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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
internal struct _BridgingBufferHeader {
internal var count: Int
internal init(_ count: Int) { self.count = count }
}
// NOTE: older runtimes called this class _BridgingBufferStorage.
// The two must coexist without a conflicting ObjC class name, so it
// was renamed. The old name must not be used in the new runtime.
internal final class __BridgingBufferStorage
: ManagedBuffer<_BridgingBufferHeader, AnyObject> {
}
internal typealias _BridgingBuffer
= ManagedBufferPointer<_BridgingBufferHeader, AnyObject>
@available(OpenBSD, unavailable, message: "malloc_size is unavailable.")
extension ManagedBufferPointer
where Header == _BridgingBufferHeader, Element == AnyObject {
internal init(_ count: Int) {
self.init(
_uncheckedBufferClass: __BridgingBufferStorage.self,
minimumCapacity: count)
self.withUnsafeMutablePointerToHeader {
$0.initialize(to: Header(count))
}
}
internal var count: Int {
@inline(__always)
get {
return header.count
}
@inline(__always)
set {
return header.count = newValue
}
}
internal subscript(i: Int) -> Element {
@inline(__always)
get {
return withUnsafeMutablePointerToElements { $0[i] }
}
}
internal var baseAddress: UnsafeMutablePointer<Element> {
@inline(__always)
get {
return withUnsafeMutablePointerToElements { $0 }
}
}
internal var storage: AnyObject? {
@inline(__always)
get {
return buffer
}
}
}
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