find.c
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上传日期:2007-01-12
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文件大小:5k
- /*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is the Netscape security libraries.
- *
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1994-2000 Netscape Communications Corporation. All
- * Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
- #ifdef DEBUG
- static const char CVS_ID[] = "@(#) $RCSfile: find.c,v $ $Revision: 1.2 $ $Date: 2000/05/15 20:58:19 $ $Name: NSS_3_1_1_RTM $";
- #endif /* DEBUG */
- #include "ckdbm.h"
- static void
- nss_dbm_mdFindObjects_Final
- (
- NSSCKMDFindObjects *mdFindObjects,
- NSSCKFWFindObjects *fwFindObjects,
- NSSCKMDSession *mdSession,
- NSSCKFWSession *fwSession,
- NSSCKMDToken *mdToken,
- NSSCKFWToken *fwToken,
- NSSCKMDInstance *mdInstance,
- NSSCKFWInstance *fwInstance
- )
- {
- nss_dbm_find_t *find = (nss_dbm_find_t *)mdFindObjects->etc;
- /* Locks might have system resources associated */
- (void)NSSCKFWMutex_Destroy(find->list_lock);
- (void)NSSArena_Destroy(find->arena);
- }
- static NSSCKMDObject *
- nss_dbm_mdFindObjects_Next
- (
- NSSCKMDFindObjects *mdFindObjects,
- NSSCKFWFindObjects *fwFindObjects,
- NSSCKMDSession *mdSession,
- NSSCKFWSession *fwSession,
- NSSCKMDToken *mdToken,
- NSSCKFWToken *fwToken,
- NSSCKMDInstance *mdInstance,
- NSSCKFWInstance *fwInstance,
- NSSArena *arena,
- CK_RV *pError
- )
- {
- nss_dbm_find_t *find = (nss_dbm_find_t *)mdFindObjects->etc;
- struct nss_dbm_dbt_node *node;
- nss_dbm_object_t *object;
- NSSCKMDObject *rv;
- while(1) {
- /* Lock */
- {
- *pError = NSSCKFWMutex_Lock(find->list_lock);
- if( CKR_OK != *pError ) {
- return (NSSCKMDObject *)NULL;
- }
-
- node = find->found;
- if( (struct nss_dbm_dbt_node *)NULL != node ) {
- find->found = node->next;
- }
-
- *pError = NSSCKFWMutex_Unlock(find->list_lock);
- if( CKR_OK != *pError ) {
- /* screwed now */
- return (NSSCKMDObject *)NULL;
- }
- }
- if( (struct nss_dbm_dbt_node *)NULL == node ) {
- break;
- }
- if( nss_dbm_db_object_still_exists(node->dbt) ) {
- break;
- }
- }
- if( (struct nss_dbm_dbt_node *)NULL == node ) {
- *pError = CKR_OK;
- return (NSSCKMDObject *)NULL;
- }
- object = nss_ZNEW(arena, nss_dbm_object_t);
- if( (nss_dbm_object_t *)NULL == object ) {
- *pError = CKR_HOST_MEMORY;
- return (NSSCKMDObject *)NULL;
- }
- object->arena = arena;
- object->handle = nss_ZNEW(arena, nss_dbm_dbt_t);
- if( (nss_dbm_dbt_t *)NULL == object->handle ) {
- *pError = CKR_HOST_MEMORY;
- return (NSSCKMDObject *)NULL;
- }
- object->handle->my_db = node->dbt->my_db;
- object->handle->dbt.size = node->dbt->dbt.size;
- object->handle->dbt.data = nss_ZAlloc(arena, node->dbt->dbt.size);
- if( (void *)NULL == object->handle->dbt.data ) {
- *pError = CKR_HOST_MEMORY;
- return (NSSCKMDObject *)NULL;
- }
- (void)memcpy(object->handle->dbt.data, node->dbt->dbt.data, node->dbt->dbt.size);
- rv = nss_dbm_mdObject_factory(object, pError);
- if( (NSSCKMDObject *)NULL == rv ) {
- return (NSSCKMDObject *)NULL;
- }
- return rv;
- }
- NSS_IMPLEMENT NSSCKMDFindObjects *
- nss_dbm_mdFindObjects_factory
- (
- nss_dbm_find_t *find,
- CK_RV *pError
- )
- {
- NSSCKMDFindObjects *rv;
- rv = nss_ZNEW(find->arena, NSSCKMDFindObjects);
- if( (NSSCKMDFindObjects *)NULL == rv ) {
- *pError = CKR_HOST_MEMORY;
- return (NSSCKMDFindObjects *)NULL;
- }
- rv->etc = (void *)find;
- rv->Final = nss_dbm_mdFindObjects_Final;
- rv->Next = nss_dbm_mdFindObjects_Next;
- return rv;
- }