gbufferedoutputstream.c revision a4427bfff5d31499dc0b46fa3f734bc92f7d0dd5 
1/* GIO - GLib Input, Output and Streaming Library
2 *
3 * Copyright (C) 2006-2007 Red Hat, Inc.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General
16 * Public License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
18 * Boston, MA 02111-1307, USA.
19 *
20 * Author: Christian Kellner <gicmo@gnome.org>
21 */
22
23#include <config.h>
24#include "gbufferedoutputstream.h"
25#include "goutputstream.h"
26#include "gsimpleasyncresult.h"
27#include "string.h"
28#include "glibintl.h"
29
30#include <gioalias.h>
31
32/**
33 * SECTION:gbufferedoutputstream
34 * @short_description: Buffered Output Stream
35 * @include: gio/gio.h
36 * @see_also: #GFilterOutputStream, #GOutputStream
37 *
38 * Buffered output stream implements #GFilterOutputStream and provides
39 * for buffered writes.
40 *
41 * By default, #GBufferedOutputStream's buffer size is set at 4 kilobytes.
42 *
43 * To create a buffered output stream, use g_buffered_output_stream_new(),
44 * or g_buffered_output_stream_new_sized() to specify the buffer's size
45 * at construction.
46 *
47 * To get the size of a buffer within a buffered input stream, use
48 * g_buffered_output_stream_get_buffer_size(). To change the size of a
49 * buffered output stream's buffer, use
50 * g_buffered_output_stream_set_buffer_size(). Note that the buffer's
51 * size cannot be reduced below the size of the data within the buffer.
52 **/
53
54#define DEFAULT_BUFFER_SIZE 4096
55
56struct _GBufferedOutputStreamPrivate {
57  guint8 *buffer;
58  gsize   len;
59  goffset pos;
60  gboolean auto_grow;
61};
62
63enum {
64  PROP_0,
65  PROP_BUFSIZE,
66  PROP_AUTO_GROW
67};
68
69static void     g_buffered_output_stream_set_property (GObject      *object,
70                                                       guint         prop_id,
71                                                       const GValue *value,
72                                                       GParamSpec   *pspec);
73
74static void     g_buffered_output_stream_get_property (GObject    *object,
75                                                       guint       prop_id,
76                                                       GValue     *value,
77                                                       GParamSpec *pspec);
78static void     g_buffered_output_stream_finalize     (GObject *object);
79
80
81static gssize   g_buffered_output_stream_write        (GOutputStream *stream,
82                                                       const void    *buffer,
83                                                       gsize          count,
84                                                       GCancellable  *cancellable,
85                                                       GError       **error);
86static gboolean g_buffered_output_stream_flush        (GOutputStream    *stream,
87                                                       GCancellable  *cancellable,
88                                                       GError          **error);
89static gboolean g_buffered_output_stream_close        (GOutputStream  *stream,
90                                                       GCancellable   *cancellable,
91                                                       GError        **error);
92
93static void     g_buffered_output_stream_write_async  (GOutputStream        *stream,
94                                                       const void           *buffer,
95                                                       gsize                 count,
96                                                       int                   io_priority,
97                                                       GCancellable         *cancellable,
98                                                       GAsyncReadyCallback   callback,
99                                                       gpointer              data);
100static gssize   g_buffered_output_stream_write_finish (GOutputStream        *stream,
101                                                       GAsyncResult         *result,
102                                                       GError              **error);
103static void     g_buffered_output_stream_flush_async  (GOutputStream        *stream,
104                                                       int                   io_priority,
105                                                       GCancellable         *cancellable,
106                                                       GAsyncReadyCallback   callback,
107                                                       gpointer              data);
108static gboolean g_buffered_output_stream_flush_finish (GOutputStream        *stream,
109                                                       GAsyncResult         *result,
110                                                       GError              **error);
111static void     g_buffered_output_stream_close_async  (GOutputStream        *stream,
