Contents

ManagedBufferPointer

Contains a buffer object, and provides access to an instance of Header and contiguous storage for an arbitrary number of Element instances stored in that buffer.

Declaration

@frozen struct ManagedBufferPointer<Header, Element> where Element : ~Copyable

Overview

For most purposes, the ManagedBuffer class can be used on its own. However, in cases where objects of various different classes must serve as storage, you need to also use ManagedBufferPointer.

A valid buffer class is non-@objc, with no declared stored properties. Its deinit must destroy its stored Header and any constructed Elements.

Example Buffer Class

 class MyBuffer<Element> { // non-@objc
   typealias Manager = ManagedBufferPointer<(Int, String), Element>
   deinit {
     Manager(unsafeBufferObject: self).withUnsafeMutablePointers {
       (pointerToHeader, pointerToElements) -> Void in
       pointerToElements.deinitialize(count: self.count)
       pointerToHeader.deinitialize(count: 1)
     }
   }

   // All properties are *computed* based on members of the Header
   var count: Int {
     return Manager(unsafeBufferObject: self).header.0
   }
   var name: String {
     return Manager(unsafeBufferObject: self).header.1
   }
 }

Topics

Creating a Buffer

Inspecting a Buffer

Accessing Buffer Contents

Comparing Buffers

Default Implementations

See Also

Buffer Implementation