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glib/gio/tests/task.c

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/*
* Copyright 2012 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 2.1 of the License, or (at your option) any later version.
*
* See the included COPYING file for more information.
*/
#include <gio/gio.h>
#include <string.h>
static GMainLoop *loop;
static GThread *main_thread;
static gssize magic;
/* We need objects for a few tests where we don't care what type
* they are, just that they're GObjects.
*/
#define g_dummy_object_new g_socket_client_new
static gboolean
idle_quit_loop (gpointer user_data)
{
g_main_loop_quit (loop);
return FALSE;
}
static void
completed_cb (GObject *gobject,
GParamSpec *pspec,
gpointer user_data)
{
gboolean *notification_emitted = user_data;
*notification_emitted = TRUE;
}
static void
wait_for_completed_notification (GTask *task)
{
gboolean notification_emitted = FALSE;
gboolean is_completed = FALSE;
/* Hold a ref. so we can check the :completed property afterwards. */
g_object_ref (task);
g_signal_connect (task, "notify::completed",
(GCallback) completed_cb, &notification_emitted);
g_idle_add (idle_quit_loop, NULL);
g_main_loop_run (loop);
g_assert_true (notification_emitted);
g_assert_true (g_task_get_completed (task));
g_object_get (G_OBJECT (task), "completed", &is_completed, NULL);
g_assert_true (is_completed);
g_object_unref (task);
}
/* test_basic */
static void
basic_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
gssize *result_out = user_data;
GError *error = NULL;
g_assert (object == NULL);
g_assert (g_task_is_valid (result, object));
g_assert (g_async_result_get_user_data (result) == user_data);
g_assert (!g_task_had_error (G_TASK (result)));
g_assert_false (g_task_get_completed (G_TASK (result)));
*result_out = g_task_propagate_int (G_TASK (result), &error);
g_assert_no_error (error);
g_assert (!g_task_had_error (G_TASK (result)));
g_main_loop_quit (loop);
}
static gboolean
basic_return (gpointer user_data)
{
GTask *task = user_data;
g_task_return_int (task, magic);
g_object_unref (task);
return FALSE;
}
static void
basic_destroy_notify (gpointer user_data)
{
gboolean *destroyed = user_data;
*destroyed = TRUE;
}
static void
test_basic (void)
{
GTask *task;
gssize result;
gboolean task_data_destroyed = FALSE;
gboolean notification_emitted = FALSE;
task = g_task_new (NULL, NULL, basic_callback, &result);
g_task_set_task_data (task, &task_data_destroyed, basic_destroy_notify);
g_object_add_weak_pointer (G_OBJECT (task), (gpointer *)&task);
g_signal_connect (task, "notify::completed",
(GCallback) completed_cb, &notification_emitted);
g_idle_add (basic_return, task);
g_main_loop_run (loop);
g_assert_cmpint (result, ==, magic);
g_assert (task_data_destroyed == TRUE);
g_assert_true (notification_emitted);
g_assert (task == NULL);
}
/* test_error */
static void
error_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
gssize *result_out = user_data;
GError *error = NULL;
g_assert (object == NULL);
g_assert (g_task_is_valid (result, object));
g_assert (g_async_result_get_user_data (result) == user_data);
g_assert (g_task_had_error (G_TASK (result)));
g_assert_false (g_task_get_completed (G_TASK (result)));
*result_out = g_task_propagate_int (G_TASK (result), &error);
g_assert_error (error, G_IO_ERROR, G_IO_ERROR_FAILED);
g_error_free (error);
g_assert (g_task_had_error (G_TASK (result)));
g_main_loop_quit (loop);
}
static gboolean
error_return (gpointer user_data)
{
GTask *task = user_data;
g_task_return_new_error (task,
G_IO_ERROR, G_IO_ERROR_FAILED,
"Failed");
g_object_unref (task);
return FALSE;
}
static void
error_destroy_notify (gpointer user_data)
{
gboolean *destroyed = user_data;
*destroyed = TRUE;
}
static void
test_error (void)
{
GTask *task;
gssize result;
gboolean first_task_data_destroyed = FALSE;
gboolean second_task_data_destroyed = FALSE;
gboolean notification_emitted = FALSE;
task = g_task_new (NULL, NULL, error_callback, &result);
g_object_add_weak_pointer (G_OBJECT (task), (gpointer *)&task);
g_signal_connect (task, "notify::completed",
(GCallback) completed_cb, &notification_emitted);
g_assert (first_task_data_destroyed == FALSE);
g_task_set_task_data (task, &first_task_data_destroyed, error_destroy_notify);
g_assert (first_task_data_destroyed == FALSE);
/* Calling g_task_set_task_data() again will destroy the first data */
g_task_set_task_data (task, &second_task_data_destroyed, error_destroy_notify);
g_assert (first_task_data_destroyed == TRUE);
g_assert (second_task_data_destroyed == FALSE);
g_idle_add (error_return, task);
g_main_loop_run (loop);
g_assert_cmpint (result, ==, -1);
g_assert (second_task_data_destroyed == TRUE);
g_assert_true (notification_emitted);
g_assert (task == NULL);
}
/* test_return_from_same_iteration: calling g_task_return_* from the
* loop iteration the task was created in defers completion until the
* next iteration.
*/
gboolean same_result = FALSE;
gboolean same_notification_emitted = FALSE;
static void
same_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
gboolean *result_out = user_data;
GError *error = NULL;
g_assert (object == NULL);
g_assert (g_task_is_valid (result, object));
g_assert (g_async_result_get_user_data (result) == user_data);
g_assert (!g_task_had_error (G_TASK (result)));
g_assert_false (g_task_get_completed (G_TASK (result)));
*result_out = g_task_propagate_boolean (G_TASK (result), &error);
g_assert_no_error (error);
g_assert (!g_task_had_error (G_TASK (result)));
g_main_loop_quit (loop);
}
static gboolean
same_start (gpointer user_data)
{
gpointer *weak_pointer = user_data;
GTask *task;
task = g_task_new (NULL, NULL, same_callback, &same_result);
*weak_pointer = task;
g_object_add_weak_pointer (G_OBJECT (task), weak_pointer);
g_signal_connect (task, "notify::completed",
(GCallback) completed_cb, &same_notification_emitted);
g_task_return_boolean (task, TRUE);
g_object_unref (task);
/* same_callback should not have been invoked yet */
g_assert (same_result == FALSE);
g_assert (*weak_pointer == task);
g_assert_false (same_notification_emitted);
return FALSE;
}
static void
test_return_from_same_iteration (void)
{
gpointer weak_pointer;
g_idle_add (same_start, &weak_pointer);
g_main_loop_run (loop);
g_assert (same_result == TRUE);
g_assert (weak_pointer == NULL);
g_assert_true (same_notification_emitted);
}
/* test_return_from_toplevel: calling g_task_return_* from outside any
* main loop completes the task inside the main loop.
*/
gboolean toplevel_notification_emitted = FALSE;
static void
toplevel_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
gboolean *result_out = user_data;
GError *error = NULL;
g_assert (object == NULL);
g_assert (g_task_is_valid (result, object));
g_assert (g_async_result_get_user_data (result) == user_data);
g_assert (!g_task_had_error (G_TASK (result)));
g_assert_false (g_task_get_completed (G_TASK (result)));
*result_out = g_task_propagate_boolean (G_TASK (result), &error);
g_assert_no_error (error);
g_assert (!g_task_had_error (G_TASK (result)));
g_main_loop_quit (loop);
}
static void
test_return_from_toplevel (void)
{
GTask *task;
gboolean result = FALSE;
task = g_task_new (NULL, NULL, toplevel_callback, &result);
g_object_add_weak_pointer (G_OBJECT (task), (gpointer *)&task);
g_signal_connect (task, "notify::completed",
(GCallback) completed_cb, &toplevel_notification_emitted);
g_task_return_boolean (task, TRUE);
g_object_unref (task);
/* toplevel_callback should not have been invoked yet */
g_assert (result == FALSE);
g_assert (task != NULL);
g_assert_false (toplevel_notification_emitted);
g_main_loop_run (loop);
g_assert (result == TRUE);
g_assert (task == NULL);
g_assert_true (toplevel_notification_emitted);
}
/* test_return_from_anon_thread: calling g_task_return_* from a
* thread with no thread-default main context will complete the
* task in the task's context/thread.
