[PATCH 1/1] telit: port mm-common-telit to use GTask
Daniele Palmas
dnlplm at gmail.com
Wed Jun 28 21:21:10 UTC 2017
HI Aleksander,
2017-06-28 18:44 GMT+02:00 Aleksander Morgado <aleksander at aleksander.es>:
> Hey Daniele,
>
> See comments below.
>
> On 28/06/17 16:07, Daniele Palmas wrote:
>> ---
>> plugins/telit/mm-common-telit.c | 64 +++++++++++++++++++----------------------
>> 1 file changed, 29 insertions(+), 35 deletions(-)
>>
>> diff --git a/plugins/telit/mm-common-telit.c b/plugins/telit/mm-common-telit.c
>> index 1e43588..cfd3292 100644
>> --- a/plugins/telit/mm-common-telit.c
>> +++ b/plugins/telit/mm-common-telit.c
>> @@ -120,10 +120,7 @@ out:
>> /* Custom init */
>>
>> typedef struct {
>> - MMPortProbe *probe;
>> MMPortSerialAt *port;
>> - GCancellable *cancellable;
>> - GSimpleAsyncResult *result;
>> gboolean getportcfg_done;
>> guint getportcfg_retries;
>> } TelitCustomInitContext;
>> @@ -133,10 +130,10 @@ telit_custom_init_finish (MMPortProbe *probe,
>> GAsyncResult *result,
>> GError **error)
>> {
>> - return !g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (result), error);
>> + return g_task_propagate_boolean (G_TASK (result), error);
>> }
>>
>> -static void telit_custom_init_step (TelitCustomInitContext *ctx);
>> +static void telit_custom_init_step (GTask *task);
>>
>> static gboolean
>> cache_port_mode (MMDevice *device,
>> @@ -217,10 +214,15 @@ out:
>> static void
>> getportcfg_ready (MMPortSerialAt *port,
>> GAsyncResult *res,
>> - TelitCustomInitContext *ctx)
>> + GTask *task)
>> {
>> const gchar *response;
>> GError *error = NULL;
>> + MMPortProbe *probe;
>> + TelitCustomInitContext *ctx;
>> +
>> + ctx = g_task_get_task_data (task);
>> + probe = g_task_get_source_object (task);
>>
>> response = mm_port_serial_at_command_finish (port, res, &error);
>> if (error) {
>> @@ -237,7 +239,7 @@ getportcfg_ready (MMPortSerialAt *port,
>> } else {
>> MMDevice *device;
>>
>> - device = mm_port_probe_peek_device (ctx->probe);
>> + device = mm_port_probe_peek_device (probe);
>>
>> /* Results are cached in the parent device object */
>> if (g_object_get_data (G_OBJECT (device), TAG_GETPORTCFG_SUPPORTED) == NULL) {
>> @@ -249,35 +251,34 @@ getportcfg_ready (MMPortSerialAt *port,
>> }
>>
>> /* Port answered to #PORTCFG, so mark it as being AT already */
>> - mm_port_probe_set_result_at (ctx->probe, TRUE);
>> + mm_port_probe_set_result_at (probe, TRUE);
>> }
>>
>> if (error)
>> g_error_free (error);
>>
>> - telit_custom_init_step (ctx);
>> + telit_custom_init_step (task);
>> }
>>
>> static void
>> -telit_custom_init_context_complete_and_free (TelitCustomInitContext *ctx)
>> +telit_custom_init_context_free (TelitCustomInitContext *ctx)
>> {
>> - g_simple_async_result_complete_in_idle (ctx->result);
>> -
>> - if (ctx->cancellable)
>> - g_object_unref (ctx->cancellable);
>> g_object_unref (ctx->port);
>> - g_object_unref (ctx->probe);
>> - g_object_unref (ctx->result);
>> g_slice_free (TelitCustomInitContext, ctx);
>> }
>>
>> static void
>> -telit_custom_init_step (TelitCustomInitContext *ctx)
>> +telit_custom_init_step (GTask *task)
>> {
>> MMKernelDevice *port;
>> + MMPortProbe *probe;
>> + TelitCustomInitContext *ctx;
>> +
>> + ctx = g_task_get_task_data (task);
>> + probe = g_task_get_source_object (task);
>>
>> /* If cancelled, end */
>> - if (g_cancellable_is_cancelled (ctx->cancellable)) {
>> + if (g_task_return_error_if_cancelled (task)) {
>> mm_dbg ("telit: no need to keep on running custom init in (%s)",
>> mm_port_get_device (MM_PORT (ctx->port)));
>> goto out;
>
> This is not right. The g_task_return_error_if_cancelled() already does the GTask return, so you cannot "goto out" and try to g_task_return_boolean() again there. In this specific case we do want to return TRUE, so we should be checking manually the cancellable ourselves (i.e. without returning the GTask), with:
> if (g_cancellable_is_cancelled (g_task_get_cancellable ())) {
> ...
