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d0017555c7
Replace C++ implementation of swift_beginAccess and swift_endAccess with (almost) pure Swift implementation. Helpers remain in C++ for TLS, getting return addresses, and raising a fatal error on violations. This change also moves the exclusivity access set head from the shared SwiftTLSContext structure to a dedicated TLS key. This improves performance, which is important for exclusivity checking. This is particularly the case where we can inline TLS access with a constant key, as on Darwin ARM64. The code that bridges exclusivity tracking into Concurrency remains in C++. The new Swift implementation exposes a few helpers for it to use as a replacement for directly manipulating the C++ implementation. rdar://161122309
32 lines
855 B
C++
32 lines
855 B
C++
//===--- TLSKeys.h - Reserved TLS keys ------------------------ -*- C++ -*-===//
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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 - 2022 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_THREADING_TLSKEYS_H
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#define SWIFT_THREADING_TLSKEYS_H
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namespace swift {
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enum class tls_key {
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runtime,
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stdlib,
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compatibility50,
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concurrency_task,
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concurrency_executor_tracking_info,
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concurrency_fallback,
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observation_transaction,
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exclusivity,
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};
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} // namespace swift
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#endif // SWIFT_THREADING_TLSKEYS_H
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