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Bug 983576: Refactor BlueZ start/stop code, r=echou

Browse Source 
With this patch, the start code of Bluetooth's BlueZ back mostly
runs on the I/O thread. Only the loading of the BT firmware and
the blocking connection setup is done on the BT thread.

The stop code has been moved to the I/O thread, except for some
initial waiting and the final cleanup of the firmware. The code
doesn't wait for errors anymore when cleaning up the connection
to DBus. This makes it run completely non-blocking. The initial
waiting may later be replaced by something more sophisticated.
This commit is contained in:
Thomas Zimmermann 2014-03-27 11:43:48 +01:00
parent a0cd2b4846
commit 92743c5ab4
1 changed files with 110 additions and 95 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

205
dom/bluetooth/bluez/BluetoothDBusService.cpp
View File

@ -279,7 +279,7 @@ static const char* sBluetoothDBusSignals[] =
};
// The DBus connection to the BlueZ daemon
static RawDBusConnection* sDBusConnection;
static StaticAutoPtr<RawDBusConnection> sDBusConnection;
// Only A2DP and HID are authorized.
static nsTArray<BluetoothServiceClass> sAuthorizedServiceClass;
@ -1884,12 +1884,36 @@ public:
void Run()
{
MOZ_ASSERT(!sDBusConnection);
MOZ_ASSERT(!NS_IsMainThread()); // I/O thread
sDBusConnection = mConnection;
if (sDBusConnection) {
BT_WARNING("DBus connection has already been established.");
nsRefPtr<nsRunnable> runnable = new BluetoothService::ToggleBtAck(true);
if (NS_FAILED(NS_DispatchToMainThread(runnable))) {
BT_WARNING("Failed to dispatch to main thread!");
}
return;
}
// Add a filter for all incoming messages_base
if (!dbus_connection_add_filter(mConnection->GetConnection(),
EventFilter, nullptr, nullptr)) {
BT_WARNING("Cannot create DBus Event Filter for DBus Thread!");
nsRefPtr<nsRunnable> runnable = new BluetoothService::ToggleBtAck(false);
if (NS_FAILED(NS_DispatchToMainThread(runnable))) {
BT_WARNING("Failed to dispatch to main thread!");
}
return;
}
mConnection->Watch();
if (!sPairingReqTable) {
sPairingReqTable = new nsDataHashtable<nsStringHashKey, DBusMessage* >;
}
sDBusConnection = mConnection.forget();
nsRefPtr<nsRunnable> runnable =
new BluetoothService::ToggleBtAck(true);
if (NS_FAILED(NS_DispatchToMainThread(runnable))) {
@ -1904,11 +1928,11 @@ public:
* explicitly here.
*/
if (mQueryDefaultAdapter) {
bool success = mConnection->SendWithReply(OnDefaultAdapterReply, nullptr,
1000, "/",
DBUS_MANAGER_IFACE,
"DefaultAdapter",
DBUS_TYPE_INVALID);
bool success = sDBusConnection->SendWithReply(OnDefaultAdapterReply, nullptr,
1000, "/",
DBUS_MANAGER_IFACE,
"DefaultAdapter",
DBUS_TYPE_INVALID);
if (!success) {
BT_WARNING("Failed to query default adapter!");
}
@ -1916,7 +1940,7 @@ public:
}
private:
RawDBusConnection* mConnection;
nsAutoPtr<RawDBusConnection> mConnection;
bool mQueryDefaultAdapter;
};
@ -1931,8 +1955,8 @@ public:
#ifdef MOZ_WIDGET_GONK
if (!sBluedroid.Enable()) {
BT_WARNING("Bluetooth not available.");
nsCOMPtr<nsIRunnable> ackTask = new BluetoothService::ToggleBtAck(false);
if (NS_FAILED(NS_DispatchToMainThread(ackTask))) {
nsRefPtr<nsRunnable> runnable = new BluetoothService::ToggleBtAck(false);
if (NS_FAILED(NS_DispatchToMainThread(runnable))) {
BT_WARNING("Failed to dispatch to main thread!");
}
return NS_ERROR_FAILURE;
@ -1943,8 +1967,8 @@ public:
nsresult rv = connection->EstablishDBusConnection();
if (NS_FAILED(rv)) {
BT_WARNING("Failed to establish connection to BlueZ daemon");
nsCOMPtr<nsIRunnable> ackTask = new BluetoothService::ToggleBtAck(false);
if (NS_FAILED(NS_DispatchToMainThread(ackTask))) {
nsRefPtr<nsRunnable> runnable = new BluetoothService::ToggleBtAck(false);
if (NS_FAILED(NS_DispatchToMainThread(runnable))) {
BT_WARNING("Failed to dispatch to main thread!");
}
return NS_ERROR_FAILURE;
@ -1956,7 +1980,9 @@ public:
// 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.