*/
gboolean anon_thread_notification_emitted = FALSE;
GThread *anon_thread;
static void
anon_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
gssize *result_out = user_data;
GError *error = NULL;
g_assert (object == NULL);
g_assert (g_task_is_valid (result, object));
g_assert (g_async_result_get_user_data (result) == user_data);
g_assert (!g_task_had_error (G_TASK (result)));
g_assert_false (g_task_get_completed (G_TASK (result)));
g_assert (g_thread_self () == main_thread);
*result_out = g_task_propagate_int (G_TASK (result), &error);
g_assert_no_error (error);
g_assert (!g_task_had_error (G_TASK (result)));
g_main_loop_quit (loop);
}
static gpointer
anon_thread_func (gpointer user_data)
{
GTask *task = user_data;
g_task_return_int (task, magic);
g_object_unref (task);
return NULL;
}
static gboolean
anon_start (gpointer user_data)
{
GTask *task = user_data;
anon_thread = g_thread_new ("test_return_from_anon_thread",
anon_thread_func, task);
return FALSE;
}
static void
test_return_from_anon_thread (void)
{
GTask *task;
gssize result = 0;
task = g_task_new (NULL, NULL, anon_callback, &result);
g_object_add_weak_pointer (G_OBJECT (task), (gpointer *)&task);
g_signal_connect (task, "notify::completed",
(GCallback) completed_cb,
&anon_thread_notification_emitted);
g_idle_add (anon_start, task);
g_main_loop_run (loop);
g_thread_join (anon_thread);
g_assert_cmpint (result, ==, magic);
g_assert (task == NULL);
g_assert_true (anon_thread_notification_emitted);
}
/* test_return_from_wrong_thread: calling g_task_return_* from a
* thread with its own thread-default main context will complete the
* task in the task's context/thread.
*/
gboolean wrong_thread_notification_emitted = FALSE;
GThread *wrong_thread;
static void
wrong_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
gssize *result_out = user_data;
GError *error = NULL;
g_assert (object == NULL);
g_assert (g_task_is_valid (result, object));
g_assert (g_async_result_get_user_data (result) == user_data);
g_assert (!g_task_had_error (G_TASK (result)));
g_assert_false (g_task_get_completed (G_TASK (result)));
g_assert (g_thread_self () == main_thread);
*result_out = g_task_propagate_int (G_TASK (result), &error);
g_assert_no_error (error);
g_assert (!g_task_had_error (G_TASK (result)));
g_main_loop_quit (loop);
}
static gpointer
wrong_thread_func (gpointer user_data)
{
GTask *task = user_data;
GMainContext *context;
context = g_main_context_new ();
g_main_context_push_thread_default (context);
g_assert (g_task_get_context (task) != context);
g_task_return_int (task, magic);
g_object_unref (task);
g_main_context_pop_thread_default (context);
g_main_context_unref (context);
return NULL;
}
static gboolean
wrong_start (gpointer user_data)
{
GTask *task = user_data;
wrong_thread = g_thread_new ("test_return_from_anon_thread",
wrong_thread_func, task);
return FALSE;
}
static void
test_return_from_wrong_thread (void)
{
GTask *task;
gssize result = 0;
task = g_task_new (NULL, NULL, wrong_callback, &result);
g_object_add_weak_pointer (G_OBJECT (task), (gpointer *)&task);
g_signal_connect (task, "notify::completed",
(GCallback) completed_cb,
&wrong_thread_notification_emitted);
g_idle_add (wrong_start, task);
g_main_loop_run (loop);
g_thread_join (wrong_thread);
g_assert_cmpint (result, ==, magic);
g_assert (task == NULL);
g_assert_true (wrong_thread_notification_emitted);
}
/* test_no_callback */
static void
test_no_callback (void)
{
GTask *task;
task = g_task_new (NULL, NULL, NULL, NULL);
g_object_add_weak_pointer (G_OBJECT (task), (gpointer *)&task);
g_task_return_boolean (task, TRUE);
g_object_unref (task);
/* Even though there’s no callback, the :completed notification has to
* happen in an idle handler. */
g_assert_nonnull (task);
wait_for_completed_notification (task);
g_assert_null (task);
}
/* test_report_error */
static void test_report_error (void);
gboolean error_notification_emitted = FALSE;
static void
report_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
gpointer *weak_pointer = user_data;
GError *error = NULL;
gssize ret;
g_assert (object == NULL);
g_assert (g_task_is_valid (result, object));
g_assert (g_async_result_get_user_data (result) == user_data);
g_assert (g_async_result_is_tagged (result, test_report_error));
g_assert (g_task_get_source_tag (G_TASK (result)) == test_report_error);
g_assert (g_task_had_error (G_TASK (result)));
g_assert_false (g_task_get_completed (G_TASK (result)));
ret = g_task_propagate_int (G_TASK (result), &error);
g_assert_error (error, G_IO_ERROR, G_IO_ERROR_FAILED);
g_assert_cmpint (ret, ==, -1);
g_error_free (error);
g_assert (g_task_had_error (G_TASK (result)));
*weak_pointer = result;
g_object_add_weak_pointer (G_OBJECT (result), weak_pointer);
g_signal_connect (result, "notify::completed",
(GCallback) completed_cb, &error_notification_emitted);
g_main_loop_quit (loop);
}
static void
test_report_error (void)
{
gpointer weak_pointer = (gpointer)-1;
g_task_report_new_error (NULL, report_callback, &weak_pointer,
test_report_error,
G_IO_ERROR, G_IO_ERROR_FAILED,
"Failed");
g_main_loop_run (loop);
g_assert (weak_pointer == NULL);
g_assert_true (error_notification_emitted);
}
/* test_priority: tasks complete in priority order */
static int counter = 0;
static void
priority_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
gssize *ret_out = user_data;
GError *error = NULL;
g_assert (object == NULL);
g_assert (g_task_is_valid (result, object));
g_assert (g_async_result_get_user_data (result) == user_data);
g_assert (!g_task_had_error (G_TASK (result)));
g_assert_false (g_task_get_completed (G_TASK (result)));
g_task_propagate_boolean (G_TASK (result), &error);
g_assert_no_error (error);
g_assert (!g_task_had_error (G_TASK (result)));
*ret_out = ++counter;
if (counter == 3)
g_main_loop_quit (loop);
}
static void
test_priority (void)
{
GTask *t1, *t2, *t3;
gssize ret1, ret2, ret3;
/* t2 has higher priority than either t1 or t3, so we can't
* accidentally pass the test just by completing the tasks in the
* order they were created (or in reverse order).
*/
t1 = g_task_new (NULL, NULL, priority_callback, &ret1);
g_task_set_priority (t1, G_PRIORITY_DEFAULT);
g_task_return_boolean (t1, TRUE);
g_object_unref (t1);
t2 = g_task_new (NULL, NULL, priority_callback, &ret2);
g_task_set_priority (t2, G_PRIORITY_HIGH);
g_task_return_boolean (t2, TRUE);
g_object_unref (t2);
t3 = g_task_new (NULL, NULL, priority_callback, &ret3);
g_task_set_priority (t3, G_PRIORITY_LOW);
g_task_return_boolean (t3, TRUE);
g_object_unref (t3);
g_main_loop_run (loop);
g_assert_cmpint (ret2, ==, 1);
g_assert_cmpint (ret1, ==, 2);
g_assert_cmpint (ret3, ==, 3);
}
/* Test that getting and setting the task name works. */
static void name_callback (GObject *object,
GAsyncResult *result,
gpointer user_data);
static void
test_name (void)
{
GTask *t1 = NULL;
gchar *name1 = NULL;
t1 = g_task_new (NULL, NULL, name_callback, &name1);
g_task_set_name (t1, "some task");
g_task_return_boolean (t1, TRUE);
g_object_unref (t1);
g_main_loop_run (loop);
g_assert_cmpstr (name1, ==, "some task");
g_free (name1);
}
static void
name_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
gchar **name_out = user_data;
GError *local_error = NULL;
g_assert_null (*name_out);
*name_out = g_strdup (g_task_get_name (G_TASK (result)));
g_task_propagate_boolean (G_TASK (result), &local_error);
g_assert_no_error (local_error);
g_main_loop_quit (loop);
}
/* test_asynchronous_cancellation: cancelled tasks are returned
* asynchronously, i.e. not from inside the GCancellable::cancelled
* handler.
