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gtk2/gtk/gtksignal.c
Tim Janik a3c7dca8cf pass only the signal_id to this function. it needs to relookup the signal 
Wed Jul 15 14:20:10 1998  Tim Janik  <timj@gtk.org>

        * gtk/gtksignal.c (gtk_signal_real_emit): pass only the signal_id
        to this function. it needs to relookup the signal multiple times.
        this fixes spurious segfaults that could show up with signal intensive
        code, when classes are created during a pending emission (which is
        normal case).
1998-07-15 12:25:43 +00:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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 <stdarg.h>
#include <string.h>
#include <stdio.h>
#include "gtksignal.h"
#include "gtkargcollector.c"
#define SIGNAL_BLOCK_SIZE (100)
#define HANDLER_BLOCK_SIZE (200)
#define EMISSION_BLOCK_SIZE (100)
#define DISCONNECT_INFO_BLOCK_SIZE (64)
#define MAX_SIGNAL_PARAMS (31)
enum
{
EMISSION_CONTINUE,
EMISSION_RESTART,
EMISSION_DONE
};
#define GTK_RUN_TYPE(x) ((x) & GTK_RUN_MASK)
typedef struct _GtkSignal GtkSignal;
typedef struct _GtkSignalHash GtkSignalHash;
typedef struct _GtkHandler GtkHandler;
typedef struct _GtkHandlerInfo GtkHandlerInfo;
typedef struct _GtkEmission GtkEmission;
typedef union _GtkEmissionAllocator GtkEmissionAllocator;
typedef struct _GtkDisconnectInfo GtkDisconnectInfo;
typedef void (*GtkSignalMarshaller0) (GtkObject *object,
gpointer data);
struct _GtkSignal
{
guint signal_id;
GtkType object_type;
gchar *name;
guint function_offset;
GtkSignalRunType signal_flags;
GtkSignalMarshaller marshaller;
GtkType return_val;
GtkType *params;
guint nparams;
};
struct _GtkSignalHash
{
GtkType object_type;
GQuark quark;
guint signal_id;
};
struct _GtkHandler
{
guint id;
guint blocked : 20;
guint object_signal : 1;
guint after : 1;
guint no_marshal : 1;
guint16 ref_count;
guint16 signal_id;
GtkSignalFunc func;
gpointer func_data;
GtkSignalDestroy destroy_func;
GtkHandler *prev;
GtkHandler *next;
};
struct _GtkHandlerInfo
{
GtkObject *object;
GtkSignalMarshaller marshaller;
GtkArg *params;
GtkType *param_types;
GtkType return_val;
GtkSignalRunType signal_flags;
guint nparams;
guint signal_id;
};
struct _GtkEmission
{
GtkObject *object;
guint signal_id;
};
union _GtkEmissionAllocator
{
GtkEmissionAllocator *next;
GtkEmission emission;
};
struct _GtkDisconnectInfo
{
GtkObject *object1;
guint disconnect_handler1;
guint signal_handler;
GtkObject *object2;
guint disconnect_handler2;
};
static guint gtk_signal_hash (gconstpointer h);
static gint gtk_signal_compare (gconstpointer h1,
gconstpointer h2);
static GtkHandler* gtk_signal_handler_new (void);
static void gtk_signal_handler_ref (GtkHandler *handler);
static void gtk_signal_handler_unref (GtkHandler *handler,
GtkObject *object);
static void gtk_signal_handler_insert (GtkObject *object,
GtkHandler *handler);
static void gtk_signal_real_emit (GtkObject *object,
guint signal_id,
GtkArg *params);
static GtkHandler* gtk_signal_get_handlers (GtkObject *object,
guint signal_type);
static guint gtk_signal_connect_by_type (GtkObject *object,
guint signal_id,
GtkSignalFunc func,
gpointer func_data,
GtkSignalDestroy destroy_func,
gint object_signal,
gint after,
gint no_marshal);
static guint gtk_alive_disconnecter (GtkDisconnectInfo *info);
static GtkEmission* gtk_emission_new (void);
static void gtk_emission_add (GList **emissions,
GtkObject *object,
guint signal_type);
static void gtk_emission_remove (GList **emissions,
GtkObject *object,
guint signal_type);
static gint gtk_emission_check (GList *emissions,
GtkObject *object,
guint signal_type);
static gint gtk_handlers_run (GtkHandler *handlers,
GtkHandlerInfo *info,
gint after);
static gboolean gtk_signal_collect_params (GtkArg *params,
guint nparams,
GtkType *param_types,
GtkType return_type,
va_list var_args);
#define LOOKUP_SIGNAL_ID(signal_id) ( \
signal_id > 0 && signal_id < gtk_n_signals ? \
(GtkSignal*) gtk_signals + signal_id : \
(GtkSignal*) 0 \
)
static GtkSignalMarshal global_marshaller = NULL;
static GtkSignalDestroy global_destroy_notify = NULL;
static guint gtk_handler_id = 1;
static guint handler_quark = 0;
static GHashTable *gtk_signal_hash_table = NULL;
static GtkSignal *gtk_signals = NULL;
static guint gtk_n_signals = 0;
static GMemChunk *gtk_signal_hash_mem_chunk = NULL;
static GMemChunk *gtk_disconnect_info_mem_chunk = NULL;
static GtkHandler *gtk_handler_free_list = NULL;
static GtkEmissionAllocator *gtk_emission_free_list = NULL;
static GList *current_emissions = NULL;
static GList *stop_emissions = NULL;
static GList *restart_emissions = NULL;
static GtkSignal*
gtk_signal_next_and_invalidate (void)
{
static guint gtk_n_free_signals = 0;
register GtkSignal *signal;
register guint new_signal_id;
/* don't keep *any* GtkSignal pointers across invokation of this function!!!
