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Add explicit md_dirty flag to dbxs

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This commit is contained in:
Howard Chu 2011-08-09 18:56:08 -07:00
parent edf7869466
commit e5cf84495b
1 changed files with 20 additions and 10 deletions
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30
libraries/libmdb/mdb.c
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@ -230,6 +230,9 @@ SLIST_HEAD(page_stack, MDB_ppage);
#define CURSOR_POP(c) SLIST_REMOVE_HEAD(&(c)->mc_stack, mp_entry)
#define CURSOR_PUSH(c,p) SLIST_INSERT_HEAD(&(c)->mc_stack, p, mp_entry)
struct MDB_fakeenv {
};
struct MDB_cursor {
MDB_txn *mc_txn;
struct page_stack mc_stack; /* stack of parent pages */
@ -260,6 +263,8 @@ typedef struct MDB_dbx {
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_dbi md_parent;
unsigned int md_dirty;
} MDB_dbx;
struct MDB_txn {
@ -682,6 +687,8 @@ mdb_txn_abort(MDB_txn *txn)
txn->mt_u.reader->mr_txnid = 0;
} else {
MDB_oldpages *mop;
unsigned int i;
/* Discard all dirty pages. */
while (!STAILQ_EMPTY(txn->mt_u.dirty_queue)) {
dp = STAILQ_FIRST(txn->mt_u.dirty_queue);
@ -698,6 +705,8 @@ mdb_txn_abort(MDB_txn *txn)
env->me_txn = NULL;
env->me_txns->mt_txnid--;
for (i=2; i<env->me_numdbs; i++)
env->me_dbxs[i].md_dirty = 0;
pthread_mutex_unlock(&env->me_txns->mt_wmutex);
}
@ -797,16 +806,12 @@ mdb_txn_commit(MDB_txn *txn)
MDB_val data;
data.mv_size = sizeof(MDB_db);
for (i = 2; i < env->me_numdbs; i++) {
if (env->me_dbs[env->me_db_toggle][i].md_root != txn->mt_dbs[i].md_root) {
for (i = 2; i < txn->mt_numdbs; i++) {
if (txn->mt_dbxs[i].md_dirty) {
data.mv_data = &txn->mt_dbs[i];
mdb_put(txn, i, &txn->mt_dbxs[i].md_name, &data, 0);
}
}
for (i = env->me_numdbs; i < txn->mt_numdbs; i++) {
data.mv_data = &txn->mt_dbs[i];
mdb_put(txn, i, &txn->mt_dbxs[i].md_name, &data, 0);
}
}
/* Commit up to MDB_COMMIT_PAGES dirty pages to disk until done.
@ -886,11 +891,14 @@ mdb_txn_commit(MDB_txn *txn)
{
int toggle = !env->me_db_toggle;
for (i = 0; i < env->me_numdbs; i++) {
if (env->me_dbs[toggle][i].md_root != txn->mt_dbs[i].md_root)
for (i = 2; i < env->me_numdbs; i++) {
if (txn->mt_dbxs[i].md_dirty) {
env->me_dbs[toggle][i] = txn->mt_dbs[i];
txn->mt_dbxs[i].md_dirty = 0;
}
}
for (i = env->me_numdbs; i < txn->mt_numdbs; i++) {
txn->mt_dbxs[i].md_dirty = 0;
env->me_dbxs[i] = txn->mt_dbxs[i];
env->me_dbs[toggle][i] = txn->mt_dbs[i];
}
@ -1580,13 +1588,13 @@ mdb_search_page(MDB_txn *txn, MDB_dbi dbi, MDB_val *key,
if (modify) {
/* For sub-databases, update main root first */
if (dbi > MAIN_DBI && txn->mt_dbs[dbi].md_root ==
txn->mt_env->me_dbs[txn->mt_env->me_db_toggle][dbi].md_root) {
if (dbi > MAIN_DBI && !txn->mt_dbxs[dbi].md_dirty) {
MDB_pageparent mp2;
rc = mdb_search_page(txn, 0, &txn->mt_dbxs[dbi].md_name,
NULL, 1, &mp2);
if (rc)
return rc;
txn->mt_dbxs[dbi].md_dirty = 1;
}
if (!F_ISSET(mpp->mp_page->mp_flags, P_DIRTY)) {
mpp->mp_parent = NULL;
@ -2837,6 +2845,8 @@ int mdb_open(MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *dbi)
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_dbxs[txn->mt_numdbs].md_parent = MAIN_DBI;
txn->mt_dbxs[txn->mt_numdbs].md_dirty = 0;
memcpy(&txn->mt_dbs[txn->mt_numdbs], data.mv_data, sizeof(MDB_db));
*dbi = txn->mt_numdbs;
txn->mt_numdbs++;