112                                                       int                   io_priority,
113                                                       GCancellable         *cancellable,
114                                                       GAsyncReadyCallback   callback,
115                                                       gpointer              data);
116static gboolean g_buffered_output_stream_close_finish (GOutputStream        *stream,
117                                                       GAsyncResult         *result,
118                                                       GError              **error);
119
120G_DEFINE_TYPE (GBufferedOutputStream,
121               g_buffered_output_stream,
122               G_TYPE_FILTER_OUTPUT_STREAM)
123
124
125static void
126g_buffered_output_stream_class_init (GBufferedOutputStreamClass *klass)
127{
128  GObjectClass *object_class;
129  GOutputStreamClass *ostream_class;
130
131  g_type_class_add_private (klass, sizeof (GBufferedOutputStreamPrivate));
132
133  object_class = G_OBJECT_CLASS (klass);
134  object_class->get_property = g_buffered_output_stream_get_property;
135  object_class->set_property = g_buffered_output_stream_set_property;
136  object_class->finalize     = g_buffered_output_stream_finalize;
137
138  ostream_class = G_OUTPUT_STREAM_CLASS (klass);
139  ostream_class->write_fn = g_buffered_output_stream_write;
140  ostream_class->flush = g_buffered_output_stream_flush;
141  ostream_class->close_fn = g_buffered_output_stream_close;
142  ostream_class->write_async  = g_buffered_output_stream_write_async;
143  ostream_class->write_finish = g_buffered_output_stream_write_finish;
144  ostream_class->flush_async  = g_buffered_output_stream_flush_async;
145  ostream_class->flush_finish = g_buffered_output_stream_flush_finish;
146  ostream_class->close_async  = g_buffered_output_stream_close_async;
147  ostream_class->close_finish = g_buffered_output_stream_close_finish;
148
149  g_object_class_install_property (object_class,
150                                   PROP_BUFSIZE,
151                                   g_param_spec_uint ("buffer-size",
152                                                      P_("Buffer Size"),
153                                                      P_("The size of the backend buffer"),
154                                                      1,
155                                                      G_MAXUINT,
156                                                      DEFAULT_BUFFER_SIZE,
157                                                      G_PARAM_READWRITE|G_PARAM_CONSTRUCT|
158                                                      G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
159
160  g_object_class_install_property (object_class,
161                                   PROP_AUTO_GROW,
162                                   g_param_spec_boolean ("auto-grow",
163                                                         P_("Auto-grow"),
164                                                         P_("Whether the buffer should automatically grow"),
165                                                         FALSE,
166                                                         G_PARAM_READWRITE|
167                                                         G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
168
169}
170
171/**
172 * g_buffered_output_stream_get_buffer_size:
173 * @stream: a #GBufferedOutputStream.
174 *
175 * Gets the size of the buffer in the @stream.
176 *
177 * Returns: the current size of the buffer.
178 **/
179gsize
180g_buffered_output_stream_get_buffer_size (GBufferedOutputStream *stream)
181{
182  g_return_val_if_fail (G_IS_BUFFERED_OUTPUT_STREAM (stream), -1);
183
184  return stream->priv->len;
185}
186
187/**
188 * g_buffered_output_stream_set_buffer_size:
189 * @stream: a #GBufferedOutputStream.
190 * @size: a #gsize.
191 *
192 * Sets the size of the internal buffer to @size.
193 **/
194void
195g_buffered_output_stream_set_buffer_size (GBufferedOutputStream *stream,
196                                          gsize                  size)
197{
198  GBufferedOutputStreamPrivate *priv;
199  guint8 *buffer;
200
201  g_return_if_fail (G_IS_BUFFERED_OUTPUT_STREAM (stream));
202
203  priv = stream->priv;
204
205  if (size == priv->len)
206    return;
207
208  if (priv->buffer)
209    {
210      size = MAX (size, priv->pos);
211
212      buffer = g_malloc (size);
213      memcpy (buffer, priv->buffer, priv->pos);
214      g_free (priv->buffer);
215      priv->buffer = buffer;
216      priv->len = size;
217      /* Keep old pos */
218    }
219  else
220    {
221      priv->buffer = g_malloc (size);
222      priv->len = size;
223      priv->pos = 0;
224    }
225
226  g_object_notify (G_OBJECT (stream), "buffer-size");
227}
228
229/**
230 * g_buffered_output_stream_get_auto_grow:
231 * @stream: a #GBufferedOutputStream.
