_search_page(MDB_txn *txn, MDB_dbi dbi, MDB_val *key,
mpp->mp_pi = 0;
if ((rc = mdb_touch(txn, mpp)))
return rc;
txn->mt_dbs[dbi]->md_root = mpp->mp_page->mp_pgno;
txn->mt_dbxs[dbi].md_db->md_root = mpp->mp_page->mp_pgno;
}
return mdb_search_page_root(txn, dbi, key, cursor, modify, mpp);
@ -1761,11 +1755,11 @@ mdb_new_page(MDB_txn *txn, MDB_dbi dbi, uint32_t flags, int num)
dp->p.mp_upper = txn->mt_env->me_meta.mm_psize;
if (IS_BRANCH(&dp->p))
txn->mt_dbs[dbi]->md_branch_pages++;
txn->mt_dbxs[dbi].md_db->md_branch_pages++;
else if (IS_LEAF(&dp->p))
txn->mt_dbs[dbi]->md_leaf_pages++;
txn->mt_dbxs[dbi].md_db->md_leaf_pages++;
else if (IS_OVERFLOW(&dp->p)) {
txn->mt_dbs[dbi]->md_overflow_pages += num;
txn->mt_dbxs[dbi].md_db->md_overflow_pages += num;
dp->p.mp_pages = num;
}
@ -2126,9 +2120,9 @@ mdb_merge(MDB_txn *txn, MDB_dbi dbi, MDB_pageparent *src, MDB_pageparent *dst)
}
if (IS_LEAF(src->mp_page))
txn->mt_dbs[dbi]->md_leaf_pages--;
txn->mt_dbxs[dbi].md_db->md_leaf_pages--;
else
txn->mt_dbs[dbi]->md_branch_pages--;
txn->mt_dbxs[dbi].md_db->md_branch_pages--;
mpp.mp_page = src->mp_parent;
dh = (MDB_dhead *)src->mp_parent;
@ -2165,16 +2159,16 @@ mdb_rebalance(MDB_txn *txn, MDB_dbi dbi, MDB_pageparent *mpp)
if (mpp->mp_parent == NULL) {
if (NUMKEYS(mpp->mp_page) == 0) {
DPRINTF("tree is completely empty");
txn->mt_dbs[dbi]->md_root = P_INVALID;
txn->mt_dbs[dbi]->md_depth--;
txn->mt_dbs[dbi]->md_leaf_pages--;
txn->mt_dbxs[dbi].md_db->md_root = P_INVALID;
txn->mt_dbxs[dbi].md_db->md_depth--;
txn->mt_dbxs[dbi].md_db->md_leaf_pages--;
} else if (IS_BRANCH(mpp->mp_page) && NUMKEYS(mpp->mp_page) == 1) {
DPRINTF("collapsing root page!");
txn->mt_dbs[dbi]->md_root = NODEPGNO(NODEPTR(mpp->mp_page, 0));
if ((root = mdbenv_get_page(txn->mt_env, txn->mt_dbs[dbi]->md_root)) == NULL)
txn->mt_dbxs[dbi].md_db->md_root = NODEPGNO(NODEPTR(mpp->mp_page, 0));
if ((root = mdbenv_get_page(txn->mt_env, txn->mt_dbxs[dbi].md_db->md_root)) == NULL)
return MDB_FAIL;
txn->mt_dbs[dbi]->md_depth--;
txn->mt_dbs[dbi]->md_branch_pages--;
txn->mt_dbxs[dbi].md_db->md_depth--;
txn->mt_dbxs[dbi].md_db->md_branch_pages--;
} else
DPRINTF("root page doesn't need rebalancing");
return MDB_SUCCESS;
@ -2281,7 +2275,7 @@ mdb_del(MDB_txn *txn, MDB_dbi dbi,
pg++;
}
}
txn->mt_dbs[dbi]->md_entries--;
txn->mt_dbxs[dbi].md_db->md_entries--;
rc = mdb_rebalance(txn, dbi, &mpp);
if (rc != MDB_SUCCESS)
txn->mt_flags |= MDB_TXN_ERROR;
@ -2324,9 +2318,9 @@ mdb_split(MDB_txn *txn, MDB_dbi dbi, MDB_page **mpp, unsigned int *newindxp,
return MDB_FAIL;
mdp->h.md_pi = 0;
mdp->h.md_parent = &pdp->p;
txn->mt_dbs[dbi]->md_root = pdp->p.mp_pgno;
txn->mt_dbxs[dbi].md_db->md_root = pdp->p.mp_pgno;
DPRINTF("root split! new root = %lu", pdp->p.mp_pgno);
txn->mt_dbs[dbi]->md_depth++;
txn->mt_dbxs[dbi].md_db->md_depth++;
/* Add left (implicit) pointer. */
if (mdb_add_node(txn, dbi, &pdp->p, 0, NULL, NULL,
@ -2499,8 +2493,8 @@ mdb_put(MDB_txn *txn, MDB_dbi dbi,
return ENOMEM;
}
mpp.mp_page = &dp->p;
txn->mt_dbs[dbi]->md_root = mpp.mp_page->mp_pgno;
txn->mt_dbs[dbi]->md_depth++;
