/* * Copyright (c) 2017 Apple Inc. All Rights Reserved. * * @APPLE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ #import "keychain/ckks/CKKSCondition.h" @interface CKKSCondition () @property dispatch_semaphore_t semaphore; @property CKKSCondition* chain; @end @implementation CKKSCondition -(instancetype)init { return [self initToChain:nil]; } -(instancetype)initToChain:(CKKSCondition*)chain { if((self = [super init])) { _semaphore = dispatch_semaphore_create(0); _chain = chain; } return self; } -(void)fulfill { dispatch_semaphore_signal(self.semaphore); [self.chain fulfill]; self.chain = nil; // break the retain, since that condition is filled } -(long)wait:(uint64_t)timeout { long result = dispatch_semaphore_wait(self.semaphore, dispatch_time(DISPATCH_TIME_NOW, timeout)); // If we received a go-ahead from the semaphore, replace the signal if(0 == result) { dispatch_semaphore_signal(self.semaphore); } return result; } @end