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glib2.0/gobject/tests/accumulator.c

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/* GObject - GLib Type, Object, Parameter and Signal Library
* Copyright (C) 2001, 2003 Red Hat, Inc.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* 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 2.1 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, see <http://www.gnu.org/licenses/>.
*/
#include <glib-object.h>
#include "marshalers.h"
#include "testcommon.h"
/* What this test tests is the behavior of signal accumulators
* Two accumulators are tested:
*
* 1: A custom accumulator that appends the returned strings
* 2: The standard g_signal_accumulator_true_handled that stops
* emission on TRUE returns.
*/
/* TestObject, a parent class for TestObject */
#define TEST_TYPE_OBJECT (test_object_get_type ())
typedef struct _TestObject TestObject;
typedef struct _TestObjectClass TestObjectClass;
struct _TestObject
{
GObject parent_instance;
};
struct _TestObjectClass
{
GObjectClass parent_class;
gchar* (*test_signal1) (TestObject *tobject,
gint param);
gboolean (*test_signal2) (TestObject *tobject,
gint param);
GVariant* (*test_signal3) (TestObject *tobject,
gboolean *weak_ptr);
};
static GType test_object_get_type (void);
static gboolean
test_signal1_accumulator (GSignalInvocationHint *ihint,
GValue *return_accu,
const GValue *handler_return,
gpointer data)
{
const gchar *accu_string = g_value_get_string (return_accu);
const gchar *new_string = g_value_get_string (handler_return);
gchar *result_string;
if (accu_string)
result_string = g_strconcat (accu_string, new_string, NULL);
else if (new_string)
result_string = g_strdup (new_string);
else
result_string = NULL;
g_value_take_string (return_accu, result_string);
return TRUE;
}
static gchar *
test_object_signal1_callback_before (TestObject *tobject,
gint param,
gpointer data)
{
return g_strdup ("<before>");
}
static gchar *
test_object_real_signal1 (TestObject *tobject,
gint param)
{
return g_strdup ("<default>");
}
static gchar *
test_object_signal1_callback_after (TestObject *tobject,
gint param,
gpointer data)
{
return g_strdup ("<after>");
}
static gboolean
test_object_signal2_callback_before (TestObject *tobject,
gint param)
{
switch (param)
{
case 1: return TRUE;
case 2: return FALSE;
case 3: return FALSE;
case 4: return FALSE;
}
g_assert_not_reached ();
return FALSE;
}
static gboolean
test_object_real_signal2 (TestObject *tobject,
gint param)
{
switch (param)
{
case 1: g_assert_not_reached (); return FALSE;
case 2: return TRUE;
case 3: return FALSE;
case 4: return FALSE;
}
g_assert_not_reached ();
return FALSE;
}
static gboolean
test_object_signal2_callback_after (TestObject *tobject,
gint param)
{
switch (param)
{
case 1: g_assert_not_reached (); return FALSE;
case 2: g_assert_not_reached (); return FALSE;
case 3: return TRUE;
case 4: return FALSE;
}
g_assert_not_reached ();
return FALSE;
}
static gboolean
test_signal3_accumulator (GSignalInvocationHint *ihint,
GValue *return_accu,
const GValue *handler_return,
gpointer data)
{
GVariant *variant;
variant = g_value_get_variant (handler_return);
g_assert_false (g_variant_is_floating (variant));
g_value_set_variant (return_accu, variant);
return variant == NULL;
}
/* To be notified when the variant is finalised, we construct
* it from data with a custom GDestroyNotify.
