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| 1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* | |
| 3 * The contents of this file are subject to the Mozilla Public | |
| 4 * License Version 1.1 (the "License"); you may not use this file | |
| 5 * except in compliance with the License. You may obtain a copy of | |
| 6 * the License at http://www.mozilla.org/MPL/ | |
| 7 * | |
| 8 * Software distributed under the License is distributed on an "AS | |
| 9 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or | |
| 10 * implied. See the License for the specific language governing | |
| 11 * rights and limitations under the License. | |
| 12 * | |
| 13 * The Original Code is the Netscape Portable Runtime (NSPR). | |
| 14 * | |
| 15 * The Initial Developer of the Original Code is Netscape | |
| 16 * Communications Corporation. Portions created by Netscape are | |
| 17 * Copyright (C) 1998-2000 Netscape Communications Corporation. All | |
| 18 * Rights Reserved. | |
| 19 * | |
| 20 * Contributor(s): | |
| 21 * | |
| 22 * Alternatively, the contents of this file may be used under the | |
| 23 * terms of the GNU General Public License Version 2 or later (the | |
| 24 * "GPL"), in which case the provisions of the GPL are applicable | |
| 25 * instead of those above. If you wish to allow use of your | |
| 26 * version of this file only under the terms of the GPL and not to | |
| 27 * allow others to use your version of this file under the MPL, | |
| 28 * indicate your decision by deleting the provisions above and | |
| 29 * replace them with the notice and other provisions required by | |
| 30 * the GPL. If you do not delete the provisions above, a recipient | |
| 31 * may use your version of this file under either the MPL or the | |
| 32 * GPL. | |
| 33 */ | |
| 34 | |
| 35 /* | |
| 36 ** File: prlock.h | |
| 37 ** Description: API to basic locking functions of NSPR. | |
| 38 ** | |
| 39 ** | |
| 40 ** NSPR provides basic locking mechanisms for thread synchronization. Locks | |
| 41 ** are lightweight resource contention controls that prevent multiple threads | |
| 42 ** from accessing something (code/data) simultaneously. | |
| 43 **/ | |
| 44 | |
| 45 #ifndef prlock_h___ | |
| 46 #define prlock_h___ | |
| 47 | |
| 48 #include "prtypes.h" | |
| 49 | |
| 50 PR_BEGIN_EXTERN_C | |
| 51 | |
| 52 /**********************************************************************/ | |
| 53 /************************* TYPES AND CONSTANTS ************************/ | |
| 54 /**********************************************************************/ | |
| 55 | |
| 56 /* | |
| 57 * PRLock -- | |
| 58 * | |
| 59 * NSPR represents the lock as an opaque entity to the client of the | |
| 60 * API. All routines operate on a pointer to this opaque entity. | |
| 61 */ | |
| 62 | |
| 63 typedef struct PRLock PRLock; | |
| 64 | |
| 65 /**********************************************************************/ | |
| 66 /****************************** FUNCTIONS *****************************/ | |
| 67 /**********************************************************************/ | |
| 68 | |
| 69 /*********************************************************************** | |
| 70 ** FUNCTION: PR_NewLock | |
| 71 ** DESCRIPTION: | |
| 72 ** Returns a pointer to a newly created opaque lock object. | |
| 73 ** INPUTS: void | |
| 74 ** OUTPUTS: void | |
| 75 ** RETURN: PRLock* | |
| 76 ** If the lock can not be created because of resource constraints, NULL | |
| 77 ** is returned. | |
| 78 ** | |
| 79 ***********************************************************************/ | |
| 80 NSPR_API(PRLock*) PR_NewLock(void); | |
| 81 | |
| 82 /*********************************************************************** | |
| 83 ** FUNCTION: PR_DestroyLock | |
| 84 ** DESCRIPTION: | |
| 85 ** Destroys a given opaque lock object. | |
| 86 ** INPUTS: PRLock *lock | |
| 87 ** Lock to be freed. | |
| 88 ** OUTPUTS: void | |
| 89 ** RETURN: None | |
| 90 ***********************************************************************/ | |
| 91 NSPR_API(void) PR_DestroyLock(PRLock *lock); | |
| 92 | |
| 93 /*********************************************************************** | |
| 94 ** FUNCTION: PR_Lock | |
| 95 ** DESCRIPTION: | |
| 96 ** Lock a lock. | |
| 97 ** INPUTS: PRLock *lock | |
| 98 ** Lock to locked. | |
| 99 ** OUTPUTS: void | |
| 100 ** RETURN: None | |
| 101 ***********************************************************************/ | |
| 102 NSPR_API(void) PR_Lock(PRLock *lock); | |
| 103 | |
| 104 /*********************************************************************** | |
| 105 ** FUNCTION: PR_Unlock | |
| 106 ** DESCRIPTION: | |
| 107 ** Unlock a lock. Unlocking an unlocked lock has undefined results. | |
| 108 ** INPUTS: PRLock *lock | |
| 109 ** Lock to unlocked. | |
| 110 ** OUTPUTS: void | |
| 111 ** RETURN: PR_STATUS | |
| 112 ** Returns PR_FAILURE if the caller does not own the lock. | |
| 113 ***********************************************************************/ | |
| 114 NSPR_API(PRStatus) PR_Unlock(PRLock *lock); | |
| 115 | |
| 116 PR_END_EXTERN_C | |
| 117 | |
| 118 #endif /* prlock_h___ */ | |
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Chromium Code Reviews
Issue 665543002:
Remove third_party/npapi/npspy. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master