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Implement.

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Mon Aug 27 14:55:27 2001  Owen Taylor  <otaylor@redhat.com>

	* gsourceclosure.[ch] (g_source_set_closure): Implement.

	* gsourceclosure.[ch]: Add GType's for GIOChannel, GIOCondition.

Mon Aug 27 14:56:12 2001  Owen Taylor  <otaylor@redhat.com>

	* glib/gmain.h: Add closure_marshal/closure_callback
	fields to GSourceFuncs for use by g_source_set_closure().

	* glib/gmain.c glib/giounix.c glib/giowin32.c
	  glib/gmain.h: Export the SourceFuncs vtables so GObject
	can use them to figure out closure callbacks/marshallers
	for the default source types.
This commit is contained in:
Owen Taylor
2001-09-03 22:13:16 +00:00
committed by Owen Taylor
parent b4c3107c7a
commit 0038581ed4
7 changed files with 468 additions and 1 deletions
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201
gobject/gsourceclosure.c Normal file
View File

@@ -0,0 +1,201 @@
/* GObject - GLib Type, Object, Parameter and Signal Library
* Copyright (C) 2001 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "gsourceclosure.h"
#include "gboxed.h"
#include "genums.h"
#include "gmarshal.h"
#include "gvalue.h"
#include "gvaluetypes.h"
GType
g_io_channel_get_type (void)
{
static GType our_type = 0;
if (our_type == 0)
our_type = g_boxed_type_register_static ("GIOChannel",
NULL,
(GBoxedCopyFunc) g_io_channel_ref,
(GBoxedFreeFunc) g_io_channel_unref,
FALSE);
return our_type;
}
GType
g_io_condition_get_type (void)
{
static GType etype = 0;
if (etype == 0)
{
static const GFlagsValue values[] = {
{ G_IO_IN, "G_IO_IN", "in" },
{ G_IO_OUT, "G_IO_OUT", "out" },
{ G_IO_PRI, "G_IO_PRI", "pri" },
{ G_IO_ERR, "G_IO_ERR", "err" },
{ G_IO_HUP, "G_IO_HUP", "hup" },
{ G_IO_NVAL, "G_IO_NVAL", "nval" },
{ 0, NULL, NULL }
};
etype = g_flags_register_static ("GIOCondition", values);
}
return etype;
}
/* We need to hand-write this marshaler, since it doesn't have an
* instance object.
*/
static void
source_closure_marshal_BOOLEAN__VOID (GClosure *closure,
GValue *return_value,
guint n_param_values,
const GValue *param_values,
gpointer invocation_hint,
gpointer marshal_data)
{
GSourceFunc callback;
GCClosure *cc = (GCClosure*) closure;
gboolean v_return;
g_return_if_fail (return_value != NULL);
g_return_if_fail (n_param_values == 0);
callback = (GSourceFunc) (marshal_data ? marshal_data : cc->callback);
v_return = callback (closure->data);
g_value_set_boolean (return_value, v_return);
}
static gboolean
io_watch_closure_callback (GIOChannel *channel,
GIOCondition condition,
gpointer data)
{
GClosure *closure = data;
GValue params[2] = { { 0, }, { 0, } };
GValue result_value = { 0, };
gboolean result;
g_value_init (&result_value, G_TYPE_BOOLEAN);
g_value_init (&params[0], G_TYPE_IO_CHANNEL);
g_value_set_boxed (&params[0], channel);
g_value_init (&params[1], G_TYPE_IO_CONDITION);
g_value_set_flags (&params[1], condition);
g_closure_invoke (closure, &result_value, 2, params, NULL);
result = g_value_get_boolean (&result_value);
g_value_unset (&result_value);
g_value_unset (&params[0]);
g_value_unset (&params[1]);
return result;
}
static gboolean
source_closure_callback (gpointer data)
{
GClosure *closure = data;
GValue result_value = { 0, };
gboolean result;
g_value_init (&result_value, G_TYPE_BOOLEAN);
g_closure_invoke (closure, &result_value, 0, NULL, NULL);
result = g_value_get_boolean (&result_value);
g_value_unset (&result_value);
return result;
}
static void
closure_callback_get (gpointer cb_data,
GSource *source,
GSourceFunc *func,
gpointer *data)
{
GSourceFunc closure_callback = source->source_funcs->closure_callback;
if (!closure_callback)
{
if (source->source_funcs == &g_io_watch_funcs)
closure_callback = (GSourceFunc)io_watch_closure_callback;
else if (source->source_funcs == &g_timeout_funcs ||
source->source_funcs == &g_idle_funcs)
closure_callback = source_closure_callback;
}
*func = closure_callback;
*data = cb_data;
}
GSourceCallbackFuncs closure_callback_funcs = {
(void (*) (gpointer)) g_closure_ref,
(void (*) (gpointer)) g_closure_unref,
closure_callback_get
};
/**
* g_source_set_callback:
* @source: the source
* @func: a #GClosure
*
* Set the callback for a source as a #GClosure.
*
* If the source is not one of the standard GLib types, the closure_callback
* and closure_marshal fields of the GSourceFuncs structure must have been
* filled in with pointers to appropriate functions.
**/
void
g_source_set_closure (GSource *source,
GClosure *closure)
{
if (!source->source_funcs->closure_callback &&
source->source_funcs != &g_io_watch_funcs &&
source->source_funcs != &g_timeout_funcs &&
source->source_funcs != &g_idle_funcs)
{
g_critical (G_STRLOC "closure can not be set on closure without GSourceFuncs::closure_callback\n");
return;
}
g_closure_ref (closure);
g_closure_sink (closure);
g_source_set_callback_indirect (source, closure, &closure_callback_funcs);
if (G_CLOSURE_NEEDS_MARSHAL (closure))
{
GClosureMarshal marshal = (GClosureMarshal)source->source_funcs->closure_marshal;
if (!marshal)
{
if (source->source_funcs == &g_idle_funcs ||
source->source_funcs == &g_timeout_funcs)
marshal = source_closure_marshal_BOOLEAN__VOID;
else if (source->source_funcs == &g_io_watch_funcs)
marshal = g_cclosure_marshal_BOOLEAN__FLAGS;
}
if (marshal)
g_closure_set_marshal (closure, marshal);
}
}