*/
if (gtk_n_free_signals == 0)
{
register guint i;
register guint size;
/* nearest pow
*/
size = gtk_n_signals + SIGNAL_BLOCK_SIZE;
size *= sizeof (GtkSignal);
i = 1;
while (i < size)
i <<= 1;
size = i;
gtk_signals = g_realloc (gtk_signals, size);
gtk_n_free_signals = size / sizeof (GtkSignal) - gtk_n_signals;
memset (gtk_signals + gtk_n_signals, 0, gtk_n_free_signals * sizeof (GtkSignal));
}
new_signal_id = gtk_n_signals++;
gtk_n_free_signals--;
signal = LOOKUP_SIGNAL_ID (new_signal_id);
if (signal)
signal->signal_id = new_signal_id;
return signal;
}
void
gtk_signal_init (void)
{
if (!handler_quark)
{
GtkSignal *zero;
zero = gtk_signal_next_and_invalidate ();
g_assert (zero == NULL);
handler_quark = g_quark_from_static_string ("gtk-signal-handlers");
gtk_signal_hash_mem_chunk =
g_mem_chunk_new ("GtkSignalHash mem chunk",
sizeof (GtkSignalHash),
sizeof (GtkSignalHash) * SIGNAL_BLOCK_SIZE,
G_ALLOC_ONLY);
gtk_disconnect_info_mem_chunk =
g_mem_chunk_new ("GtkDisconnectInfo mem chunk",
sizeof (GtkDisconnectInfo),
sizeof (GtkDisconnectInfo) * DISCONNECT_INFO_BLOCK_SIZE,
G_ALLOC_AND_FREE);
gtk_handler_free_list = NULL;
gtk_emission_free_list = NULL;
gtk_signal_hash_table = g_hash_table_new (gtk_signal_hash,
gtk_signal_compare);
}
}
guint
gtk_signal_newv (const gchar *r_name,
GtkSignalRunType signal_flags,
GtkType object_type,
guint function_offset,
GtkSignalMarshaller marshaller,
GtkType return_val,
guint nparams,
GtkType *params)
{
GtkSignal *signal;
GtkSignalHash *hash;
GQuark quark;
guint i;
gchar *name;
g_return_val_if_fail (r_name != NULL, 0);
g_return_val_if_fail (marshaller != NULL, 0);
g_return_val_if_fail (nparams < MAX_SIGNAL_PARAMS, 0);
if (nparams)
g_return_val_if_fail (params != NULL, 0);
if (!handler_quark)
gtk_signal_init ();
name = g_strdup (r_name);
g_strdelimit (name, NULL, '_');
quark = gtk_signal_lookup (name, object_type);
if (quark)
{
g_warning ("gtk_signal_newv(): signal \"%s\" already exists in the `%s' class ancestry\n",
r_name,
gtk_type_name (object_type));
g_free (name);
return 0;
}
if (return_val != GTK_TYPE_NONE &&
(signal_flags & GTK_RUN_BOTH) == GTK_RUN_FIRST)
{
g_warning ("gtk_signal_newv(): signal \"%s\" with return value `%s' excludes GTK_RUN_LAST",
name, gtk_type_name (return_val));
g_free (name);
return 0;
}
signal = gtk_signal_next_and_invalidate ();
/* signal->signal_id already set */
signal->object_type = object_type;
signal->name = name;
signal->function_offset = function_offset;
signal->signal_flags = signal_flags;
signal->marshaller = marshaller;
signal->return_val = return_val;
signal->nparams = nparams;
if (nparams > 0)
{
signal->params = g_new (GtkType, nparams);
for (i = 0; i < nparams; i++)
signal->params[i] = params[i];
}
else
signal->params = NULL;
/* insert "signal_name" into hash table
*/
hash = g_chunk_new (GtkSignalHash, gtk_signal_hash_mem_chunk);
hash->object_type = object_type;
hash->quark = g_quark_from_string (signal->name);
hash->signal_id = signal->signal_id;
g_hash_table_insert (gtk_signal_hash_table, hash, GUINT_TO_POINTER (hash->signal_id));
/* insert "signal-name" into hash table
*/
g_strdelimit (signal->name, NULL, '-');
quark = g_quark_from_static_string (signal->name);
if (quark != hash->quark)
{
hash = g_chunk_new (GtkSignalHash, gtk_signal_hash_mem_chunk);
hash->object_type = object_type;
hash->quark = quark;
hash->signal_id = signal->signal_id;
g_hash_table_insert (gtk_signal_hash_table, hash, GUINT_TO_POINTER (hash->signal_id));
}
return signal->signal_id;
}
guint
gtk_signal_new (const gchar *name,
GtkSignalRunType signal_flags,
GtkType object_type,
guint function_offset,
GtkSignalMarshaller marshaller,
GtkType return_val,
guint nparams,
...)
{
GtkType *params;
guint i;
va_list args;
guint signal_id;
g_return_val_if_fail (nparams < MAX_SIGNAL_PARAMS, 0);
if (nparams > 0)
{
params = g_new (GtkType, nparams);
va_start (args, nparams);
for (i = 0; i < nparams; i++)
params[i] = va_arg (args, GtkType);
va_end (args);
}
else
params = NULL;
signal_id = gtk_signal_newv (name,
signal_flags,
object_type,
function_offset,
marshaller,
return_val,
nparams,
params);
g_free (params);
return signal_id;
}
guint
gtk_signal_lookup (const gchar *name,
GtkType object_type)
{
GtkSignalHash hash;
g_return_val_if_fail (name != NULL, 0);
g_return_val_if_fail (gtk_type_is_a (object_type, GTK_TYPE_OBJECT), 0);
hash.quark = g_quark_try_string (name);
if (hash.quark)
{
while (object_type)
{
guint signal_id;
hash.object_type = object_type;
signal_id = GPOINTER_TO_UINT (g_hash_table_lookup (gtk_signal_hash_table, &hash));
if (signal_id)
return signal_id;
object_type = gtk_type_parent (object_type);
}
}
return 0;
}
GtkSignalQuery*
gtk_signal_query (guint signal_id)
{
GtkSignalQuery *query;
GtkSignal *signal;
g_return_val_if_fail (signal_id >= 1, NULL);
signal = LOOKUP_SIGNAL_ID (signal_id);
if (signal)
{
query = g_new (GtkSignalQuery, 1);
query->object_type = signal->object_type;
query->signal_id = signal_id;
query->signal_name = signal->name;
query->is_user_signal = signal->function_offset == 0;
query->signal_flags = signal->signal_flags;
query->return_val = signal->return_val;
query->nparams = signal->nparams;
query->params = signal->params;
}
else
query = NULL;
return query;
}
gchar*
gtk_signal_name (guint signal_id)
{
GtkSignal *signal;
g_return_val_if_fail (signal_id >= 1, NULL);
signal = LOOKUP_SIGNAL_ID (signal_id);
if (signal)
return signal->name;
return NULL;
}
void
gtk_signal_emitv (GtkObject *object,
guint signal_id,
GtkArg *params)
{
GtkSignal *signal;
g_return_if_fail (object != NULL);
g_return_if_fail (signal_id >= 1);
signal = LOOKUP_SIGNAL_ID (signal_id);
g_return_if_fail (signal != NULL);
g_return_if_fail (gtk_type_is_a (GTK_OBJECT_TYPE (object), signal->object_type));
if (signal->nparams > 0)
g_return_if_fail (params != NULL);
gtk_signal_real_emit (object, signal_id, params);
}
void
gtk_signal_emit (GtkObject *object,
guint signal_id,
...)
