/** BEGIN COPYRIGHT BLOCK * Copyright 2001 Sun Microsystems, Inc. * Portions copyright 1999, 2001-2003 Netscape Communications Corporation. * All rights reserved. * END COPYRIGHT BLOCK **/ /* * Source file for the ACL_CacheFlush-related routines. */ #include #include #include #include "aclpriv.h" #include #include #include #include "aclcache.h" #include extern void ACL_DatabaseDestroy(void); PRIntn deletelists(PRHashEntry *he, PRIntn i, void *arg) { ACLListHandle_t *acllist=(ACLListHandle_t *)he->value; NSErr_t *errp = 0; NS_ASSERT(he); NS_ASSERT(he->value); if (acllist->ref_count) { // If the list is in use, increment the counter. Then set the // stale flag. The other user can't delete the list since we're // counted as well. Finally, decrement the counter and whoever // sets it to zero will delete the ACL List. NS_ASSERT(ACL_CritHeld()); acllist->ref_count++; acllist->flags |= ACL_LIST_STALE; if (--acllist->ref_count == 0) ACL_ListDestroy(errp, acllist); } else { ACL_ListDestroy(errp, acllist); } return 0; } PRIntn restartdeletelists(PRHashEntry *he, PRIntn i, void *arg) { NSErr_t *errp = 0; // Cannot be anyone left using the lists, so just free them no matter // what. ACLListHandle_t *acllist=(ACLListHandle_t *)he->value; NS_ASSERT(he); NS_ASSERT(he->value); ACL_ListDestroy(errp, acllist); return 0; } static AclCacheFlushFunc_t AclCacheFlushRoutine = NULL; NSAPI_PUBLIC int ACL_CacheFlushRegister(AclCacheFlushFunc_t flush_func) { NS_ASSERT(flush_func); AclCacheFlushRoutine = flush_func; return 0; } NSAPI_PUBLIC int ACL_CacheFlush(void) { ACLGlobal_p newACLGlobal; NSErr_t *errp = 0; NS_ASSERT(ACLGlobal); NS_ASSERT(ACLGlobal->masterlist); NS_ASSERT(ACLGlobal->listhash); NS_ASSERT(ACLGlobal->urihash); NS_ASSERT(ACLGlobal->urigethash); NS_ASSERT(ACLGlobal->pool); ACL_CritEnter(); // Swap the pointers. Keep using the current database/method tables // until the new ones are built. This is a kludge. An in-progress // evaluation could conceivably get messed up, but the window seems // small. newACLGlobal = oldACLGlobal; oldACLGlobal = ACLGlobal; ACLGlobal = newACLGlobal; // Prepare the new ACLGlobal structure ACL_UriHashInit(); /* Also initializes ACLGlobal->pool */ ACL_ListHashInit(); ACLGlobal->evalhash = oldACLGlobal->evalhash; ACLGlobal->flushhash = oldACLGlobal->flushhash; ACLGlobal->methodhash = oldACLGlobal->methodhash; ACLGlobal->dbtypehash = oldACLGlobal->dbtypehash; ACLGlobal->dbnamehash = oldACLGlobal->dbnamehash; ACLGlobal->attrgetterhash = oldACLGlobal->attrgetterhash; ACLGlobal->databasepool = oldACLGlobal->databasepool; ACLGlobal->methodpool = oldACLGlobal->methodpool; // Mark all existing ACL Lists as stale. Delete any unreferenced ones. PR_HashTableEnumerateEntries(oldACLGlobal->listhash, deletelists, NULL); // Delete the old master list. ACL_ListDestroy(errp, oldACLGlobal->masterlist); oldACLGlobal->masterlist = NULL; PR_HashTableDestroy(oldACLGlobal->listhash); oldACLGlobal->listhash = NULL; PR_HashTableDestroy(oldACLGlobal->urihash); oldACLGlobal->urihash = NULL; PR_HashTableDestroy(oldACLGlobal->urigethash); oldACLGlobal->urigethash = NULL; pool_destroy(oldACLGlobal->pool); oldACLGlobal->pool = NULL; memset(oldACLGlobal, 0, sizeof(ACLGlobal_s)); // Read in the ACLs again in lib/frame if (AclCacheFlushRoutine) { (*AclCacheFlushRoutine)(); } ACL_CritExit(); return 0; } NSAPI_PUBLIC void ACL_Restart(void *clntData) { NSErr_t *errp = 0; NS_ASSERT(ACLGlobal); NS_ASSERT(ACLGlobal->masterlist); NS_ASSERT(ACLGlobal->listhash); NS_ASSERT(ACLGlobal->urihash); NS_ASSERT(ACLGlobal->urigethash); NS_ASSERT(ACLGlobal->pool); // Unlike ACL_CacheFlush, this routine can be much more cavalier about // freeing up memory, since there's guaranteed to be no users about at // this time. ACL_DatabaseDestroy(); ACL_MethodSetDefault(errp, ACL_METHOD_INVALID); // Mark all existing ACL Lists as stale. Delete any unreferenced ones // (i.e. all of them) PR_HashTableEnumerateEntries(ACLGlobal->listhash, restartdeletelists, NULL); // Delete the master list. ACL_ListDestroy(errp, ACLGlobal->masterlist); ACL_LasHashDestroy(); PR_HashTableDestroy(ACLGlobal->listhash); PR_HashTableDestroy(ACLGlobal->urihash); PR_HashTableDestroy(ACLGlobal->urigethash); pool_destroy(ACLGlobal->pool); PERM_FREE(ACLGlobal); ACLGlobal = NULL; PERM_FREE(oldACLGlobal); oldACLGlobal = NULL; return; }