}
	// Clear tinyalloc pool.
	c.tiny = 0
	c.tinyoffset = 0

	// Flush tinyAllocs.
	stats := memstats.heapStats.acquire()
	atomic.Xadd64(&stats.tinyAllocCount, int64(c.tinyAllocs))
	c.tinyAllocs = 0
	memstats.heapStats.release()

	// Update heapLive and heapScan.
	gcController.update(dHeapLive, scanAlloc)
}

// prepareForSweep flushes c if the system has entered a new sweep phase

		_, err := f.Write([]byte{text[i]})
		if err != nil {
			t.Fatal(err)
		}
	}

	// The "pre" output should all have been flushed already.
	if want, got := pre, out.String(); want != got {
		t.Errorf("filter should have already flushed %q, but flushed %q", want, got)
	}

	code, err := f.Finish()
	if err != nil {
		t.Fatal(err)
	}

	// Nothing more should have been written to out.

//
// 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)

import org.gradle.internal.logging.events.OutputEvent;
import org.gradle.internal.logging.events.OutputEventListener;
import org.gradle.internal.logging.events.UpdateNowEvent;

/**
 * Flushes the console output. Used when no other listener in the chain flushes the console.
 */
public class FlushConsoleListener implements OutputEventListener {
    private final OutputEventListener delegate;
    private final Console console;

// For HTTP2 an http.ResponseWriter object implements
// http.Flusher and http.CloseNotifier.
// It is used for testing purpose only
type FakeResponseWriterFlusherCloseNotifier struct {
	*FakeResponseWriter
}

func (fw *FakeResponseWriterFlusherCloseNotifier) Flush()                   {}
func (fw *FakeResponseWriterFlusherCloseNotifier) CloseNotify() <-chan bool { return nil }

	// bound is pretty loose, but avoids counting
	// lots of varint sizes.
	//
	// Add 1 because we might also write a traceAllocFreeTypesBatch byte.
	var flushed bool
	w, flushed = w.ensure(1 + maxBytes)
	if flushed {
		// Annotate the batch as containing types.
		w.byte(byte(traceAllocFreeTypesBatch))
	}

	// Emit type.
	w.varint(uint64(node.id))
	w.varint(uint64(uintptr(unsafe.Pointer(typ))))

// complete for formatting purposes.
func (b *Writer) Flush() error {
	return b.flush()
}

// flush is the internal version of Flush, with a named return value which we
// don't want to expose.
func (b *Writer) flush() (err error) {
	defer b.handlePanic(&err, "Flush")
	b.flushNoDefers()
	return nil
}

// flushNoDefers is like flush, but without a deferred handlePanic call. This

// If the underlying writer returns an error, Flush returns that error.
//
// In the terminology of the zlib library, Flush is equivalent to Z_SYNC_FLUSH.
func (w *Writer) Flush() error {
	// For more about flushing:
	// https://www.bolet.org/~pornin/deflate-flush.html
	return w.d.syncFlush()
}

// Close flushes and closes the writer.
func (w *Writer) Close() error {
	return w.d.close()
}

	if len(contentType) == 0 {
		contentType = "application/octet-stream"
	}
	w.Header().Set("Content-Type", contentType)
	w.WriteHeader(statusCode)
	// Flush headers, if possible
	if flusher, ok := w.(http.Flusher); ok {
		flusher.Flush()
	}
	writer := w.(io.Writer)
	if flush {
		writer = flushwriter.Wrap(w)
	}
	io.Copy(writer, out)
}

		nr, err := src.Read(buf)
		log.Debugf("read %v/%v", nr, err)
		if nr > 0 { // before dealing with the read error
			nw, ew := dst.Write(buf[0:nr])
			log.Debugf("write %v/%v", nw, ew)
			if f, ok := dst.(http.Flusher); ok {
				f.Flush()
			}
			if nr != nw { // Should not happen
				ew = io.ErrShortWrite
			}
			if ew != nil {
				return
			}
		}
		if err != nil {
			// read is already closed - we need to close out