{
GtkSignal *signal;
va_list args;
GtkArg params[MAX_SIGNAL_PARAMS + 1];
gboolean abort;
g_return_if_fail (object != NULL);
g_return_if_fail (signal_id >= 1);
signal = LOOKUP_SIGNAL_ID (signal_id);
g_return_if_fail (signal != NULL);
g_return_if_fail (gtk_type_is_a (GTK_OBJECT_TYPE (object), signal->object_type));
va_start (args, signal_id);
abort = gtk_signal_collect_params (params,
signal->nparams,
signal->params,
signal->return_val,
args);
va_end (args);
if (!abort)
gtk_signal_real_emit (object, signal_id, params);
}
void
gtk_signal_emitv_by_name (GtkObject *object,
const gchar *name,
GtkArg *params)
{
guint signal_id;
g_return_if_fail (object != NULL);
g_return_if_fail (name != NULL);
g_return_if_fail (params != NULL);
signal_id = gtk_signal_lookup (name, GTK_OBJECT_TYPE (object));
if (signal_id >= 1)
{
GtkSignal *signal;
signal = LOOKUP_SIGNAL_ID (signal_id);
g_return_if_fail (signal != NULL);
g_return_if_fail (gtk_type_is_a (GTK_OBJECT_TYPE (object), signal->object_type));
gtk_signal_real_emit (object, signal_id, params);
}
else
{
g_warning ("gtk_signal_emitv_by_name(): could not find signal \"%s\" in the `%s' class ancestry",
name,
gtk_type_name (GTK_OBJECT_TYPE (object)));
}
}
void
gtk_signal_emit_by_name (GtkObject *object,
const gchar *name,
...)
{
guint signal_id;
g_return_if_fail (object != NULL);
g_return_if_fail (name != NULL);
signal_id = gtk_signal_lookup (name, GTK_OBJECT_TYPE (object));
if (signal_id >= 1)
{
GtkSignal *signal;
GtkArg params[MAX_SIGNAL_PARAMS + 1];
va_list args;
gboolean abort;
signal = LOOKUP_SIGNAL_ID (signal_id);
g_return_if_fail (signal != NULL);
g_return_if_fail (gtk_type_is_a (GTK_OBJECT_TYPE (object), signal->object_type));
va_start (args, name);
abort = gtk_signal_collect_params (params,
signal->nparams,
signal->params,
signal->return_val,
args);
va_end (args);
if (!abort)
gtk_signal_real_emit (object, signal_id, params);
}
else
{
g_warning ("gtk_signal_emit_by_name(): could not find signal \"%s\" in the `%s' class ancestry",
name,
gtk_type_name (GTK_OBJECT_TYPE (object)));
}
}
void
gtk_signal_emit_stop (GtkObject *object,
guint signal_id)
{
g_return_if_fail (object != NULL);
g_return_if_fail (signal_id >= 1);
if (gtk_emission_check (current_emissions, object, signal_id))
gtk_emission_add (&stop_emissions, object, signal_id);
else
g_warning ("gtk_signal_emit_stop(): no current emission (%u) for object `%s'",
signal_id,
gtk_type_name (GTK_OBJECT_TYPE (object)));
}
void
gtk_signal_emit_stop_by_name (GtkObject *object,
const gchar *name)
{
guint signal_id;
g_return_if_fail (object != NULL);
g_return_if_fail (name != NULL);
signal_id = gtk_signal_lookup (name, GTK_OBJECT_TYPE (object));
if (signal_id)
gtk_signal_emit_stop (object, signal_id);
else
g_warning ("gtk_signal_emit_stop_by_name(): could not find signal \"%s\" in the `%s' class ancestry",
name,
gtk_type_name (GTK_OBJECT_TYPE (object)));
}
guint
gtk_signal_n_emissions (GtkObject *object,
guint signal_id)
{
GList *list;
guint n;
g_return_val_if_fail (object != NULL, 0);
g_return_val_if_fail (GTK_IS_OBJECT (object), 0);
n = 0;
for (list = current_emissions; list; list = list->next)
{
GtkEmission *emission;
emission = list->data;
if ((emission->object == object) &&
(emission->signal_id == signal_id))
n++;
}
return n;
}
guint
gtk_signal_n_emissions_by_name (GtkObject *object,
const gchar *name)
{
guint signal_id;
guint n;
g_return_val_if_fail (object != NULL, 0);
g_return_val_if_fail (GTK_IS_OBJECT (object), 0);
g_return_val_if_fail (name != NULL, 0);
signal_id = gtk_signal_lookup (name, GTK_OBJECT_TYPE (object));
if (signal_id)
n = gtk_signal_n_emissions (object, signal_id);
else
{
g_warning ("gtk_signal_n_emissions_by_name(): could not find signal \"%s\" in the `%s' class ancestry",
name,
gtk_type_name (GTK_OBJECT_TYPE (object)));
n = 0;
}
return n;
}
guint
gtk_signal_connect (GtkObject *object,
const gchar *name,
GtkSignalFunc func,
gpointer func_data)
{
guint signal_id;
g_return_val_if_fail (object != NULL, 0);
g_return_val_if_fail (GTK_IS_OBJECT (object), 0);
signal_id = gtk_signal_lookup (name, GTK_OBJECT_TYPE (object));
if (!signal_id)
{
g_warning ("gtk_signal_connect(): could not find signal \"%s\" in the `%s' class ancestry",
name,
gtk_type_name (GTK_OBJECT_TYPE (object)));
return 0;
}
return gtk_signal_connect_by_type (object, signal_id,
func, func_data, NULL,
FALSE, FALSE, FALSE);
}
guint
gtk_signal_connect_after (GtkObject *object,
const gchar *name,
GtkSignalFunc func,
gpointer func_data)
{
guint signal_id;
g_return_val_if_fail (object != NULL, 0);
signal_id = gtk_signal_lookup (name, GTK_OBJECT_TYPE (object));
if (!signal_id)
{