232 *
233 * Checks if the buffer automatically grows as data is added.
234 *
235 * Returns: %TRUE if the @stream's buffer automatically grows,
236 * %FALSE otherwise.
237 **/
238gboolean
239g_buffered_output_stream_get_auto_grow (GBufferedOutputStream *stream)
240{
241  g_return_val_if_fail (G_IS_BUFFERED_OUTPUT_STREAM (stream), FALSE);
242
243  return stream->priv->auto_grow;
244}
245
246/**
247 * g_buffered_output_stream_set_auto_grow:
248 * @stream: a #GBufferedOutputStream.
249 * @auto_grow: a #gboolean.
250 *
251 * Sets whether or not the @stream's buffer should automatically grow.
252 * If @auto_grow is true, then each write will just make the buffer
253 * larger, and you must manually flush the buffer to actually write out
254 * the data to the underlying stream.
255 **/
256void
257g_buffered_output_stream_set_auto_grow (GBufferedOutputStream *stream,
258                                        gboolean               auto_grow)
259{
260  GBufferedOutputStreamPrivate *priv;
261  g_return_if_fail (G_IS_BUFFERED_OUTPUT_STREAM (stream));
262  priv = stream->priv;
263  auto_grow = auto_grow != FALSE;
264  if (priv->auto_grow != auto_grow)
265    {
266      priv->auto_grow = auto_grow;
267      g_object_notify (G_OBJECT (stream), "auto-grow");
268    }
269}
270
271static void
272g_buffered_output_stream_set_property (GObject      *object,
273                                       guint         prop_id,
274                                       const GValue *value,
275                                       GParamSpec   *pspec)
276{
277  GBufferedOutputStream *stream;
278
279  stream = G_BUFFERED_OUTPUT_STREAM (object);
280
281  switch (prop_id)
282    {
283    case PROP_BUFSIZE:
284      g_buffered_output_stream_set_buffer_size (stream, g_value_get_uint (value));
285      break;
286
287    case PROP_AUTO_GROW:
288      g_buffered_output_stream_set_auto_grow (stream, g_value_get_boolean (value));
289      break;
290
291    default:
292      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
293      break;
294    }
295
296}
297
298static void
299g_buffered_output_stream_get_property (GObject    *object,
300                                       guint       prop_id,
301                                       GValue     *value,
302                                       GParamSpec *pspec)
303{
304  GBufferedOutputStream *buffered_stream;
305  GBufferedOutputStreamPrivate *priv;
306
307  buffered_stream = G_BUFFERED_OUTPUT_STREAM (object);
308  priv = buffered_stream->priv;
309
310  switch (prop_id)
311    {
312    case PROP_BUFSIZE:
313      g_value_set_uint (value, priv->len);
314      break;
315
316    case PROP_AUTO_GROW:
317      g_value_set_boolean (value, priv->auto_grow);
318      break;
319
320    default:
321      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
322      break;
323    }
324
325}
326
327static void
328g_buffered_output_stream_finalize (GObject *object)
329{
330  GBufferedOutputStream *stream;
331  GBufferedOutputStreamPrivate *priv;
332
333  stream = G_BUFFERED_OUTPUT_STREAM (object);
334  priv = stream->priv;
335
336  g_free (priv->buffer);
337
338  G_OBJECT_CLASS (g_buffered_output_stream_parent_class)->finalize (object);
339}
340
341static void
342g_buffered_output_stream_init (GBufferedOutputStream *stream)
343{
344  stream->priv = G_TYPE_INSTANCE_GET_PRIVATE (stream,
345                                              G_TYPE_BUFFERED_OUTPUT_STREAM,
346                                              GBufferedOutputStreamPrivate);
347
348}
349
350/**
351 * g_buffered_output_stream_new:
352 * @base_stream: a #GOutputStream.
353 *
354 * Creates a new buffered output stream for a base stream.
355 *
356 * Returns: a #GOutputStream for the given @base_stream.