> }
>
> AND also, as we want the finish() method to return TRUE, we should also g_task_set_check_cancellable (task, FALSE) as soon as we create it. Otherwise, even if we return TRUE with g_task_return_boolean() the GTask would end up returning a cancellable error instead.
>
Thanks for the review, I will send a new version of the patch.
Regards,
Daniele
>
>> @@ -286,7 +287,7 @@ telit_custom_init_step (TelitCustomInitContext *ctx)
>> /* Try to get a port configuration from the modem: usb interface 00
>> * is always linked to an AT port
>> */
>> - port = mm_port_probe_peek_port (ctx->probe);
>> + port = mm_port_probe_peek_port (probe);
>> if (!ctx->getportcfg_done &&
>> g_strcmp0 (mm_kernel_device_get_property (port, "ID_USB_INTERFACE_NUM"), "00") == 0) {
>>
>> @@ -300,15 +301,15 @@ telit_custom_init_step (TelitCustomInitContext *ctx)
>> 2,
>> FALSE, /* raw */
>> FALSE, /* allow_cached */
>> - ctx->cancellable,
>> + g_task_get_cancellable (task),
>> (GAsyncReadyCallback)getportcfg_ready,
>> - ctx);
>> + task);
>> return;
>> }
>>
>> out:
>> - g_simple_async_result_set_op_res_gboolean (ctx->result, TRUE);
>> - telit_custom_init_context_complete_and_free (ctx);
>> + g_task_return_boolean (task, TRUE);
>> + g_object_unref (task);
>> }
>>
>> void
>> @@ -318,23 +319,16 @@ telit_custom_init (MMPortProbe *probe,
>> GAsyncReadyCallback callback,
>> gpointer user_data)
>> {
>> - MMDevice *device;
>> - MMKernelDevice *port_device;
>> TelitCustomInitContext *ctx;
>> -
>> - device = mm_port_probe_peek_device (probe);
>> - port_device = mm_port_probe_peek_port (probe);
>> + GTask *task;
>>
>> ctx = g_slice_new (TelitCustomInitContext);
>> - ctx->result = g_simple_async_result_new (G_OBJECT (probe),
>> - callback,
>> - user_data,
>> - telit_custom_init);
>> - ctx->probe = g_object_ref (probe);
>> ctx->port = g_object_ref (port);
>> - ctx->cancellable = cancellable ? g_object_ref (cancellable) : NULL;
>> ctx->getportcfg_done = FALSE;
>> ctx->getportcfg_retries = 3;
>>
>> - telit_custom_init_step (ctx);
>> + task = g_task_new (probe, cancellable, callback, user_data);
>> + g_task_set_task_data (task, ctx, (GDestroyNotify)telit_custom_init_context_free);
>> +
>> + telit_custom_init_step (task);
>> }
>>
>
>
> --
> Aleksander
> https://aleksander.es
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