40 lines
745 B
Swift
40 lines
745 B
Swift
//
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// Semaphore.swift
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// XIONControlPanel
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//
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// Created by Charles Magahern on 1/18/16.
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// Copyright © 2016 XION. All rights reserved.
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//
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import Foundation
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class Semaphore
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{
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private var _semaphore: dispatch_semaphore_t
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init(value: Int)
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{
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_semaphore = dispatch_semaphore_create(value)
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}
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func wait()
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{
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self.wait(nil)
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}
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func wait(untilDate: NSDate?)
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{
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var time: dispatch_time_t = DISPATCH_TIME_FOREVER
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if (untilDate != nil) {
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time = UInt64(untilDate!.timeIntervalSinceNow) * NSEC_PER_SEC
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}
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dispatch_semaphore_wait(_semaphore, time)
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}
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func signal()
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{
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dispatch_semaphore_signal(_semaphore)
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}
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}
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