g_warning ("gtk_signal_connect_after(): could not find signal \"%s\" in the `%s' class ancestry",
name,
gtk_type_name (GTK_OBJECT_TYPE (object)));
return 0;
}
return gtk_signal_connect_by_type (object, signal_id,
func, func_data, NULL,
FALSE, TRUE, FALSE);
}
guint
gtk_signal_connect_full (GtkObject *object,
const gchar *name,
GtkSignalFunc func,
GtkCallbackMarshal marshal,
gpointer func_data,
GtkDestroyNotify destroy_func,
gint object_signal,
gint after)
{
guint signal_id;
g_return_val_if_fail (object != NULL, 0);
signal_id = gtk_signal_lookup (name, GTK_OBJECT_TYPE (object));
if (!signal_id)
{
g_warning ("gtk_signal_connect_full(): could not find signal \"%s\" in the `%s' class ancestry",
name,
gtk_type_name (GTK_OBJECT_TYPE (object)));
return 0;
}
if (marshal)
return gtk_signal_connect_by_type (object, signal_id, (GtkSignalFunc) marshal,
func_data, destroy_func,
object_signal, after, TRUE);
else
return gtk_signal_connect_by_type (object, signal_id, func,
func_data, destroy_func,
object_signal, after, FALSE);
}
guint
gtk_signal_connect_interp (GtkObject *object,
const gchar *name,
GtkCallbackMarshal func,
gpointer func_data,
GtkDestroyNotify destroy_func,
gint after)
{
return gtk_signal_connect_full (object, name, NULL, func,
func_data, destroy_func, FALSE, after);
}
guint
gtk_signal_connect_object (GtkObject *object,
const gchar *name,
GtkSignalFunc func,
GtkObject *slot_object)
{
guint signal_id;
g_return_val_if_fail (object != NULL, 0);
/* slot_object needs to be treated as ordinary pointer
*/
signal_id = gtk_signal_lookup (name, GTK_OBJECT_TYPE (object));
if (!signal_id)
{
g_warning ("gtk_signal_connect_object(): could not find signal \"%s\" in the `%s' class ancestry",
name,
gtk_type_name (GTK_OBJECT_TYPE (object)));
return 0;
}
return gtk_signal_connect_by_type (object, signal_id,
func, slot_object, NULL,
TRUE, FALSE, FALSE);
}
guint
gtk_signal_connect_object_after (GtkObject *object,
const gchar *name,
GtkSignalFunc func,
GtkObject *slot_object)
{
guint signal_id;
g_return_val_if_fail (object != NULL, 0);
signal_id = gtk_signal_lookup (name, GTK_OBJECT_TYPE (object));
if (!signal_id)
{
g_warning ("gtk_signal_connect_object_after(): could not find signal \"%s\" in the `%s' class ancestry",
name,
gtk_type_name (GTK_OBJECT_TYPE (object)));
return 0;
}
return gtk_signal_connect_by_type (object, signal_id,
func, slot_object, NULL,
TRUE, TRUE, FALSE);
}
void
gtk_signal_connect_while_alive (GtkObject *object,
const gchar *signal,
GtkSignalFunc func,
gpointer func_data,
GtkObject *alive_object)
{
GtkDisconnectInfo *info;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
g_return_if_fail (signal != NULL);
g_return_if_fail (func != NULL);
g_return_if_fail (alive_object != NULL);
g_return_if_fail (GTK_IS_OBJECT (alive_object));
info = g_chunk_new (GtkDisconnectInfo, gtk_disconnect_info_mem_chunk);
info->object1 = object;
info->object2 = alive_object;
info->signal_handler = gtk_signal_connect (object, signal, func, func_data);
info->disconnect_handler1 =
gtk_signal_connect_object (info->object1,
"destroy",
GTK_SIGNAL_FUNC (gtk_alive_disconnecter),
(GtkObject*) info);
info->disconnect_handler2 =
gtk_signal_connect_object (info->object2,
"destroy",
GTK_SIGNAL_FUNC (gtk_alive_disconnecter),
(GtkObject*) info);
}
void
gtk_signal_connect_object_while_alive (GtkObject *object,
const gchar *signal,
GtkSignalFunc func,
GtkObject *alive_object)
{
GtkDisconnectInfo *info;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
g_return_if_fail (signal != NULL);
g_return_if_fail (func != NULL);
g_return_if_fail (alive_object != NULL);
g_return_if_fail (GTK_IS_OBJECT (alive_object));
info = g_chunk_new (GtkDisconnectInfo, gtk_disconnect_info_mem_chunk);
info->object1 = object;
info->object2 = alive_object;
info->signal_handler = gtk_signal_connect_object (object, signal, func, alive_object);
info->disconnect_handler1 =
gtk_signal_connect_object (info->object1,
"destroy",
GTK_SIGNAL_FUNC (gtk_alive_disconnecter),
(GtkObject*) info);
info->disconnect_handler2 =
gtk_signal_connect_object (info->object2,
"destroy",
GTK_SIGNAL_FUNC (gtk_alive_disconnecter),
(GtkObject*) info);
}
void
gtk_signal_disconnect (GtkObject *object,
guint handler_id)
{
GtkHandler *handler;
g_return_if_fail (object != NULL);
g_return_if_fail (handler_id > 0);
handler = gtk_object_get_data_by_id (object, handler_quark);
while (handler)
{
if (handler->id == handler_id)
{
handler->id = 0;
handler->blocked += 1;
gtk_signal_handler_unref (handler, object);
return;
}
handler = handler->next;
}
g_warning ("gtk_signal_disconnect(): could not find handler (%u)", handler_id);
}
void
gtk_signal_disconnect_by_func (GtkObject *object,
