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Apply LDBM cache changes (c_mutex streamlining) to BDB2 and back.

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This commit is contained in:
Kurt Zeilenga 1999-04-10 04:28:02 +00:00
parent 6da69382f7
commit f16846eb15
2 changed files with 60 additions and 70 deletions
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90
servers/slapd/back-bdb2/cache.c
View File

@ -38,9 +38,7 @@ static void lru_print(struct cache *cache);
static int
cache_entry_private_init( Entry*e )
{
#ifdef LDAP_DEBUG
assert( e->e_private == NULL );
#endif
if( e->e_private != NULL ) {
/* this should never happen */
@ -55,9 +53,7 @@ cache_entry_private_init( Entry*e )
static int
cache_entry_private_destroy( Entry*e )
{
#ifdef LDAP_DEBUG
assert( e->e_private );
#endif
free( e->e_private );
e->e_private = NULL;
@ -70,9 +66,7 @@ bdb2i_cache_return_entry_rw( struct cache *cache, Entry *e, int rw )
/* set cache mutex */
ldap_pvt_thread_mutex_lock( &cache->c_mutex );
#ifdef LDAP_DEBUG
assert( e->e_private );
#endif
LEI(e)->lei_refcnt--;
@ -152,14 +146,16 @@ bdb2i_cache_add_entry_rw(
/* set cache mutex */
ldap_pvt_thread_mutex_lock( &cache->c_mutex );
#ifdef LDAP_DEBUG
assert( e->e_private == NULL );
#endif
if( cache_entry_private_init(e) != 0 ) {
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
Debug( LDAP_DEBUG_ANY,
"====> bdb2i_cache_add_entry( %ld ): \"%s\": private init failed!\n",
e->e_id, e->e_dn, 0 );
return( -1 );
}
@ -265,9 +261,7 @@ bdb2i_cache_update_entry(
/* set cache mutex */
ldap_pvt_thread_mutex_lock( &cache->c_mutex );
#ifdef LDAP_DEBUG
assert( e->e_private );
#endif
if ( avl_insert( &cache->c_dntree, (caddr_t) e,
(AVL_CMP) entry_dn_cmp, avl_dup_error ) != 0 )
@ -361,6 +355,7 @@ bdb2i_cache_find_entry_dn2id(
{
Entry e, *ep;
ID id;
int count = 0;
e.e_dn = dn;
e.e_ndn = dn_normalize_case( ch_strdup( dn ) );
@ -372,52 +367,58 @@ try_again:
if ( (ep = (Entry *) avl_find( cache->c_dntree, (caddr_t) &e,
(AVL_CMP) entry_dn_cmp )) != NULL )
{
int state;
count++;
/*
* ep now points to an unlocked entry
* we do not need to lock the entry if we only
* check the state, refcnt, LRU, and id.
*/
#ifdef LDAP_DEBUG
assert( ep->e_private );
#endif
/* save id */
id = ep->e_id;
state = LEI(ep)->lei_state;
/*
* entry is deleted or not fully created yet
*/
if ( LEI(ep)->lei_state != CACHE_ENTRY_READY ) {
#ifdef LDAP_DEBUG
assert(LEI(ep)->lei_state != CACHE_ENTRY_UNDEFINED);
#endif
Debug(LDAP_DEBUG_TRACE,
"====> bdb2i_cache_find_entry_dn2id(\"%s\"): %ld (not ready) %d\n",
dn, ep->e_id, LEI(ep)->lei_state);
if ( state != CACHE_ENTRY_READY ) {
assert(state != CACHE_ENTRY_UNDEFINED);
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
Debug(LDAP_DEBUG_TRACE,
"====> bdb2i_cache_find_entry_dn2id(\"%s\"): %ld (not ready) %d\n",
dn, id, state);
ldap_pvt_thread_yield();
goto try_again;
}
Debug(LDAP_DEBUG_TRACE,
"====> bdb2i_cache_find_entry_dn2id(\"%s\"): %ld\n",
dn, ep->e_id, 0);
/* lru */
LRU_DELETE( cache, ep );
LRU_ADD( cache, ep );
/* save id */
id = ep->e_id;
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
Debug(LDAP_DEBUG_TRACE,
"====> bdb2i_cache_find_entry_dn2id(\"%s\"): %ld (%d tries)\n",
dn, id, count);
} else {
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
id = NOID;
}
free(e.e_ndn);
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
return( id );
}
@ -434,6 +435,7 @@ bdb2i_cache_find_entry_id(
{
Entry e;
Entry *ep;
int count=0;
e.e_id = id;
@ -444,31 +446,31 @@ try_again:
if ( (ep = (Entry *) avl_find( cache->c_idtree, (caddr_t) &e,
(AVL_CMP) entry_id_cmp )) != NULL )
{
#ifdef LDAP_DEBUG
int state;
assert( ep->e_private );
#endif
state = LEI(ep)->lei_state;
/*
* entry is deleted or not fully created yet
*/
if ( LEI(ep)->lei_state != CACHE_ENTRY_READY ) {
#ifdef LDAP_DEBUG
assert(LEI(ep)->lei_state != CACHE_ENTRY_UNDEFINED);
#endif
Debug(LDAP_DEBUG_TRACE,
"====> bdb2i_cache_find_entry_id( %ld ): %ld (not ready) %d\n",
id, ep->e_id, LEI(ep)->lei_state);
if ( state != CACHE_ENTRY_READY ) {
ID ep_id = ep->e_id;
assert(state != CACHE_ENTRY_UNDEFINED);
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
Debug(LDAP_DEBUG_TRACE,
"====> bdb2i_cache_find_entry_id( %ld ): %ld (not ready) %d\n",
id, ep_id, state);
ldap_pvt_thread_yield();
goto try_again;
}
Debug(LDAP_DEBUG_TRACE,
"====> bdb2i_cache_find_entry_id( %ld, %s ) \"%s\" (found)\n",
id, rw ? "w" : "r", ep->e_dn);
/* lru */
LRU_DELETE( cache, ep );
LRU_ADD( cache, ep );
@ -478,6 +480,10 @@ try_again:
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
Debug(LDAP_DEBUG_TRACE,
"====> bdb2i_cache_find_entry_id( %ld ) \"%s\" (found) (%d tries)\n",
id, ep->e_dn, count);
return( ep );
}
@ -509,9 +515,7 @@ bdb2i_cache_delete_entry(
/* set cache mutex */
ldap_pvt_thread_mutex_lock( &cache->c_mutex );
#ifdef LDAP_DEBUG
assert( e->e_private );
#endif
Debug( LDAP_DEBUG_TRACE, "====> bdb2i_cache_delete_entry( %ld )\n",
e->e_id, 0, 0 );

