1 /* GIO - GLib Input, Output and Streaming Library
3 * Copyright (C) 2006-2010 Red Hat, Inc.
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.
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.
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.
20 * Author: Alexander Larsson <alexl@redhat.com>
21 * Author: Tor Lillqvist <tml@iki.fi>
32 #include "gsimpleasyncresult.h"
33 #include "gwin32inputstream.h"
34 #include "giowin32-priv.h"
35 #include "gcancellable.h"
36 #include "gasynchelper.h"
41 * SECTION:gwin32inputstream
42 * @short_description: Streaming input operations for Windows file handles
43 * @include: gio/gwin32inputstream.h
44 * @see_also: #GInputStream
46 * #GWin32InputStream implements #GInputStream for reading from a
47 * Windows file handle.
49 * Note that <filename><gio/gwin32inputstream.h></filename> belongs
50 * to the Windows-specific GIO interfaces, thus you have to use the
51 * <filename>gio-windows-2.0.pc</filename> pkg-config file when using it.
60 struct _GWin32InputStreamPrivate
{
62 gboolean close_handle
;
66 G_DEFINE_TYPE_WITH_PRIVATE (GWin32InputStream
, g_win32_input_stream
, G_TYPE_INPUT_STREAM
)
68 static void g_win32_input_stream_set_property (GObject
*object
,
72 static void g_win32_input_stream_get_property (GObject
*object
,
76 static gssize
g_win32_input_stream_read (GInputStream
*stream
,
79 GCancellable
*cancellable
,
81 static gboolean
g_win32_input_stream_close (GInputStream
*stream
,
82 GCancellable
*cancellable
,
86 g_win32_input_stream_class_init (GWin32InputStreamClass
*klass
)
88 GObjectClass
*gobject_class
= G_OBJECT_CLASS (klass
);
89 GInputStreamClass
*stream_class
= G_INPUT_STREAM_CLASS (klass
);
91 gobject_class
->get_property
= g_win32_input_stream_get_property
;
92 gobject_class
->set_property
= g_win32_input_stream_set_property
;
94 stream_class
->read_fn
= g_win32_input_stream_read
;
95 stream_class
->close_fn
= g_win32_input_stream_close
;
98 * GWin32InputStream:handle:
100 * The handle that the stream reads from.
104 g_object_class_install_property (gobject_class
,
106 g_param_spec_pointer ("handle",
108 P_("The file handle to read from"),
109 G_PARAM_READABLE
| G_PARAM_WRITABLE
| G_PARAM_CONSTRUCT_ONLY
| G_PARAM_STATIC_NAME
| G_PARAM_STATIC_NICK
| G_PARAM_STATIC_BLURB
));
112 * GWin32InputStream:close-handle:
114 * Whether to close the file handle when the stream is closed.
118 g_object_class_install_property (gobject_class
,
120 g_param_spec_boolean ("close-handle",
121 P_("Close file handle"),
122 P_("Whether to close the file handle when the stream is closed"),
124 G_PARAM_READABLE
| G_PARAM_WRITABLE
| G_PARAM_STATIC_NAME
| G_PARAM_STATIC_NICK
| G_PARAM_STATIC_BLURB
));
128 g_win32_input_stream_set_property (GObject
*object
,
133 GWin32InputStream
*win32_stream
;
135 win32_stream
= G_WIN32_INPUT_STREAM (object
);
140 win32_stream
->priv
->handle
= g_value_get_pointer (value
);
142 case PROP_CLOSE_HANDLE
:
143 win32_stream
->priv
->close_handle
= g_value_get_boolean (value
);
146 G_OBJECT_WARN_INVALID_PROPERTY_ID (object
, prop_id
, pspec
);
152 g_win32_input_stream_get_property (GObject
*object
,
157 GWin32InputStream
*win32_stream
;
159 win32_stream
= G_WIN32_INPUT_STREAM (object
);
164 g_value_set_pointer (value
, win32_stream
->priv
->handle
);
166 case PROP_CLOSE_HANDLE
:
167 g_value_set_boolean (value
, win32_stream
->priv
->close_handle
);
170 G_OBJECT_WARN_INVALID_PROPERTY_ID (object
, prop_id
, pspec
);
175 g_win32_input_stream_init (GWin32InputStream
*win32_stream
)
177 win32_stream
->priv
= g_win32_input_stream_get_instance_private (win32_stream
);
178 win32_stream
->priv
->handle
= NULL
;
179 win32_stream
->priv
->close_handle
= TRUE
;
180 win32_stream
->priv
->fd
= -1;
184 * g_win32_input_stream_new:
185 * @handle: a Win32 file handle
186 * @close_handle: %TRUE to close the handle when done
188 * Creates a new #GWin32InputStream for the given @handle.
190 * If @close_handle is %TRUE, the handle will be closed
191 * when the stream is closed.
193 * Note that "handle" here means a Win32 HANDLE, not a "file descriptor"
194 * as used in the Windows C libraries.
