37 lines
1.0 KiB
Swift
37 lines
1.0 KiB
Swift
import Foundation
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final class RDEPUBPageCountCache {
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private var storage: [RDEPUBChapterCacheKey: RDEPUBRuntimePageCount] = [:]
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private let lock = NSLock()
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subscript(key: RDEPUBChapterCacheKey) -> RDEPUBRuntimePageCount? {
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get {
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lock.lock()
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defer { lock.unlock() }
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return storage[key]
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}
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set {
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lock.lock()
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defer { lock.unlock() }
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storage[key] = newValue
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}
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}
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func entriesForSpineIndex(_ spineIndex: Int) -> [(RDEPUBChapterCacheKey, RDEPUBRuntimePageCount)] {
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lock.lock()
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defer { lock.unlock() }
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return storage.filter { $0.value.spineIndex == spineIndex }.map { ($0.key, $0.value) }
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}
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func remove(forSpineIndex spineIndex: Int) {
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lock.lock()
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defer { lock.unlock() }
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storage = storage.filter { $0.value.spineIndex != spineIndex }
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}
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func removeAll() {
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lock.lock()
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defer { lock.unlock() }
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storage.removeAll()
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}
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} |