diff options
Diffstat (limited to 'security/nss/lib/pk11wrap/pk11list.c')
| -rw-r--r-- | security/nss/lib/pk11wrap/pk11list.c | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/security/nss/lib/pk11wrap/pk11list.c b/security/nss/lib/pk11wrap/pk11list.c deleted file mode 100644 index 67bef9573..000000000 --- a/security/nss/lib/pk11wrap/pk11list.c +++ /dev/null @@ -1,169 +0,0 @@ -/* - * 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. - */ -/* - * Locking and queue management primatives - * - */ - -#include "seccomon.h" -#include "nssilock.h" -#include "prmon.h" -#include "secmod.h" -#include "secmodi.h" -#include "prlong.h" - -#define ISREADING 1 -#define ISWRITING 2 -#define WANTWRITE 4 -#define ISLOCKED 3 - -/* - * create a new lock for a Module List - */ -SECMODListLock *SECMOD_NewListLock() { - SECMODListLock *modLock; - - modLock = (SECMODListLock*)PORT_Alloc(sizeof(SECMODListLock)); -#ifdef PKCS11_USE_THREADS - modLock->mutex = NULL; - modLock->monitor = PZ_NewMonitor(nssILockList); -#else - modLock->mutex = NULL; - modLock->monitor = NULL; -#endif - modLock->state = 0; - modLock->count = 0; - return modLock; -} - -/* - * destroy the lock - */ -void SECMOD_DestroyListLock(SECMODListLock *lock) { - PK11_USE_THREADS(PZ_DestroyMonitor(lock->monitor);) - PORT_Free(lock); -} - - -/* - * Lock the List for Read: NOTE: this assumes the reading isn't so common - * the writing will be starved. - */ -void SECMOD_GetReadLock(SECMODListLock *modLock) { -#ifdef PKCS11_USE_THREADS - if (modLock == NULL) return; - PZ_EnterMonitor(modLock->monitor); - while (modLock->state & ISWRITING) { - PZ_Wait(modLock->monitor,PR_INTERVAL_NO_TIMEOUT); /* wait until woken up */ - } - modLock->state |= ISREADING; - modLock->count++; - PZ_ExitMonitor(modLock->monitor); -#endif -} - -/* - * Release the Read lock - */ -void SECMOD_ReleaseReadLock(SECMODListLock *modLock) { -#ifdef PKCS11_USE_THREADS - if (modLock == NULL) return; - PZ_EnterMonitor(modLock->monitor); - modLock->count--; - if (modLock->count == 0) { - modLock->state &= ~ISREADING; - if (modLock->state & WANTWRITE) { - PZ_Notify(modLock->monitor); /* only one writer at a time */ - } - } - PZ_ExitMonitor(modLock->monitor); -#endif -} - - -/* - * lock the list for Write - */ -void SECMOD_GetWriteLock(SECMODListLock *modLock) { -#ifdef PKCS11_USE_THREADS - if (modLock == NULL) return; - PZ_EnterMonitor(modLock->monitor); - while (modLock->state & ISLOCKED) { - modLock->state |= WANTWRITE; - PZ_Wait(modLock->monitor,PR_INTERVAL_NO_TIMEOUT); /* wait until woken up */ - } - modLock->state = ISWRITING; - PZ_ExitMonitor(modLock->monitor); -#endif -} - - -/* - * Release the Write Lock: NOTE, this code is pretty inefficient if you have - * lots of write collisions. - */ -void SECMOD_ReleaseWriteLock(SECMODListLock *modLock) { -#ifdef PKCS11_USE_THREADS - if (modLock == NULL) return; - PZ_EnterMonitor(modLock->monitor); - modLock->state = 0; - PR_NotifyAll(modLock->monitor); /* enable all the readers */ - PZ_ExitMonitor(modLock->monitor); -#endif -} - - -/* - * must Hold the Write lock - */ -void -SECMOD_RemoveList(SECMODModuleList **parent, SECMODModuleList *child) { - *parent = child->next; - child->next = NULL; -} - -/* - * if lock is not specified, it must already be held - */ -void -SECMOD_AddList(SECMODModuleList *parent, SECMODModuleList *child, - SECMODListLock *lock) { - if (lock) { SECMOD_GetWriteLock(lock); } - - child->next = parent->next; - parent->next = child; - - if (lock) { SECMOD_ReleaseWriteLock(lock); } -} - - |