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/**
* Test to make sure we don't get stuck polling a dbus connection
* which has no data on the socket. This was an issue where
* one pending call would read all the data off the bus
* and the second pending call would not check to see
* if its data had already been read before polling the connection
* and blocking.
**/
#include <dbus/dbus.h>
#include <dbus/dbus-sysdeps.h>
#include <stdio.h>
#include <stdlib.h>
static void
_run_iteration (DBusConnection *conn)
{
DBusPendingCall *echo_pending;
DBusPendingCall *dbus_pending;
DBusMessage *method;
DBusMessage *reply;
char *echo = "echo";
/* send the first message */
method = dbus_message_new_method_call ("org.freedesktop.DBus.TestSuiteEchoService",
"/org/freedesktop/TestSuite",
"org.freedesktop.TestSuite",
"Echo");
dbus_message_append_args (method, DBUS_TYPE_STRING, &echo, NULL);
dbus_connection_send_with_reply (conn, method, &echo_pending, -1);
dbus_message_unref (method);
/* send the second message */
method = dbus_message_new_method_call (DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
"org.freedesktop.Introspectable",
"Introspect");
dbus_connection_send_with_reply (conn, method, &dbus_pending, -1);
dbus_message_unref (method);
/* block on the second message (should return immediately) */
dbus_pending_call_block (dbus_pending);
/* block on the first message */
/* if it does not return immediately chances
are we hit the block in poll bug */
dbus_pending_call_block (echo_pending);
/* check the reply only to make sure we
are not getting errors unrelated
to the block in poll bug */
reply = dbus_pending_call_steal_reply (echo_pending);
if (reply == NULL)
{
printf ("Failed: Reply is NULL ***\n");
exit (1);
}
if (dbus_message_get_type (reply) == DBUS_MESSAGE_TYPE_ERROR)
{
printf ("Failed: Reply is error: %s ***\n", dbus_message_get_error_name (reply));
exit (1);
}
dbus_message_unref (reply);
dbus_pending_call_unref (dbus_pending);
dbus_pending_call_unref (echo_pending);
}
int
main (int argc, char *argv[])
{
long start_tv_sec, start_tv_usec;
long end_tv_sec, end_tv_usec;
int i;
DBusMessage *method;
DBusConnection *conn;
DBusError error;
/* Time each iteration and make sure it doesn't take more than 5 seconds
to complete. Outside influences may cause connections to take longer
but if it does and we are stuck in a poll call then we know the
stuck in poll bug has come back to haunt us */
printf ("*** Testing stuck in poll\n");
dbus_error_init (&error);
conn = dbus_bus_get (DBUS_BUS_SESSION, &error);
/* run 100 times to make sure */
for (i = 0; i < 100; i++)
{
long delta;
_dbus_get_current_time (&start_tv_sec, &start_tv_usec);
_run_iteration (conn);
_dbus_get_current_time (&end_tv_sec, &end_tv_usec);
/* we just care about seconds */
delta = end_tv_sec - start_tv_sec;
printf ("Iter %i: %lis\n", i, delta);
if (delta >= 5)
{
printf ("Failed: looks like we might have been be stuck in poll ***\n");
exit (1);
}
}
method = dbus_message_new_method_call ("org.freedesktop.TestSuiteEchoService",
"/org/freedesktop/TestSuite",
"org.freedesktop.TestSuite",
"Exit");
dbus_connection_send (conn, method, NULL);
dbus_message_unref (method);
printf ("Success ***\n");
exit (0);
}
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