// The event handler will sort the destinations out as needed. The
// call to dbus_bus_add_match has to run on the BT thread because
// it can block.
for (uint32_t i = 0; i < ArrayLength(sBluetoothDBusSignals); ++i) {
dbus_bus_add_match(connection->GetConnection(),
sBluetoothDBusSignals[i],
@ -1966,21 +1992,6 @@ public:
}
}
// Add a filter for all incoming messages_base
if (!dbus_connection_add_filter(connection->GetConnection(),
EventFilter, nullptr, nullptr)) {
BT_WARNING("Cannot create DBus Event Filter for DBus Thread!");
nsCOMPtr<nsIRunnable> ackTask = new BluetoothService::ToggleBtAck(false);
if (NS_FAILED(NS_DispatchToMainThread(ackTask))) {
BT_WARNING("Failed to dispatch to main thread!");
}
return NS_ERROR_FAILURE;
}
if (!sPairingReqTable) {
sPairingReqTable = new nsDataHashtable<nsStringHashKey, DBusMessage* >;
}
Task* task = new StartDBusConnectionTask(connection, sAdapterPath.IsEmpty());
DispatchToDBusThread(task);
@ -1999,68 +2010,56 @@ BluetoothDBusService::StartInternal()
return rv;
}
PLDHashOperator
UnrefDBusMessages(const nsAString& key, DBusMessage* value, void* arg)
{
dbus_message_unref(value);
return PL_DHASH_NEXT;
}
class DeleteDBusConnectionTask : public Task
{
public:
DeleteDBusConnectionTask(RawDBusConnection* aConnection)
: mConnection(aConnection)
{
MOZ_ASSERT(mConnection);
}
void Run()
{
MOZ_ASSERT(!NS_IsMainThread());
// This command closes the DBus connection and all instances of
// DBusWatch will be removed and free'd.
delete mConnection;
}
private:
RawDBusConnection* mConnection;
};
class StopBluetoothRunnable MOZ_FINAL : public nsRunnable
class DisableBluetoothRunnable MOZ_FINAL : public nsRunnable
{
public:
NS_IMETHOD Run()
{
// This could block. It should never be run on the main thread.
