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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 /* | |
| 5 * Locking and queue management primatives | |
| 6 * | |
| 7 */ | |
| 8 | |
| 9 #include "seccomon.h" | |
| 10 #include "nssilock.h" | |
| 11 #include "secmod.h" | |
| 12 #include "secmodi.h" | |
| 13 #include "secmodti.h" | |
| 14 #include "nssrwlk.h" | |
| 15 | |
| 16 /* | |
| 17 * create a new lock for a Module List | |
| 18 */ | |
| 19 SECMODListLock *SECMOD_NewListLock() | |
| 20 { | |
| 21 return NSSRWLock_New( 10, "moduleListLock"); | |
| 22 } | |
| 23 | |
| 24 /* | |
| 25 * destroy the lock | |
| 26 */ | |
| 27 void SECMOD_DestroyListLock(SECMODListLock *lock) | |
| 28 { | |
| 29 NSSRWLock_Destroy(lock); | |
| 30 } | |
| 31 | |
| 32 | |
| 33 /* | |
| 34 * Lock the List for Read: NOTE: this assumes the reading isn't so common | |
| 35 * the writing will be starved. | |
| 36 */ | |
| 37 void SECMOD_GetReadLock(SECMODListLock *modLock) | |
| 38 { | |
| 39 NSSRWLock_LockRead(modLock); | |
| 40 } | |
| 41 | |
| 42 /* | |
| 43 * Release the Read lock | |
| 44 */ | |
| 45 void SECMOD_ReleaseReadLock(SECMODListLock *modLock) | |
| 46 { | |
| 47 NSSRWLock_UnlockRead(modLock); | |
| 48 } | |
| 49 | |
| 50 | |
| 51 /* | |
| 52 * lock the list for Write | |
| 53 */ | |
| 54 void SECMOD_GetWriteLock(SECMODListLock *modLock) | |
| 55 { | |
| 56 NSSRWLock_LockWrite(modLock); | |
| 57 } | |
| 58 | |
| 59 | |
| 60 /* | |
| 61 * Release the Write Lock: NOTE, this code is pretty inefficient if you have | |
| 62 * lots of write collisions. | |
| 63 */ | |
| 64 void SECMOD_ReleaseWriteLock(SECMODListLock *modLock) | |
| 65 { | |
| 66 NSSRWLock_UnlockWrite(modLock); | |
| 67 } | |
| 68 | |
| 69 | |
| 70 /* | |
| 71 * must Hold the Write lock | |
| 72 */ | |
| 73 void | |
| 74 SECMOD_RemoveList(SECMODModuleList **parent, SECMODModuleList *child) | |
| 75 { | |
| 76 *parent = child->next; | |
| 77 child->next = NULL; | |
| 78 } | |
| 79 | |
| 80 /* | |
| 81 * if lock is not specified, it must already be held | |
| 82 */ | |
| 83 void | |
| 84 SECMOD_AddList(SECMODModuleList *parent, SECMODModuleList *child, | |
| 85 SECMODListLock *lock) | |
| 86 { | |
| 87 if (lock) { SECMOD_GetWriteLock(lock); } | |
| 88 | |
| 89 child->next = parent->next; | |
| 90 parent->next = child; | |
| 91 | |
| 92 if (lock) { SECMOD_ReleaseWriteLock(lock); } | |
| 93 } | |
| 94 | |
| 95 | |
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Chromium Code Reviews
Issue 2078763002:
Delete bundled copy of NSS and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/nss@master