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1 office 1 /* GIO - GLib Input, Output and Streaming Library
2 *
3 * Copyright © 2008 Christian Kellner, Samuel Cormier-Iijima
4 * © 2009 codethink
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General
17 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 *
19 * Authors: Christian Kellner <gicmo@gnome.org>
20 * Samuel Cormier-Iijima <sciyoshi@gmail.com>
21 * Ryan Lortie <desrt@desrt.ca>
22 */
23  
24 #include "config.h"
25 #include "gsocketinputstream.h"
26 #include "glibintl.h"
27  
28 #include "gcancellable.h"
29 #include "gpollableinputstream.h"
30 #include "gioerror.h"
31 #include "gfiledescriptorbased.h"
32  
33 struct _GSocketInputStreamPrivate
34 {
35 GSocket *socket;
36  
37 /* pending operation metadata */
38 gpointer buffer;
39 gsize count;
40 };
41  
42 static void g_socket_input_stream_pollable_iface_init (GPollableInputStreamInterface *iface);
43 #ifdef G_OS_UNIX
44 static void g_socket_input_stream_file_descriptor_based_iface_init (GFileDescriptorBasedIface *iface);
45 #endif
46  
47 #define g_socket_input_stream_get_type _g_socket_input_stream_get_type
48  
49 #ifdef G_OS_UNIX
50 G_DEFINE_TYPE_WITH_CODE (GSocketInputStream, g_socket_input_stream, G_TYPE_INPUT_STREAM,
51 G_ADD_PRIVATE (GSocketInputStream)
52 G_IMPLEMENT_INTERFACE (G_TYPE_POLLABLE_INPUT_STREAM, g_socket_input_stream_pollable_iface_init)
53 G_IMPLEMENT_INTERFACE (G_TYPE_FILE_DESCRIPTOR_BASED, g_socket_input_stream_file_descriptor_based_iface_init)
54 )
55 #else
56 G_DEFINE_TYPE_WITH_CODE (GSocketInputStream, g_socket_input_stream, G_TYPE_INPUT_STREAM,
57 G_ADD_PRIVATE (GSocketInputStream)
58 G_IMPLEMENT_INTERFACE (G_TYPE_POLLABLE_INPUT_STREAM, g_socket_input_stream_pollable_iface_init)
59 )
60 #endif
61  
62 enum
63 {
64 PROP_0,
65 PROP_SOCKET
66 };
67  
68 static void
69 g_socket_input_stream_get_property (GObject *object,
70 guint prop_id,
71 GValue *value,
72 GParamSpec *pspec)
73 {
74 GSocketInputStream *stream = G_SOCKET_INPUT_STREAM (object);
75  
76 switch (prop_id)
77 {
78 case PROP_SOCKET:
79 g_value_set_object (value, stream->priv->socket);
80 break;
81  
82 default:
83 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
84 }
85 }
86  
87 static void
88 g_socket_input_stream_set_property (GObject *object,
89 guint prop_id,
90 const GValue *value,
91 GParamSpec *pspec)
92 {
93 GSocketInputStream *stream = G_SOCKET_INPUT_STREAM (object);
94  
95 switch (prop_id)
96 {
97 case PROP_SOCKET:
98 stream->priv->socket = g_value_dup_object (value);
99 break;
100  
101 default:
102 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
103 }
104 }
105  
106 static void
107 g_socket_input_stream_finalize (GObject *object)
108 {
109 GSocketInputStream *stream = G_SOCKET_INPUT_STREAM (object);
110  
111 if (stream->priv->socket)
112 g_object_unref (stream->priv->socket);
113  
114 G_OBJECT_CLASS (g_socket_input_stream_parent_class)->finalize (object);
115 }
116  
117 static gssize
118 g_socket_input_stream_read (GInputStream *stream,
119 void *buffer,
120 gsize count,
121 GCancellable *cancellable,
122 GError **error)
123 {
124 GSocketInputStream *input_stream = G_SOCKET_INPUT_STREAM (stream);
125  
126 return g_socket_receive_with_blocking (input_stream->priv->socket,
