Alexander Udalov
25 lines
487 B
Kotlin
Vendored
25 lines
487 B
Kotlin
Vendored
// WITH_RUNTIME
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import java.util.concurrent.locks.ReentrantReadWriteLock
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import kotlin.concurrent.write
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class UpdateableThing {
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private val lock = ReentrantReadWriteLock()
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private var updateCount = 0
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fun <T> performUpdates(block: () -> T): T {
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lock.write {
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++updateCount
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val result = block()
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--updateCount
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return result
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}
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}
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}
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fun box(): String {
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return UpdateableThing().performUpdates { "OK" }
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}
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