*/
static void
asynchronous_cancellation_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
GError *error = NULL;
g_assert_null (object);
g_assert_true (g_task_is_valid (result, object));
g_assert_true (g_async_result_get_user_data (result) == user_data);
g_assert_true (g_task_had_error (G_TASK (result)));
g_assert_false (g_task_get_completed (G_TASK (result)));
g_task_propagate_boolean (G_TASK (result), &error);
g_assert_error (error, G_IO_ERROR, G_IO_ERROR_CANCELLED);
g_clear_error (&error);
g_assert_true (g_task_had_error (G_TASK (result)));
g_main_loop_quit (loop);
}
static gboolean
asynchronous_cancellation_cancel_task (gpointer user_data)
{
GCancellable *cancellable;
GTask *task = G_TASK (user_data);
cancellable = g_task_get_cancellable (task);
g_assert_true (G_IS_CANCELLABLE (cancellable));
g_cancellable_cancel (cancellable);
g_assert_false (g_task_get_completed (task));
return G_SOURCE_REMOVE;
}
static void
asynchronous_cancellation_cancelled (GCancellable *cancellable,
gpointer user_data)
{
GTask *task = G_TASK (user_data);
guint run_task_id;
g_assert_true (cancellable == g_task_get_cancellable (task));
run_task_id = GPOINTER_TO_UINT (g_task_get_task_data (task));
if (run_task_id != 0)
g_source_remove (run_task_id);
g_task_return_boolean (task, FALSE);
g_assert_false (g_task_get_completed (task));
}
static gboolean
asynchronous_cancellation_run_task (gpointer user_data)
{
GCancellable *cancellable;
GTask *task = G_TASK (user_data);
cancellable = g_task_get_cancellable (task);
g_assert_true (G_IS_CANCELLABLE (cancellable));
g_assert_false (g_cancellable_is_cancelled (cancellable));
g_task_set_task_data (task, GUINT_TO_POINTER (0), NULL);
return G_SOURCE_REMOVE;
}
/* Test that cancellation is always asynchronous. The completion callback for
* a #GTask must not be called from inside the cancellation handler. */
static void
test_asynchronous_cancellation (void)
{
guint i;
g_test_bug ("https://gitlab.gnome.org/GNOME/glib/issues/1608");
/* Run a few times to shake out any timing issues between the
* cancellation and task sources.
*/
for (i = 0; i < 5; i++)
{
GCancellable *cancellable;
GTask *task;
gboolean notification_emitted = FALSE;
guint run_task_id;
cancellable = g_cancellable_new ();
task = g_task_new (NULL, cancellable, asynchronous_cancellation_callback, NULL);
g_cancellable_connect (cancellable, (GCallback) asynchronous_cancellation_cancelled, task, NULL);
g_signal_connect (task, "notify::completed", (GCallback) completed_cb, &notification_emitted);
run_task_id = g_idle_add (asynchronous_cancellation_run_task, task);
g_source_set_name_by_id (run_task_id, "[test_asynchronous_cancellation] run_task");
g_task_set_task_data (task, GUINT_TO_POINTER (run_task_id), NULL);
g_timeout_add (50, asynchronous_cancellation_cancel_task, task);
g_main_loop_run (loop);
g_assert_true (g_task_get_completed (task));
g_assert_true (notification_emitted);
g_object_unref (cancellable);
g_object_unref (task);
}
}
/* test_check_cancellable: cancellation overrides return value */
enum {
CANCEL_BEFORE = (1 << 1),
CANCEL_AFTER = (1 << 2),
CHECK_CANCELLABLE = (1 << 3)
};
#define NUM_CANCEL_TESTS (CANCEL_BEFORE | CANCEL_AFTER | CHECK_CANCELLABLE)
static void
cancel_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
int state = GPOINTER_TO_INT (user_data);
GTask *task;
GCancellable *cancellable;
GError *error = NULL;
g_assert (object == NULL);
g_assert (g_task_is_valid (result, object));
g_assert (g_async_result_get_user_data (result) == user_data);
task = G_TASK (result);
cancellable = g_task_get_cancellable (task);
g_assert (G_IS_CANCELLABLE (cancellable));
if (state & (CANCEL_BEFORE | CANCEL_AFTER))
g_assert (g_cancellable_is_cancelled (cancellable));
else
g_assert (!g_cancellable_is_cancelled (cancellable));
if (state & CHECK_CANCELLABLE)
g_assert (g_task_get_check_cancellable (task));
else
g_assert (!g_task_get_check_cancellable (task));
if (g_task_propagate_boolean (task, &error))
{
g_assert (!g_cancellable_is_cancelled (cancellable) ||
!g_task_get_check_cancellable (task));
}
else
{
g_assert (g_cancellable_is_cancelled (cancellable) &&
g_task_get_check_cancellable (task));
g_assert_error (error, G_IO_ERROR, G_IO_ERROR_CANCELLED);
g_error_free (error);
}
g_main_loop_quit (loop);
}
static void
test_check_cancellable (void)
{
GTask *task;
GCancellable *cancellable;
int state;
cancellable = g_cancellable_new ();
for (state = 0; state <= NUM_CANCEL_TESTS; state++)
{
task = g_task_new (NULL, cancellable, cancel_callback,
GINT_TO_POINTER (state));
g_task_set_check_cancellable (task, (state & CHECK_CANCELLABLE) != 0);
if (state & CANCEL_BEFORE)
g_cancellable_cancel (cancellable);
g_task_return_boolean (task, TRUE);
if (state & CANCEL_AFTER)
g_cancellable_cancel (cancellable);
g_main_loop_run (loop);
g_object_unref (task);
g_cancellable_reset (cancellable);
}
g_object_unref (cancellable);
}
/* test_return_if_cancelled */
static void
return_if_cancelled_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
GError *error = NULL;
g_assert (object == NULL);
g_assert (g_task_is_valid (result, object));
g_assert (g_async_result_get_user_data (result) == user_data);
g_assert (g_task_had_error (G_TASK (result)));
g_assert_false (g_task_get_completed (G_TASK (result)));
g_task_propagate_boolean (G_TASK (result), &error);
g_assert_error (error, G_IO_ERROR, G_IO_ERROR_CANCELLED);
g_clear_error (&error);
g_assert (g_task_had_error (G_TASK (result)));
g_main_loop_quit (loop);
}
static void
test_return_if_cancelled (void)
{
GTask *task;
GCancellable *cancellable;
gboolean cancelled;
gboolean notification_emitted = FALSE;
cancellable = g_cancellable_new ();
task = g_task_new (NULL, cancellable, return_if_cancelled_callback, NULL);
g_signal_connect (task, "notify::completed",
(GCallback) completed_cb, &notification_emitted);
g_cancellable_cancel (cancellable);
cancelled = g_task_return_error_if_cancelled (task);
g_assert (cancelled);
g_assert_false (notification_emitted);
g_main_loop_run (loop);
g_object_unref (task);
g_assert_true (notification_emitted);
g_cancellable_reset (cancellable);
notification_emitted = FALSE;
task = g_task_new (NULL, cancellable, return_if_cancelled_callback, NULL);
g_signal_connect (task, "notify::completed",
(GCallback) completed_cb, &notification_emitted);
g_task_set_check_cancellable (task, FALSE);
g_cancellable_cancel (cancellable);
cancelled = g_task_return_error_if_cancelled (task);
g_assert (cancelled);
g_assert_false (notification_emitted);
g_main_loop_run (loop);
g_object_unref (task);
g_assert_true (notification_emitted);
g_object_unref (cancellable);
}
/* test_run_in_thread */
static GMutex run_in_thread_mutex;
static GCond run_in_thread_cond;
static void
task_weak_notify (gpointer user_data,
GObject *ex_task)
{
gboolean *weak_notify_ran = user_data;
g_mutex_lock (&run_in_thread_mutex);
*weak_notify_ran = TRUE;
g_cond_signal (&run_in_thread_cond);
g_mutex_unlock (&run_in_thread_mutex);
}
static void
run_in_thread_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
gboolean *done = user_data;
GError *error = NULL;
gssize ret;
g_assert (g_thread_self () == main_thread);
g_assert (object == NULL);
g_assert (g_task_is_valid (result, object));
g_assert (g_async_result_get_user_data (result) == user_data);
g_assert (!g_task_had_error (G_TASK (result)));
g_assert_false (g_task_get_completed (G_TASK (result)));
