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cd7570fdee
On OpenBSD, malloc introspection (e.g., malloc_usable_size or malloc_size) is not provided by the platform allocator. Since allocator introspection is currently a load-bearing piece of functionality for ManagedBuffer and ManagedBufferPointer, pending any API changes, as a stopgap measure, this commit marks methods in ManagedBuffer and ManagedBufferPointer calling _swift_stdlib_malloc_size and methods dependent thereon unavailable on OpenBSD. This may induce some compatibility issues for some files, but at least this change ensures that we can get stdlib to build on this platform until the evolution process addresses this problem more thoroughly.
72 lines
2.0 KiB
Swift
72 lines
2.0 KiB
Swift
//===----------------------------------------------------------------------===//
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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 - 2017 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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internal struct _BridgingBufferHeader {
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internal init(_ count: Int) { self.count = count }
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internal var count: Int
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}
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// NOTE: older runtimes called this class _BridgingBufferStorage.
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// The two must coexist without a conflicting ObjC class name, so it
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// was renamed. The old name must not be used in the new runtime.
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internal final class __BridgingBufferStorage
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: ManagedBuffer<_BridgingBufferHeader, AnyObject> {
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}
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internal typealias _BridgingBuffer
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= ManagedBufferPointer<_BridgingBufferHeader, AnyObject>
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@available(OpenBSD, unavailable, message: "malloc_size is unavailable.")
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extension ManagedBufferPointer
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where Header == _BridgingBufferHeader, Element == AnyObject {
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internal init(_ count: Int) {
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self.init(
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_uncheckedBufferClass: __BridgingBufferStorage.self,
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minimumCapacity: count)
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self.withUnsafeMutablePointerToHeader {
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$0.initialize(to: Header(count))
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}
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}
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internal var count: Int {
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@inline(__always)
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get {
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return header.count
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}
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@inline(__always)
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set {
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return header.count = newValue
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}
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}
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internal subscript(i: Int) -> Element {
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@inline(__always)
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get {
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return withUnsafeMutablePointerToElements { $0[i] }
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}
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}
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internal var baseAddress: UnsafeMutablePointer<Element> {
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@inline(__always)
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get {
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return withUnsafeMutablePointerToElements { $0 }
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}
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}
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internal var storage: AnyObject? {
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@inline(__always)
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get {
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return buffer
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}
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}
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}
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