*/
typedef struct {
char *mem;
gsize n;
gboolean *weak_ptr;
} VariantData;
static void
free_data (VariantData *data)
{
*(data->weak_ptr) = TRUE;
g_free (data->mem);
g_slice_free (VariantData, data);
}
static GVariant *
test_object_real_signal3 (TestObject *tobject,
gboolean *weak_ptr)
{
GVariant *variant;
VariantData *data;
variant = g_variant_ref_sink (g_variant_new_uint32 (42));
data = g_slice_new (VariantData);
data->weak_ptr = weak_ptr;
data->n = g_variant_get_size (variant);
data->mem = g_malloc (data->n);
g_variant_store (variant, data->mem);
g_variant_unref (variant);
variant = g_variant_new_from_data (G_VARIANT_TYPE ("u"),
data->mem,
data->n,
TRUE,
(GDestroyNotify) free_data,
data);
return g_variant_ref_sink (variant);
}
static void
test_object_class_init (TestObjectClass *class)
{
class->test_signal1 = test_object_real_signal1;
class->test_signal2 = test_object_real_signal2;
class->test_signal3 = test_object_real_signal3;
g_signal_new ("test-signal1",
G_OBJECT_CLASS_TYPE (class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (TestObjectClass, test_signal1),
test_signal1_accumulator, NULL,
test_STRING__INT,
G_TYPE_STRING, 1, G_TYPE_INT);
g_signal_new ("test-signal2",
G_OBJECT_CLASS_TYPE (class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (TestObjectClass, test_signal2),
g_signal_accumulator_true_handled, NULL,
test_BOOLEAN__INT,
G_TYPE_BOOLEAN, 1, G_TYPE_INT);
g_signal_new ("test-signal3",
G_OBJECT_CLASS_TYPE (class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (TestObjectClass, test_signal3),
test_signal3_accumulator, NULL,
test_VARIANT__POINTER,
G_TYPE_VARIANT, 1, G_TYPE_POINTER);
}
static DEFINE_TYPE(TestObject, test_object,
test_object_class_init, NULL, NULL,
G_TYPE_OBJECT);
static void
test_accumulator (void)
{
TestObject *object;
gchar *string_result;
gboolean bool_result;
gboolean variant_finalised;
GVariant *variant_result;
object = g_object_new (TEST_TYPE_OBJECT, NULL);
g_signal_connect (object, "test-signal1",
G_CALLBACK (test_object_signal1_callback_before), NULL);
g_signal_connect_after (object, "test-signal1",
G_CALLBACK (test_object_signal1_callback_after), NULL);
g_signal_emit_by_name (object, "test-signal1", 0, &string_result);
g_assert_cmpstr (string_result, ==, "<before><default><after>");
g_free (string_result);
g_signal_connect (object, "test-signal2",
G_CALLBACK (test_object_signal2_callback_before), NULL);
g_signal_connect_after (object, "test-signal2",
G_CALLBACK (test_object_signal2_callback_after), NULL);
bool_result = FALSE;
g_signal_emit_by_name (object, "test-signal2", 1, &bool_result);
g_assert_true (bool_result);
bool_result = FALSE;
g_signal_emit_by_name (object, "test-signal2", 2, &bool_result);
g_assert_true (bool_result);
bool_result = FALSE;
g_signal_emit_by_name (object, "test-signal2", 3, &bool_result);
g_assert_true (bool_result);
bool_result = TRUE;
g_signal_emit_by_name (object, "test-signal2", 4, &bool_result);
g_assert_false (bool_result);
variant_finalised = FALSE;
variant_result = NULL;
g_signal_emit_by_name (object, "test-signal3", &variant_finalised, &variant_result);
g_assert_nonnull (variant_result);
g_assert_false (g_variant_is_floating (variant_result));
/* Test that variant_result had refcount 1 */
g_assert_false (variant_finalised);
g_variant_unref (variant_result);
g_assert_true (variant_finalised);
g_object_unref (object);
}
int
main (int argc,
char *argv[])
{
g_log_set_always_fatal (g_log_set_always_fatal (G_LOG_FATAL_MASK) |
G_LOG_LEVEL_WARNING |
G_LOG_LEVEL_CRITICAL);
g_test_init (&argc, &argv, NULL);
g_test_add_func ("/gobject/accumulator", test_accumulator);
return g_test_run ();
}
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