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shell/util: Add touch_file_async() helper

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Add a small helper method to asynchronously "touch" a file and return
whether the file was created or not.

As g_file_make_directory_with_parents() doesn't have an async variant,
we need a C helper to make the entire operation non-blocking.

https://gitlab.gnome.org/GNOME/gnome-shell/issues/2432
This commit is contained in:
Florian Müllner 2020-03-23 17:57:38 +01:00 committed by Florian Müllner
parent e6a814fac8
commit f52574bd28
2 changed files with 69 additions and 0 deletions
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62
src/shell-util.c
View File

@ -291,6 +291,68 @@ shell_get_file_contents_utf8_sync (const char *path,
return contents;
}
static void
touch_file (GTask *task,
gpointer object,
gpointer task_data,
GCancellable *cancellable)
{
GFile *file = object;
g_autoptr (GFile) parent = NULL;
g_autoptr (GFileOutputStream) stream = NULL;
GError *error = NULL;
parent = g_file_get_parent (file);
g_file_make_directory_with_parents (parent, cancellable, &error);
if (error && !g_error_matches (error, G_IO_ERROR, G_IO_ERROR_EXISTS))
{
g_task_return_error (task, error);
return;
}
g_clear_error (&error);
stream = g_file_create (file, G_FILE_CREATE_NONE, cancellable, &error);
if (error && !g_error_matches (error, G_IO_ERROR, G_IO_ERROR_EXISTS))
{
g_task_return_error (task, error);
return;
}
g_clear_error (&error);
if (stream)
g_output_stream_close (G_OUTPUT_STREAM (stream), NULL, NULL);
g_task_return_boolean (task, stream != NULL);
}
void
shell_util_touch_file_async (GFile *file,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_autoptr (GTask) task = NULL;
g_return_if_fail (G_IS_FILE (file));
task = g_task_new (file, NULL, callback, user_data);
g_task_set_source_tag (task, shell_util_touch_file_async);
g_task_run_in_thread (task, touch_file);
}
gboolean
shell_util_touch_file_finish (GFile *file,
GAsyncResult *res,
GError **error)
{
g_return_val_if_fail (G_IS_FILE (file), FALSE);
g_return_val_if_fail (G_IS_TASK (res), FALSE);
return g_task_propagate_boolean (G_TASK (res), error);
}
/**
* shell_util_wifexited:
* @status: the status returned by wait() or waitpid()

7
src/shell-util.h
View File

@ -30,6 +30,13 @@ gboolean shell_write_string_to_stream (GOutputStream *stream,
char *shell_get_file_contents_utf8_sync (const char *path,
GError **error);
void shell_util_touch_file_async (GFile *file,
GAsyncReadyCallback callback,
gpointer user_data);
gboolean shell_util_touch_file_finish (GFile *file,
GAsyncResult *res,
GError **error);
gboolean shell_util_wifexited (int status,
int *exit);