| | 1 | /* |
| | 2 | * Copyright (c) 2017 Apple Inc. All Rights Reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * This file contains Original Code and/or Modifications of Original Code |
| | 7 | * as defined in and that are subject to the Apple Public Source License |
| | 8 | * Version 2.0 (the 'License'). You may not use this file except in |
| | 9 | * compliance with the License. Please obtain a copy of the License at |
| | 10 | * http://www.opensource.apple.com/apsl/ and read it before using this |
| | 11 | * file. |
| | 12 | * |
| | 13 | * The Original Code and all software distributed under the License are |
| | 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 18 | * Please see the License for the specific language governing rights and |
| | 19 | * limitations under the License. |
| | 20 | * |
| | 21 | * @APPLE_LICENSE_HEADER_END@ |
| | 22 | */ |
| | 23 | |
| | 24 | #import "keychain/ckks/CKKSCondition.h" |
| | 25 | |
| | 26 | @interface CKKSCondition () |
| | 27 | @property dispatch_semaphore_t semaphore; |
| | 28 | @property CKKSCondition* chain; |
| | 29 | @end |
| | 30 | |
| | 31 | @implementation CKKSCondition |
| | 32 | |
| | 33 | -(instancetype)init { |
| | 34 | return [self initToChain:nil]; |
| | 35 | } |
| | 36 | |
| | 37 | -(instancetype)initToChain:(CKKSCondition*)chain |
| | 38 | { |
| | 39 | if((self = [super init])) { |
| | 40 | _semaphore = dispatch_semaphore_create(0); |
| | 41 | _chain = chain; |
| | 42 | } |
| | 43 | return self; |
| | 44 | } |
| | 45 | |
| | 46 | -(void)fulfill { |
| | 47 | dispatch_semaphore_signal(self.semaphore); |
| | 48 | [self.chain fulfill]; |
| | 49 | self.chain = nil; // break the retain, since that condition is filled |
| | 50 | } |
| | 51 | |
| | 52 | -(long)wait:(uint64_t)timeout { |
| | 53 | long result = dispatch_semaphore_wait(self.semaphore, dispatch_time(DISPATCH_TIME_NOW, timeout)); |
| | 54 | |
| | 55 | // If we received a go-ahead from the semaphore, replace the signal |
| | 56 | if(0 == result) { |
| | 57 | dispatch_semaphore_signal(self.semaphore); |
| | 58 | } |
| | 59 | |
| | 60 | return result; |
| | 61 | } |
| | 62 | |
| | 63 | @end |
| | 64 | |
projects / apple / security.git / blame_incremental