From 41138a8ca79005f4c53feb0d6b92fc3dd729db66 Mon Sep 17 00:00:00 2001 From: Kurt Zeilenga Date: Sun, 24 Mar 2002 02:15:17 +0000 Subject: [PATCH] cleanlup --- servers/slapd/back-ldbm/cache.c | 151 +------------------------------- 1 file changed, 1 insertion(+), 150 deletions(-) diff --git a/servers/slapd/back-ldbm/cache.c b/servers/slapd/back-ldbm/cache.c index b5aaaa2f37..72ec35e9b7 100644 --- a/servers/slapd/back-ldbm/cache.c +++ b/servers/slapd/back-ldbm/cache.c @@ -19,14 +19,9 @@ /* LDBM backend specific entry info -- visible only to the cache */ typedef struct ldbm_entry_info { -#ifdef LDBM_ENTRY_RWLOCK - ldap_pvt_thread_rdwr_t lei_rdwr; /* reader/writer lock */ -#endif - /* - * remaining fields require backend cache lock to access * These items are specific to the LDBM backend and should - * be hidden. + * be hidden. Backend cache lock required to access. */ int lei_state; /* for the cache */ #define CACHE_ENTRY_UNDEFINED 0 @@ -47,77 +42,6 @@ static int cache_delete_entry_internal(Cache *cache, Entry *e); static void lru_print(Cache *cache); #endif -#ifdef LDBM_ENTRY_RWLOCK -static int -cache_entry_rdwr_lock(Entry *e, int rw) -{ -#ifdef NEW_LOGGING - LDAP_LOG(( "cache", LDAP_LEVEL_ENTRY, - "cache_entry_rdwr_lock: %s lock on ID %ld\n", - rw ? "w" : "r", e->e_id )); -#else - Debug( LDAP_DEBUG_ARGS, "entry_rdwr_%slock: ID: %ld\n", - rw ? "w" : "r", e->e_id, 0); -#endif - - - if (rw) - return ldap_pvt_thread_rdwr_wlock(&LEI(e)->lei_rdwr); - else - return ldap_pvt_thread_rdwr_rlock(&LEI(e)->lei_rdwr); -} - -static int -cache_entry_rdwr_trylock(Entry *e, int rw) -{ -#ifdef NEW_LOGGING - LDAP_LOG(( "cache", LDAP_LEVEL_ENTRY, - "cache_entry_rdwr_trylock: try %s lock on ID: %ld.\n", - rw ? "w" : "r", e->e_id )); -#else - Debug( LDAP_DEBUG_ARGS, "entry_rdwr_%strylock: ID: %ld\n", - rw ? "w" : "r", e->e_id, 0); -#endif - - - if (rw) - return ldap_pvt_thread_rdwr_wtrylock(&LEI(e)->lei_rdwr); - else - return ldap_pvt_thread_rdwr_rtrylock(&LEI(e)->lei_rdwr); -} - -static int -cache_entry_rdwr_unlock(Entry *e, int rw) -{ -#ifdef NEW_LOGGING - LDAP_LOG(( "cache", LDAP_LEVEL_ENTRY, - "cache_entry_rdwr_unlock: remove %s lock on ID %ld.\n", - rw ? "w" : "r", e->e_id )); -#else - Debug( LDAP_DEBUG_ARGS, "entry_rdwr_%sunlock: ID: %ld\n", - rw ? "w" : "r", e->e_id, 0); -#endif - - - if (rw) - return ldap_pvt_thread_rdwr_wunlock(&LEI(e)->lei_rdwr); - else - return ldap_pvt_thread_rdwr_runlock(&LEI(e)->lei_rdwr); -} - -static int -cache_entry_rdwr_init(Entry *e) -{ - return ldap_pvt_thread_rdwr_init( &LEI(e)->lei_rdwr ); -} - -static int -cache_entry_rdwr_destroy(Entry *e) -{ - return ldap_pvt_thread_rdwr_destroy( &LEI(e)->lei_rdwr ); -} -#endif - static int cache_entry_private_init( Entry*e ) { @@ -130,14 +54,6 @@ cache_entry_private_init( Entry*e ) e->e_private = ch_calloc(1, sizeof(struct ldbm_entry_info)); -#ifdef LDBM_ENTRY_RWLOCK - if( cache_entry_rdwr_init( e ) != 0 ) { - free( LEI(e) ); - e->e_private = NULL; - return 1; - } -#endif - return 0; } @@ -163,10 +79,6 @@ cache_entry_private_destroy( Entry*e ) { assert( e->e_private ); -#ifdef LDBM_ENTRY_RWLOCK - cache_entry_rdwr_destroy( e ); -#endif - free( e->e_private ); e->e_private = NULL; return 0; @@ -183,10 +95,6 @@ cache_return_entry_rw( Cache *cache, Entry *e, int rw ) assert( e->e_private ); -#ifdef LDBM_ENTRY_RWLOCK - cache_entry_rdwr_unlock(e, rw); -#endif - id = e->e_id; refcnt = --LEI(e)->lei_refcnt; @@ -217,7 +125,6 @@ cache_return_entry_rw( Cache *cache, Entry *e, int rw ) rw ? "w" : "r", id, refcnt ); #endif - } else if ( LEI(e)->lei_state == CACHE_ENTRY_DELETED ) { if( refcnt > 0 ) { /* free cache mutex */ @@ -233,7 +140,6 @@ cache_return_entry_rw( Cache *cache, Entry *e, int rw ) rw ? "w" : "r", id, refcnt ); #endif - } else { cache_entry_private_destroy( e ); if ( freeit ) { @@ -252,7 +158,6 @@ cache_return_entry_rw( Cache *cache, Entry *e, int rw ) "====> cache_return_entry_%s( %ld ): deleted (%d)\n", rw ? "w" : "r", id, refcnt ); #endif - } } else { @@ -268,7 +173,6 @@ cache_return_entry_rw( Cache *cache, Entry *e, int rw ) "====> cache_return_entry_%s( %ld ): returned (%d)\n", rw ? "w" : "r", id, refcnt); #endif - } } @@ -337,7 +241,6 @@ cache_add_entry_rw( e->e_id, e->e_dn, 0 ); #endif - return( -1 ); } @@ -357,7 +260,6 @@ cache_add_entry_rw( e->e_id, e->e_dn, 0 ); #endif - cache_entry_private_destroy(e); return( 1 ); @@ -398,10 +300,6 @@ cache_add_entry_rw( return( -1 ); } -#ifdef LDBM_ENTRY_RWLOCK - cache_entry_rdwr_lock( e, rw ); -#endif - /* put the entry into 'CREATING' state */ /* will be marked after when entry is returned */ LEI(e)->lei_state = CACHE_ENTRY_CREATING; @@ -483,7 +381,6 @@ cache_update_entry( e->e_id, e->e_dn, 0 ); #endif - /* free cache mutex */ ldap_pvt_thread_mutex_unlock( &cache->c_mutex ); return( 1 ); @@ -503,7 +400,6 @@ cache_update_entry( e->e_id, e->e_dn, 0 ); #endif - /* delete from dn tree inserted above */ if ( avl_delete( &cache->c_dntree, (caddr_t) e, (AVL_CMP) entry_dn_cmp ) == NULL ) @@ -516,7 +412,6 @@ cache_update_entry( Debug( LDAP_DEBUG_ANY, "====> can't delete from dn cache\n", 0, 0, 0 ); #endif - } /* free cache mutex */ @@ -524,7 +419,6 @@ cache_update_entry( return( -1 ); } - /* put the entry into 'CREATING' state */ /* will be marked after when entry is returned */ LEI(e)->lei_state = CACHE_ENTRY_CREATING; @@ -601,7 +495,6 @@ try_again: * we do not need to lock the entry if we only * check the state, refcnt, LRU, and id. */ - assert( ep->e_private ); /* save id */ @@ -627,7 +520,6 @@ try_again: ndn->bv_val, id, state); #endif - ldap_pvt_thread_yield(); goto try_again; } @@ -649,11 +541,9 @@ try_again: ndn->bv_val, id, count); #endif - } else { /* free cache mutex */ ldap_pvt_thread_mutex_unlock( &cache->c_mutex ); - id = NOID; } @@ -698,7 +588,6 @@ try_again: * entry is deleted or not fully created yet */ if ( state != CACHE_ENTRY_READY ) { - assert(state != CACHE_ENTRY_UNDEFINED); /* free cache mutex */ @@ -715,37 +604,9 @@ try_again: id, ep_id, state); #endif - - ldap_pvt_thread_yield(); - goto try_again; - } - -#ifdef LDBM_ENTRY_RWLOCK - /* acquire reader lock */ - if ( cache_entry_rdwr_trylock(ep, rw) == LDAP_PVT_THREAD_EBUSY ) { - /* could not acquire entry lock... - * owner cannot free as we have the cache locked. - * so, unlock the cache, yield, and try again. - */ - - /* free cache mutex */ - ldap_pvt_thread_mutex_unlock( &cache->c_mutex ); - -#ifdef NEW_LOGGING - LDAP_LOG(( "cache", LDAP_LEVEL_INFO, - "cache_find_entry_id: %ld -> %ld (busy) %d.\n", - id, ep_id, state )); -#else - Debug(LDAP_DEBUG_TRACE, - "====> cache_find_entry_id( %ld ): %ld (busy) %d\n", - id, ep_id, state); -#endif - - ldap_pvt_thread_yield(); goto try_again; } -#endif /* lru */ LRU_DELETE( cache, ep ); @@ -766,7 +627,6 @@ try_again: ep_id, ep->e_dn, count); #endif - return( ep ); } @@ -808,7 +668,6 @@ cache_delete_entry( e->e_id, 0, 0 ); #endif - rc = cache_delete_entry_internal( cache, e ); /* free cache mutex */ @@ -872,10 +731,6 @@ cache_release_all( Cache *cache ) while ( (e = cache->c_lrutail) != NULL && LEI(e)->lei_refcnt == 0 ) { -#ifdef LDAP_RDWR_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 ); @@ -890,7 +745,6 @@ cache_release_all( Cache *cache ) #else Debug( LDAP_DEBUG_TRACE, "Entry-cache could not be emptied\n", 0, 0, 0 ); #endif - } /* free cache mutex */ @@ -898,7 +752,6 @@ cache_release_all( Cache *cache ) } #ifdef LDAP_DEBUG - static void lru_print( Cache *cache ) { @@ -915,6 +768,4 @@ lru_print( Cache *cache ) e->e_dn, e->e_id, LEI(e)->lei_refcnt ); } } - #endif - -- 2.39.5