GtkSignalFunc func,
gpointer data)
{
GtkHandler *handler;
gint found_one;
g_return_if_fail (object != NULL);
g_return_if_fail (func != NULL);
found_one = FALSE;
handler = gtk_object_get_data_by_id (object, handler_quark);
while (handler)
{
GtkHandler *handler_next;
handler_next = handler->next;
if ((handler->id > 0) &&
(handler->func == func) &&
(handler->func_data == data))
{
found_one = TRUE;
handler->id = 0;
handler->blocked += 1;
gtk_signal_handler_unref (handler, object);
}
handler = handler_next;
}
if (!found_one)
g_warning ("gtk_signal_disconnect_by_func(): could not find handler (0x%0lX) containing data (0x%0lX)", (long) func, (long) data);
}
void
gtk_signal_disconnect_by_data (GtkObject *object,
gpointer data)
{
GtkHandler *handler;
gint found_one;
g_return_if_fail (object != NULL);
found_one = FALSE;
handler = gtk_object_get_data_by_id (object, handler_quark);
while (handler)
{
GtkHandler *handler_next;
handler_next = handler->next;
if ((handler->id > 0) &&
(handler->func_data == data))
{
found_one = TRUE;
handler->id = 0;
handler->blocked += 1;
gtk_signal_handler_unref (handler, object);
}
handler = handler_next;
}
if (!found_one)
g_warning ("gtk_signal_disconnect_by_data(): could not find handler containing data (0x%0lX)", (long) data);
}
void
gtk_signal_handler_block (GtkObject *object,
guint handler_id)
{
GtkHandler *handler;
g_return_if_fail (object != NULL);
g_return_if_fail (handler_id > 0);
handler = gtk_object_get_data_by_id (object, handler_quark);
while (handler)
{
if (handler->id == handler_id)
{
handler->blocked += 1;
return;
}
handler = handler->next;
}
g_warning ("gtk_signal_handler_block(): could not find handler (%u)", handler_id);
}
void
gtk_signal_handler_block_by_func (GtkObject *object,
GtkSignalFunc func,
gpointer data)
{
GtkHandler *handler;
gint found_one;
g_return_if_fail (object != NULL);
g_return_if_fail (func != NULL);
found_one = FALSE;
handler = gtk_object_get_data_by_id (object, handler_quark);
while (handler)
{
if ((handler->id > 0) &&
(handler->func == func) &&
(handler->func_data == data))
{
found_one = TRUE;
handler->blocked += 1;
}
handler = handler->next;
}
if (!found_one)
g_warning ("gtk_signal_handler_block_by_func(): could not find handler (0x%0lX) containing data (0x%0lX)", (long) func, (long) data);
}
void
gtk_signal_handler_block_by_data (GtkObject *object,
gpointer data)
{
GtkHandler *handler;
gint found_one;
g_return_if_fail (object != NULL);
found_one = FALSE;
handler = gtk_object_get_data_by_id (object, handler_quark);
while (handler)
{
if ((handler->id > 0) &&
(handler->func_data == data))
{
found_one = TRUE;
handler->blocked += 1;
}
handler = handler->next;
}
if (!found_one)
g_warning ("gtk_signal_handler_block_by_data(): could not find handler containing data (0x%0lX)", (long) data);
}
void
gtk_signal_handler_unblock (GtkObject *object,
guint handler_id)
{
GtkHandler *handler;
g_return_if_fail (object != NULL);
g_return_if_fail (handler_id > 0);
handler = gtk_object_get_data_by_id (object, handler_quark);
while (handler)
{
if (handler->id == handler_id)
{
if (handler->blocked > 0)
handler->blocked -= 1;
else
g_warning ("gtk_signal_handler_unblock(): handler (%u) is not blocked", handler_id);
return;
}
handler = handler->next;
}
g_warning ("gtk_signal_handler_unblock(): could not find handler (%u)", handler_id);
}
void
gtk_signal_handler_unblock_by_func (GtkObject *object,
GtkSignalFunc func,
gpointer data)
{
GtkHandler *handler;
gint found_one;
g_return_if_fail (object != NULL);
g_return_if_fail (func != NULL);
found_one = FALSE;
handler = gtk_object_get_data_by_id (object, handler_quark);
while (handler)
{
if ((handler->id > 0) &&
(handler->func == func) &&
(handler->func_data == data) &&
(handler->blocked > 0))
{
handler->blocked -= 1;
found_one = TRUE;
}
handler = handler->next;
}
if (!found_one)
g_warning ("gtk_signal_handler_unblock_by_func(): could not find blocked handler (0x%0lX) containing data (0x%0lX)", (long) func, (long) data);
}
void
gtk_signal_handler_unblock_by_data (GtkObject *object,
gpointer data)
{
GtkHandler *handler;
gint found_one;
g_return_if_fail (object != NULL);
found_one = FALSE;
handler = gtk_object_get_data_by_id (object, handler_quark);
while (handler)
{
if ((handler->id > 0) &&
(handler->func_data == data) &&
(handler->blocked > 0))
{
handler->blocked -= 1;
found_one = TRUE;
}
handler = handler->next;
}
if (!found_one)
g_warning ("gtk_signal_handler_unblock_by_data(): could not find blocked handler containing data (0x%0lX)", (long) data);
}
void
gtk_signal_handlers_destroy (GtkObject *object)
{
GtkHandler *handler;
