460b9539 |
1 | /* |
2 | * This file is part of DisOrder. |
3 | * Copyright (C) 2006 Richard Kettlewell |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by |
7 | * the Free Software Foundation; either version 2 of the License, or |
8 | * (at your option) any later version. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, but |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | * General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, write to the Free Software |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
18 | * USA |
19 | */ |
20 | |
21 | #include "disobedience.h" |
22 | |
23 | /* GSource subclass for disorder_eclient */ |
24 | struct eclient_source { |
25 | GSource gsource; |
26 | disorder_eclient *client; |
27 | time_t last_poll; |
28 | GPollFD pollfd; |
29 | }; |
30 | |
31 | /* Called before FDs are polled to choose a timeout. We ask for a 3s |
32 | * timeout and every 10s or so we force a dispatch. */ |
33 | static gboolean gtkclient_prepare(GSource *source, |
34 | gint *timeout) { |
35 | const struct eclient_source *esource = (struct eclient_source *)source; |
36 | D(("gtkclient_prepare")); |
37 | if(time(0) > esource->last_poll + 10) |
38 | return TRUE; /* timed out */ |
39 | *timeout = 3000/*milliseconds*/; |
40 | return FALSE; /* please poll */ |
41 | } |
42 | |
43 | /* Check whether we're ready to dispatch. */ |
44 | static gboolean gtkclient_check(GSource *source) { |
45 | const struct eclient_source *esource = (struct eclient_source *)source; |
46 | D(("gtkclient_check fd=%d events=%x revents=%x", |
47 | esource->pollfd.fd, esource->pollfd.events, esource->pollfd.revents)); |
48 | return esource->pollfd.fd != -1 && esource->pollfd.revents != 0; |
49 | } |
50 | |
51 | /* Dispatch */ |
52 | static gboolean gtkclient_dispatch(GSource *source, |
53 | GSourceFunc attribute((unused)) callback, |
54 | gpointer attribute((unused)) user_data) { |
55 | struct eclient_source *esource = (struct eclient_source *)source; |
56 | unsigned revents, mode; |
57 | |
58 | D(("gtkclient_dispatch")); |
59 | revents = esource->pollfd.revents & esource->pollfd.events; |
60 | mode = 0; |
61 | if(revents & (G_IO_IN|G_IO_HUP|G_IO_ERR)) |
62 | mode |= DISORDER_POLL_READ; |
63 | if(revents & (G_IO_OUT|G_IO_HUP|G_IO_ERR)) |
64 | mode |= DISORDER_POLL_WRITE; |
65 | time(&esource->last_poll); |
66 | disorder_eclient_polled(esource->client, mode); |
67 | return TRUE; /* ??? not documented */ |
68 | } |
69 | |
70 | /* Table of callbacks for GSource subclass */ |
71 | static const GSourceFuncs sourcefuncs = { |
72 | gtkclient_prepare, |
73 | gtkclient_check, |
74 | gtkclient_dispatch, |
75 | 0, |
76 | 0, |
77 | 0, |
78 | }; |
79 | |
80 | /* Tell the mainloop what we need */ |
81 | static void gtkclient_poll(void *u, |
82 | disorder_eclient attribute((unused)) *c, |
83 | int fd, unsigned mode) { |
84 | struct eclient_source *esource = u; |
85 | GSource *source = u; |
86 | |
87 | D(("gtkclient_poll fd=%d mode=%x", fd, mode)); |
88 | /* deconfigure the source if currently configured */ |
89 | if(esource->pollfd.fd != -1) { |
90 | D(("calling g_source_remove_poll")); |
91 | g_source_remove_poll(source, &esource->pollfd); |
92 | esource->pollfd.fd = -1; |
93 | esource->pollfd.events = 0; |
94 | } |
95 | /* install new settings */ |
96 | if(fd != -1 && mode) { |
97 | esource->pollfd.fd = fd; |
98 | esource->pollfd.events = 0; |
99 | if(mode & DISORDER_POLL_READ) |
100 | esource->pollfd.events |= G_IO_IN | G_IO_HUP | G_IO_ERR; |
101 | if(mode & DISORDER_POLL_WRITE) |
102 | esource->pollfd.events |= G_IO_OUT | G_IO_ERR; |
103 | /* reconfigure the source */ |
104 | D(("calling g_source_add_poll")); |
105 | g_source_add_poll(source, &esource->pollfd); |
106 | } |
107 | } |
108 | |
109 | /* Report a communication-level error. It will be automatically retried. */ |
110 | static void gtkclient_comms_error(void attribute((unused)) *u, |
111 | const char *msg) { |
112 | D(("gtkclient_comms_error %s", msg)); |
113 | gtk_label_set_text(GTK_LABEL(report_label), msg); |
114 | } |
115 | |
116 | /* Report a protocol error. It will not be retried. We offer a callback to |
117 | * the submitter of the original command and if none is supplied we pop up an |
118 | * error box. */ |
119 | static void gtkclient_protocol_error(void attribute((unused)) *u, |
120 | void *v, |
121 | int code, |
122 | const char *msg) { |
123 | struct callbackdata *cbd = v; |
124 | |
125 | D(("gtkclient_protocol_error %s", msg)); |
126 | if(cbd && cbd->onerror) |
127 | cbd->onerror(cbd, code, msg); |
128 | else |
129 | popup_protocol_error(code, msg); |
130 | } |
131 | |
132 | static void gtkclient_report(void attribute((unused)) *u, |
133 | const char *msg) { |
134 | if(!msg) |
135 | /* We're idle - clear the report line */ |
136 | gtk_label_set_text(GTK_LABEL(report_label), ""); |
137 | } |
138 | |
139 | void popup_protocol_error(int attribute((unused)) code, |
140 | const char *msg) { |
141 | gtk_label_set_text(GTK_LABEL(report_label), msg); |
142 | popup_error(msg); |
143 | } |
144 | |
145 | /* Table of eclient callbacks */ |
146 | static const disorder_eclient_callbacks gtkclient_callbacks = { |
147 | gtkclient_comms_error, |
148 | gtkclient_protocol_error, |
149 | gtkclient_poll, |
150 | gtkclient_report |
151 | }; |
152 | |
153 | /* Create an eclient using the GLib main loop */ |
154 | disorder_eclient *gtkclient(void) { |
155 | GSource *source; |
156 | struct eclient_source *esource; |
157 | |
158 | D(("gtkclient")); |
159 | source = g_source_new((GSourceFuncs *)&sourcefuncs, |
160 | sizeof (struct eclient_source)); |
161 | esource = (struct eclient_source *)source; |
162 | esource->pollfd.fd = -1; |
163 | esource->client = disorder_eclient_new(>kclient_callbacks, source); |
164 | g_source_attach(source, 0); |
165 | return esource->client; |
166 | } |
167 | |
168 | /* |
169 | Local Variables: |
170 | c-basic-offset:2 |
171 | comment-column:40 |
172 | fill-column:79 |
173 | indent-tabs-mode:nil |
174 | End: |
175 | */ |