357 **/
358GOutputStream *
359g_buffered_output_stream_new (GOutputStream *base_stream)
360{
361  GOutputStream *stream;
362
363  g_return_val_if_fail (G_IS_OUTPUT_STREAM (base_stream), NULL);
364
365  stream = g_object_new (G_TYPE_BUFFERED_OUTPUT_STREAM,
366                         "base-stream", base_stream,
367                         NULL);
368
369  return stream;
370}
371
372/**
373 * g_buffered_output_stream_new_sized:
374 * @base_stream: a #GOutputStream.
375 * @size: a #gsize.
376 *
377 * Creates a new buffered output stream with a given buffer size.
378 *
379 * Returns: a #GOutputStream with an internal buffer set to @size.
380 **/
381GOutputStream *
382g_buffered_output_stream_new_sized (GOutputStream *base_stream,
383                                    gsize          size)
384{
385  GOutputStream *stream;
386
387  g_return_val_if_fail (G_IS_OUTPUT_STREAM (base_stream), NULL);
388
389  stream = g_object_new (G_TYPE_BUFFERED_OUTPUT_STREAM,
390                         "base-stream", base_stream,
391                         "buffer-size", size,
392                         NULL);
393
394  return stream;
395}
396
397static gboolean
398flush_buffer (GBufferedOutputStream  *stream,
399              GCancellable           *cancellable,
400              GError                 **error)
401{
402  GBufferedOutputStreamPrivate *priv;
403  GOutputStream                *base_stream;
404  gboolean                      res;
405  gsize                         bytes_written;
406  gsize                         count;
407
408  priv = stream->priv;
409  bytes_written = 0;
410  base_stream = G_FILTER_OUTPUT_STREAM (stream)->base_stream;
411
412  g_return_val_if_fail (G_IS_OUTPUT_STREAM (base_stream), FALSE);
413
414  res = g_output_stream_write_all (base_stream,
415                                   priv->buffer,
416                                   priv->pos,
417                                   &bytes_written,
418                                   cancellable,
419                                   error);
420
421  count = priv->pos - bytes_written;
422
423  if (count > 0)
424    g_memmove (priv->buffer, priv->buffer + bytes_written, count);
425
426  priv->pos -= bytes_written;
427
428  return res;
429}
430
431static gssize
432g_buffered_output_stream_write  (GOutputStream *stream,
433                                 const void    *buffer,
434                                 gsize          count,
435                                 GCancellable  *cancellable,
436                                 GError       **error)
437{
438  GBufferedOutputStream        *bstream;
439  GBufferedOutputStreamPrivate *priv;
440  gboolean res;
441  gsize    n;
442  gsize new_size;
443
444  bstream = G_BUFFERED_OUTPUT_STREAM (stream);
445  priv = bstream->priv;
446
447  n = priv->len - priv->pos;
448
449  if (priv->auto_grow && n < count)
450    {
451      new_size = MAX (priv->len * 2, priv->len + count);
452      g_buffered_output_stream_set_buffer_size (bstream, new_size);
453    }
454  else if (n == 0)
455    {
456      res = flush_buffer (bstream, cancellable, error);
457
458      if (res == FALSE)
459	return -1;
460    }
461
462  n = priv->len - priv->pos;
463
464  count = MIN (count, n);
465  memcpy (priv->buffer + priv->pos, buffer, count);
466  priv->pos += count;
467
468  return count;
469}
470
471static gboolean
472g_buffered_output_stream_flush (GOutputStream  *stream,
473                                GCancellable   *cancellable,
474                                GError        **error)
475{
476  GBufferedOutputStream *bstream;
477  GBufferedOutputStreamPrivate *priv;
478  GOutputStream                *base_stream;
479  gboolean res;
480
481  bstream = G_BUFFERED_OUTPUT_STREAM (stream);
482  priv = bstream->priv;
483  base_stream = G_FILTER_OUTPUT_STREAM (stream)->base_stream;
484
485  res = flush_buffer (bstream, cancellable, error);
486
487  if (res == FALSE)
488    return FALSE;
489
490  res = g_output_stream_flush (base_stream, cancellable, error);
491
492  return res;
493}
494
495static gboolean
496g_buffered_output_stream_close (GOutputStream  *stream,
497                                GCancellable   *cancellable,
498                                GError        **error)
499{
500  GBufferedOutputStream        *bstream;
501  GBufferedOutputStreamPrivate *priv;
502  GOutputStream                *base_stream;
503  gboolean                      res;
504
505  bstream = G_BUFFERED_OUTPUT_STREAM (stream);
506  priv = bstream->priv;
507  base_stream = G_FILTER_OUTPUT_STREAM (bstream)->base_stream;
508
509  res = flush_buffer (bstream, cancellable, error);
510
511  /* report the first error but still close the stream */
512  if (res)
513    res = g_output_stream_close (base_stream, cancellable, error);
514  else
515    g_output_stream_close (base_stream, cancellable, NULL);
516
517  return res;
518}
519
520/* ************************** */
521/* Async stuff implementation */
522/* ************************** */
523
524/* TODO: This should be using the base class async ops, not threads */
525
526typedef struct {
527
528  guint flush_stream : 1;
529  guint close_stream : 1;
530
531} FlushData;
532
533static void
534free_flush_data (gpointer data)
535{
536  g_slice_free (FlushData, data);
537}
538
539/* This function is used by all three (i.e.
