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gdbus-peer test: let GDBusServer start before notifying main thread

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When running the nonce-tcp and tcp-anonymous tests in one run
of gdbus-peer, or running one of them twice via command-line options
"-p /gdbus/tcp-anonymous -p /gdbus/tcp-anonymous", the one run second
would sometimes fail to connect with ECONNRESET.

Adding more debug messages revealed that in the successful case,
g_main_loop_run() was executed in the server thread first:

 # tcp-anonymous: server thread: listening on tcp:host=localhost,port=53517
 # tcp-anonymous: server thread: starting server...
 # tcp-anonymous: server thread: creating main loop...
 # tcp-anonymous: server thread: running main loop...
 # tcp-anonymous: main thread: trying tcp:host=localhost,port=53517...
 # tcp-anonymous: main thread: waiting for server thread...

but in the failing case, the main thread attempted to connect
before the call to g_main_loop_run() in the server thread:

 # tcp-anonymous: server thread: listening on tcp:host=localhost,port=40659
 # tcp-anonymous: server thread: starting server...
 # tcp-anonymous: server thread: creating main loop...
 # tcp-anonymous: main thread: trying tcp:host=localhost,port=40659...
 # tcp-anonymous: server thread: running main loop...

(The log message "creating main loop" was immediately before
create_service_loop(), and "running main loop" was immediately
before g_main_loop_run().)

To ensure that the GDBusServer has a chance to start accepting
connections before the main thread tries to connect to it, do not
tell the main thread about the service_loop immediately, but instead
defer it to an idle.

Bug: https://bugzilla.gnome.org/show_bug.cgi?id=749079
Signed-off-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
Reviewed-by: Philip Withnall <philip.withnall@collabora.co.uk>
This commit is contained in:
Simon McVittie
2015-05-07 16:45:48 +01:00
parent 474877d916
commit 6f859fe21a
1 changed files with 28 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
gio/tests/gdbus-peer.c
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@@ -335,14 +335,34 @@ on_new_connection (GDBusServer *server,
return TRUE;
}
static void
create_service_loop (GMainContext *service_context)
/* We don't tell the main thread about the new GDBusServer until it has
* had a chance to start listening. */
static gboolean
idle_in_service_loop (gpointer loop)
{
g_assert (service_loop == NULL);
g_mutex_lock (&service_loop_lock);
service_loop = g_main_loop_new (service_context, FALSE);
service_loop = loop;
g_cond_broadcast (&service_loop_cond);
g_mutex_unlock (&service_loop_lock);
return G_SOURCE_REMOVE;
}
static void
run_service_loop (GMainContext *service_context)
{
GMainLoop *loop;
GSource *source;
g_assert (service_loop == NULL);
loop = g_main_loop_new (service_context, FALSE);
source = g_idle_source_new ();
g_source_set_callback (source, idle_in_service_loop, loop, NULL);
g_source_attach (source, service_context);
g_source_unref (source);
g_main_loop_run (loop);
}
static void
@@ -417,8 +437,7 @@ service_thread_func (gpointer user_data)
g_dbus_server_start (server);
create_service_loop (service_context);
g_main_loop_run (service_loop);
run_service_loop (service_context);
g_main_context_pop_thread_default (service_context);
@@ -512,8 +531,7 @@ service_thread_func (gpointer data)
data);
g_socket_service_start (service);
create_service_loop (service_context);
g_main_loop_run (service_loop);
run_service_loop (service_context);
g_main_context_pop_thread_default (service_context);
@@ -1212,8 +1230,7 @@ nonce_tcp_service_thread_func (gpointer user_data)
g_dbus_server_start (server);
create_service_loop (service_context);
g_main_loop_run (service_loop);
run_service_loop (service_context);
g_main_context_pop_thread_default (service_context);
@@ -1405,8 +1422,7 @@ tcp_anonymous_service_thread_func (gpointer user_data)
g_dbus_server_start (server);
create_service_loop (service_context);
g_main_loop_run (service_loop);
run_service_loop (service_context);
g_main_context_pop_thread_default (service_context);
@@ -1561,8 +1577,7 @@ codegen_service_thread_func (gpointer user_data)
G_CALLBACK (codegen_on_new_connection),
animal);
create_service_loop (service_context);
g_main_loop_run (service_loop);
run_service_loop (service_context);
g_object_unref (animal);