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2b4082e4f9
When using the new custom default executors, sometimes we end up taking a long time to do a task switch. This is happening because the path the new code takes sometimes results in a concrete pointer to the default global executor being in the executor tracking information in `swift_task_switch()`, and if we try to switch to a `nil` task executor (which _also_ means the default global executor), we aren’t spotting that and we’re taking the slow path. Essentially, we want to take the fast path in cases where we switch from `nil` to the concrete default global executor and vice-versa. rdar://156701386
54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
//===--- ExecutorBridge.h - C++ side of executor bridge -------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2025 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_EXECUTOR_BRIDGE_H_
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#define SWIFT_EXECUTOR_BRIDGE_H_
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#include "swift/Runtime/Concurrency.h"
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namespace swift {
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wreturn-type-c-linkage"
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extern "C" SWIFT_CC(swift)
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SerialExecutorRef swift_getMainExecutor();
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extern "C" SWIFT_CC(swift)
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TaskExecutorRef swift_getDefaultExecutor();
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#if !SWIFT_CONCURRENCY_EMBEDDED
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extern "C" SWIFT_CC(swift)
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void *swift_createDispatchEventC(void (*handler)(void *), void *context);
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extern "C" SWIFT_CC(swift)
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void swift_destroyDispatchEventC(void *event);
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extern "C" SWIFT_CC(swift)
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void swift_signalDispatchEvent(void *event);
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#endif // !SWIFT_CONCURRENCY_EMBEDDED
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extern "C" SWIFT_CC(swift) __attribute__((noreturn))
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void swift_dispatchMain();
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extern "C" SWIFT_CC(swift)
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void swift_createDefaultExecutors();
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extern "C" SWIFT_CC(swift)
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void swift_createDefaultExecutorsOnce();
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#pragma clang diagnostic pop
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} // namespace swift
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#endif /* SWIFT_EXECUTOR_BRIDGE_H_ */
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