g_assert_cmpstr (g_task_get_name (G_TASK (result)), ==, "test_run_in_thread name");
ret = g_task_propagate_int (G_TASK (result), &error);
g_assert_no_error (error);
g_assert_cmpint (ret, ==, magic);
g_assert (!g_task_had_error (G_TASK (result)));
*done = TRUE;
g_main_loop_quit (loop);
}
static void
run_in_thread_thread (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
gboolean *thread_ran = task_data;
g_assert (source_object == g_task_get_source_object (task));
g_assert (task_data == g_task_get_task_data (task));
g_assert (cancellable == g_task_get_cancellable (task));
g_assert_false (g_task_get_completed (task));
g_assert_cmpstr (g_task_get_name (task), ==, "test_run_in_thread name");
g_assert (g_thread_self () != main_thread);
g_mutex_lock (&run_in_thread_mutex);
*thread_ran = TRUE;
g_cond_signal (&run_in_thread_cond);
g_mutex_unlock (&run_in_thread_mutex);
g_task_return_int (task, magic);
}
static void
test_run_in_thread (void)
{
GTask *task;
volatile gboolean thread_ran = FALSE;
volatile gboolean weak_notify_ran = FALSE;
gboolean notification_emitted = FALSE;
gboolean done = FALSE;
task = g_task_new (NULL, NULL, run_in_thread_callback, &done);
g_task_set_name (task, "test_run_in_thread name");
g_object_weak_ref (G_OBJECT (task), task_weak_notify, (gpointer)&weak_notify_ran);
g_signal_connect (task, "notify::completed",
(GCallback) completed_cb, &notification_emitted);
g_task_set_task_data (task, (gpointer)&thread_ran, NULL);
g_task_run_in_thread (task, run_in_thread_thread);
g_mutex_lock (&run_in_thread_mutex);
while (!thread_ran)
g_cond_wait (&run_in_thread_cond, &run_in_thread_mutex);
g_mutex_unlock (&run_in_thread_mutex);
g_assert (done == FALSE);
g_assert (weak_notify_ran == FALSE);
g_main_loop_run (loop);
g_assert (done == TRUE);
g_assert_true (notification_emitted);
g_assert_cmpstr (g_task_get_name (task), ==, "test_run_in_thread name");
g_object_unref (task);
g_mutex_lock (&run_in_thread_mutex);
while (!weak_notify_ran)
g_cond_wait (&run_in_thread_cond, &run_in_thread_mutex);
g_mutex_unlock (&run_in_thread_mutex);
}
/* test_run_in_thread_sync */
static void
run_in_thread_sync_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
/* g_task_run_in_thread_sync() does not invoke the task's callback */
g_assert_not_reached ();
}
static void
run_in_thread_sync_thread (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
gboolean *thread_ran = task_data;
g_assert (source_object == g_task_get_source_object (task));
g_assert (task_data == g_task_get_task_data (task));
g_assert (cancellable == g_task_get_cancellable (task));
g_assert_false (g_task_get_completed (task));
g_assert (g_thread_self () != main_thread);
*thread_ran = TRUE;
g_task_return_int (task, magic);
}
static void
test_run_in_thread_sync (void)
{
GTask *task;
gboolean thread_ran = FALSE;
gssize ret;
gboolean notification_emitted = FALSE;
GError *error = NULL;
task = g_task_new (NULL, NULL, run_in_thread_sync_callback, NULL);
g_signal_connect (task, "notify::completed",
(GCallback) completed_cb,
&notification_emitted);
g_task_set_task_data (task, &thread_ran, NULL);
g_task_run_in_thread_sync (task, run_in_thread_sync_thread);
g_assert (thread_ran == TRUE);
g_assert (task != NULL);
g_assert (!g_task_had_error (task));
g_assert_true (g_task_get_completed (task));
g_assert_true (notification_emitted);
ret = g_task_propagate_int (task, &error);
g_assert_no_error (error);
g_assert_cmpint (ret, ==, magic);
g_assert (!g_task_had_error (task));
g_object_unref (task);
}
/* test_run_in_thread_priority */
static GMutex fake_task_mutex, last_fake_task_mutex;
static gint sequence_number = 0;
static void
quit_main_loop_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
GError *error = NULL;
gboolean ret;
g_assert (g_thread_self () == main_thread);
g_assert (object == NULL);
g_assert (g_task_is_valid (result, object));
g_assert (g_async_result_get_user_data (result) == user_data);
g_assert (!g_task_had_error (G_TASK (result)));
g_assert_false (g_task_get_completed (G_TASK (result)));
ret = g_task_propagate_boolean (G_TASK (result), &error);
g_assert_no_error (error);
g_assert_cmpint (ret, ==, TRUE);
g_assert (!g_task_had_error (G_TASK (result)));
g_main_loop_quit (loop);
}
static void
set_sequence_number_thread (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
gint *seq_no_p = task_data;
*seq_no_p = ++sequence_number;
g_task_return_boolean (task, TRUE);
}
static void
fake_task_thread (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
GMutex *mutex = task_data;
g_mutex_lock (mutex);
g_mutex_unlock (mutex);
g_task_return_boolean (task, TRUE);
}
#define G_TASK_THREAD_POOL_SIZE 10
static int fake_tasks_running;
static void
fake_task_callback (GObject *source,
GAsyncResult *result,
gpointer user_data)
{
if (--fake_tasks_running == 0)
g_main_loop_quit (loop);
}
static void
clog_up_thread_pool (void)
{
GTask *task;
int i;
g_thread_pool_stop_unused_threads ();
g_mutex_lock (&fake_task_mutex);
for (i = 0; i < G_TASK_THREAD_POOL_SIZE - 1; i++)
{
task = g_task_new (NULL, NULL, fake_task_callback, NULL);
g_task_set_task_data (task, &fake_task_mutex, NULL);
g_assert_cmpint (g_task_get_priority (task), ==, G_PRIORITY_DEFAULT);
g_task_set_priority (task, G_PRIORITY_HIGH * 2);
g_assert_cmpint (g_task_get_priority (task), ==, G_PRIORITY_HIGH * 2);
g_task_run_in_thread (task, fake_task_thread);
g_object_unref (task);
fake_tasks_running++;
}
g_mutex_lock (&last_fake_task_mutex);
task = g_task_new (NULL, NULL, NULL, NULL);
g_task_set_task_data (task, &last_fake_task_mutex, NULL);
g_task_set_priority (task, G_PRIORITY_HIGH * 2);
g_task_run_in_thread (task, fake_task_thread);
g_object_unref (task);
}
static void
unclog_thread_pool (void)
{
g_mutex_unlock (&fake_task_mutex);
g_main_loop_run (loop);
}
static void
test_run_in_thread_priority (void)
{
GTask *task;
GCancellable *cancellable;
int seq_a, seq_b, seq_c, seq_d;
clog_up_thread_pool ();
/* Queue three more tasks that we'll arrange to have run serially */
task = g_task_new (NULL, NULL, NULL, NULL);
g_task_set_task_data (task, &seq_a, NULL);
g_task_run_in_thread (task, set_sequence_number_thread);
g_object_unref (task);
task = g_task_new (NULL, NULL, quit_main_loop_callback, NULL);
g_task_set_task_data (task, &seq_b, NULL);
g_task_set_priority (task, G_PRIORITY_LOW);
g_task_run_in_thread (task, set_sequence_number_thread);
g_object_unref (task);
task = g_task_new (NULL, NULL, NULL, NULL);
g_task_set_task_data (task, &seq_c, NULL);
g_task_set_priority (task, G_PRIORITY_HIGH);
g_task_run_in_thread (task, set_sequence_number_thread);
g_object_unref (task);
cancellable = g_cancellable_new ();
task = g_task_new (NULL, cancellable, NULL, NULL);
g_task_set_task_data (task, &seq_d, NULL);
g_task_run_in_thread (task, set_sequence_number_thread);
g_cancellable_cancel (cancellable);
g_object_unref (cancellable);
g_object_unref (task);
/* Let the last fake task complete; the four other tasks will then
* complete serially, in the order D, C, A, B, and B will quit the
* main loop.
*/
g_mutex_unlock (&last_fake_task_mutex);
g_main_loop_run (loop);
g_assert_cmpint (seq_d, ==, 1);
g_assert_cmpint (seq_c, ==, 2);
g_assert_cmpint (seq_a, ==, 3);
g_assert_cmpint (seq_b, ==, 4);
unclog_thread_pool ();
}
/* test_run_in_thread_nested: task threads that block waiting on
* other task threads will not cause the thread pool to starve.
