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Diffstat (limited to 'security/nss/lib/ckfw/mutex.c')
| -rw-r--r-- | security/nss/lib/ckfw/mutex.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/security/nss/lib/ckfw/mutex.c b/security/nss/lib/ckfw/mutex.c new file mode 100644 index 0000000000..be569e196a --- /dev/null +++ b/security/nss/lib/ckfw/mutex.c @@ -0,0 +1,248 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* + * 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); +} |