540 * _write, _flush, _close) functions since
541 * all of them will need to flush the buffer
542 * and so closing and writing is just a special
543 * case of flushing + some addition stuff */
544static void
545flush_buffer_thread (GSimpleAsyncResult *result,
546                     GObject            *object,
547                     GCancellable       *cancellable)
548{
549  GBufferedOutputStream *stream;
550  GOutputStream *base_stream;
551  FlushData     *fdata;
552  gboolean       res;
553  GError        *error = NULL;
554
555  stream = G_BUFFERED_OUTPUT_STREAM (object);
556  fdata = g_simple_async_result_get_op_res_gpointer (result);
557  base_stream = G_FILTER_OUTPUT_STREAM (stream)->base_stream;
558
559  res = flush_buffer (stream, cancellable, &error);
560
561  /* if flushing the buffer didn't work don't even bother
562   * to flush the stream but just report that error */
563  if (res && fdata->flush_stream)
564    res = g_output_stream_flush (base_stream, cancellable, &error);
565
566  if (fdata->close_stream)
567    {
568
569      /* if flushing the buffer or the stream returned
570       * an error report that first error but still try
571       * close the stream */
572      if (res == FALSE)
573        g_output_stream_close (base_stream, cancellable, NULL);
574      else
575        res = g_output_stream_close (base_stream, cancellable, &error);
576    }
577
578  if (res == FALSE)
579    {
580      g_simple_async_result_set_from_error (result, error);
581      g_error_free (error);
582    }
583}
584
585typedef struct {
586
587  FlushData fdata;
588
589  gsize  count;
590  const void  *buffer;
591
592} WriteData;
593
594static void
595free_write_data (gpointer data)
596{
597  g_slice_free (WriteData, data);
598}
599
600static void
601g_buffered_output_stream_write_async (GOutputStream        *stream,
602                                      const void           *buffer,
603                                      gsize                 count,
604                                      int                   io_priority,
605                                      GCancellable         *cancellable,
606                                      GAsyncReadyCallback   callback,
607                                      gpointer              data)
608{
609  GBufferedOutputStream *buffered_stream;
610  GBufferedOutputStreamPrivate *priv;
611  GSimpleAsyncResult *res;
612  WriteData *wdata;
613
614  buffered_stream = G_BUFFERED_OUTPUT_STREAM (stream);
615  priv = buffered_stream->priv;
616
617  wdata = g_slice_new (WriteData);
618  wdata->count  = count;
619  wdata->buffer = buffer;
620
621  res = g_simple_async_result_new (G_OBJECT (stream),
622                                   callback,
623                                   data,
624                                   g_buffered_output_stream_write_async);
625
626  g_simple_async_result_set_op_res_gpointer (res, wdata, free_write_data);
627
628  /* if we have space left directly call the
629   * callback (from idle) otherwise schedule a buffer
630   * flush in the thread. In both cases the actual
631   * copying of the data to the buffer will be done in
632   * the write_finish () func since that should
633   * be fast enough */
634  if (priv->len - priv->pos > 0)
635    {
636      g_simple_async_result_complete_in_idle (res);
637    }
638  else
639    {
640      wdata->fdata.flush_stream = FALSE;
641      wdata->fdata.close_stream = FALSE;
642      g_simple_async_result_run_in_thread (res,
643                                           flush_buffer_thread,
644                                           io_priority,
645                                           cancellable);
646      g_object_unref (res);
647    }
648}
649
650static gssize
651g_buffered_output_stream_write_finish (GOutputStream        *stream,
652                                       GAsyncResult         *result,
653                                       GError              **error)
654{
655  GBufferedOutputStreamPrivate *priv;