*/
static void
run_nested_task_thread (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
GTask *nested;
int *nested_tasks_left = task_data;
if ((*nested_tasks_left)--)
{
nested = g_task_new (NULL, NULL, NULL, NULL);
g_task_set_task_data (nested, nested_tasks_left, NULL);
g_task_run_in_thread_sync (nested, run_nested_task_thread);
g_object_unref (nested);
}
g_task_return_boolean (task, TRUE);
}
static void
test_run_in_thread_nested (void)
{
GTask *task;
int nested_tasks_left = 2;
clog_up_thread_pool ();
task = g_task_new (NULL, NULL, quit_main_loop_callback, NULL);
g_task_set_task_data (task, &nested_tasks_left, NULL);
g_task_run_in_thread (task, run_nested_task_thread);
g_object_unref (task);
g_mutex_unlock (&last_fake_task_mutex);
g_main_loop_run (loop);
unclog_thread_pool ();
}
/* test_run_in_thread_overflow: if you queue lots and lots and lots of
* tasks, they won't all run at once.
*/
static GMutex overflow_mutex;
static void
run_overflow_task_thread (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
gchar *result = task_data;
if (g_task_return_error_if_cancelled (task))
{
*result = 'X';
return;
}
/* Block until the main thread is ready. */
g_mutex_lock (&overflow_mutex);
g_mutex_unlock (&overflow_mutex);
*result = '.';
g_task_return_boolean (task, TRUE);
}
#define NUM_OVERFLOW_TASKS 1024
static void
test_run_in_thread_overflow (void)
{
GCancellable *cancellable;
GTask *task;
gchar buf[NUM_OVERFLOW_TASKS + 1];
gint i;
/* Queue way too many tasks and then sleep for a bit. The first 10
* tasks will be dispatched to threads and will then block on
* overflow_mutex, so more threads will be created while this thread
* is sleeping. Then we cancel the cancellable, unlock the mutex,
* wait for all of the tasks to complete, and make sure that we got
* the behavior we expected.
*/
memset (buf, 0, sizeof (buf));
cancellable = g_cancellable_new ();
g_mutex_lock (&overflow_mutex);
for (i = 0; i < NUM_OVERFLOW_TASKS; i++)
{
task = g_task_new (NULL, cancellable, NULL, NULL);
g_task_set_task_data (task, buf + i, NULL);
g_task_run_in_thread (task, run_overflow_task_thread);
g_object_unref (task);
}
if (g_test_slow ())
g_usleep (5000000); /* 5 s */
else
g_usleep (500000); /* 0.5 s */
g_cancellable_cancel (cancellable);
g_object_unref (cancellable);
g_mutex_unlock (&overflow_mutex);
/* Wait for all tasks to complete. */
while (strlen (buf) != NUM_OVERFLOW_TASKS)
g_usleep (1000);
i = strspn (buf, ".");
/* Given the sleep times above, i should be 14 for normal, 40 for
* slow. But if the machine is too slow/busy then the scheduling
* might get messed up and we'll get more or fewer threads than
* expected. But there are limits to how messed up it could
* plausibly get (and we hope that if gtask is actually broken then
* it will exceed those limits).
*/
g_assert_cmpint (i, >=, 10);
if (g_test_slow ())
g_assert_cmpint (i, <, 50);
else
g_assert_cmpint (i, <, 20);
g_assert_cmpint (i + strspn (buf + i, "X"), ==, NUM_OVERFLOW_TASKS);
}
/* test_return_on_cancel */
GMutex roc_init_mutex, roc_finish_mutex;
GCond roc_init_cond, roc_finish_cond;
typedef enum {
THREAD_STARTING,
THREAD_RUNNING,
THREAD_CANCELLED,
THREAD_COMPLETED
} ThreadState;
static void
return_on_cancel_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
gboolean *callback_ran = user_data;
GError *error = NULL;
gssize ret;
g_assert (g_thread_self () == main_thread);
g_assert (object == NULL);
g_assert (g_task_is_valid (result, object));
g_assert (g_async_result_get_user_data (result) == user_data);
g_assert (g_task_had_error (G_TASK (result)));
g_assert_false (g_task_get_completed (G_TASK (result)));
ret = g_task_propagate_int (G_TASK (result), &error);
g_assert_error (error, G_IO_ERROR, G_IO_ERROR_CANCELLED);
g_clear_error (&error);
g_assert_cmpint (ret, ==, -1);
g_assert (g_task_had_error (G_TASK (result)));
*callback_ran = TRUE;
g_main_loop_quit (loop);
}
static void
return_on_cancel_thread (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
ThreadState *state = task_data;
g_assert (source_object == g_task_get_source_object (task));
g_assert (task_data == g_task_get_task_data (task));
g_assert (cancellable == g_task_get_cancellable (task));
g_assert (g_thread_self () != main_thread);
g_mutex_lock (&roc_init_mutex);
*state = THREAD_RUNNING;
g_cond_signal (&roc_init_cond);
g_mutex_unlock (&roc_init_mutex);
g_mutex_lock (&roc_finish_mutex);
if (!g_task_get_return_on_cancel (task) ||
g_task_set_return_on_cancel (task, FALSE))
{
*state = THREAD_COMPLETED;
g_task_return_int (task, magic);
}
else
*state = THREAD_CANCELLED;
g_cond_signal (&roc_finish_cond);
g_mutex_unlock (&roc_finish_mutex);
}
static void
test_return_on_cancel (void)
{
GTask *task;
GCancellable *cancellable;
volatile ThreadState thread_state;
volatile gboolean weak_notify_ran = FALSE;
gboolean callback_ran;
gboolean notification_emitted = FALSE;
cancellable = g_cancellable_new ();
/* If return-on-cancel is FALSE (default), the task does not return
* early.
*/
callback_ran = FALSE;
thread_state = THREAD_STARTING;
task = g_task_new (NULL, cancellable, return_on_cancel_callback, &callback_ran);
g_signal_connect (task, "notify::completed",
(GCallback) completed_cb, &notification_emitted);
g_task_set_task_data (task, (gpointer)&thread_state, NULL);
g_mutex_lock (&roc_init_mutex);
g_mutex_lock (&roc_finish_mutex);
g_task_run_in_thread (task, return_on_cancel_thread);
g_object_unref (task);
while (thread_state == THREAD_STARTING)
g_cond_wait (&roc_init_cond, &roc_init_mutex);
g_mutex_unlock (&roc_init_mutex);
g_assert (thread_state == THREAD_RUNNING);
g_assert (callback_ran == FALSE);
g_cancellable_cancel (cancellable);
g_mutex_unlock (&roc_finish_mutex);
g_main_loop_run (loop);
g_assert (thread_state == THREAD_COMPLETED);
g_assert (callback_ran == TRUE);
g_assert_true (notification_emitted);
g_cancellable_reset (cancellable);
/* If return-on-cancel is TRUE, it does return early */
callback_ran = FALSE;
notification_emitted = FALSE;
thread_state = THREAD_STARTING;
task = g_task_new (NULL, cancellable, return_on_cancel_callback, &callback_ran);
g_object_weak_ref (G_OBJECT (task), task_weak_notify, (gpointer)&weak_notify_ran);
g_signal_connect (task, "notify::completed",
(GCallback) completed_cb, &notification_emitted);
g_task_set_return_on_cancel (task, TRUE);
g_task_set_task_data (task, (gpointer)&thread_state, NULL);
g_mutex_lock (&roc_init_mutex);
g_mutex_lock (&roc_finish_mutex);
g_task_run_in_thread (task, return_on_cancel_thread);
g_object_unref (task);
while (thread_state == THREAD_STARTING)
g_cond_wait (&roc_init_cond, &roc_init_mutex);
g_mutex_unlock (&roc_init_mutex);
g_assert (thread_state == THREAD_RUNNING);
g_assert (callback_ran == FALSE);
g_cancellable_cancel (cancellable);
g_main_loop_run (loop);
g_assert (thread_state == THREAD_RUNNING);
g_assert (callback_ran == TRUE);
g_assert (weak_notify_ran == FALSE);
while (thread_state == THREAD_RUNNING)
g_cond_wait (&roc_finish_cond, &roc_finish_mutex);
g_mutex_unlock (&roc_finish_mutex);
g_assert (thread_state == THREAD_CANCELLED);
g_mutex_lock (&run_in_thread_mutex);
while (!weak_notify_ran)
g_cond_wait (&run_in_thread_cond, &run_in_thread_mutex);
g_mutex_unlock (&run_in_thread_mutex);
g_assert_true (notification_emitted);
g_cancellable_reset (cancellable);
/* If the task is already cancelled before it starts, it returns
* immediately, but the thread func still runs.
