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When targeting a platform that predates the introduction of isolated deinit, make a narrow exception that allows main-actor-isolated deinit to work through a special, inlineable entrypoint that is back-deployed. This implementation 1. Calls into the real implementation when available, otherwise 2. Checks if we're on the main thread, destroying immediately when we are, otherwise 3. Creates a new task on the main actor to handle destruction. This implementation is less efficient than the implementation in the runtime, but allows us to back-deploy this functionality as far back as concurrency goes. Fixes rdar://151029118.
16 lines
683 B
Swift
16 lines
683 B
Swift
// RUN: %target-swift-frontend -target %target-swift-5.1-abi-triple -parse-as-library -emit-silgen -DSILGEN %s | %FileCheck %s
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// REQUIRES: concurrency
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// REQUIRES: OS=macosx
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@MainActor
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class C {
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// CHECK-LABEL: sil hidden [ossa] @$s27deinit_isolation_backdeploy1CCfD : $@convention(method) (@owned C) -> ()
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// CHECK: function_ref @swift_task_deinitOnExecutorMainActorBackDeploy
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isolated deinit { }
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}
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// Make sure this function is available
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// CHECK: sil hidden_external [serialized] [available 12.0.0] @swift_task_deinitOnExecutorMainActorBackDeploy : $@convention(thin) (@owned AnyObject, @convention(thin) (@owned AnyObject) -> (), Builtin.Executor, Builtin.Word) -> ()
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