656  GBufferedOutputStream        *buffered_stream;
657  GSimpleAsyncResult *simple;
658  WriteData          *wdata;
659  gssize              count;
660
661  simple = G_SIMPLE_ASYNC_RESULT (result);
662  buffered_stream = G_BUFFERED_OUTPUT_STREAM (stream);
663  priv = buffered_stream->priv;
664
665  g_warn_if_fail (g_simple_async_result_get_source_tag (simple) ==
666            g_buffered_output_stream_write_async);
667
668  wdata = g_simple_async_result_get_op_res_gpointer (simple);
669
670  /* Now do the real copying of data to the buffer */
671  count = priv->len - priv->pos;
672  count = MIN (wdata->count, count);
673
674  memcpy (priv->buffer + priv->pos, wdata->buffer, count);
675
676  priv->pos += count;
677
678  return count;
679}
680
681static void
682g_buffered_output_stream_flush_async (GOutputStream        *stream,
683                                      int                   io_priority,
684                                      GCancellable         *cancellable,
685                                      GAsyncReadyCallback   callback,
686                                      gpointer              data)
687{
688  GSimpleAsyncResult *res;
689  FlushData          *fdata;
690
691  fdata = g_slice_new (FlushData);
692  fdata->flush_stream = TRUE;
693  fdata->close_stream = FALSE;
694
695  res = g_simple_async_result_new (G_OBJECT (stream),
696                                   callback,
697                                   data,
698                                   g_buffered_output_stream_flush_async);
699
700  g_simple_async_result_set_op_res_gpointer (res, fdata, free_flush_data);
701
702  g_simple_async_result_run_in_thread (res,
703                                       flush_buffer_thread,
704                                       io_priority,
705                                       cancellable);
706  g_object_unref (res);
707}
708
709static gboolean
710g_buffered_output_stream_flush_finish (GOutputStream        *stream,
711                                       GAsyncResult         *result,
712                                       GError              **error)
713{
714  GSimpleAsyncResult *simple;
715
716  simple = G_SIMPLE_ASYNC_RESULT (result);
717
718  g_warn_if_fail (g_simple_async_result_get_source_tag (simple) ==
719            g_buffered_output_stream_flush_async);
720
721  return TRUE;
722}
723
724static void
725g_buffered_output_stream_close_async (GOutputStream        *stream,
726                                      int                   io_priority,
727                                      GCancellable         *cancellable,
728                                      GAsyncReadyCallback   callback,
729                                      gpointer              data)
730{
731  GSimpleAsyncResult *res;
732  FlushData          *fdata;
733
734  fdata = g_slice_new (FlushData);
735  fdata->close_stream = TRUE;
736
737  res = g_simple_async_result_new (G_OBJECT (stream),
738                                   callback,
739                                   data,
740                                   g_buffered_output_stream_close_async);
741
742  g_simple_async_result_set_op_res_gpointer (res, fdata, free_flush_data);
743
744  g_simple_async_result_run_in_thread (res,
745                                       flush_buffer_thread,
746                                       io_priority,
747                                       cancellable);
748  g_object_unref (res);
749}
750
751static gboolean
752g_buffered_output_stream_close_finish (GOutputStream        *stream,
753                                       GAsyncResult         *result,
754                                       GError              **error)
755{
756  GSimpleAsyncResult *simple;
757
758  simple = G_SIMPLE_ASYNC_RESULT (result);
759
760  g_warn_if_fail (g_simple_async_result_get_source_tag (simple) ==
761            g_buffered_output_stream_flush_async);
762
763  return TRUE;
764}
765
766#define __G_BUFFERED_OUTPUT_STREAM_C__
767#include "gioaliasdef.c"
768