| // |
| // Copyright 2010 The Android Open Source Project |
| // |
| // Provides a shared memory transport for input events. |
| // |
| #define LOG_TAG "InputTransport" |
| |
| //#define LOG_NDEBUG 0 |
| |
| // Log debug messages about channel messages (send message, receive message) |
| #define DEBUG_CHANNEL_MESSAGES 0 |
| |
| // Log debug messages whenever InputChannel objects are created/destroyed |
| #define DEBUG_CHANNEL_LIFECYCLE 0 |
| |
| #define DEBUG_TRANSPORT_ACTIONS 0 |
| // Log debug messages about transport actions |
| |
| |
| #include <cutils/log.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <ui/InputTransport.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| |
| |
| namespace android { |
| |
| // Socket buffer size. The default is typically about 128KB, which is much larger than |
| // we really need. So we make it smaller. It just needs to be big enough to hold |
| // a few dozen large multi-finger motion events in the case where an application gets |
| // behind processing touches. |
| static const size_t SOCKET_BUFFER_SIZE = 32 * 1024; |
| |
| |
| // --- InputMessage --- |
| |
| bool InputMessage::isValid(size_t actualSize) const { |
| if (size() == actualSize) { |
| switch (header.type) { |
| case TYPE_KEY: |
| return true; |
| case TYPE_MOTION: |
| return body.motion.pointerCount > 0 |
| && body.motion.pointerCount <= MAX_POINTERS; |
| case TYPE_FINISHED: |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| size_t InputMessage::size() const { |
| switch (header.type) { |
| case TYPE_KEY: |
| return sizeof(Header) + body.key.size(); |
| case TYPE_MOTION: |
| return sizeof(Header) + body.motion.size(); |
| case TYPE_FINISHED: |
| return sizeof(Header) + body.finished.size(); |
| } |
| return sizeof(Header); |
| } |
| |
| |
| // --- InputChannel --- |
| |
| InputChannel::InputChannel(const String8& name, int fd) : |
| mName(name), mFd(fd) { |
| #if DEBUG_CHANNEL_LIFECYCLE |
| ALOGD("Input channel constructed: name='%s', fd=%d", |
| mName.string(), fd); |
| #endif |
| |
| int result = fcntl(mFd, F_SETFL, O_NONBLOCK); |
| LOG_ALWAYS_FATAL_IF(result != 0, "channel '%s' ~ Could not make socket " |
| "non-blocking. errno=%d", mName.string(), errno); |
| } |
| |
| InputChannel::~InputChannel() { |
| #if DEBUG_CHANNEL_LIFECYCLE |
| ALOGD("Input channel destroyed: name='%s', fd=%d", |
| mName.string(), mFd); |
| #endif |
| |
| ::close(mFd); |
| } |
| |
| status_t InputChannel::openInputChannelPair(const String8& name, |
| sp<InputChannel>& outServerChannel, sp<InputChannel>& outClientChannel) { |
| int sockets[2]; |
| if (socketpair(AF_UNIX, SOCK_SEQPACKET, 0, sockets)) { |
| status_t result = -errno; |
| ALOGE("channel '%s' ~ Could not create socket pair. errno=%d", |
| name.string(), errno); |
| outServerChannel.clear(); |
| outClientChannel.clear(); |
| return result; |
| } |
| |
| int bufferSize = SOCKET_BUFFER_SIZE; |
| setsockopt(sockets[0], SOL_SOCKET, SO_SNDBUF, &bufferSize, sizeof(bufferSize)); |
| setsockopt(sockets[0], SOL_SOCKET, SO_RCVBUF, &bufferSize, sizeof(bufferSize)); |
| setsockopt(sockets[1], SOL_SOCKET, SO_SNDBUF, &bufferSize, sizeof(bufferSize)); |
| setsockopt(sockets[1], SOL_SOCKET, SO_RCVBUF, &bufferSize, sizeof(bufferSize)); |
| |
| String8 serverChannelName = name; |
| serverChannelName.append(" (server)"); |
| outServerChannel = new InputChannel(serverChannelName, sockets[0]); |
| |
| String8 clientChannelName = name; |
| clientChannelName.append(" (client)"); |
| outClientChannel = new InputChannel(clientChannelName, sockets[1]); |
| return OK; |
| } |
| |
| status_t InputChannel::sendMessage(const InputMessage* msg) { |
| size_t msgLength = msg->size(); |
| ssize_t nWrite; |
| do { |
| nWrite = ::send(mFd, msg, msgLength, MSG_DONTWAIT | MSG_NOSIGNAL); |
