bool
DBusThread::SetUpEventLoop()
{
// If we already have a connection, exit
if (mConnection) {
return false;
}
dbus_threads_init_default();
DBusError err;
dbus_error_init(&err);
// If we can't establish a connection to dbus, nothing else will work
nsresult rv = EstablishDBusConnection();
if (NS_FAILED(rv)) {
NS_WARNING("Cannot create DBus Connection for DBus Thread!");
return false;
}
// Set which messages will be processed by this dbus connection.
// Since we are maintaining a single thread for all the DBus bluez
// signals we want, register all of them in this thread at startup.
// The event handler will sort the destinations out as needed.
for (uint32_t i = 0; i < ArrayLength(DBUS_SIGNALS); ++i) {
dbus_bus_add_match(mConnection,
DBUS_SIGNALS[i],
&err);
if (dbus_error_is_set(&err)) {
LOG_AND_FREE_DBUS_ERROR(&err);
return false;
}
}
return true;
}
bool
DBusWatcher::SetUp()
{
MOZ_ASSERT(!NS_IsMainThread());
// If we already have a connection, exit
if (mConnection) {
return false;
}
// socketpair opens two sockets for the process to communicate on.
// This is how android's implementation of the dbus event loop
// communicates with itself in relation to IPC signals. These
// sockets are contained sequentially in the same struct in the
// android code, but we break them out into class members here.
// Therefore we read into a local array and then copy.
int sockets[2];
if (socketpair(AF_LOCAL, SOCK_STREAM, 0, sockets) < 0) {
return false;
}
mControlFdR.rwget() = sockets[0];
mControlFdW.rwget() = sockets[1];
pollfd* p = mPollData.AppendElement();
p->fd = mControlFdR.get();
p->events = POLLIN;
p->revents = 0;
// Due to the fact that mPollData and mWatchData have to match, we
// push a null to the front of mWatchData since it has the control
// fd in the first slot of mPollData.
mWatchData.AppendElement(static_cast<DBusWatch*>(nullptr));
// If we can't establish a connection to dbus, nothing else will work
nsresult rv = EstablishDBusConnection();
if (NS_FAILED(rv)) {
NS_WARNING("Cannot create DBus Connection for DBus Thread!");
return false;
}
dbus_bool_t success =
dbus_connection_set_watch_functions(mConnection, AddWatchFunction,
RemoveWatchFunction,
ToggleWatchFunction, this, nullptr);
NS_ENSURE_TRUE(success == TRUE, false);
dbus_connection_set_wakeup_main_function(mConnection, DBusWakeupFunction,
this, nullptr);
return true;
}
bool
DBusThread::SetUpEventLoop()
{
// If we already have a connection, exit
if (mConnection) {
return false;
}
dbus_threads_init_default();
DBusError err;
dbus_error_init(&err);
// If we can't establish a connection to dbus, nothing else will work
nsresult rv = EstablishDBusConnection();
if (NS_FAILED(rv)) {
NS_WARNING("Cannot create DBus Connection for DBus Thread!");
return false;
}
return true;
}