txn->mt_dbxs[dbi].md_db->md_root = mpp.mp_page->mp_pgno;
txn->mt_dbxs[dbi].md_db->md_depth++;
ki = 0;
}
else
@ -2520,7 +2514,7 @@ mdb_put(MDB_txn *txn, MDB_dbi dbi,
if (rc != MDB_SUCCESS)
txn->mt_flags |= MDB_TXN_ERROR;
else
txn->mt_dbs[dbi]->md_entries++;
txn->mt_dbxs[dbi].md_db->md_entries++;
done:
return rc;
@ -2594,6 +2588,7 @@ int mdb_open(MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *dbi)
data.mv_data = &dummy;
memset(&dummy, 0, sizeof(dummy));
dummy.md_root = P_INVALID;
dummy.md_flags = flags & 0xffff;
rc = mdb_put(txn, 0, &key, &data, 0);
if (rc == MDB_SUCCESS)
rc = mdb_get(txn, 0, &key, &data);
@ -2604,22 +2599,18 @@ int mdb_open(MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *dbi)
/* Is there a free slot? */
if ((txn->mt_numdbs & (DBX_CHUNK-1)) == 0) {
MDB_dbx *p1;
MDB_db **p2;
int i;
i = txn->mt_numdbs + DBX_CHUNK;
p1 = realloc(txn->mt_dbxs, i * sizeof(MDB_dbx));
if (p1 == NULL)
return ENOMEM;
txn->mt_dbxs = p1;
p2 = realloc(txn->mt_dbs, i * sizeof(MDB_db *));
if (p2 == NULL)
return ENOMEM;
txn->mt_dbs = p2;
}
txn->mt_dbxs[txn->mt_numdbs].md_name = strdup(name);
txn->mt_dbxs[txn->mt_numdbs].md_cmp = NULL;
txn->mt_dbxs[txn->mt_numdbs].md_dcmp = NULL;
txn->mt_dbxs[txn->mt_numdbs].md_rel = NULL;
txn->mt_dbs[txn->mt_numdbs] = data.mv_data;
txn->mt_dbxs[txn->mt_numdbs].md_db = data.mv_data;
*dbi = txn->mt_numdbs;
txn->mt_numdbs++;
}
@ -2633,11 +2624,11 @@ int mdb_stat(MDB_txn *txn, MDB_dbi dbi, MDB_stat *arg)
return EINVAL;
arg->ms_psize = txn->mt_env->me_meta.mm_psize;
arg->ms_depth = txn->mt_dbs[dbi]->md_depth;
arg->ms_branch_pages = txn->mt_dbs[dbi]->md_branch_pages;
arg->ms_leaf_pages = txn->mt_dbs[dbi]->md_leaf_pages;
arg->ms_overflow_pages = txn->mt_dbs[dbi]->md_overflow_pages;
arg->ms_entries = txn->mt_dbs[dbi]->md_entries;
arg->ms_depth = txn->mt_dbxs[dbi].md_db->md_depth;
arg->ms_branch_pages = txn->mt_dbxs[dbi].md_db->md_branch_pages;
arg->ms_leaf_pages = txn->mt_dbxs[dbi].md_db->md_leaf_pages;
arg->ms_overflow_pages = txn->mt_dbxs[dbi].md_db->md_overflow_pages;
arg->ms_entries = txn->mt_dbxs[dbi].md_db->md_entries;
return MDB_SUCCESS;
}

5
libraries/libmdb/mdb.h
Unescape View File

@ -38,6 +38,7 @@ typedef enum MDB_cursor_op { /* cursor operations */
/* DB flags */
#define MDB_REVERSEKEY 0x02 /* use reverse string keys */
#define MDB_DUPSORT 0x04 /* use sorted duplicates */
#define MDB_NOSYNC 0x10000 /* don't fsync after commit */
#define MDB_RDONLY 0x20000 /* read only */
#define MDB_CREATE 0x40000 /* create if not present */
@ -73,6 +74,10 @@ int mdb_open(MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *dbi);
int mdb_stat(MDB_txn *txn, MDB_dbi dbi, MDB_stat *stat);
void mdb_close(MDB_txn *txn, MDB_dbi dbi);
int mdb_set_compare(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp);
int mdb_set_dupsort(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp);
int mdb_set_relfunc(MDB_txn *txn, MDB_dbi dbi, MDB_rel_func *rel);
int mdb_get(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data);
int mdb_put(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data,
unsigned int flags);

Write Preview
Loading…
Cancel
Save