Revision e18ea70ff4b42f09d32d4b1c4c3a61434adc6222 authored by Tobias Ellinghaus on 01 December 2015, 11:58:16 UTC, committed by Tobias Ellinghaus on 01 December 2015, 11:58:16 UTC
1 parent b05fa3c
signal.c
/*
This file is part of darktable,
copyright (c) 2011 Henrik Andersson.
darktable is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
darktable 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with darktable. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <glib.h>
#include "control/control.h"
#include "control/signal.h"
typedef struct dt_control_signal_t
{
/* the sinks for the signals */
GObject *sink;
} dt_control_signal_t;
/*
GSignalFlags signal_flags,
...);
*/
typedef struct dt_signal_description
{
const char *name;
GSignalAccumulator accumulator;
gpointer accu_data;
GType return_type;
GSignalCMarshaller c_marshaller;
guint n_params;
GType *param_types;
GCallback destructor;
gboolean synchronous;
} dt_signal_description;
static GType uint_arg[] = { G_TYPE_UINT };
static GType pointer_2arg[] = { G_TYPE_POINTER, G_TYPE_POINTER };
static GType image_export_arg[]
= { G_TYPE_UINT, G_TYPE_STRING, G_TYPE_POINTER, G_TYPE_POINTER, G_TYPE_POINTER, G_TYPE_POINTER };
static dt_signal_description _signal_description[DT_SIGNAL_COUNT] = {
/* Global signals */
{ "dt-global-mouse-over-image-change", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_MOUSE_OVER_IMAGE_CHANGE
{ "dt-control-redraw-all", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_CONTROL_REDRAW_ALL
{ "dt-control-redraw-center", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_CONTROL_REDRAW_CENTER
{ "dt-viewmanager-view-changed", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_generic, 2,
pointer_2arg, NULL, FALSE }, // DT_SIGNAL_VIEWMANAGER_VIEW_CHANGED
{ "dt-viewmanager-filmstrip-activate", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL }, // DT_SIGNAL_VIEWMANAGER_FILMSTRIP_ACTIVATE
{ "dt-collection-changed", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_COLLECTION_CHANGED
{ "dt-tag-changed", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_TAG_CHANGED
{ "dt-style-changed", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_STYLE_CHANGED
{ "dt-filmrolls-changed", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_FILMROLLS_CHANGED
{ "dt-filmrolls-imported", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__UINT, 1,
uint_arg, NULL, FALSE }, // DT_SIGNAL_FILMROLLS_IMPORTED
{ "dt-filmrolls-removed", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_FILMROLLS_REMOVED
/* Develop related signals */
{ "dt-develop-initialized", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_DEVELOP_INITIALIZED
{ "dt-develop-mipmap-updated", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_DEVELOP_MIPMAP_UPDATED
{ "dt-develop-preview-pipe-finished", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_DEVELOP_PREVIEW_PIPE_FINISHED
{ "dt-develop-ui-pipe-finished", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_DEVELOP_UI_PIPE_FINISHED
{ "dt-develop-history-change", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_HISTORY_CHANGE
{ "dt-develop-image-changed", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_DEVELOP_IMAGE_CHANGE
{ "dt-control-profile-changed", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_CONTROL_PROFILE_CHANGED
{ "dt-image-import", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__UINT, 1,
uint_arg, NULL, FALSE }, // DT_SIGNAL_IMAGE_IMPORT
{ "dt-image-export-tmpfile", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_generic, 6,
image_export_arg, NULL, TRUE }, // DT_SIGNAL_IMAGE_EXPORT_TMPFILE
{ "dt-imageio-storage-change", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_IMAGEIO_STORAGE_CHANGE
{ "dt-preferences-changed", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_PREFERENCES_CHANGE
{ "dt-camera-detected", NULL, NULL, G_TYPE_NONE, g_cclosure_marshal_VOID__VOID, 0,
NULL, NULL, FALSE }, // DT_SIGNAL_CAMERA_DETECTED,
};
static GType _signal_type;
dt_control_signal_t *dt_control_signal_init()
{
dt_control_signal_t *ctlsig = g_malloc0(sizeof(dt_control_signal_t));
/* setup dummy gobject typeinfo */
GTypeQuery query;
GTypeInfo type_info = { 0, (GBaseInitFunc)NULL, (GBaseFinalizeFunc)NULL, (GClassInitFunc)NULL,
(GClassFinalizeFunc)NULL, NULL, 0, 0, (GInstanceInitFunc)NULL };
g_type_query(G_TYPE_OBJECT, &query);
type_info.class_size = query.class_size;
type_info.instance_size = query.instance_size;
_signal_type = g_type_register_static(G_TYPE_OBJECT, "DarktableSignals", &type_info, 0);