| } while (nWrite == -1 && errno == EINTR); |
| |
| if (nWrite < 0) { |
| int error = errno; |
| #if DEBUG_CHANNEL_MESSAGES |
| ALOGD("channel '%s' ~ error sending message of type %d, errno=%d", mName.string(), |
| msg->header.type, error); |
| #endif |
| if (error == EAGAIN || error == EWOULDBLOCK) { |
| return WOULD_BLOCK; |
| } |
| if (error == EPIPE || error == ENOTCONN) { |
| return DEAD_OBJECT; |
| } |
| return -error; |
| } |
| |
| if (size_t(nWrite) != msgLength) { |
| #if DEBUG_CHANNEL_MESSAGES |
| ALOGD("channel '%s' ~ error sending message type %d, send was incomplete", |
| mName.string(), msg->header.type); |
| #endif |
| return DEAD_OBJECT; |
| } |
| |
| #if DEBUG_CHANNEL_MESSAGES |
| ALOGD("channel '%s' ~ sent message of type %d", mName.string(), msg->header.type); |
| #endif |
| return OK; |
| } |
| |
| status_t InputChannel::receiveMessage(InputMessage* msg) { |
| ssize_t nRead; |
| do { |
| nRead = ::recv(mFd, msg, sizeof(InputMessage), MSG_DONTWAIT); |
| } while (nRead == -1 && errno == EINTR); |
| |
| if (nRead < 0) { |
| int error = errno; |
| #if DEBUG_CHANNEL_MESSAGES |
| ALOGD("channel '%s' ~ receive message failed, errno=%d", mName.string(), errno); |
| #endif |
| if (error == EAGAIN || error == EWOULDBLOCK) { |
| return WOULD_BLOCK; |
| } |
| if (error == EPIPE || error == ENOTCONN) { |
| return DEAD_OBJECT; |
| } |
| return -error; |
| } |
| |
| if (nRead == 0) { // check for EOF |
| #if DEBUG_CHANNEL_MESSAGES |
| ALOGD("channel '%s' ~ receive message failed because peer was closed", mName.string()); |
| #endif |
| return DEAD_OBJECT; |
| } |
| |
| if (!msg->isValid(nRead)) { |
| #if DEBUG_CHANNEL_MESSAGES |
| ALOGD("channel '%s' ~ received invalid message", mName.string()); |
| #endif |
| return BAD_VALUE; |
| } |
| |
| #if DEBUG_CHANNEL_MESSAGES |
| ALOGD("channel '%s' ~ received message of type %d", mName.string(), msg->header.type); |
| #endif |
| return OK; |
| } |
| |
| |
| // --- InputPublisher --- |
| |
| InputPublisher::InputPublisher(const sp<InputChannel>& channel) : |
| mChannel(channel) { |
| } |
| |
| InputPublisher::~InputPublisher() { |
| } |
| |
| status_t InputPublisher::publishKeyEvent( |
| int32_t deviceId, |
| int32_t source, |
| int32_t action, |
| int32_t flags, |
| int32_t keyCode, |
| int32_t scanCode, |
| int32_t metaState, |
| int32_t repeatCount, |
| nsecs_t downTime, |
| nsecs_t eventTime) { |
| #if DEBUG_TRANSPORT_ACTIONS |
| ALOGD("channel '%s' publisher ~ publishKeyEvent: deviceId=%d, source=0x%x, " |
| "action=0x%x, flags=0x%x, keyCode=%d, scanCode=%d, metaState=0x%x, repeatCount=%d," |
| "downTime=%lld, eventTime=%lld", |
| mChannel->getName().string(), |
| deviceId, source, action, flags, keyCode, scanCode, metaState, repeatCount, |
| downTime, eventTime); |
| #endif |
| |
| InputMessage msg; |
| msg.header.type = InputMessage::TYPE_KEY; |
| msg.body.key.deviceId = deviceId; |
| msg.body.key.source = source; |
| msg.body.key.action = action; |
| msg.body.key.flags = flags; |
| msg.body.key.keyCode = keyCode; |
| msg.body.key.scanCode = scanCode; |
| msg.body.key.metaState = metaState; |
| msg.body.key.repeatCount = repeatCount; |
| msg.body.key.downTime = downTime; |
| msg.body.key.eventTime = eventTime; |
| return mChannel->sendMessage(&msg); |
| } |
| |
| status_t InputPublisher::publishMotionEvent( |
| int32_t deviceId, |
| int32_t source, |
| int32_t action, |
| int32_t flags, |
| int32_t edgeFlags, |
| int32_t metaState, |
| int32_t buttonState, |
| float xOffset, |
| float yOffset, |
| float xPrecision, |
| float yPrecision, |
| nsecs_t downTime, |
| nsecs_t eventTime, |
| size_t pointerCount, |
| const PointerProperties* pointerProperties, |
| const PointerCoords* pointerCoords) { |