40
servers/slapd/back-ldbm/cache.c
View File

@ -89,9 +89,7 @@ cache_entry_rdwr_destroy(Entry *e)
static int
cache_entry_private_init( Entry*e )
{
#ifdef LDAP_DEBUG
assert( e->e_private == NULL );
#endif
if( e->e_private != NULL ) {
/* this should never happen */
@ -112,9 +110,7 @@ cache_entry_private_init( Entry*e )
static int
cache_entry_private_destroy( Entry*e )
{
#ifdef LDAP_DEBUG
assert( e->e_private );
#endif
cache_entry_rdwr_destroy( e );
@ -132,9 +128,7 @@ cache_return_entry_rw( struct cache *cache, Entry *e, int rw )
/* set cache mutex */
ldap_pvt_thread_mutex_lock( &cache->c_mutex );
#ifdef LDAP_DEBUG
assert( e->e_private );
#endif
cache_entry_rdwr_unlock(e, rw);
@ -226,9 +220,7 @@ cache_add_entry_rw(
/* set cache mutex */
ldap_pvt_thread_mutex_lock( &cache->c_mutex );
#ifdef LDAP_DEBUG
assert( e->e_private == NULL );
#endif
if( cache_entry_private_init(e) != 0 ) {
/* free cache mutex */
@ -348,9 +340,7 @@ cache_update_entry(
/* set cache mutex */
ldap_pvt_thread_mutex_lock( &cache->c_mutex );
#ifdef LDAP_DEBUG
assert( e->e_private );
#endif
if ( avl_insert( &cache->c_dntree, (caddr_t) e,
(AVL_CMP) entry_dn_cmp, avl_dup_error ) != 0 )
@ -458,7 +448,7 @@ try_again:
if ( (ep = (Entry *) avl_find( cache->c_dntree, (caddr_t) &e,
(AVL_CMP) entry_dn_cmp )) != NULL )
{
id = ep->e_id;
int state;
count++;
/*
@ -469,12 +459,14 @@ try_again:
assert( ep->e_private );
/* save id */
id = ep->e_id;
state = LEI(ep)->lei_state;
/*
* entry is deleted or not fully created yet
*/
if ( LEI(ep)->lei_state != CACHE_ENTRY_READY ) {
int state = LEI(ep)->lei_state;
if ( state != CACHE_ENTRY_READY ) {
assert(state != CACHE_ENTRY_UNDEFINED);
/* free cache mutex */
@ -493,9 +485,6 @@ try_again:
LRU_DELETE( cache, ep );
LRU_ADD( cache, ep );
/* save id */
id = ep->e_id;
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
@ -539,21 +528,20 @@ try_again:
if ( (ep = (Entry *) avl_find( cache->c_idtree, (caddr_t) &e,
(AVL_CMP) entry_id_cmp )) != NULL )
{
int state = LEI(ep)->lei_state;
int state;
count++;
#ifdef LDAP_DEBUG
assert( ep->e_private );
#endif
state = LEI(ep)->lei_state;
/*
* entry is deleted or not fully created yet
*/
if ( state != CACHE_ENTRY_READY ) {
ID ep_id = ep->e_id;
#ifdef LDAP_DEBUG
assert(state != CACHE_ENTRY_UNDEFINED);
#endif
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );
@ -623,9 +611,7 @@ cache_delete_entry(
/* set cache mutex */
ldap_pvt_thread_mutex_lock( &cache->c_mutex );
#ifdef LDAP_DEBUG
assert( e->e_private );
#endif
Debug( LDAP_DEBUG_TRACE, "====> cache_delete_entry( %ld )\n",
e->e_id, 0, 0 );
@ -689,9 +675,8 @@ cache_release_all( struct cache *cache )
Debug( LDAP_DEBUG_TRACE, "====> cache_release_all\n", 0, 0, 0 );
while ( (e = cache->c_lrutail) != NULL && LEI(e)->lei_refcnt == 0 ) {
#ifdef LDAP_DEBUG
assert(!ldap_pvt_thread_rdwr_active(&LEI(e)->lei_rdwr));
#endif
/* delete from cache and lru q */
/* XXX do we need rc ? */
rc = cache_delete_entry_internal( cache, e );
@ -699,8 +684,9 @@ cache_release_all( struct cache *cache )
entry_free( e );
}
if ( cache->c_cursize )
if ( cache->c_cursize ) {
Debug( LDAP_DEBUG_TRACE, "Entry-cache could not be emptied\n", 0, 0, 0 );
}
/* free cache mutex */
ldap_pvt_thread_mutex_unlock( &cache->c_mutex );