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2ec893d315
// FREEBIE
20 lines
640 B
Swift
20 lines
640 B
Swift
//
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// Copyright (c) 2017 Open Whisper Systems. All rights reserved.
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//
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import PromiseKit
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public extension Promise {
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/**
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* Sometimes there isn't a straight forward candidate to retain a promise, in that case we tell the
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* promise to self retain, until it completes to avoid the risk it's GC'd before completion.
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*/
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func retainUntilComplete() {
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// Unfortunately, there is (currently) no way to surpress the
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// compiler warning: "Variable 'retainCycle' was written to, but never read"
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var retainCycle: Promise<T>? = self
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self.always {
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retainCycle = nil
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}
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}
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}
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