CFStreamCreateBoundPair不能释放

Question

我用CFStreamCreateBoundPair来创建一对流，以便上传一个很大的file.The代码，如下所示。

let readStreamPointer = UnsafeMutablePointer<Unmanaged<CFReadStream>?>.alloc(1)
let writeStreamPointer = UnsafeMutablePointer<Unmanaged<CFWriteStream>?>.alloc(1)
let bufferSize = 1024*1024 //1M buffer size
CFStreamCreateBoundPair(kCFAllocatorDefault, readStreamPointer,writeStreamPointer, Int(bufferSize) as CFIndex)
if let rStream = readStreamPointer.memory?.takeRetainedValue(),writeStream = writeStreamPointer.memory?.takeRetainedValue() {

}

除了内存问题，一切都很顺利。我检查了仪器，发现CFStreamCreateBoundPair无法释放缓冲区大小的内存，在本例中，缓冲区大小是CFReadStream和CFWriteStream关闭后的1M。我还有一个屏幕截图。

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我不太熟悉swift中的核心基础框架，也不知道为什么它不能自动发布。

Answer 1

下面是我这样做的方法：

class func createBound(inputStream: inout InputStream?, outputStream: inout OutputStream?, bufferSize: UInt) {
    var readStream: Unmanaged<CFReadStream>?
    var writeStream: Unmanaged<CFWriteStream>?
    CFStreamCreateBoundPair(nil, &readStream, &writeStream, CFIndex(bufferSize))
    if inputStream != nil {
        inputStream = readStream!.takeUnretainedValue()
    }
    if outputStream != nil {
        outputStream = writeStream!.takeUnretainedValue()
    }
}