[Spice-devel] [PATCH spice-gtk v2] file-transfer-task: emit signals in main context

[Jakub Janků]

Parts of the internal file transfer task API
can be invoked in the coroutine context, so in these cases
use g_coroutine_signal_emit and g_coroutine_object_notify.

Some functions (such as spice_main_channel_clipboard_selection_grab)
wake up the channel and thus can immediately switch to the coroutine context.
Delivering signals in the coroutine context as well, could theoretically
lead to problems with reentrancy, since the user of spice-gtk does not
expect this behavior.
Spice-gtk, on the other hand, assumes that the public functions are called
from the main context. So calling spice_main_channel_clipboard_selection_grab
from the coroutine context prints an error as we try to switch to a
coroutine we are already in.

Such issues are probably not likely, but the fix is easy.

Signed-off-by: Jakub Janků <jjanku at redhat.com>
---
 src/spice-file-transfer-task.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/spice-file-transfer-task.c b/src/spice-file-transfer-task.c
index d0170da..90f31db 100644
--- a/src/spice-file-transfer-task.c
+++ b/src/spice-file-transfer-task.c
@@ -327,7 +327,7 @@ void spice_file_transfer_task_completed(SpiceFileTransferTask *self,
                                self);
     self->pending = TRUE;
 signal:
-    g_signal_emit(self, task_signals[SIGNAL_FINISHED], 0, self->error);
+    g_coroutine_signal_emit(self, task_signals[SIGNAL_FINISHED], 0, self->error);
     /* SpiceFileTransferTask unref is done after input stream is closed */
 }
 
@@ -433,8 +433,8 @@ void spice_file_transfer_task_read_async(SpiceFileTransferTask *self,
     /* Notify the progress prior the read to make the info be related to the
      * data that was already sent. To notify the 100% (completed), channel-main
      * should call read-async when it expects EOF. */
-    g_object_notify(G_OBJECT(self), "progress");
-    g_object_notify(G_OBJECT(self), "transferred-bytes");
+    g_coroutine_object_notify(G_OBJECT(self), "progress");
+    g_coroutine_object_notify(G_OBJECT(self), "transferred-bytes");
 
     task = g_task_new(self, self->cancellable, callback, userdata);
 
-- 
2.21.0