/* we make the "optimization" of destroying the first handler in the last
* place, since we don't want gtk_signal_handler_unref() to reset the objects
* handler_key data on each removal
*/
handler = gtk_object_get_data_by_id (object, handler_quark);
if (handler)
{
handler = handler->next;
while (handler)
{
GtkHandler *next;
next = handler->next;
gtk_signal_handler_unref (handler, object);
handler = next;
}
handler = gtk_object_get_data_by_id (object, handler_quark);
gtk_signal_handler_unref (handler, object);
}
}
void
gtk_signal_default_marshaller (GtkObject *object,
GtkSignalFunc func,
gpointer func_data,
GtkArg *params)
{
GtkSignalMarshaller0 rfunc;
rfunc = (GtkSignalMarshaller0) func;
(* rfunc) (object, func_data);
}
void
gtk_signal_set_funcs (GtkSignalMarshal marshal_func,
GtkSignalDestroy destroy_func)
{
global_marshaller = marshal_func;
global_destroy_notify = destroy_func;
}
static guint
gtk_signal_hash (gconstpointer h)
{
register const GtkSignalHash *hash = h;
return hash->object_type ^ hash->quark;
}
static gint
gtk_signal_compare (gconstpointer h1,
gconstpointer h2)
{
register const GtkSignalHash *hash1 = h1;
register const GtkSignalHash *hash2 = h2;
return (hash1->quark == hash2->quark &&
hash1->object_type == hash2->object_type);
}
static guint
gtk_alive_disconnecter (GtkDisconnectInfo *info)
{
g_return_val_if_fail (info != NULL, 0);
gtk_signal_disconnect (info->object1, info->disconnect_handler1);
gtk_signal_disconnect (info->object1, info->signal_handler);
gtk_signal_disconnect (info->object2, info->disconnect_handler2);
g_mem_chunk_free (gtk_disconnect_info_mem_chunk, info);
return 0;
}
static GtkHandler*
gtk_signal_handler_new (void)
{
GtkHandler *handler;
if (!gtk_handler_free_list)
{
GtkHandler *handler_block;
guint i;
handler_block = g_new0 (GtkHandler, HANDLER_BLOCK_SIZE);
for (i = 1; i < HANDLER_BLOCK_SIZE; i++)
{
(handler_block + i)->next = gtk_handler_free_list;
gtk_handler_free_list = (handler_block + i);
}
handler = handler_block;
}
else
{
handler = gtk_handler_free_list;
gtk_handler_free_list = handler->next;
}
handler->id = 0;
handler->blocked = 0;
handler->signal_id = 0;
handler->object_signal = FALSE;
handler->after = FALSE;
handler->no_marshal = FALSE;
handler->ref_count = 1;
handler->func = NULL;
handler->func_data = NULL;
handler->destroy_func = NULL;
handler->prev = NULL;
handler->next = NULL;
return handler;
}
static void
gtk_signal_handler_ref (GtkHandler *handler)
{
handler->ref_count += 1;
}
static void
gtk_signal_handler_unref (GtkHandler *handler,
GtkObject *object)
{
if (!handler->ref_count)
{
/* FIXME: i wanna get removed somewhen */
g_warning ("gtk_signal_handler_unref(): handler with ref_count==0!");
return;
}
handler->ref_count -= 1;
if (handler->ref_count == 0)
{
if (handler->destroy_func)
(* handler->destroy_func) (handler->func_data);
else if (!handler->func && global_destroy_notify)
(* global_destroy_notify) (handler->func_data);
if (handler->prev)
handler->prev->next = handler->next;
else if (handler->next)
gtk_object_set_data_by_id (object, handler_quark, handler->next);
else
{
GTK_OBJECT_UNSET_FLAGS (object, GTK_CONNECTED);
gtk_object_set_data_by_id (object, handler_quark, NULL);
}
if (handler->next)
handler->next->prev = handler->prev;
handler->next = gtk_handler_free_list;
gtk_handler_free_list = handler;
}
}
static void
gtk_signal_handler_insert (GtkObject *object,
GtkHandler *handler)
{
GtkHandler *tmp;
/* FIXME: remove */ g_assert (handler->next == NULL);
/* FIXME: remove */ g_assert (handler->prev == NULL);
tmp = gtk_object_get_data_by_id (object, handler_quark);
if (!tmp)
{
GTK_OBJECT_SET_FLAGS (object, GTK_CONNECTED);
gtk_object_set_data_by_id (object, handler_quark, handler);
}
else
while (tmp)
{
if (tmp->signal_id < handler->signal_id)
{
if (tmp->prev)
{
tmp->prev->next = handler;
handler->prev = tmp->prev;
}
else
gtk_object_set_data_by_id (object, handler_quark, handler);
tmp->prev = handler;
handler->next = tmp;
break;
}
if (!tmp->next)
{
tmp->next = handler;
handler->prev = tmp;
break;
}
tmp = tmp->next;
}
}
static GtkObject *gtk_trace_signal_object = NULL;
static void
gtk_signal_real_emit (GtkObject *object,
guint signal_id,
GtkArg *params)
{
GtkSignal *signal;
GtkHandler *handlers;
GtkHandlerInfo info;
guchar **signal_func_offset;
signal = LOOKUP_SIGNAL_ID (signal_id);
#ifdef G_ENABLE_DEBUG
if (gtk_debug_flags & GTK_DEBUG_SIGNALS ||
object == gtk_trace_signal_object)
fprintf (stdout, "trace: signal_emit(\"%s\") for %s:%p\n",
signal->name,
gtk_type_name (GTK_OBJECT_TYPE (object)),
object);
#endif /* G_ENABLE_DEBUG */
if ((signal->signal_flags & GTK_RUN_NO_RECURSE) &&
gtk_emission_check (current_emissions, object, signal_id))
