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Merge branch 'wip/rishi/gtask-return-cancellation-test' into 'master'

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gio/tests/task: Run the worker indefinitely until it's cancelled

See merge request GNOME/glib!648
This commit is contained in:
Philip Withnall 2019-02-11 12:42:38 +00:00
commit 6199d8ba9f
1 changed files with 37 additions and 6 deletions
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43
gio/tests/task.c
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@ -1,5 +1,5 @@
/*
* Copyright 2012 Red Hat, Inc.
* Copyright 2012-2019 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
@ -657,14 +657,21 @@ name_callback (GObject *object,
/* test_asynchronous_cancellation: cancelled tasks are returned
* asynchronously, i.e. not from inside the GCancellable::cancelled
* handler.
*
* The test is set up further below in test_asynchronous_cancellation.
*/
/* asynchronous_cancellation_callback represents the callback that the
* caller of a typical asynchronous API would have passed. See
* test_asynchronous_cancellation.
*/
static void
asynchronous_cancellation_callback (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
GError *error = NULL;
guint run_task_id;
g_assert_null (object);
g_assert_true (g_task_is_valid (result, object));
@ -672,6 +679,9 @@ asynchronous_cancellation_callback (GObject *object,
g_assert_true (g_task_had_error (G_TASK (result)));
g_assert_false (g_task_get_completed (G_TASK (result)));
run_task_id = GPOINTER_TO_UINT (g_task_get_task_data (G_TASK (result)));
g_assert_cmpuint (run_task_id, ==, 0);
g_task_propagate_boolean (G_TASK (result), &error);
g_assert_error (error, G_IO_ERROR, G_IO_ERROR_CANCELLED);
g_clear_error (&error);
@ -681,6 +691,10 @@ asynchronous_cancellation_callback (GObject *object,
g_main_loop_quit (loop);
}
/* asynchronous_cancellation_cancel_task represents a user cancelling
* the ongoing operation. To make it somewhat realistic it is delayed
* by 50ms via a timeout GSource. See test_asynchronous_cancellation.
*/
static gboolean
asynchronous_cancellation_cancel_task (gpointer user_data)
{
@ -696,6 +710,10 @@ asynchronous_cancellation_cancel_task (gpointer user_data)
return G_SOURCE_REMOVE;
}
/* asynchronous_cancellation_cancelled is the GCancellable::cancelled
* handler that's used by the asynchronous implementation for
* cancelling itself.
*/
static void
asynchronous_cancellation_cancelled (GCancellable *cancellable,
gpointer user_data)
@ -706,13 +724,20 @@ asynchronous_cancellation_cancelled (GCancellable *cancellable,
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_assert_cmpuint (run_task_id, !=, 0);
g_source_remove (run_task_id);
g_task_set_task_data (task, GUINT_TO_POINTER (0), NULL);
g_task_return_boolean (task, FALSE);
g_assert_false (g_task_get_completed (task));
}
/* asynchronous_cancellation_run_task represents the actual
* asynchronous work being done in an idle GSource as was mentioned
* above. This is effectively meant to be an infinite loop so that
* the only way to break out of it is via cancellation.
*/
static gboolean
asynchronous_cancellation_run_task (gpointer user_data)
{
@ -723,12 +748,18 @@ asynchronous_cancellation_run_task (gpointer user_data)
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;
return G_SOURCE_CONTINUE;
}
/* Test that cancellation is always asynchronous. The completion callback for
* a #GTask must not be called from inside the cancellation handler. */
* a #GTask must not be called from inside the cancellation handler.
*
* The body of the loop inside test_asynchronous_cancellation
* represents what would have been a typical asynchronous API call,
* and its implementation. They are fused together without an API
* boundary. The actual work done by this asynchronous API is
* represented by an idle GSource.
*/
static void
test_asynchronous_cancellation (void)
{