*/
callback_ran = FALSE;
notification_emitted = FALSE;
thread_state = THREAD_STARTING;
task = g_task_new (NULL, cancellable, return_on_cancel_callback, &callback_ran);
g_signal_connect (task, "notify::completed",
(GCallback) completed_cb, &notification_emitted);
g_task_set_return_on_cancel (task, TRUE);
g_cancellable_cancel (cancellable);
g_task_set_task_data (task, (gpointer)&thread_state, NULL);
g_mutex_lock (&roc_init_mutex);
g_mutex_lock (&roc_finish_mutex);
g_task_run_in_thread (task, return_on_cancel_thread);
g_object_unref (task);
g_main_loop_run (loop);
g_assert (callback_ran == TRUE);
while (thread_state == THREAD_STARTING)
g_cond_wait (&roc_init_cond, &roc_init_mutex);
g_mutex_unlock (&roc_init_mutex);
g_assert (thread_state == THREAD_RUNNING);
while (thread_state == THREAD_RUNNING)
g_cond_wait (&roc_finish_cond, &roc_finish_mutex);
g_mutex_unlock (&roc_finish_mutex);
g_assert (thread_state == THREAD_CANCELLED);
g_assert_true (notification_emitted);
g_object_unref (cancellable);
}
/* test_return_on_cancel_sync */
static gpointer
cancel_sync_runner_thread (gpointer task)
{
g_task_run_in_thread_sync (task, return_on_cancel_thread);
return NULL;
}
static void
test_return_on_cancel_sync (void)
{
GTask *task;
GCancellable *cancellable;
volatile ThreadState thread_state;
GThread *runner_thread;
gssize ret;
GError *error = NULL;
cancellable = g_cancellable_new ();
/* If return-on-cancel is FALSE, the task does not return early.
*/
thread_state = THREAD_STARTING;
task = g_task_new (NULL, cancellable, run_in_thread_sync_callback, NULL);
g_task_set_task_data (task, (gpointer)&thread_state, NULL);
g_mutex_lock (&roc_init_mutex);
g_mutex_lock (&roc_finish_mutex);
runner_thread = g_thread_new ("return-on-cancel-sync runner thread",
cancel_sync_runner_thread, task);
while (thread_state == THREAD_STARTING)
g_cond_wait (&roc_init_cond, &roc_init_mutex);
g_mutex_unlock (&roc_init_mutex);
g_assert (thread_state == THREAD_RUNNING);
g_cancellable_cancel (cancellable);
g_mutex_unlock (&roc_finish_mutex);
g_thread_join (runner_thread);
g_assert (thread_state == THREAD_COMPLETED);
ret = g_task_propagate_int (task, &error);
g_assert_error (error, G_IO_ERROR, G_IO_ERROR_CANCELLED);
g_clear_error (&error);
g_assert_cmpint (ret, ==, -1);
g_object_unref (task);
g_cancellable_reset (cancellable);
/* If return-on-cancel is TRUE, it does return early */
thread_state = THREAD_STARTING;
task = g_task_new (NULL, cancellable, run_in_thread_sync_callback, NULL);
g_task_set_return_on_cancel (task, TRUE);
g_task_set_task_data (task, (gpointer)&thread_state, NULL);
g_mutex_lock (&roc_init_mutex);
g_mutex_lock (&roc_finish_mutex);
runner_thread = g_thread_new ("return-on-cancel-sync runner thread",
cancel_sync_runner_thread, task);
while (thread_state == THREAD_STARTING)
g_cond_wait (&roc_init_cond, &roc_init_mutex);
g_mutex_unlock (&roc_init_mutex);
g_assert (thread_state == THREAD_RUNNING);
g_cancellable_cancel (cancellable);
g_thread_join (runner_thread);
g_assert (thread_state == THREAD_RUNNING);
ret = g_task_propagate_int (task, &error);
g_assert_error (error, G_IO_ERROR, G_IO_ERROR_CANCELLED);
g_clear_error (&error);
g_assert_cmpint (ret, ==, -1);
g_object_unref (task);
while (thread_state == THREAD_RUNNING)
g_cond_wait (&roc_finish_cond, &roc_finish_mutex);
g_mutex_unlock (&roc_finish_mutex);
g_assert (thread_state == THREAD_CANCELLED);
g_cancellable_reset (cancellable);
/* If the task is already cancelled before it starts, it returns
* immediately, but the thread func still runs.
*/
thread_state = THREAD_STARTING;
task = g_task_new (NULL, cancellable, run_in_thread_sync_callback, NULL);
g_task_set_return_on_cancel (task, TRUE);
g_cancellable_cancel (cancellable);
g_task_set_task_data (task, (gpointer)&thread_state, NULL);
g_mutex_lock (&roc_init_mutex);
g_mutex_lock (&roc_finish_mutex);
runner_thread = g_thread_new ("return-on-cancel-sync runner thread",
cancel_sync_runner_thread, task);
g_thread_join (runner_thread);
g_assert (thread_state == THREAD_STARTING);
ret = g_task_propagate_int (task, &error);
g_assert_error (error, G_IO_ERROR, G_IO_ERROR_CANCELLED);
g_clear_error (&error);
g_assert_cmpint (ret, ==, -1);
g_object_unref (task);
while (thread_state == THREAD_STARTING)
g_cond_wait (&roc_init_cond, &roc_init_mutex);
g_mutex_unlock (&roc_init_mutex);
g_assert (thread_state == THREAD_RUNNING);
while (thread_state == THREAD_RUNNING)
g_cond_wait (&roc_finish_cond, &roc_finish_mutex);
g_mutex_unlock (&roc_finish_mutex);
g_assert (thread_state == THREAD_CANCELLED);
g_object_unref (cancellable);
}
/* test_return_on_cancel_atomic: turning return-on-cancel on/off is
* non-racy
*/
GMutex roca_mutex_1, roca_mutex_2;
GCond roca_cond_1, roca_cond_2;
static void
return_on_cancel_atomic_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
gboolean *callback_ran = user_data;
GError *error = NULL;
gssize ret;
g_assert (g_thread_self () == main_thread);
g_assert (object == NULL);
g_assert (g_task_is_valid (result, object));
g_assert (g_async_result_get_user_data (result) == user_data);
g_assert (g_task_had_error (G_TASK (result)));
g_assert_false (g_task_get_completed (G_TASK (result)));
ret = g_task_propagate_int (G_TASK (result), &error);
g_assert_error (error, G_IO_ERROR, G_IO_ERROR_CANCELLED);
g_clear_error (&error);
g_assert_cmpint (ret, ==, -1);
g_assert (g_task_had_error (G_TASK (result)));
*callback_ran = TRUE;
g_main_loop_quit (loop);
}
static void
return_on_cancel_atomic_thread (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
gint *state = task_data;
g_assert (source_object == g_task_get_source_object (task));
g_assert (task_data == g_task_get_task_data (task));
g_assert (cancellable == g_task_get_cancellable (task));
g_assert_false (g_task_get_completed (task));
g_assert (g_thread_self () != main_thread);
g_assert_cmpint (*state, ==, 0);
g_mutex_lock (&roca_mutex_1);
*state = 1;
g_cond_signal (&roca_cond_1);
g_mutex_unlock (&roca_mutex_1);
g_mutex_lock (&roca_mutex_2);
if (g_task_set_return_on_cancel (task, FALSE))
*state = 2;
else
*state = 3;
g_cond_signal (&roca_cond_2);
g_mutex_unlock (&roca_mutex_2);
g_mutex_lock (&roca_mutex_1);
if (g_task_set_return_on_cancel (task, TRUE))
*state = 4;
else
*state = 5;
g_cond_signal (&roca_cond_1);
g_mutex_unlock (&roca_mutex_1);
g_mutex_lock (&roca_mutex_2);
if (g_task_set_return_on_cancel (task, TRUE))
*state = 6;
else
*state = 7;
g_cond_signal (&roca_cond_2);
g_mutex_unlock (&roca_mutex_2);
g_task_return_int (task, magic);
}
static void
test_return_on_cancel_atomic (void)
{
GTask *task;
GCancellable *cancellable;
volatile gint state;
gboolean notification_emitted = FALSE;
gboolean callback_ran;
cancellable = g_cancellable_new ();
g_mutex_lock (&roca_mutex_1);
g_mutex_lock (&roca_mutex_2);
/* If we don't cancel it, each set_return_on_cancel() call will succeed */
state = 0;
callback_ran = FALSE;
task = g_task_new (NULL, cancellable, return_on_cancel_atomic_callback, &callback_ran);
g_task_set_return_on_cancel (task, TRUE);
g_signal_connect (task, "notify::completed",
(GCallback) completed_cb, &notification_emitted);
g_task_set_task_data (task, (gpointer)&state, NULL);
g_task_run_in_thread (task, return_on_cancel_atomic_thread);
g_object_unref (task);
g_assert_cmpint (state, ==, 0);
while (state == 0)
g_cond_wait (&roca_cond_1, &roca_mutex_1);
g_assert (state == 1);
while (state == 1)
g_cond_wait (&roca_cond_2, &roca_mutex_2);
g_assert (state == 2);
while (state == 2)
g_cond_wait (&roca_cond_1, &roca_mutex_1);
g_assert (state == 4);
while (state == 4)
g_cond_wait (&roca_cond_2, &roca_mutex_2);
g_assert (state == 6);
/* callback assumes there'll be a cancelled error */
g_cancellable_cancel (cancellable);
g_assert (callback_ran == FALSE);
g_main_loop_run (loop);
g_assert (callback_ran == TRUE);
g_assert_true (notification_emitted);
g_cancellable_reset (cancellable);
/* If we cancel while it's temporarily not return-on-cancel, the
* task won't complete right away, and further
* g_task_set_return_on_cancel() calls will return FALSE.
