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4495d63c12
Swift Concurrency would like to be able to use condition variables. Add support to the threading packages. rdar://100236038
59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
//===--- ScopedLock.h - ScopedLock ---------------------------- -*- 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) 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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//
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// Provides a ScopedLockT utility template that is used by Mutex and
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// ConditionVariable.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_THREADING_SCOPEDLOCK_H
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#define SWIFT_THREADING_SCOPEDLOCK_H
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namespace swift {
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// -- ScopedLock ---------------------------------------------------------------
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/// Compile time adjusted stack based object that locks/unlocks the supplied
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/// Mutex type. Use the provided typedefs instead of this directly.
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template <typename T, bool Inverted>
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class ScopedLockT {
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ScopedLockT() = delete;
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ScopedLockT(const ScopedLockT &) = delete;
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ScopedLockT &operator=(const ScopedLockT &) = delete;
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ScopedLockT(ScopedLockT &&) = delete;
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ScopedLockT &operator=(ScopedLockT &&) = delete;
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public:
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explicit ScopedLockT(T &l) : Lock(l) {
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if (Inverted) {
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Lock.unlock();
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} else {
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Lock.lock();
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}
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}
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~ScopedLockT() {
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if (Inverted) {
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Lock.lock();
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} else {
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Lock.unlock();
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}
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}
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private:
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T &Lock;
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};
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} // namespace swift
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#endif // SWIFT_THREADING_SCOPEDLOCK_H
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