127 buffer, count, TRUE,
128 cancellable, error);
129 }
130  
131 static gboolean
132 g_socket_input_stream_pollable_is_readable (GPollableInputStream *pollable)
133 {
134 GSocketInputStream *input_stream = G_SOCKET_INPUT_STREAM (pollable);
135  
136 return g_socket_condition_check (input_stream->priv->socket, G_IO_IN);
137 }
138  
139 static GSource *
140 g_socket_input_stream_pollable_create_source (GPollableInputStream *pollable,
141 GCancellable *cancellable)
142 {
143 GSocketInputStream *input_stream = G_SOCKET_INPUT_STREAM (pollable);
144 GSource *socket_source, *pollable_source;
145  
146 pollable_source = g_pollable_source_new (G_OBJECT (input_stream));
147 socket_source = g_socket_create_source (input_stream->priv->socket,
148 G_IO_IN, cancellable);
149 g_source_set_dummy_callback (socket_source);
150 g_source_add_child_source (pollable_source, socket_source);
151 g_source_unref (socket_source);
152  
153 return pollable_source;
154 }
155  
156 static gssize
157 g_socket_input_stream_pollable_read_nonblocking (GPollableInputStream *pollable,
158 void *buffer,
159 gsize size,
160 GError **error)
161 {
162 GSocketInputStream *input_stream = G_SOCKET_INPUT_STREAM (pollable);
163  
164 return g_socket_receive_with_blocking (input_stream->priv->socket,
165 buffer, size, FALSE,
166 NULL, error);
167 }
168  
169 #ifdef G_OS_UNIX
170 static int
171 g_socket_input_stream_get_fd (GFileDescriptorBased *fd_based)
172 {
173 GSocketInputStream *input_stream = G_SOCKET_INPUT_STREAM (fd_based);
174  
175 return g_socket_get_fd (input_stream->priv->socket);
176 }
177 #endif
178  
179 static void
180 g_socket_input_stream_class_init (GSocketInputStreamClass *klass)
181 {
182 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
183 GInputStreamClass *ginputstream_class = G_INPUT_STREAM_CLASS (klass);
184  
185 gobject_class->finalize = g_socket_input_stream_finalize;
186 gobject_class->get_property = g_socket_input_stream_get_property;
187 gobject_class->set_property = g_socket_input_stream_set_property;
188  
189 ginputstream_class->read_fn = g_socket_input_stream_read;
190  
191 g_object_class_install_property (gobject_class, PROP_SOCKET,
192 g_param_spec_object ("socket",
193 P_("socket"),
194 P_("The socket that this stream wraps"),
195 G_TYPE_SOCKET, G_PARAM_CONSTRUCT_ONLY |
196 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
197 }
198  
199 #ifdef G_OS_UNIX
200 static void
201 g_socket_input_stream_file_descriptor_based_iface_init (GFileDescriptorBasedIface *iface)
202 {
203 iface->get_fd = g_socket_input_stream_get_fd;
204 }
205 #endif
206  
207 static void
208 g_socket_input_stream_pollable_iface_init (GPollableInputStreamInterface *iface)
209 {
210 iface->is_readable = g_socket_input_stream_pollable_is_readable;
211 iface->create_source = g_socket_input_stream_pollable_create_source;
212 iface->read_nonblocking = g_socket_input_stream_pollable_read_nonblocking;
213 }
214  
215 static void
216 g_socket_input_stream_init (GSocketInputStream *stream)
217 {
218 stream->priv = g_socket_input_stream_get_instance_private (stream);
219 }
220  
221 GSocketInputStream *
222 _g_socket_input_stream_new (GSocket *socket)
223 {
224 return g_object_new (G_TYPE_SOCKET_INPUT_STREAM, "socket", socket, NULL);
225 }