*/
state = 0;
callback_ran = FALSE;
notification_emitted = FALSE;
task = g_task_new (NULL, cancellable, return_on_cancel_atomic_callback, &callback_ran);
g_task_set_return_on_cancel (task, TRUE);
g_signal_connect (task, "notify::completed",
(GCallback) completed_cb, &notification_emitted);
g_task_set_task_data (task, (gpointer)&state, NULL);
g_task_run_in_thread (task, return_on_cancel_atomic_thread);
g_assert_cmpint (state, ==, 0);
while (state == 0)
g_cond_wait (&roca_cond_1, &roca_mutex_1);
g_assert (state == 1);
g_assert (g_task_get_return_on_cancel (task));
while (state == 1)
g_cond_wait (&roca_cond_2, &roca_mutex_2);
g_assert (state == 2);
g_assert (!g_task_get_return_on_cancel (task));
g_cancellable_cancel (cancellable);
g_idle_add (idle_quit_loop, NULL);
g_main_loop_run (loop);
g_assert (callback_ran == FALSE);
while (state == 2)
g_cond_wait (&roca_cond_1, &roca_mutex_1);
g_assert (state == 5);
g_assert (!g_task_get_return_on_cancel (task));
g_main_loop_run (loop);
g_assert (callback_ran == TRUE);
g_assert_true (notification_emitted);
while (state == 5)
g_cond_wait (&roca_cond_2, &roca_mutex_2);
g_assert (state == 7);
g_object_unref (cancellable);
g_mutex_unlock (&roca_mutex_1);
g_mutex_unlock (&roca_mutex_2);
g_object_unref (task);
}
/* test_return_pointer: memory management of pointer returns */
static void
test_return_pointer (void)
{
GObject *object, *ret;
GTask *task;
GCancellable *cancellable;
GError *error = NULL;
/* If we don't read back the return value, the task will
* run its destroy notify.
*/
object = (GObject *)g_dummy_object_new ();
g_assert_cmpint (object->ref_count, ==, 1);
g_object_add_weak_pointer (object, (gpointer *)&object);
task = g_task_new (NULL, NULL, NULL, NULL);
g_object_add_weak_pointer (G_OBJECT (task), (gpointer *)&task);
g_task_return_pointer (task, object, g_object_unref);
g_assert_cmpint (object->ref_count, ==, 1);
/* Task and object are reffed until the :completed notification in idle. */
g_object_unref (task);
g_assert_nonnull (task);
g_assert_nonnull (object);
wait_for_completed_notification (task);
g_assert_null (task);
g_assert_null (object);
/* Likewise, if the return value is overwritten by an error */
object = (GObject *)g_dummy_object_new ();
g_assert_cmpint (object->ref_count, ==, 1);
g_object_add_weak_pointer (object, (gpointer *)&object);
cancellable = g_cancellable_new ();
task = g_task_new (NULL, cancellable, NULL, NULL);
g_object_add_weak_pointer (G_OBJECT (task), (gpointer *)&task);
g_task_return_pointer (task, object, g_object_unref);
g_assert_cmpint (object->ref_count, ==, 1);
g_cancellable_cancel (cancellable);
g_assert_cmpint (object->ref_count, ==, 1);
ret = g_task_propagate_pointer (task, &error);
g_assert (ret == NULL);
g_assert_error (error, G_IO_ERROR, G_IO_ERROR_CANCELLED);
g_clear_error (&error);
g_assert_cmpint (object->ref_count, ==, 1);
g_object_unref (task);
g_object_unref (cancellable);
g_assert_nonnull (task);
g_assert_nonnull (object);
wait_for_completed_notification (task);
g_assert_null (task);
g_assert_null (object);
/* If we read back the return value, we steal its ref */
object = (GObject *)g_dummy_object_new ();
g_assert_cmpint (object->ref_count, ==, 1);
g_object_add_weak_pointer (object, (gpointer *)&object);
task = g_task_new (NULL, NULL, NULL, NULL);
g_object_add_weak_pointer (G_OBJECT (task), (gpointer *)&task);
g_task_return_pointer (task, object, g_object_unref);
g_assert_cmpint (object->ref_count, ==, 1);
ret = g_task_propagate_pointer (task, &error);
g_assert_no_error (error);
g_assert (ret == object);
g_assert_cmpint (object->ref_count, ==, 1);
g_object_unref (task);
g_assert_nonnull (task);
g_assert_cmpint (object->ref_count, ==, 1);
g_object_unref (object);
g_assert (object == NULL);
wait_for_completed_notification (task);
g_assert_null (task);
}
/* test_object_keepalive: GTask takes a ref on its source object */
static GObject *keepalive_object;
static void
keepalive_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
gssize *result_out = user_data;
GError *error = NULL;
g_assert (object == keepalive_object);
g_assert (g_task_is_valid (result, object));
g_assert (g_async_result_get_user_data (result) == user_data);
g_assert (!g_task_had_error (G_TASK (result)));
g_assert_false (g_task_get_completed (G_TASK (result)));
*result_out = g_task_propagate_int (G_TASK (result), &error);
g_assert_no_error (error);
g_assert (!g_task_had_error (G_TASK (result)));
g_main_loop_quit (loop);
}
static void
test_object_keepalive (void)
{
GObject *object;
GTask *task;
gssize result;
int ref_count;
gboolean notification_emitted = FALSE;
keepalive_object = object = (GObject *)g_dummy_object_new ();
g_object_add_weak_pointer (object, (gpointer *)&object);
task = g_task_new (object, NULL, keepalive_callback, &result);
g_object_add_weak_pointer (G_OBJECT (task), (gpointer *)&task);
g_signal_connect (task, "notify::completed",
(GCallback) completed_cb, &notification_emitted);
ref_count = object->ref_count;
g_assert_cmpint (ref_count, >, 1);
g_assert (g_task_get_source_object (task) == object);
g_assert (g_async_result_get_source_object (G_ASYNC_RESULT (task)) == object);
g_assert_cmpint (object->ref_count, ==, ref_count + 1);
g_object_unref (object);
g_object_unref (object);
g_assert (object != NULL);
g_task_return_int (task, magic);
g_main_loop_run (loop);
g_assert (object != NULL);
g_assert_cmpint (result, ==, magic);
g_assert_true (notification_emitted);
g_object_unref (task);
g_assert (task == NULL);
g_assert (object == NULL);
}
/* test_legacy_error: legacy GSimpleAsyncResult handling */
static void test_legacy_error (void);
static void
legacy_error_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
gssize *result_out = user_data;
GError *error = NULL;
g_assert (object == NULL);
g_assert (g_async_result_is_tagged (result, test_legacy_error));
g_assert (g_async_result_get_user_data (result) == user_data);
if (g_async_result_legacy_propagate_error (result, &error))
{
g_assert (!g_task_is_valid (result, object));
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
g_assert (g_simple_async_result_is_valid (result, object, test_legacy_error));
G_GNUC_END_IGNORE_DEPRECATIONS;
g_assert_error (error, G_IO_ERROR, G_IO_ERROR_FAILED);
*result_out = -2;
g_clear_error (&error);
}
else
{
g_assert (g_task_is_valid (result, object));
*result_out = g_task_propagate_int (G_TASK (result), NULL);
/* Might be error, might not */
}
g_main_loop_quit (loop);
}
static gboolean
legacy_error_return (gpointer user_data)
{
if (G_IS_TASK (user_data))
{
GTask *task = user_data;
g_task_return_int (task, magic);
g_object_unref (task);
}
else
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
g_simple_async_result_set_error (simple,
G_IO_ERROR,
