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Introduce AttributedString #3055
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53 changes: 53 additions & 0 deletions
53
Sources/Foundation/AttributedString/AttributedString+Locking.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| //===----------------------------------------------------------------------===// | ||
| // | ||
| // This source file is part of the Swift.org open source project | ||
| // | ||
| // Copyright (c) 2021 Apple Inc. and the Swift project authors | ||
| // Licensed under Apache License v2.0 with Runtime Library Exception | ||
| // | ||
| // See https://swift.org/LICENSE.txt for license information | ||
| // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors | ||
| // | ||
| //===----------------------------------------------------------------------===// | ||
|
|
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| #if canImport(Darwin) | ||
| import Darwin | ||
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| @available(macOS 10.12, iOS 10.0, tvOS 10.0, watchOS 3.0, *) | ||
| extension UnsafeMutablePointer where Pointee == os_unfair_lock_s { | ||
| internal init() { | ||
| let l = UnsafeMutablePointer.allocate(capacity: 1) | ||
| l.initialize(to: os_unfair_lock()) | ||
| self = l | ||
| } | ||
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| internal func cleanupLock() { | ||
| deinitialize(count: 1) | ||
| deallocate() | ||
| } | ||
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| internal func lock() { | ||
| os_unfair_lock_lock(self) | ||
| } | ||
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| internal func tryLock() -> Bool { | ||
| let result = os_unfair_lock_trylock(self) | ||
| return result | ||
| } | ||
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| internal func unlock() { | ||
| os_unfair_lock_unlock(self) | ||
| } | ||
| } | ||
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| @available(macOS 10.12, iOS 10.0, tvOS 10.0, watchOS 3.0, *) | ||
| typealias Lock = os_unfair_lock_t | ||
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| #else | ||
| internal typealias Lock = NSLock | ||
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| extension NSLock { | ||
| // Stub to match the API of os_unfair_lock_t | ||
| func cleanupLock() { /* NOOP */ } | ||
| } | ||
| #endif | ||
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