java - 为什么我的 PipedOutputStream 死锁了？

Question

我正在尝试使用 PipedInputStream 和 PipedOutputStream 实现一个线程循环缓冲区，但每次当我进入 Decoder runnable 中的 mHead.write 时它都会锁定。我认为使用单独的线程时不会出现死锁。

    private class DecoderTask implements Runnable{

    @Override
    public void run() {
        while(!mStop){
            try {
                    Log.d(TAG,"trying to write");
        mHead.write(decode( 0, 1000));
            mHead.flush();
            Log.d(TAG,"Decoded");
            } catch (DecoderException e) {
                Log.e(TAG,e.toString());
            } catch (IOException e) {
                Log.e(TAG,e.toString());
            }
        }
    }

}
private class WriteTask implements Runnable{

    @Override
    public void run() {
        while(!mStop){
            try {
                                 Log.d(TAG,"trying to read");
                 int read = mTail.read(mByteSlave, 0, mByteSlave.length);
                 mAudioTrack.flush();
                                 mAudioTrack.write(mByteSlave,0,read);
                                 Log.d(TAG,"read");                 
            } catch (IOException e) {
                Log.e(TAG,e.toString());
            }
        }
    }

}


//in some function
mTail = new PipedInputStream();
mHead = new PipedOutputStream(mTail);
mByteSlave = new byte[BUF];
mT1 = new Thread(new DecoderTask(), "Reader");
mT2 = new Thread(new WriteTask(), "Writer");
mT1.start();
mT2.start();
return;

编辑:这是我的服务的完整来源 http://pastie.org/1179792

logcat 打印出来:

尝试阅读
努力写

Answer 1

我遇到过同样的问题并通过覆盖默认值解决了 PIPE_SIZE在PipedInputStream(int)构造函数。方法PipedOutputStream.write(byte[], int, int)阻塞，直到所有字节都写入输出流。这可能是默认 PIPE_SIZE 的问题。

毕竟，大小很重要 ;-)