1 /* GObject - GLib Type, Object, Parameter and Signal Library 2 * Copyright (C) 2001 Red Hat, Inc. 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General 15 * Public License along with this library; if not, write to the 16 * Free Software Foundation, Inc., 59 Temple Place, Suite 330, 17 * Boston, MA 02111-1307, USA. 18 */ 19 20 #include "config.h" 21 22 #include "gsourceclosure.h" 23 #include "gboxed.h" 24 #include "genums.h" 25 #include "gmarshal.h" 26 #include "gvalue.h" 27 #include "gvaluetypes.h" 28 #include "gobjectalias.h" 29 30 31 GType 32 g_io_channel_get_type (void) 33 { 34 static GType our_type = 0; 35 36 if (our_type == 0) 37 our_type = g_boxed_type_register_static ("GIOChannel", 38 (GBoxedCopyFunc) g_io_channel_ref, 39 (GBoxedFreeFunc) g_io_channel_unref); 40 41 return our_type; 42 } 43 44 GType 45 g_io_condition_get_type (void) 46 { 47 static GType etype = 0; 48 if (etype == 0) 49 { 50 static const GFlagsValue values[] = { 51 { G_IO_IN, "G_IO_IN", "in" }, 52 { G_IO_OUT, "G_IO_OUT", "out" }, 53 { G_IO_PRI, "G_IO_PRI", "pri" }, 54 { G_IO_ERR, "G_IO_ERR", "err" }, 55 { G_IO_HUP, "G_IO_HUP", "hup" }, 56 { G_IO_NVAL, "G_IO_NVAL", "nval" }, 57 { 0, NULL, NULL } 58 }; 59 etype = g_flags_register_static ("GIOCondition", values); 60 } 61 return etype; 62 } 63 64 /* We need to hand-write this marshaler, since it doesn't have an 65 * instance object. 66 */ 67 static void 68 source_closure_marshal_BOOLEAN__VOID (GClosure *closure, 69 GValue *return_value, 70 guint n_param_values, 71 const GValue *param_values, 72 gpointer invocation_hint, 73 gpointer marshal_data) 74 { 75 GSourceFunc callback; 76 GCClosure *cc = (GCClosure*) closure; 77 gboolean v_return; 78 79 g_return_if_fail (return_value != NULL); 80 g_return_if_fail (n_param_values == 0); 81 82 callback = (GSourceFunc) (marshal_data ? marshal_data : cc->callback); 83 84 v_return = callback (closure->data); 85 86 g_value_set_boolean (return_value, v_return); 87 } 88 89 static gboolean 90 io_watch_closure_callback (GIOChannel *channel, 91 GIOCondition condition, 92 gpointer data) 93 { 94 GClosure *closure = data; 95 96 GValue params[2] = { { 0, }, { 0, } }; 97 GValue result_value = { 0, }; 98 gboolean result; 99 100 g_value_init (&result_value, G_TYPE_BOOLEAN); 101 g_value_init (¶ms[0], G_TYPE_IO_CHANNEL); 102 g_value_set_boxed (¶ms[0], channel); 103 104 g_value_init (¶ms[1], G_TYPE_IO_CONDITION); 105 g_value_set_flags (¶ms[1], condition); 106 107 g_closure_invoke (closure, &result_value, 2, params, NULL); 108 109 result = g_value_get_boolean (&result_value); 110 g_value_unset (&result_value); 111 g_value_unset (¶ms[0]); 112 g_value_unset (¶ms[1]); 113 114 return result; 115 } 116 117 static gboolean 118 source_closure_callback (gpointer data) 119 { 120 GClosure *closure = data; 121 GValue result_value = { 0, }; 122 gboolean result; 123 124 g_value_init (&result_value, G_TYPE_BOOLEAN); 125 126 g_closure_invoke (closure, &result_value, 0, NULL, NULL); 127 128 result = g_value_get_boolean (&result_value); 129 g_value_unset (&result_value); 130 131 return result; 132 } 133 134 static void 135 closure_callback_get (gpointer cb_data, 136 GSource *source, 137 GSourceFunc *func, 138 gpointer *data) 139 { 140 GSourceFunc closure_callback = source->source_funcs->closure_callback; 141 142 if (!closure_callback) 143 { 144 if (source->source_funcs == &g_io_watch_funcs) 145 closure_callback = (GSourceFunc)io_watch_closure_callback; 146 else if (source->source_funcs == &g_timeout_funcs || 147 source->source_funcs == &g_idle_funcs) 148 closure_callback = source_closure_callback; 149 } 150 151 *func = closure_callback; 152 *data = cb_data; 153 } 154 155 static GSourceCallbackFuncs closure_callback_funcs = { 156 (void (*) (gpointer)) g_closure_ref, 157 (void (*) (gpointer)) g_closure_unref, 158 closure_callback_get 159 }; 160 161 /** 162 * g_source_set_closure: 163 * @source: the source 164 * @closure: a #GClosure 165 * 166 * Set the callback for a source as a #GClosure. 167 * 168 * If the source is not one of the standard GLib types, the @closure_callback 169 * and @closure_marshal fields of the #GSourceFuncs structure must have been 170 * filled in with pointers to appropriate functions. 171 */ 172 void 173 g_source_set_closure (GSource *source, 174 GClosure *closure) 175 { 176 g_return_if_fail (source != NULL); 177 g_return_if_fail (closure != NULL); 178 179 if (!source->source_funcs->closure_callback && 180 source->source_funcs != &g_io_watch_funcs && 181 source->source_funcs != &g_timeout_funcs && 182 source->source_funcs != &g_idle_funcs) 183 { 184 g_critical (G_STRLOC "closure can not be set on closure without GSourceFuncs::closure_callback\n"); 185 return; 186 } 187 188 g_closure_ref (closure); 189 g_closure_sink (closure); 190 g_source_set_callback_indirect (source, closure, &closure_callback_funcs); 191 192 if (G_CLOSURE_NEEDS_MARSHAL (closure)) 193 { 194 GClosureMarshal marshal = (GClosureMarshal)source->source_funcs->closure_marshal; 195 if (!marshal) 196 { 197 if (source->source_funcs == &g_idle_funcs || 198 source->source_funcs == &g_timeout_funcs) 199 marshal = source_closure_marshal_BOOLEAN__VOID; 200 else if (source->source_funcs == &g_io_watch_funcs) 201 marshal = g_cclosure_marshal_BOOLEAN__FLAGS; 202 } 203 if (marshal) 204 g_closure_set_marshal (closure, marshal); 205 } 206 } 207 208 #define __G_SOURCECLOSURE_C__ 209 #include "gobjectaliasdef.c" 210
