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88 lines
2.3 KiB
Swift
88 lines
2.3 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) 2026 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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// Private inline storage for EmbeddedPlatform's opaque mutex hooks.
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@usableFromInline
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internal typealias _SwiftEmbeddedMutex = [(EMBEDDED_SWIFT_MUTEX_NUM_WORDS) of UInt]
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@_extern(c, "_swift_mutex_init")
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@usableFromInline
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internal func _swift_mutex_init(
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_ mutex: UnsafeMutableRawPointer,
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_ flags: CUnsignedLongLong
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)
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@_extern(c, "_swift_mutex_destroy")
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@usableFromInline
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internal func _swift_mutex_destroy(
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_ mutex: UnsafeMutableRawPointer
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)
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@_extern(c, "_swift_mutex_lock")
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@usableFromInline
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internal func _swift_mutex_lock(
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_ mutex: UnsafeMutableRawPointer
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)
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@_extern(c, "_swift_mutex_unlock")
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@usableFromInline
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internal func _swift_mutex_unlock(
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_ mutex: UnsafeMutableRawPointer
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)
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@_extern(c, "_swift_mutex_tryLock")
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@usableFromInline
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internal func _swift_mutex_tryLock(
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_ mutex: UnsafeMutableRawPointer
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) -> Int
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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 storage: _Cell<_SwiftEmbeddedMutex>
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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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storage = _Cell(.init(repeating: 0))
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unsafe _swift_mutex_init(UnsafeMutableRawPointer(storage._address), 0)
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}
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deinit {
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unsafe _swift_mutex_destroy(UnsafeMutableRawPointer(storage._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 _lock() {
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unsafe _swift_mutex_lock(UnsafeMutableRawPointer(storage._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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unsafe _swift_mutex_tryLock(UnsafeMutableRawPointer(storage._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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unsafe _swift_mutex_unlock(UnsafeMutableRawPointer(storage._address))
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}
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}
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