37 lines
946 B
Swift
37 lines
946 B
Swift
//
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// PointerExtras.swift
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// SwresTools
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//
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import Darwin
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// For performance, there are a few places strings are passed around as a base pointer
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// and a count of bytes. The Swift standard library includes `UnsafeBufferPointer` and
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// `UnsafeMutableBufferPointer` which could wrap that pointer and length, but it's
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// surprisingly slow. Replacing that with this tiny `Buffer` struct sped up string
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// formatting hotpaths considerably.
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struct Buffer<T> {
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let pointer: UnsafePointer<T>
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let count: Int
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}
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class ManagedUnsafeMutablePointer<T>: Hashable {
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let pointer: UnsafeMutablePointer<T>
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init(adoptPointer: UnsafeMutablePointer<T>) {
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pointer = adoptPointer
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}
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deinit {
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free(pointer)
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}
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var hashValue: Int {
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return pointer.hashValue
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}
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static func ==(lhs: ManagedUnsafeMutablePointer, rhs: ManagedUnsafeMutablePointer) -> Bool {
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return lhs.pointer == rhs.pointer
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}
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}
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