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Update handling of os_unfair_lock to manage the buffer. #2836

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merged 1 commit into from Jun 14, 2019
Merged

Update handling of os_unfair_lock to manage the buffer. #2836

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16 changes: 13 additions & 3 deletions Source/Protector.swift
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Expand Up @@ -28,14 +28,24 @@ import Foundation

/// An `os_unfair_lock` wrapper.
final class UnfairLock {
private var unfairLock = os_unfair_lock()
private let unfairLock: os_unfair_lock_t

init() {
unfairLock = .allocate(capacity: 1)
unfairLock.initialize(to: os_unfair_lock())
}

deinit {
unfairLock.deinitialize(count: 1)
unfairLock.deallocate()
}

fileprivate func lock() {
os_unfair_lock_lock(&unfairLock)
os_unfair_lock_lock(unfairLock)
}

fileprivate func unlock() {
os_unfair_lock_unlock(&unfairLock)
os_unfair_lock_unlock(unfairLock)
}

/// Executes a closure returning a value while acquiring the lock.
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