{
gtk_emission_add (&restart_emissions, object, signal_id);
return;
}
gtk_object_ref (object);
gtk_emission_add (&current_emissions, object, signal_id);
emission_restart:
if (GTK_RUN_TYPE (signal->signal_flags) != GTK_RUN_LAST && signal->function_offset != 0)
{
signal_func_offset = (guchar**) ((guchar*) object->klass +
signal->function_offset);
if (*signal_func_offset)
{
(* signal->marshaller) (object, (GtkSignalFunc) *signal_func_offset,
NULL, params);
signal = LOOKUP_SIGNAL_ID (signal_id);
}
}
if (GTK_OBJECT_CONNECTED (object))
{
handlers = gtk_signal_get_handlers (object, signal_id);
if (handlers)
{
gint return_val;
info.object = object;
info.marshaller = signal->marshaller;
info.params = params;
info.param_types = signal->params;
info.return_val = signal->return_val;
info.nparams = signal->nparams;
info.signal_flags = signal->signal_flags;
info.signal_id = signal_id;
return_val = gtk_handlers_run (handlers, &info, FALSE);
signal = LOOKUP_SIGNAL_ID (signal_id);
switch (return_val)
{
case EMISSION_CONTINUE:
break;
case EMISSION_RESTART:
goto emission_restart;
case EMISSION_DONE:
goto emission_done;
}
}
else
info.object = NULL;
}
else
info.object = NULL;
if (GTK_RUN_TYPE (signal->signal_flags) != GTK_RUN_FIRST && signal->function_offset != 0)
{
signal_func_offset = (guchar**) ((guchar*) object->klass +
signal->function_offset);
if (*signal_func_offset)
{
(* signal->marshaller) (object, (GtkSignalFunc) *signal_func_offset,
NULL, params);
signal = LOOKUP_SIGNAL_ID (signal_id);
}
}
if (GTK_OBJECT_CONNECTED (object))
{
handlers = gtk_signal_get_handlers (object, signal_id);
if (handlers)
{
gint return_val;
if (!info.object)
{
info.object = object;
info.marshaller = signal->marshaller;
info.params = params;
info.param_types = signal->params;
info.return_val = signal->return_val;
info.nparams = signal->nparams;
info.signal_flags = signal->signal_flags;
info.signal_id = signal_id;
}
return_val = gtk_handlers_run (handlers, &info, TRUE);
signal = LOOKUP_SIGNAL_ID (signal_id);
switch (return_val)
{
case EMISSION_CONTINUE:
break;
case EMISSION_RESTART:
goto emission_restart;
case EMISSION_DONE:
goto emission_done;
}
}
}
emission_done:
gtk_emission_remove (&current_emissions, object, signal_id);
if (signal->signal_flags & GTK_RUN_NO_RECURSE)
gtk_emission_remove (&restart_emissions, object, signal_id);
gtk_object_unref (object);
}
static GtkHandler*
gtk_signal_get_handlers (GtkObject *object,
guint signal_id)
{
GtkHandler *handlers;
handlers = gtk_object_get_data_by_id (object, handler_quark);
while (handlers)
{
if (handlers->signal_id == signal_id)
return handlers;
handlers = handlers->next;
}
return NULL;
}
guint
gtk_signal_handler_pending (GtkObject *object,
guint signal_id,
gboolean may_be_blocked)
{
GtkHandler *handlers;
guint handler_id;
g_return_val_if_fail (object != NULL, 0);
g_return_val_if_fail (signal_id >= 1, 0);
if (GTK_OBJECT_CONNECTED (object))
handlers = gtk_signal_get_handlers (object, signal_id);
else
return 0;
handler_id = 0;
while (handlers && handlers->signal_id == signal_id)
{
if (handlers->id > 0 &&
(may_be_blocked || handlers->blocked == FALSE))
{
handler_id = handlers->id;
break;
}
handlers = handlers->next;
}
return handler_id;
}
guint
gtk_signal_handler_pending_by_func (GtkObject *object,
guint signal_id,
gboolean may_be_blocked,
GtkSignalFunc func,
gpointer data)
{
GtkHandler *handlers;
guint handler_id;
g_return_val_if_fail (object != NULL, 0);
g_return_val_if_fail (func != NULL, 0);
g_return_val_if_fail (signal_id >= 1, 0);
if (GTK_OBJECT_CONNECTED (object))
handlers = gtk_signal_get_handlers (object, signal_id);
else
return 0;
handler_id = 0;
while (handlers && handlers->signal_id == signal_id)
{
if (handlers->id > 0 &&
handlers->func == func &&
handlers->func_data == data &&
(may_be_blocked || handlers->blocked == FALSE))
{
handler_id = handlers->id;
break;
}
handlers = handlers->next;
}
return handler_id;
}
static guint
gtk_signal_connect_by_type (GtkObject *object,
guint signal_id,
GtkSignalFunc func,
gpointer func_data,
GtkSignalDestroy destroy_func,
gint object_signal,
gint after,
gint no_marshal)
{
GtkObjectClass *class;
GtkHandler *handler;
gint found_it;
g_return_val_if_fail (object != NULL, 0);
g_return_val_if_fail (object->klass != NULL, 0);
/* Search through the signals for this object and make
* sure the one we are adding is valid. We need to perform
* the lookup on the objects parents as well. If it isn't
* valid then issue a warning and return.
* As of now (1998-05-27) this lookup shouldn't be neccessarry
* anymore since gtk_signal_lookup() has been reworked to only
* return correct signal ids per class-branch.
