port-serial-at: make mm_port_serial_at_command_finish() transfer ownership

This will make it slightly easier to port mm_port_serial_at_command() to
use GTask, since we won't have to keep a pointer to the result in GTask
after _finish() has been called.

In most cases the caller needs the value anyway, so this doesn't add too
much hasle.

13 files changed, 24 insertions, 31 deletions

diff --git a/src/mm-base-modem-at.c b/src/mm-base-modem-at.c
index d1352e08..893a3280 100644
--- a/src/mm-base-modem-at.c
+++ b/src/mm-base-modem-at.c
@@ -160,7 +160,7 @@ at_sequence_parse_response (MMPortSerialAt    *port,
     GVariant                             *result = NULL;
     GError                               *result_error = NULL;
     GSimpleAsyncResult                   *simple;
-    const gchar                          *response;
+    g_autofree gchar                     *response = NULL;
     GError                               *error = NULL;
 
     response = mm_port_serial_at_command_finish (port, res, &error);
@@ -513,7 +513,7 @@ at_command_ready (MMPortSerialAt *port,
                   GAsyncResult *res,
                   AtCommandContext *ctx)
 {
-    const gchar *response;
+    gchar *response;
     GError *error = NULL;
 
     response = mm_port_serial_at_command_finish (port, res, &error);
@@ -530,7 +530,7 @@ at_command_ready (MMPortSerialAt *port,
         g_simple_async_result_take_error (ctx->result, error);
     /* Valid string response */
     else if (response)
-        g_simple_async_result_set_op_res_gpointer (ctx->result, (gchar *)response, NULL);
+        g_simple_async_result_set_op_res_gpointer (ctx->result, response, g_free);
     else
         g_assert_not_reached ();
 
diff --git a/src/mm-port-probe.c b/src/mm-port-probe.c
index e3298ed8..61b8cef3 100644
--- a/src/mm-port-probe.c
+++ b/src/mm-port-probe.c
@@ -994,7 +994,7 @@ serial_probe_at_parse_response (MMPortSerialAt *port,
 {
     GVariant            *result = NULL;
     GError              *result_error = NULL;
-    const gchar         *response = NULL;
+    g_autofree gchar    *response = NULL;
     GError              *error = NULL;
     PortProbeRunContext *ctx;
 
diff --git a/src/mm-port-serial-at.c b/src/mm-port-serial-at.c
index 88d01cf4..bd8c3b32 100644
--- a/src/mm-port-serial-at.c
+++ b/src/mm-port-serial-at.c
@@ -340,24 +340,15 @@ at_command_to_byte_array (const char *command, gboolean is_raw, gboolean send_lf
     return buf;
 }
 
-const gchar *
+gchar *
 mm_port_serial_at_command_finish (MMPortSerialAt *self,
                                   GAsyncResult *res,
                                   GError **error)
 {
-    GString *str;
-
     if (g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (res), error))
         return NULL;
 
-    str = (GString *)g_simple_async_result_get_op_res_gpointer (G_SIMPLE_ASYNC_RESULT (res));
-    return str->str;
-}
-
-static void
-string_free (GString *str)
-{
-    g_string_free (str, TRUE);
+    return (gchar *)g_simple_async_result_get_op_res_gpointer (G_SIMPLE_ASYNC_RESULT (res));
 }
 
 static void
@@ -368,6 +359,7 @@ serial_command_ready (MMPortSerial *port,
     GByteArray *response_buffer;
     GError *error = NULL;
     GString *response;
+    gchar *str;
 
     response_buffer = mm_port_serial_command_finish (port, res, &error);
     if (!response_buffer) {
@@ -384,9 +376,8 @@ serial_command_ready (MMPortSerial *port,
         g_byte_array_remove_range (response_buffer, 0, response_buffer->len);
     g_byte_array_unref (response_buffer);
 
-    g_simple_async_result_set_op_res_gpointer (simple,
-                                               response,
-                                               (GDestroyNotify)string_free);
+    str = g_string_free (response, FALSE);
+    g_simple_async_result_set_op_res_gpointer (simple, str, g_free);
     g_simple_async_result_complete (simple);
     g_object_unref (simple);
 }
diff --git a/src/mm-port-serial-at.h b/src/mm-port-serial-at.h
index 901afcba..82368875 100644
--- a/src/mm-port-serial-at.h
+++ b/src/mm-port-serial-at.h
@@ -108,7 +108,7 @@ void         mm_port_serial_at_command        (MMPortSerialAt *self,
                                                GCancellable *cancellable,
                                                GAsyncReadyCallback callback,
                                                gpointer user_data);
-const gchar *mm_port_serial_at_command_finish (MMPortSerialAt *self,
+gchar *mm_port_serial_at_command_finish       (MMPortSerialAt *self,
                                                GAsyncResult *res,
                                                GError **error);
 
diff --git a/src/plugins/cinterion/mm-plugin-cinterion.c b/src/plugins/cinterion/mm-plugin-cinterion.c
index 7ec7838b..f1b581f1 100644
--- a/src/plugins/cinterion/mm-plugin-cinterion.c
+++ b/src/plugins/cinterion/mm-plugin-cinterion.c
@@ -80,7 +80,7 @@ sqport_ready (MMPortSerialAt *port,
               GTask          *task)
 {
     MMPortProbe *probe;
-    const gchar *response;
+    g_autofree gchar *response = NULL;
 
     probe = g_task_get_source_object (task);
 
