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51 lines
1.3 KiB
Swift
51 lines
1.3 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Swift Atomics open source project
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//
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// Copyright (c) 2024 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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import WinSDK.core.synch
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@available(SwiftStdlib 6.0, *)
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@frozen
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@_staticExclusiveOnly
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public struct _MutexHandle: ~Copyable {
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@usableFromInline
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let value: _Cell<SRWLOCK>
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@available(SwiftStdlib 6.0, *)
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@_alwaysEmitIntoClient
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@_transparent
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public init() {
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value = _Cell(SRWLOCK())
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}
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@available(SwiftStdlib 6.0, *)
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@_alwaysEmitIntoClient
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@_transparent
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internal borrowing func _lock() {
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AcquireSRWLockExclusive(value._address)
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}
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@available(SwiftStdlib 6.0, *)
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@_alwaysEmitIntoClient
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@_transparent
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internal borrowing func _tryLock() -> Bool {
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// Windows BOOLEAN gets imported as 'UInt8'...
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TryAcquireSRWLockExclusive(value._address) != 0
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}
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@available(SwiftStdlib 6.0, *)
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@_alwaysEmitIntoClient
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@_transparent
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internal borrowing func _unlock() {
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ReleaseSRWLockExclusive(value._address)
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}
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}
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