Package kotlin.native.concurrent
Types
Platform and version requirements: Native (1.3)
Atomic values and freezing: atomics AtomicInt, AtomicLong, AtomicNativePtr and AtomicReference are unique types with regard to freezing. Namely, they provide mutating operations, while can participate in frozen subgraphs. So shared frozen objects can have fields of atomic types.
Platform and version requirements: Native (1.3)
Platform and version requirements: Native (1.3)
Platform and version requirements: Native (1.3)
An atomic reference to a frozen Kotlin object. Can be used in concurrent scenarious but frequently shall be of nullable type and be zeroed out once no longer needed. Otherwise memory leak could happen if the atomic reference is a part of a reference cycle.
Platform and version requirements: Native (1.3)
class Continuation0 : () -> Unit
Platform and version requirements: Native (1.3)
class Continuation1<T1> : (T1) -> Unit
Platform and version requirements: Native (1.3)
class Continuation2<T1, T2> : (T1, T2) -> Unit
Platform and version requirements: Native (1.3)
Detached object graph encapsulates transferrable detached subgraph which cannot be accessed externally, until it is attached with the attach extension function.
class DetachedObjectGraph<T>
Platform and version requirements: Native (1.3)
An atomic reference to a Kotlin object. Can be used in concurrent scenarious, but must be frozen first, otherwise behaves as regular box for the value. If frozen, shall be zeroed out once no longer needed. Otherwise memory leak could happen if atomic reference is a part of a reference cycle.
class FreezableAtomicReference<T>
Platform and version requirements: Native (1.3)
Exception thrown whenever freezing is not possible.
class FreezingException : RuntimeException
Platform and version requirements: Native (1.3)
Class representing abstract computation, whose result may become available in the future.
Platform and version requirements: Native (1.3)
State of the future object.
Platform and version requirements: Native (1.3)
Exception thrown whenever we attempt to mutate frozen objects.
class InvalidMutabilityException : RuntimeException
Platform and version requirements: Native (1.3)
Mutable concurrently accessible data buffer. Could be accessed from several workers simulteniously.
Platform and version requirements: Native (1.3)
Platform and version requirements: Native (1.3)
Class representing worker.
Platform and version requirements: Native (1.3)
A frozen shared reference to a Kotlin object.
class WorkerBoundReference<out T : Any>
Annotations
Platform and version requirements: Native (1.0)
Marks a top level property with a backing field as immutable. It is possible to share the value of such property between multiple threads, but it becomes deeply frozen, so no changes can be made to its state or the state of objects it refers to.
annotation class SharedImmutable
Platform and version requirements: Native (1.0)
Marks a top level property with a backing field or an object as thread local. The object remains mutable and it is possible to change its state, but every thread will have a distinct copy of this object, so changes in one thread are not reflected in another.
annotation class ThreadLocal
Properties
Platform and version requirements: Native (1.3)
Checks if given object is null or frozen or permanent (i.e. instantiated at compile-time).
val Any?.isFrozen: Boolean
Functions
Platform and version requirements: Native (1.3)
Atomic lazy initializer, could be used in frozen objects, freezes initializing lambda, so use very carefully. Also, as with other uses of an AtomicReference may potentially leak memory, so it is recommended to use atomicLazy
in cases of objects living forever, such as object signletons, or in cases where it's guaranteed not to have cyclical garbage.
fun <T> atomicLazy(initializer: () -> T): Lazy<T>
Platform and version requirements: Native (1.3)
Attaches previously detached object subgraph created by DetachedObjectGraph. Please note, that once object graph is attached, the DetachedObjectGraph.stable pointer does not make sense anymore, and shall be discarded, so attach of one DetachedObjectGraph object can only happen once.
fun <T> DetachedObjectGraph<T>.attach(): T
Platform and version requirements: Native (1.3)
fun COpaquePointer.callContinuation0()
Platform and version requirements: Native (1.3)
fun <T1> COpaquePointer.callContinuation1()
Platform and version requirements: Native (1.3)
fun <T1, T2> COpaquePointer.callContinuation2()
Platform and version requirements: Native (1.3)
This function ensures that if we see such an object during freezing attempt - freeze fails and FreezingException is thrown.
fun Any.ensureNeverFrozen()
Platform and version requirements: Native (1.3)
Freezes object subgraph reachable from this object. Frozen objects can be freely shared between threads/workers.
Platform and version requirements: Native (1.3)
fun <T> Collection<Future<T>>.waitForMultipleFutures(
millis: Int
): Set<Future<T>>
Platform and version requirements: Native (1.3)
Executes block with new Worker as resource, by starting the new worker, calling provided block (in current context) with newly started worker as this and terminating worker after the block completes. Note that this operation is pretty heavyweight, use preconfigured worker or worker pool if need to execute it frequently.
fun <R> withWorker(
name: String? = null,
errorReporting: Boolean = true,
block: Worker.() -> R
): R