diff --git a/src/plugins/dell/mm-plugin-dell.c b/src/plugins/dell/mm-plugin-dell.c
index 47b2a69b..e7f813b1 100644
--- a/src/plugins/dell/mm-plugin-dell.c
+++ b/src/plugins/dell/mm-plugin-dell.c
@@ -158,7 +158,7 @@ response_ready (MMPortSerialAt *port,
 {
     CustomInitContext *ctx;
     MMPortProbe       *probe;
-    const gchar       *response;
+    g_autofree gchar  *response = NULL;
     GError            *error = NULL;
     gchar             *lower;
     DellManufacturer   manufacturer;
diff --git a/src/plugins/huawei/mm-plugin-huawei.c b/src/plugins/huawei/mm-plugin-huawei.c
index 89897e9e..b0b7a616 100644
--- a/src/plugins/huawei/mm-plugin-huawei.c
+++ b/src/plugins/huawei/mm-plugin-huawei.c
@@ -104,7 +104,7 @@ getportmode_ready (MMPortSerialAt *port,
     MMDevice                *device;
     MMPortProbe             *probe;
     HuaweiCustomInitContext *ctx;
-    const gchar             *response;
+    g_autofree gchar        *response = NULL;
     GArray                  *modes;
     g_autoptr(GError)        error = NULL;
 
diff --git a/src/plugins/longcheer/mm-plugin-longcheer.c b/src/plugins/longcheer/mm-plugin-longcheer.c
index f3c6bc6c..a53e6d03 100644
--- a/src/plugins/longcheer/mm-plugin-longcheer.c
+++ b/src/plugins/longcheer/mm-plugin-longcheer.c
@@ -61,7 +61,7 @@ gmr_ready (MMPortSerialAt *port,
 {
     MMPortProbe *probe;
     const gchar *p;
-    const gchar *response;
+    g_autofree gchar *response = NULL;
 
     probe = g_task_get_source_object (task);
 
diff --git a/src/plugins/novatel/mm-common-novatel.c b/src/plugins/novatel/mm-common-novatel.c
index b6b0e272..2e0d3da3 100644
--- a/src/plugins/novatel/mm-common-novatel.c
+++ b/src/plugins/novatel/mm-common-novatel.c
@@ -49,10 +49,11 @@ nwdmat_ready (MMPortSerialAt *port,
 {
     g_autoptr(GError)  error = NULL;
     MMPortProbe       *probe;
+    g_autofree gchar  *response = NULL;
 
     probe = g_task_get_source_object (task);
 
-    mm_port_serial_at_command_finish (port, res, &error);
+    response = mm_port_serial_at_command_finish (port, res, &error);
     if (error) {
         if (g_error_matches (error, MM_SERIAL_ERROR, MM_SERIAL_ERROR_RESPONSE_TIMEOUT)) {
             custom_init_step (task);
diff --git a/src/plugins/sierra/mm-common-sierra.c b/src/plugins/sierra/mm-common-sierra.c
index 72cbc34f..06b889ee 100644
--- a/src/plugins/sierra/mm-common-sierra.c
+++ b/src/plugins/sierra/mm-common-sierra.c
@@ -105,7 +105,7 @@ gcap_ready (MMPortSerialAt *port,
 {
     MMPortProbe *probe;
     SierraCustomInitContext *ctx;
-    const gchar *response;
+    g_autofree gchar *response = NULL;
     GError *error = NULL;
 
     probe = g_task_get_source_object (task);
diff --git a/src/plugins/telit/mm-common-telit.c b/src/plugins/telit/mm-common-telit.c
index 66c82b9d..a401b1ae 100644
--- a/src/plugins/telit/mm-common-telit.c
+++ b/src/plugins/telit/mm-common-telit.c
@@ -185,7 +185,7 @@ getportcfg_ready (MMPortSerialAt *port,
                   GAsyncResult *res,
                   GTask *task)
 {
-    const gchar *response;
+    g_autofree gchar *response = NULL;
     GError *error = NULL;
     MMPortProbe *probe;
     TelitCustomInitContext *ctx;
diff --git a/src/plugins/ublox/mm-plugin-ublox.c b/src/plugins/ublox/mm-plugin-ublox.c
index e606eba1..c88369de 100644
--- a/src/plugins/ublox/mm-plugin-ublox.c
+++ b/src/plugins/ublox/mm-plugin-ublox.c
@@ -151,10 +151,11 @@ quick_at_ready (MMPortSerialAt *port,
 {
     MMPortProbe       *probe;
     g_autoptr(GError)  error = NULL;
+    g_autofree gchar  *response = NULL;
 
     probe = g_task_get_source_object (task);
 
-    mm_port_serial_at_command_finish (port, res, &error);
+    response = mm_port_serial_at_command_finish (port, res, &error);
     if (error) {
         /* On a timeout error, wait for READY URC */
         if (g_error_matches (error, MM_SERIAL_ERROR, MM_SERIAL_ERROR_RESPONSE_TIMEOUT)) {
diff --git a/src/plugins/x22x/mm-plugin-x22x.c b/src/plugins/x22x/mm-plugin-x22x.c
index ccfcd465..e68e6b24 100644
--- a/src/plugins/x22x/mm-plugin-x22x.c
+++ b/src/plugins/x22x/mm-plugin-x22x.c
@@ -63,10 +63,10 @@ gmr_ready (MMPortSerialAt *port,
            GAsyncResult   *res,
            GTask          *task)
 {
-    MMPortProbe *probe;
-    const gchar *p;
-    const gchar *response;
-    GError      *error = NULL;
+    MMPortProbe      *probe;
+    const gchar      *p;
+    g_autofree gchar *response = NULL;
+    GError           *error = NULL;
 
     probe = g_task_get_source_object (task);