MOZ_ASSERT(!NS_IsMainThread());
{
MonitorAutoLock lock(*sStopBluetoothMonitor);
if (sConnectedDeviceCount > 0) {
lock.Wait(PR_SecondsToInterval(TIMEOUT_FORCE_TO_DISABLE_BT));
}
if (NS_IsMainThread()) {
// Forward this runnable to BT thread
return DispatchToBtThread(this);
}
#ifdef MOZ_WIDGET_GONK
MOZ_ASSERT(sBluedroid.IsEnabled());
// Disable() return true on success, so we need to invert it
bool isEnabled = !sBluedroid.Disable();
#else
bool isEnabled = false;
#endif
nsRefPtr<nsRunnable> runnable =
new BluetoothService::ToggleBtAck(isEnabled);
nsresult rv = NS_DispatchToMainThread(runnable);
if (NS_FAILED(rv)) {
BT_WARNING("Failed to dispatch to main thread!");
}
return rv;
}
};
class DeleteDBusConnectionTask MOZ_FINAL : public Task
{
public:
DeleteDBusConnectionTask()
{ }
void Run()
{
MOZ_ASSERT(!NS_IsMainThread()); // I/O thread
if (!sDBusConnection) {
nsCOMPtr<nsIRunnable> ackTask = new BluetoothService::ToggleBtAck(false);
if (NS_FAILED(NS_DispatchToMainThread(ackTask))) {
BT_WARNING("DBus connection has not been established.");
nsRefPtr<nsRunnable> runnable = new BluetoothService::ToggleBtAck(false);
if (NS_FAILED(NS_DispatchToMainThread(runnable))) {
BT_WARNING("Failed to dispatch to main thread!");
}
return NS_OK;
return;
}
DBusError err;
dbus_error_init(&err);
for (uint32_t i = 0; i < ArrayLength(sBluetoothDBusSignals); ++i) {
dbus_bus_remove_match(sDBusConnection->GetConnection(),
sBluetoothDBusSignals[i],
&err);
if (dbus_error_is_set(&err)) {
LOG_AND_FREE_DBUS_ERROR(&err);
}
sBluetoothDBusSignals[i], NULL);
}
dbus_connection_remove_filter(sDBusConnection->GetConnection(),
@ -2078,8 +2077,8 @@ public:
__FUNCTION__, KEY_REMOTE_AGENT);
}
// unref stored DBusMessages before clear the hashtable
sPairingReqTable->EnumerateRead(UnrefDBusMessages, nullptr);
// unref stored DBusMessages before clearing the hashtable
sPairingReqTable->EnumerateRead(UnrefDBusMessage, nullptr);
sPairingReqTable->Clear();
sIsPairing = 0;
@ -2088,27 +2087,43 @@ public:
sAuthorizedServiceClass.Clear();
sControllerArray.Clear();
RawDBusConnection* connection = sDBusConnection;
// This command closes the DBus connection and all its instances
// of DBusWatch will be removed and free'd.
sDBusConnection = nullptr;
DispatchToDBusThread(new DeleteDBusConnectionTask(connection));
#ifdef MOZ_WIDGET_GONK
MOZ_ASSERT(sBluedroid.IsEnabled());
if (!sBluedroid.Disable()) {
nsCOMPtr<nsIRunnable> ackTask = new BluetoothService::ToggleBtAck(true);
if (NS_FAILED(NS_DispatchToMainThread(ackTask))) {
BT_WARNING("Failed to dispatch to main thread!");
}
return NS_ERROR_FAILURE;
// We can only dispatch to the BT thread if we're on the main
// thread. Thus we dispatch our runnable to the main thread
// from where it will forward itself to the BT thread.
nsRefPtr<nsRunnable> runnable = new DisableBluetoothRunnable();
if (NS_FAILED(NS_DispatchToMainThread(runnable))) {
BT_WARNING("Failed to dispatch to BT thread!");
}
#endif
}
nsCOMPtr<nsIRunnable> ackTask = new BluetoothService::ToggleBtAck(false);
if (NS_FAILED(NS_DispatchToMainThread(ackTask))) {
BT_WARNING("Failed to dispatch to main thread!");
private:
static PLDHashOperator
UnrefDBusMessage(const nsAString& key, DBusMessage* value, void* arg)
{
dbus_message_unref(value);
return PL_DHASH_NEXT;
}
};
class StopBluetoothRunnable MOZ_FINAL : public nsRunnable
{
public:
NS_IMETHOD Run()
{
MOZ_ASSERT(!NS_IsMainThread()); // BT thread
// This could block. It should never be run on the main thread.
MonitorAutoLock lock(*sStopBluetoothMonitor);
if (sConnectedDeviceCount > 0) {
lock.Wait(PR_SecondsToInterval(TIMEOUT_FORCE_TO_DISABLE_BT));
}
DispatchToDBusThread(new DeleteDBusConnectionTask());
return NS_OK;
}
};