// Write is blocking otherwise.
func (w *Writer) Write(p []byte) (n int, err error) {
	return w.pw.Write(p)
}

// Close closes the writer.
// Any accepted writes will be flushed. Any new writes will be rejected.
// Once Close() exits, files are synchronized to disk.
func (w *Writer) Close() error {
	w.pw.CloseWithError(nil)

	if w.f != nil {
		if err := w.closeCurrentFile(); err != nil {

        result.groupedOutput.task(':b:log').output == 'Interrupting output'
        result.groupedOutput.task(':b:log').outcome == null
    }

    def "long running task output are flushed after delay"() {
        server.start()

        given:
        buildFile << """
            task log {
                doLast {
                    logger.quiet 'Before'

//
// Returns whether the buffer was flushed.
func (w traceWriter) ensure(maxSize int) (traceWriter, bool) {
	refill := w.traceBuf == nil || !w.available(maxSize)
	if refill {
		w = w.refill(traceNoExperiment)
	}
	return w, refill
}

// flush puts w.traceBuf on the queue of full buffers.
func (w traceWriter) flush() traceWriter {
	systemstack(func() {
		lock(&trace.lock)

	// un-shaded stacks and flush after each stack scan.
	gcw := &pp.gcw
	pos := 0
	for _, ptr := range ptrs {
		if ptr < minLegalPointer {
			// nil pointers are very common, especially
			// for the "old" values. Filter out these and
			// other "obvious" non-heap pointers ASAP.
			//
			// TODO: Should we filter out nils in the fast
			// path to reduce the rate of flushes?
			continue
		}

func (dd *dictDecoder) histSize() int {
	if dd.full {
		return len(dd.hist)
	}
	return dd.wrPos
}

// availRead reports the number of bytes that can be flushed by readFlush.
func (dd *dictDecoder) availRead() int {
	return dd.wrPos - dd.rdPos
}

// availWrite reports the available amount of output buffer space.
func (dd *dictDecoder) availWrite() int {

		trace.GCStart()
		traceRelease(trace)
	}

	// Check that all Ps have finished deferred mcache flushes.
	for _, p := range allp {
		if fg := p.mcache.flushGen.Load(); fg != mheap_.sweepgen {
			println("runtime: p", p.id, "flushGen", fg, "!= sweepgen", mheap_.sweepgen)
			throw("p mcache not flushed")
		}
	}

	gcBgMarkStartWorkers()

	systemstack(gcResetMarkState)

type Hash struct {
	_     [0]func()     // not comparable
	seed  Seed          // initial seed used for this hash
	state Seed          // current hash of all flushed bytes
	buf   [bufSize]byte // unflushed byte buffer
	n     int           // number of unflushed bytes
}

// bufSize is the size of the Hash write buffer.
// The buffer ensures that writes depend only on the sequence of bytes,

        // == true. Then there is a final call to flush.
        CoderResult result;
        if (doneFlushing) {
          result = CoderResult.UNDERFLOW;
        } else if (doneEncoding) {
          result = encoder.flush(byteBuffer);
        } else {
          result = encoder.encode(charBuffer, byteBuffer, endOfInput);
        }

        // == true. Then there is a final call to flush.
        CoderResult result;
        if (doneFlushing) {
          result = CoderResult.UNDERFLOW;
        } else if (doneEncoding) {
          result = encoder.flush(byteBuffer);
        } else {
          result = encoder.encode(charBuffer, byteBuffer, endOfInput);
        }

	// Non-literal codes decode to a sequence of suffixes that are first
	// written right-to-left from the end of the buffer before being copied
	// to the start of the buffer.
	// It is flushed when it contains >= 1<<maxWidth bytes,
	// so that there is always room to decode an entire code.
	output [2 * 1 << maxWidth]byte
	o      int    // write index into output
	toRead []byte // bytes to return from Read
}