*/
found_it = FALSE;
class = object->klass;
while (class)
{
GtkType parent;
guint *object_signals;
guint nsignals;
guint i;
object_signals = class->signals;
nsignals = class->nsignals;
for (i = 0; i < nsignals; i++)
if (object_signals[i] == signal_id)
{
found_it = TRUE;
break;
}
parent = gtk_type_parent (class->type);
if (parent)
class = gtk_type_class (parent);
else
class = NULL;
}
if (!found_it)
{
g_warning ("gtk_signal_connect_by_type(): could not find signal id (%u) in the `%s' class ancestry",
signal_id,
gtk_type_name (object->klass->type));
return 0;
}
handler = gtk_signal_handler_new ();
handler->id = gtk_handler_id++;
handler->signal_id = signal_id;
handler->object_signal = object_signal;
handler->func = func;
handler->func_data = func_data;
handler->destroy_func = destroy_func;
handler->after = after != FALSE;
handler->no_marshal = no_marshal;
gtk_signal_handler_insert (object, handler);
return handler->id;
}
static GtkEmission*
gtk_emission_new (void)
{
GtkEmission *emission;
if (!gtk_emission_free_list)
{
GtkEmissionAllocator *emission_block;
guint i;
emission_block = g_new0 (GtkEmissionAllocator, EMISSION_BLOCK_SIZE);
for (i = 1; i < EMISSION_BLOCK_SIZE; i++)
{
(emission_block + i)->next = gtk_emission_free_list;
gtk_emission_free_list = (emission_block + i);
}
emission = &emission_block->emission;
}
else
{
emission = &gtk_emission_free_list->emission;
gtk_emission_free_list = gtk_emission_free_list->next;
}
emission->object = NULL;
emission->signal_id = 0;
return emission;
}
static void
gtk_emission_add (GList **emissions,
GtkObject *object,
guint signal_id)
{
GtkEmission *emission;
g_return_if_fail (emissions != NULL);
g_return_if_fail (object != NULL);
emission = gtk_emission_new ();
emission->object = object;
emission->signal_id = signal_id;
*emissions = g_list_prepend (*emissions, emission);
}
static void
gtk_emission_remove (GList **emissions,
GtkObject *object,
guint signal_id)
{
GList *tmp;
g_return_if_fail (emissions != NULL);
tmp = *emissions;
while (tmp)
{
GtkEmissionAllocator *ea;
ea = tmp->data;
if ((ea->emission.object == object) &&
(ea->emission.signal_id == signal_id))
{
*emissions = g_list_remove_link (*emissions, tmp);
g_list_free (tmp);
ea->next = gtk_emission_free_list;
gtk_emission_free_list = ea;
break;
}
tmp = tmp->next;
}
}
static gint
gtk_emission_check (GList *emissions,
GtkObject *object,
guint signal_id)
{
GtkEmission *emission;
GList *tmp;
tmp = emissions;
while (tmp)
{
emission = tmp->data;
tmp = tmp->next;
if ((emission->object == object) &&
(emission->signal_id == signal_id))
return TRUE;
}
return FALSE;
}
static gint
gtk_handlers_run (GtkHandler *handlers,
GtkHandlerInfo *info,
gint after)
{
while (handlers && handlers->signal_id == info->signal_id)
{
GtkHandler *handlers_next;
gtk_signal_handler_ref (handlers);
if (handlers->blocked == 0 && (handlers->after == after))
{
if (handlers->func)
{
if (handlers->no_marshal)
(* (GtkCallbackMarshal) handlers->func) (info->object,
handlers->func_data,
info->nparams,
info->params);
else if (handlers->object_signal)
(* info->marshaller) ((GtkObject*) handlers->func_data, /* don't GTK_OBJECT() cast */
handlers->func,
handlers->func_data,
info->params);
else
(* info->marshaller) (info->object,
handlers->func,
handlers->func_data,
info->params);
}
else if (global_marshaller)
(* global_marshaller) (info->object,
handlers->func_data,
info->nparams,
info->params,
info->param_types,
info->return_val);
if (gtk_emission_check (stop_emissions, info->object,
info->signal_id))
{
gtk_emission_remove (&stop_emissions, info->object,
info->signal_id);
if (info->signal_flags & GTK_RUN_NO_RECURSE)
gtk_emission_remove (&restart_emissions, info->object,
info->signal_id);
gtk_signal_handler_unref (handlers, info->object);
return EMISSION_DONE;
}
else if ((info->signal_flags & GTK_RUN_NO_RECURSE) &&
gtk_emission_check (restart_emissions, info->object,
info->signal_id))
{
gtk_emission_remove (&restart_emissions, info->object,
info->signal_id);
gtk_signal_handler_unref (handlers, info->object);
return EMISSION_RESTART;
}
}
handlers_next = handlers->next;
gtk_signal_handler_unref (handlers, info->object);
handlers = handlers_next;
}
return EMISSION_CONTINUE;
}
static gboolean
gtk_signal_collect_params (GtkArg *params,
guint n_params,
GtkType *param_types,
GtkType return_type,
va_list var_args)
{
register GtkArg *last_param;
register gboolean failed = FALSE;
for (last_param = params + n_params; params < last_param; params++)
{
register gchar *error;
params->type = *(param_types++);
params->name = NULL;
error = gtk_arg_collect_value (GTK_FUNDAMENTAL_TYPE (params->type),
params,
&var_args);
if (error)
{
failed = TRUE;
g_warning ("gtk_signal_collect_params(): %s", error);
g_free (error);
}
}
params->type = return_type;
params->name = NULL;
return_type = GTK_FUNDAMENTAL_TYPE (return_type);
if (return_type != GTK_TYPE_NONE)
{
if ((return_type >= GTK_TYPE_FLAT_FIRST &&
return_type <= GTK_TYPE_FLAT_LAST) ||
(return_type == GTK_TYPE_OBJECT))
{
GTK_VALUE_POINTER (*params) = va_arg (var_args, gpointer);
if (GTK_VALUE_POINTER (*params) == NULL)
{
failed = TRUE;
g_warning ("gtk_signal_collect_params(): invalid NULL pointer for return argument type `%s'",
gtk_type_name (params->type));
}
}
else
{
failed = TRUE;
g_warning ("gtk_signal_collect_params(): unsupported return argument type `%s'",
gtk_type_name (params->type));
}
}
else
GTK_VALUE_POINTER (*params) = NULL;
return failed;
}
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