diff options
Diffstat (limited to 'security/nss/lib/ckfw/mutex.c')
| -rw-r--r-- | security/nss/lib/ckfw/mutex.c | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/security/nss/lib/ckfw/mutex.c b/security/nss/lib/ckfw/mutex.c new file mode 100644 index 000000000..ad714b8f2 --- /dev/null +++ b/security/nss/lib/ckfw/mutex.c @@ -0,0 +1,305 @@ +/* ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0/LGPL 2.1 + * + * 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 the Initial Developer are Copyright (C) 1994-2000 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * + * Alternatively, the contents of this file may be used under the terms of + * either the GNU General Public License Version 2 or later (the "GPL"), or + * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), + * in which case the provisions of the GPL or the LGPL are applicable instead + * of those above. If you wish to allow use of your version of this file only + * under the terms of either the GPL or the LGPL, and not to allow others to + * use your version of this file under the terms of the MPL, indicate your + * decision by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL or the LGPL. If you do not delete + * the provisions above, a recipient may use your version of this file under + * the terms of any one of the MPL, the GPL or the LGPL. + * + * ***** END LICENSE BLOCK ***** */ + +#ifdef DEBUG +static const char CVS_ID[] = "@(#) $RCSfile$ $Revision$ $Date$"; +#endif /* DEBUG */ + +/* + * mutex.c + * + * This file implements a mutual-exclusion locking facility for Modules + * using the NSS Cryptoki Framework. + */ + +#ifndef CK_T +#include "ck.h" +#endif /* CK_T */ + +/* + * NSSCKFWMutex + * + * NSSCKFWMutex_Destroy + * NSSCKFWMutex_Lock + * NSSCKFWMutex_Unlock + * + * nssCKFWMutex_Create + * nssCKFWMutex_Destroy + * nssCKFWMutex_Lock + * nssCKFWMutex_Unlock + * + * -- debugging versions only -- + * nssCKFWMutex_verifyPointer + * + */ + +struct NSSCKFWMutexStr { + PRLock *lock; +}; + +#ifdef DEBUG +/* + * But first, the pointer-tracking stuff. + * + * NOTE: the pointer-tracking support in NSS/base currently relies + * upon NSPR's CallOnce support. That, however, relies upon NSPR's + * locking, which is tied into the runtime. We need a pointer-tracker + * implementation that uses the locks supplied through C_Initialize. + * That support, however, can be filled in later. So for now, I'll + * just do this routines as no-ops. + */ + +static CK_RV +mutex_add_pointer +( + const NSSCKFWMutex *fwMutex +) +{ + return CKR_OK; +} + +static CK_RV +mutex_remove_pointer +( + const NSSCKFWMutex *fwMutex +) +{ + return CKR_OK; +} + +NSS_IMPLEMENT CK_RV +nssCKFWMutex_verifyPointer +( + const NSSCKFWMutex *fwMutex +) +{ + return CKR_OK; +} + +#endif /* DEBUG */ + +/* + * nssCKFWMutex_Create + * + */ +NSS_EXTERN NSSCKFWMutex * +nssCKFWMutex_Create +( + CK_C_INITIALIZE_ARGS_PTR pInitArgs, + CryptokiLockingState LockingState, + NSSArena *arena, + CK_RV *pError +) +{ + NSSCKFWMutex *mutex; + + mutex = nss_ZNEW(arena, NSSCKFWMutex); + if (!mutex) { + *pError = CKR_HOST_MEMORY; + return (NSSCKFWMutex *)NULL; + } + *pError = CKR_OK; + mutex->lock = NULL; + if (LockingState == MultiThreaded) { + mutex->lock = PR_NewLock(); + if (!mutex->lock) { + *pError = CKR_HOST_MEMORY; /* we couldn't get the resource */ + } + } + + if( CKR_OK != *pError ) { + (void)nss_ZFreeIf(mutex); + return (NSSCKFWMutex *)NULL; + } + +#ifdef DEBUG + *pError = mutex_add_pointer(mutex); + if( CKR_OK != *pError ) { + if (mutex->lock) { + PR_DestroyLock(mutex->lock); + } + (void)nss_ZFreeIf(mutex); + return (NSSCKFWMutex *)NULL; + } +#endif /* DEBUG */ + + return mutex; +} + +/* + * nssCKFWMutex_Destroy + * + */ +NSS_EXTERN CK_RV +nssCKFWMutex_Destroy +( + NSSCKFWMutex *mutex +) +{ + CK_RV rv = CKR_OK; + +#ifdef NSSDEBUG + rv = nssCKFWMutex_verifyPointer(mutex); + if( CKR_OK != rv ) { + return rv; + } +#endif /* NSSDEBUG */ + + if (mutex->lock) { + PR_DestroyLock(mutex->lock); + } + +#ifdef DEBUG + (void)mutex_remove_pointer(mutex); +#endif /* DEBUG */ + + (void)nss_ZFreeIf(mutex); + return rv; +} + +/* + * nssCKFWMutex_Lock + * + */ +NSS_EXTERN CK_RV +nssCKFWMutex_Lock +( + NSSCKFWMutex *mutex +) +{ +#ifdef NSSDEBUG + CK_RV rv = nssCKFWMutex_verifyPointer(mutex); + if( CKR_OK != rv ) { + return rv; + } +#endif /* NSSDEBUG */ + if (mutex->lock) { + PR_Lock(mutex->lock); + } + + return CKR_OK; +} + +/* + * nssCKFWMutex_Unlock + * + */ +NSS_EXTERN CK_RV +nssCKFWMutex_Unlock +( + NSSCKFWMutex *mutex +) +{ + PRStatus nrv; +#ifdef NSSDEBUG + CK_RV rv = nssCKFWMutex_verifyPointer(mutex); + + if( CKR_OK != rv ) { + return rv; + } +#endif /* NSSDEBUG */ + + if (!mutex->lock) + return CKR_OK; + + nrv = PR_Unlock(mutex->lock); + + /* if unlock fails, either we have a programming error, or we have + * some sort of hardware failure... in either case return CKR_DEVICE_ERROR. + */ + return nrv == PR_SUCCESS ? CKR_OK : CKR_DEVICE_ERROR; +} + +/* + * NSSCKFWMutex_Destroy + * + */ +NSS_EXTERN CK_RV +NSSCKFWMutex_Destroy +( + NSSCKFWMutex *mutex +) +{ +#ifdef DEBUG + CK_RV rv = nssCKFWMutex_verifyPointer(mutex); + if( CKR_OK != rv ) { + return rv; + } +#endif /* DEBUG */ + + return nssCKFWMutex_Destroy(mutex); +} + +/* + * NSSCKFWMutex_Lock + * + */ +NSS_EXTERN CK_RV +NSSCKFWMutex_Lock +( + NSSCKFWMutex *mutex +) +{ +#ifdef DEBUG + CK_RV rv = nssCKFWMutex_verifyPointer(mutex); + if( CKR_OK != rv ) { + return rv; + } +#endif /* DEBUG */ + + return nssCKFWMutex_Lock(mutex); +} + +/* + * NSSCKFWMutex_Unlock + * + */ +NSS_EXTERN CK_RV +NSSCKFWMutex_Unlock +( + NSSCKFWMutex *mutex +) +{ +#ifdef DEBUG + CK_RV rv = nssCKFWMutex_verifyPointer(mutex); + if( CKR_OK != rv ) { + return rv; + } +#endif /* DEBUG */ + + return nssCKFWMutex_Unlock(mutex); +} + |