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87 lines
3.3 KiB
Swift
87 lines
3.3 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) 2019 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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/// An object composed of count elements that are stored contiguously in memory.
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///
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/// In practice, most types conforming to this protocol will be Collections,
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/// but they need not be--they need only have an Element type and count, and
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/// provide the withUnsafeBufferPointer function.
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@available(iOS 9999, macOS 9999, tvOS 9999, watchOS 9999, *)
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public protocol AccelerateBuffer {
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/// The buffer's element type.
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associatedtype Element
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/// The number of elements in the buffer.
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var count: Int { get }
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/// Calls a closure with a pointer to the object's contiguous storage.
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func withUnsafeBufferPointer<R>(
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_ body: (UnsafeBufferPointer<Element>) throws -> R
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) rethrows -> R
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}
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/// A mutable object composed of count elements that are stored contiguously
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/// in memory.
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///
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/// In practice, most types conforming to this protocol will be
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/// MutableCollections, but they need not be.
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@available(iOS 9999, macOS 9999, tvOS 9999, watchOS 9999, *)
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public protocol AccelerateMutableBuffer: AccelerateBuffer {
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/// Calls the given closure with a pointer to the object's mutable
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/// contiguous storage.
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mutating func withUnsafeMutableBufferPointer<R>(
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_ body: (inout UnsafeMutableBufferPointer<Element>) throws -> R
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) rethrows -> R
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}
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@available(iOS 9999, macOS 9999, tvOS 9999, watchOS 9999, *)
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public extension AccelerateBuffer where Self: Collection {
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@inlinable
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func withUnsafeBufferPointer<R>(
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_ body: (UnsafeBufferPointer<Element>) throws -> R
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) rethrows -> R {
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return try withContiguousStorageIfAvailable(body)!
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}
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}
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@available(iOS 9999, macOS 9999, tvOS 9999, watchOS 9999, *)
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extension AccelerateMutableBuffer where Self: MutableCollection {
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@inlinable
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public mutating func withUnsafeMutableBufferPointer<R>(
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_ body: (inout UnsafeMutableBufferPointer<Element>) throws -> R
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) rethrows -> R {
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return try withContiguousMutableStorageIfAvailable(body)!
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}
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}
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@available(iOS 9999, macOS 9999, tvOS 9999, watchOS 9999, *)
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extension Array: AccelerateMutableBuffer { }
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@available(iOS 9999, macOS 9999, tvOS 9999, watchOS 9999, *)
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extension ContiguousArray: AccelerateMutableBuffer { }
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@available(iOS 9999, macOS 9999, tvOS 9999, watchOS 9999, *)
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extension ArraySlice: AccelerateMutableBuffer { }
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@available(iOS 9999, macOS 9999, tvOS 9999, watchOS 9999, *)
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extension UnsafeBufferPointer: AccelerateBuffer { }
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@available(iOS 9999, macOS 9999, tvOS 9999, watchOS 9999, *)
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extension UnsafeMutableBufferPointer: AccelerateMutableBuffer { }
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@available(iOS 9999, macOS 9999, tvOS 9999, watchOS 9999, *)
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extension Slice: AccelerateBuffer where Base: AccelerateBuffer { }
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@available(iOS 9999, macOS 9999, tvOS 9999, watchOS 9999, *)
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extension Slice: AccelerateMutableBuffer
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where Base: AccelerateMutableBuffer & MutableCollection { }
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