196 * Returns: a new #GWin32InputStream
199 g_win32_input_stream_new (void *handle
,
200 gboolean close_handle
)
202 GWin32InputStream
*stream
;
204 g_return_val_if_fail (handle
!= NULL
, NULL
);
206 stream
= g_object_new (G_TYPE_WIN32_INPUT_STREAM
,
208 "close-handle", close_handle
,
211 return G_INPUT_STREAM (stream
);
215 * g_win32_input_stream_set_close_handle:
216 * @stream: a #GWin32InputStream
217 * @close_handle: %TRUE to close the handle when done
219 * Sets whether the handle of @stream shall be closed
220 * when the stream is closed.
225 g_win32_input_stream_set_close_handle (GWin32InputStream
*stream
,
226 gboolean close_handle
)
228 g_return_if_fail (G_IS_WIN32_INPUT_STREAM (stream
));
230 close_handle
= close_handle
!= FALSE
;
231 if (stream
->priv
->close_handle
!= close_handle
)
233 stream
->priv
->close_handle
= close_handle
;
234 g_object_notify (G_OBJECT (stream
), "close-handle");
239 * g_win32_input_stream_get_close_handle:
240 * @stream: a #GWin32InputStream
242 * Returns whether the handle of @stream will be
243 * closed when the stream is closed.
245 * Return value: %TRUE if the handle is closed when done
250 g_win32_input_stream_get_close_handle (GWin32InputStream
*stream
)
252 g_return_val_if_fail (G_IS_WIN32_INPUT_STREAM (stream
), FALSE
);
254 return stream
->priv
->close_handle
;
258 * g_win32_input_stream_get_handle:
259 * @stream: a #GWin32InputStream
261 * Return the Windows file handle that the stream reads from.
263 * Return value: The file handle of @stream
268 g_win32_input_stream_get_handle (GWin32InputStream
*stream
)
270 g_return_val_if_fail (G_IS_WIN32_INPUT_STREAM (stream
), NULL
);
272 return stream
->priv
->handle
;
276 g_win32_input_stream_read (GInputStream
*stream
,
279 GCancellable
*cancellable
,
282 GWin32InputStream
*win32_stream
;
285 OVERLAPPED overlap
= { 0, };
288 win32_stream
= G_WIN32_INPUT_STREAM (stream
);
290 if (g_cancellable_set_error_if_cancelled (cancellable
, error
))
293 if (count
> G_MAXINT
)
298 overlap
.hEvent
= CreateEvent (NULL
, FALSE
, FALSE
, NULL
);
299 g_return_val_if_fail (overlap
.hEvent
!= NULL
, -1);
301 res
= ReadFile (win32_stream
->priv
->handle
, buffer
, nbytes
, &nread
, &overlap
);
306 int errsv
= GetLastError ();
308 if (errsv
== ERROR_IO_PENDING
&&
309 _g_win32_overlap_wait_result (win32_stream
->priv
->handle
,
310 &overlap
, &nread
, cancellable
))
316 if (g_cancellable_set_error_if_cancelled (cancellable
, error
))
319 errsv
= GetLastError ();
320 if (errsv
== ERROR_MORE_DATA
)
322 /* If a named pipe is being read in message mode and the
323 * next message is longer than the nNumberOfBytesToRead
324 * parameter specifies, ReadFile returns FALSE and
325 * GetLastError returns ERROR_MORE_DATA */
329 else if (errsv
== ERROR_HANDLE_EOF
||
330 errsv
== ERROR_BROKEN_PIPE
)
332 /* TODO: the other end of a pipe may call the WriteFile
333 * function with nNumberOfBytesToWrite set to zero. In this
334 * case, it's not possible for the caller to know if it's
335 * broken pipe or a read of 0. Perhaps we should add a
336 * is_broken flag for this win32 case.. */
343 emsg
= g_win32_error_message (errsv
);
344 g_set_error (error
, G_IO_ERROR
,
345 g_io_error_from_win32_error (errsv
),
346 _("Error reading from handle: %s"),
353 CloseHandle (overlap
.hEvent
);
358 g_win32_input_stream_close (GInputStream
*stream
,
359 GCancellable
*cancellable
,
362 GWin32InputStream
*win32_stream
;
365 win32_stream
= G_WIN32_INPUT_STREAM (stream
);
367 if (!win32_stream
->priv
->close_handle
)
370 if (win32_stream
->priv
->fd
!= -1)
372 if (close (win32_stream
->priv
->fd
) < 0)
374 g_set_error_literal (error
, G_IO_ERROR
,
375 g_io_error_from_errno (errno
),
382 res
= CloseHandle (win32_stream
->priv
->handle
);
385 int errsv
= GetLastError ();
386 gchar
*emsg
= g_win32_error_message (errsv
);
388 g_set_error (error
, G_IO_ERROR
,
389 g_io_error_from_win32_error (errsv
),
390 _("Error closing handle: %s"),
401 g_win32_input_stream_new_from_fd (gint fd
,
404 GWin32InputStream
*win32_stream
;
406 win32_stream
= G_WIN32_INPUT_STREAM (g_win32_input_stream_new ((HANDLE
) _get_osfhandle (fd
), close_fd
));
407 win32_stream
->priv
->fd
= fd
;
409 return (GInputStream
*)win32_stream
;