1  /* GObject - GLib Type, Object, Parameter and Signal Library
       2   * Copyright (C) 2013 Red Hat, Inc.
       3   * Copy and pasted from accumulator.c and modified.
       4   *
       5   * SPDX-License-Identifier: LGPL-2.1-or-later
       6   *
       7   * This library is free software; you can redistribute it and/or
       8   * modify it under the terms of the GNU Lesser General Public
       9   * License as published by the Free Software Foundation; either
      10   * version 2.1 of the License, or (at your option) any later version.
      11   *
      12   * This library is distributed in the hope that it will be useful,
      13   * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15   * Lesser General Public License for more details.
      16   *
      17   * You should have received a copy of the GNU Lesser General
      18   * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
      19   */
      20  
      21  #include <glib-object.h>
      22  
      23  #include "testcommon.h"
      24  
      25  /* What this test tests is the behavior of signal disconnection
      26   * from within a signal handler for the signal being disconnected.
      27   *
      28   * The test demonstrates that signal handlers disconnected from a signal
      29   * from an earlier handler in the same emission will not be run.
      30   *
      31   * It also demonstrates that signal handlers connected from a signal
      32   * from an earlier handler in the same emission will not be run.
      33   */
      34  
      35  /* TestObject, a parent class for TestObject */
      36  #define TEST_TYPE_OBJECT         (test_object_get_type ())
      37  typedef struct _TestObject        TestObject;
      38  typedef struct _TestObjectClass   TestObjectClass;
      39  
      40  static gboolean callback1_ran = FALSE, callback2_ran = FALSE,
      41    callback3_ran = FALSE, default_handler_ran = FALSE;
      42  
      43  struct _TestObject
      44  {
      45    GObject parent_instance;
      46  };
      47  
      48  struct _TestObjectClass
      49  {
      50    GObjectClass parent_class;
      51  
      52    void   (*test_signal) (TestObject *object);
      53  };
      54  
      55  static GType test_object_get_type (void);
      56  
      57  static void
      58  test_object_real_signal (TestObject *object)
      59  {
      60    default_handler_ran = TRUE;
      61  }
      62  
      63  static void
      64  test_object_signal_callback3 (TestObject *object,
      65                                gpointer    data)
      66  {
      67    callback3_ran = TRUE;
      68  }
      69  
      70  static void
      71  test_object_signal_callback2 (TestObject *object,
      72                                gpointer    data)
      73  {
      74    callback2_ran = TRUE;
      75  }
      76  
      77  static void
      78  test_object_signal_callback1 (TestObject *object,
      79                                gpointer    data)
      80  {
      81    callback1_ran = TRUE;
      82    g_signal_handlers_disconnect_by_func (G_OBJECT (object),
      83                                          test_object_signal_callback2,
      84                                          data);
      85    g_signal_connect (object, "test-signal",
      86                      G_CALLBACK (test_object_signal_callback3), NULL);
      87  }
      88  
      89  static void
      90  test_object_class_init (TestObjectClass *class)
      91  {
      92    class->test_signal = test_object_real_signal;
      93  
      94    g_signal_new ("test-signal",
      95                  G_OBJECT_CLASS_TYPE (class),
      96                  G_SIGNAL_RUN_LAST,
      97                  G_STRUCT_OFFSET (TestObjectClass, test_signal),
      98                  NULL, NULL, NULL, G_TYPE_NONE, 0);
      99  }
     100  
     101  static DEFINE_TYPE(TestObject, test_object,
     102                     test_object_class_init, NULL, NULL,
     103                     G_TYPE_OBJECT)
     104  
     105  static void
     106  test_basic_signals (void)
     107  {
     108    TestObject *object;
     109  
     110    object = g_object_new (TEST_TYPE_OBJECT, NULL);
     111  
     112    g_signal_connect (object, "test-signal",
     113                      G_CALLBACK (test_object_signal_callback1), NULL);
     114    g_signal_connect (object, "test-signal",
     115                      G_CALLBACK (test_object_signal_callback2), NULL);
     116    g_signal_emit_by_name (object, "test-signal");
     117  
     118    g_assert_true (callback1_ran);
     119    g_assert_false (callback2_ran);
     120    g_assert_false (callback3_ran);
     121    g_assert_true (default_handler_ran);
     122  
     123    g_object_unref (object);
     124  }
     125  
     126  int
     127  main (int  argc,
     128        char *argv[])
     129  {
     130    g_log_set_always_fatal (g_log_set_always_fatal (G_LOG_FATAL_MASK) |
     131                            G_LOG_LEVEL_WARNING |
     132                            G_LOG_LEVEL_CRITICAL);
     133  
     134    g_test_init (&argc, &argv, NULL);
     135  
     136    g_test_add_func ("/gobject/basic-signals", test_basic_signals);
     137  
     138    return g_test_run ();
     139  }