/* * 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 <Foundation/Foundation.h> #import <dispatch/dispatch.h> /* * CKKSCondition is for implementing one-shot condition variables, * based on libdispatch semaphores (which might use condition variables underneath). */ @interface CKKSCondition : NSObject -(instancetype)init; /* Fulfills the condition. Can only be called once per CKKSCondition. */ -(void)fulfill; /* Wait for the the condition to be fulfilled. The returned result behaves exactly like libdispatch's dispatch_semaphore_wait. */ -(long)wait:(uint64_t)timeout; @end