2 * Amanda, The Advanced Maryland Automatic Network Disk Archiver
3 * Copyright (c) 2008-2012 Zmanda, Inc. All Rights Reserved.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published
7 * by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 * Contact information: Zmanda Inc., 465 S. Mathilda Ave., Suite 300
19 * Sunnyvale, CA 94085, USA, or: http://www.zmanda.com
25 /* parent class for XferElement */
26 static GObjectClass *parent_class = NULL;
28 /* parent class for XferDest, XferFilter, and XferSource */
29 static XferElementClass *xfer_element_class = NULL;
31 /***********************
39 xe->output_mech = XFER_MECH_NONE;
40 xe->input_mech = XFER_MECH_NONE;
41 xe->upstream = xe->downstream = NULL;
42 xe->_input_fd = xe->_output_fd = -1;
47 xfer_element_setup_impl(
48 XferElement *elt G_GNUC_UNUSED)
50 return TRUE; /* success */
54 xfer_element_set_size_impl(
55 XferElement *elt G_GNUC_UNUSED,
56 gint64 size G_GNUC_UNUSED)
60 return TRUE; /* success */
64 xfer_element_start_impl(
65 XferElement *elt G_GNUC_UNUSED)
67 return FALSE; /* will not send XMSG_DONE */
71 xfer_element_cancel_impl(
75 elt->cancelled = TRUE;
76 elt->expect_eof = expect_eof;
77 return elt->can_generate_eof;
81 xfer_element_pull_buffer_impl(
82 XferElement *elt G_GNUC_UNUSED,
83 size_t *size G_GNUC_UNUSED)
89 xfer_element_push_buffer_impl(
90 XferElement *elt G_GNUC_UNUSED,
91 gpointer buf G_GNUC_UNUSED,
92 size_t size G_GNUC_UNUSED)
96 static xfer_element_mech_pair_t *
97 xfer_element_get_mech_pairs_impl(
100 return XFER_ELEMENT_GET_CLASS(elt)->mech_pairs;
104 xfer_element_repr_impl(
108 elt->repr = newvstrallocf(elt->repr, "<%s@%p>",
109 G_OBJECT_TYPE_NAME(G_OBJECT(elt)),
117 xfer_element_finalize(
120 XferElement *elt = XFER_ELEMENT(obj_self);
123 /* free the repr cache */
124 if (elt->repr) g_free(elt->repr);
126 /* close up the input/output file descriptors, being careful to do so
127 * atomically, and making any errors doing so into mere warnings */
128 fd = xfer_element_swap_input_fd(elt, -1);
129 if (fd != -1 && close(fd) != 0)
130 g_warning("error closing fd %d: %s", fd, strerror(errno));
131 fd = xfer_element_swap_output_fd(elt, -1);
132 if (fd != -1 && close(fd) != 0)
133 g_warning("error closing fd %d: %s", fd, strerror(errno));
136 G_OBJECT_CLASS(parent_class)->finalize(obj_self);
140 xfer_element_class_init(
141 XferElementClass * klass)
143 GObjectClass *goc = (GObjectClass*) klass;
145 klass->repr = xfer_element_repr_impl;
146 klass->setup = xfer_element_setup_impl;
147 klass->set_size = xfer_element_set_size_impl;
148 klass->start = xfer_element_start_impl;
149 klass->cancel = xfer_element_cancel_impl;
150 klass->pull_buffer = xfer_element_pull_buffer_impl;
151 klass->push_buffer = xfer_element_push_buffer_impl;
152 klass->get_mech_pairs = xfer_element_get_mech_pairs_impl;
154 goc->finalize = xfer_element_finalize;
156 klass->perl_class = NULL;
158 parent_class = g_type_class_peek_parent(klass);
159 xfer_element_class = klass;
163 xfer_element_get_type(void)
165 static GType type = 0;
167 if G_UNLIKELY(type == 0) {
168 static const GTypeInfo info = {
169 sizeof (XferElementClass),
170 (GBaseInitFunc) NULL,
171 (GBaseFinalizeFunc) NULL,
172 (GClassInitFunc) xfer_element_class_init,
173 (GClassFinalizeFunc) NULL,
174 NULL /* class_data */,
175 sizeof (XferElement),
177 (GInstanceInitFunc) xfer_element_init,
181 type = g_type_register_static (G_TYPE_OBJECT, "XferElement", &info,
182 (GTypeFlags)G_TYPE_FLAG_ABSTRACT);
196 if (elt) g_object_unref(elt);
203 return XFER_ELEMENT_GET_CLASS(elt)->repr(elt);
210 return XFER_ELEMENT_GET_CLASS(elt)->setup(elt);
214 xfer_element_set_size(
218 return XFER_ELEMENT_GET_CLASS(elt)->set_size(elt, size);
225 return XFER_ELEMENT_GET_CLASS(elt)->start(elt);
233 return XFER_ELEMENT_GET_CLASS(elt)->cancel(elt, expect_eof);
237 xfer_element_pull_buffer(
242 /* Make sure that the xfer is running before calling upstream's
243 * pull_buffer method; this avoids a race condition where upstream
244 * hasn't finished its xfer_element_start yet, and isn't ready for
246 g_mutex_lock(elt->xfer->status_mutex);
247 status = elt->xfer->status;
248 g_mutex_unlock(elt->xfer->status_mutex);
249 if (status == XFER_START)
250 wait_until_xfer_running(elt->xfer);
252 return XFER_ELEMENT_GET_CLASS(elt)->pull_buffer(elt, size);
256 xfer_element_push_buffer(
261 /* There is no race condition with push_buffer, because downstream
262 * elements are started first. */
263 XFER_ELEMENT_GET_CLASS(elt)->push_buffer(elt, buf, size);
266 xfer_element_mech_pair_t *
267 xfer_element_get_mech_pairs(
270 return XFER_ELEMENT_GET_CLASS(elt)->get_mech_pairs(elt);
278 xfer_element_drain_buffers(
279 XferElement *upstream)
284 while ((buf =xfer_element_pull_buffer(upstream, &size))) {
290 xfer_element_drain_fd(
297 len = full_read(fd, buf, sizeof(buf));
298 if (len < sizeof(buf))