G_IO_ERROR_FAILED,
"Failed");
g_simple_async_result_complete (simple);
G_GNUC_END_IGNORE_DEPRECATIONS;
g_object_unref (simple);
}
return FALSE;
}
static void
test_legacy_error (void)
{
GTask *task;
GSimpleAsyncResult *simple;
gssize result;
/* GTask success */
task = g_task_new (NULL, NULL, legacy_error_callback, &result);
g_task_set_source_tag (task, test_legacy_error);
g_object_add_weak_pointer (G_OBJECT (task), (gpointer *)&task);
g_idle_add (legacy_error_return, task);
g_main_loop_run (loop);
g_assert_cmpint (result, ==, magic);
g_assert (task == NULL);
/* GTask error */
task = g_task_new (NULL, NULL, legacy_error_callback, &result);
g_task_set_source_tag (task, test_legacy_error);
g_object_add_weak_pointer (G_OBJECT (task), (gpointer *)&task);
g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED,
"Failed");
g_object_unref (task);
g_main_loop_run (loop);
g_assert_cmpint (result, ==, -1);
g_assert (task == NULL);
/* GSimpleAsyncResult error */
G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
simple = g_simple_async_result_new (NULL, legacy_error_callback, &result,
test_legacy_error);
G_GNUC_END_IGNORE_DEPRECATIONS;
g_object_add_weak_pointer (G_OBJECT (simple), (gpointer *)&simple);
g_idle_add (legacy_error_return, simple);
g_main_loop_run (loop);
g_assert_cmpint (result, ==, -2);
g_assert (simple == NULL);
}
/* Various helper functions for the return tests below. */
static void
task_complete_cb (GObject *source,
GAsyncResult *result,
gpointer user_data)
{
GTask *task = G_TASK (result);
guint *calls = user_data;
g_assert_cmpint (++*calls, <=, 1);
/* Propagate the result, so it’s removed from the task’s internal state. */
g_task_propagate_boolean (task, NULL);
}
static void
return_twice (GTask *task)
{
gboolean error_first = GPOINTER_TO_UINT (g_task_get_task_data (task));
if (error_first)
{
g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_UNKNOWN, "oh no");
g_task_return_boolean (task, TRUE);
}
else
{
g_task_return_boolean (task, TRUE);
g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_UNKNOWN, "oh no");
}
}
static gboolean
idle_cb (gpointer user_data)
{
GTask *task = user_data;
return_twice (task);
g_object_unref (task);
return G_SOURCE_REMOVE;
}
static void
test_return_permutation (gboolean error_first,
gboolean return_in_idle)
{
guint calls = 0;
GTask *task = NULL;
g_test_bug ("https://gitlab.gnome.org/GNOME/glib/issues/1525");
task = g_task_new (NULL, NULL, task_complete_cb, &calls);
g_task_set_task_data (task, GUINT_TO_POINTER (error_first), NULL);
if (return_in_idle)
g_idle_add (idle_cb, g_object_ref (task));
else
return_twice (task);
while (calls == 0)
g_main_context_iteration (NULL, TRUE);
g_assert_cmpint (calls, ==, 1);
g_object_unref (task);
}
/* Test that calling g_task_return_boolean() after g_task_return_error(), when
* returning in an idle callback, correctly results in a critical warning. */
static void
test_return_in_idle_error_first (void)
{
if (g_test_subprocess ())
{
test_return_permutation (TRUE, TRUE);
return;
}
g_test_trap_subprocess (NULL, 0, 0);
g_test_trap_assert_failed ();
g_test_trap_assert_stderr ("*CRITICAL*assertion '!task->ever_returned' failed*");
}
/* Test that calling g_task_return_error() after g_task_return_boolean(), when
* returning in an idle callback, correctly results in a critical warning. */
static void
test_return_in_idle_value_first (void)
{
if (g_test_subprocess ())
{
test_return_permutation (FALSE, TRUE);
return;
}
g_test_trap_subprocess (NULL, 0, 0);
g_test_trap_assert_failed ();
g_test_trap_assert_stderr ("*CRITICAL*assertion '!task->ever_returned' failed*");
}
/* Test that calling g_task_return_boolean() after g_task_return_error(), when
* returning synchronously, correctly results in a critical warning. */
static void
test_return_error_first (void)
{
if (g_test_subprocess ())
{
test_return_permutation (TRUE, FALSE);
return;
}
g_test_trap_subprocess (NULL, 0, 0);
g_test_trap_assert_failed ();
g_test_trap_assert_stderr ("*CRITICAL*assertion '!task->ever_returned' failed*");
}
/* Test that calling g_task_return_error() after g_task_return_boolean(), when
* returning synchronously, correctly results in a critical warning. */
static void
test_return_value_first (void)
{
if (g_test_subprocess ())
{
test_return_permutation (FALSE, FALSE);
return;
}
g_test_trap_subprocess (NULL, 0, 0);
g_test_trap_assert_failed ();
g_test_trap_assert_stderr ("*CRITICAL*assertion '!task->ever_returned' failed*");
}
int
main (int argc, char **argv)
{
int ret;
g_test_init (&argc, &argv, NULL);
g_test_bug_base ("");
loop = g_main_loop_new (NULL, FALSE);
main_thread = g_thread_self ();
magic = g_get_monotonic_time ();
g_test_add_func ("/gtask/basic", test_basic);
g_test_add_func ("/gtask/error", test_error);
g_test_add_func ("/gtask/return-from-same-iteration", test_return_from_same_iteration);
g_test_add_func ("/gtask/return-from-toplevel", test_return_from_toplevel);
g_test_add_func ("/gtask/return-from-anon-thread", test_return_from_anon_thread);
g_test_add_func ("/gtask/return-from-wrong-thread", test_return_from_wrong_thread);
g_test_add_func ("/gtask/no-callback", test_no_callback);
g_test_add_func ("/gtask/report-error", test_report_error);
g_test_add_func ("/gtask/priority", test_priority);
g_test_add_func ("/gtask/name", test_name);
g_test_add_func ("/gtask/asynchronous-cancellation", test_asynchronous_cancellation);
g_test_add_func ("/gtask/check-cancellable", test_check_cancellable);
g_test_add_func ("/gtask/return-if-cancelled", test_return_if_cancelled);
g_test_add_func ("/gtask/run-in-thread", test_run_in_thread);
g_test_add_func ("/gtask/run-in-thread-sync", test_run_in_thread_sync);
g_test_add_func ("/gtask/run-in-thread-priority", test_run_in_thread_priority);
g_test_add_func ("/gtask/run-in-thread-nested", test_run_in_thread_nested);
g_test_add_func ("/gtask/run-in-thread-overflow", test_run_in_thread_overflow);
g_test_add_func ("/gtask/return-on-cancel", test_return_on_cancel);
g_test_add_func ("/gtask/return-on-cancel-sync", test_return_on_cancel_sync);
g_test_add_func ("/gtask/return-on-cancel-atomic", test_return_on_cancel_atomic);
g_test_add_func ("/gtask/return-pointer", test_return_pointer);
g_test_add_func ("/gtask/object-keepalive", test_object_keepalive);
g_test_add_func ("/gtask/legacy-error", test_legacy_error);
g_test_add_func ("/gtask/return/in-idle/error-first", test_return_in_idle_error_first);
g_test_add_func ("/gtask/return/in-idle/value-first", test_return_in_idle_value_first);
g_test_add_func ("/gtask/return/error-first", test_return_error_first);
g_test_add_func ("/gtask/return/value-first", test_return_value_first);
ret = g_test_run();
g_main_loop_unref (loop);
return ret;
}
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