/* create our pretty empty gobject */
ctlsig->sink = g_object_new(_signal_type, NULL);
/* create the signals */
for(int k = 0; k < DT_SIGNAL_COUNT; k++)
{
g_signal_newv(_signal_description[k].name, _signal_type, G_SIGNAL_RUN_LAST, 0,
_signal_description[k].accumulator, _signal_description[k].accu_data,
_signal_description[k].c_marshaller, _signal_description[k].return_type,
_signal_description[k].n_params, _signal_description[k].param_types);
if(_signal_description[k].destructor) {
g_signal_connect_after(G_OBJECT(ctlsig->sink), _signal_description[k].name, _signal_description[k].destructor, NULL);
}
}
return ctlsig;
}
typedef struct _signal_param_t
{
GValue *instance_and_params;
guint signal_id;
guint n_params;
} _signal_param_t;
static gboolean _signal_raise(gpointer user_data)
{
_signal_param_t *params = (_signal_param_t *)user_data;
g_signal_emitv(params->instance_and_params, params->signal_id, 0, NULL);
for(int i = 0; i <= params->n_params; i++) g_value_unset(¶ms->instance_and_params[i]);
free(params->instance_and_params);
free(params);
return FALSE;
}
typedef struct async_com_data {
GCond end_cond;
GMutex end_mutex;
gpointer user_data;
} async_com_data;
gboolean _async_com_callback(gpointer data)
{
async_com_data *communication = (async_com_data*)data;
g_mutex_lock(&communication->end_mutex);
_signal_raise(communication->user_data);
g_cond_signal(&communication->end_cond);
g_mutex_unlock(&communication->end_mutex);
return FALSE;
}
void dt_control_signal_raise(const dt_control_signal_t *ctlsig, dt_signal_t signal, ...)
{
// ignore all signals on shutdown
if(!dt_control_running()) return;
dt_signal_description *signal_description = &_signal_description[signal];
_signal_param_t *params = (_signal_param_t *)malloc(sizeof(_signal_param_t));
if(!params) return;
GValue *instance_and_params = calloc(1 + signal_description->n_params, sizeof(GValue));
if(!instance_and_params)
{
free(params);
return;
}
// 0th element has to be the instance to call
g_value_init(instance_and_params, _signal_type);
g_value_set_object(instance_and_params, ctlsig->sink);
// the rest of instance_and_params will be the params for the callback
va_list extra_args;
va_start(extra_args, signal);
for(int i = 1; i <= signal_description->n_params; i++)
{
GType type = signal_description->param_types[i-1];
g_value_init(&instance_and_params[i], type);
switch(type)
{
case G_TYPE_UINT:
g_value_set_uint(&instance_and_params[i], va_arg(extra_args, guint));
break;
case G_TYPE_STRING:
g_value_set_string(&instance_and_params[i], va_arg(extra_args, const char *));
break;
case G_TYPE_POINTER:
g_value_set_pointer(&instance_and_params[i], va_arg(extra_args, void *));
break;
default:
fprintf(stderr, "error: unsupported parameter type `%s' for signal `%s'\n", g_type_name(type), signal_description->name);
va_end(extra_args);
for(int j = 0; j <= i; j++) g_value_unset(&instance_and_params[j]);
free(instance_and_params);
free(params);
return;
}
}
va_end(extra_args);
params->instance_and_params = instance_and_params;
params->signal_id = g_signal_lookup(_signal_description[signal].name, _signal_type);
params->n_params = signal_description->n_params;
if(!signal_description->synchronous)
{
g_main_context_invoke(NULL, _signal_raise, params);
} else {
if(pthread_equal(darktable.control->gui_thread, pthread_self())) {
_signal_raise(params);
} else {
async_com_data communication;
g_mutex_init(&communication.end_mutex);
g_cond_init(&communication.end_cond);
g_mutex_lock(&communication.end_mutex);
communication.user_data = params;
g_main_context_invoke(NULL,_async_com_callback,&communication);
g_cond_wait(&communication.end_cond,&communication.end_mutex);
g_mutex_unlock(&communication.end_mutex);
g_mutex_clear(&communication.end_mutex);
}
}
}
void dt_control_signal_connect(const dt_control_signal_t *ctlsig, dt_signal_t signal, GCallback cb,
gpointer user_data)
{
g_signal_connect(G_OBJECT(ctlsig->sink), _signal_description[signal].name, G_CALLBACK(cb), user_data);
}
void dt_control_signal_disconnect(const struct dt_control_signal_t *ctlsig, GCallback cb, gpointer user_data)
{
g_signal_handlers_disconnect_matched(G_OBJECT(ctlsig->sink), G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA, 0,
0, NULL, cb, user_data);
}
// modelines: These editor modelines have been set for all relevant files by tools/update_modelines.sh
// vim: shiftwidth=2 expandtab tabstop=2 cindent
// kate: tab-indents: off; indent-width 2; replace-tabs on; indent-mode cstyle; remove-trailing-space on;
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