| #if DEBUG_TRANSPORT_ACTIONS |
| ALOGD("channel '%s' publisher ~ publishMotionEvent: deviceId=%d, source=0x%x, " |
| "action=0x%x, flags=0x%x, edgeFlags=0x%x, metaState=0x%x, buttonState=0x%x, " |
| "xOffset=%f, yOffset=%f, " |
| "xPrecision=%f, yPrecision=%f, downTime=%lld, eventTime=%lld, " |
| "pointerCount=%d", |
| mChannel->getName().string(), |
| deviceId, source, action, flags, edgeFlags, metaState, buttonState, |
| xOffset, yOffset, xPrecision, yPrecision, downTime, eventTime, pointerCount); |
| #endif |
| |
| if (pointerCount > MAX_POINTERS || pointerCount < 1) { |
| ALOGE("channel '%s' publisher ~ Invalid number of pointers provided: %d.", |
| mChannel->getName().string(), pointerCount); |
| return BAD_VALUE; |
| } |
| |
| InputMessage msg; |
| msg.header.type = InputMessage::TYPE_MOTION; |
| msg.body.motion.deviceId = deviceId; |
| msg.body.motion.source = source; |
| msg.body.motion.action = action; |
| msg.body.motion.flags = flags; |
| msg.body.motion.edgeFlags = edgeFlags; |
| msg.body.motion.metaState = metaState; |
| msg.body.motion.buttonState = buttonState; |
| msg.body.motion.xOffset = xOffset; |
| msg.body.motion.yOffset = yOffset; |
| msg.body.motion.xPrecision = xPrecision; |
| msg.body.motion.yPrecision = yPrecision; |
| msg.body.motion.downTime = downTime; |
| msg.body.motion.eventTime = eventTime; |
| msg.body.motion.pointerCount = pointerCount; |
| for (size_t i = 0; i < pointerCount; i++) { |
| msg.body.motion.pointers[i].properties.copyFrom(pointerProperties[i]); |
| msg.body.motion.pointers[i].coords.copyFrom(pointerCoords[i]); |
| } |
| return mChannel->sendMessage(&msg); |
| } |
| |
| status_t InputPublisher::receiveFinishedSignal(bool* outHandled) { |
| #if DEBUG_TRANSPORT_ACTIONS |
| ALOGD("channel '%s' publisher ~ receiveFinishedSignal", |
| mChannel->getName().string()); |
| #endif |
| |
| InputMessage msg; |
| status_t result = mChannel->receiveMessage(&msg); |
| if (result) { |
| *outHandled = false; |
| return result; |
| } |
| if (msg.header.type != InputMessage::TYPE_FINISHED) { |
| ALOGE("channel '%s' publisher ~ Received unexpected message of type %d from consumer", |
| mChannel->getName().string(), msg.header.type); |
| return UNKNOWN_ERROR; |
| } |
| *outHandled = msg.body.finished.handled; |
| return OK; |
| } |
| |
| // --- InputConsumer --- |
| |
| InputConsumer::InputConsumer(const sp<InputChannel>& channel) : |
| mChannel(channel) { |
| } |
| |
| InputConsumer::~InputConsumer() { |
| } |
| |
| status_t InputConsumer::consume(InputEventFactoryInterface* factory, InputEvent** outEvent) { |
| #if DEBUG_TRANSPORT_ACTIONS |
| ALOGD("channel '%s' consumer ~ consume", |
| mChannel->getName().string()); |
| #endif |
| |
| *outEvent = NULL; |
| |
| InputMessage msg; |
| status_t result = mChannel->receiveMessage(&msg); |
| if (result) { |
| return result; |
| } |
| |
| switch (msg.header.type) { |
| case InputMessage::TYPE_KEY: { |
| KeyEvent* keyEvent = factory->createKeyEvent(); |
| if (!keyEvent) return NO_MEMORY; |
| |
| keyEvent->initialize( |
| msg.body.key.deviceId, |
| msg.body.key.source, |
| msg.body.key.action, |
| msg.body.key.flags, |
| msg.body.key.keyCode, |
| msg.body.key.scanCode, |
| msg.body.key.metaState, |
| msg.body.key.repeatCount, |
| msg.body.key.downTime, |
| msg.body.key.eventTime); |
| *outEvent = keyEvent; |
| break; |
| } |
| |
| case AINPUT_EVENT_TYPE_MOTION: { |
| MotionEvent* motionEvent = factory->createMotionEvent(); |
| if (! motionEvent) return NO_MEMORY; |
| |
| size_t pointerCount = msg.body.motion.pointerCount; |
| PointerProperties pointerProperties[pointerCount]; |
| PointerCoords pointerCoords[pointerCount]; |
| for (size_t i = 0; i < pointerCount; i++) { |
| pointerProperties[i].copyFrom(msg.body.motion.pointers[i].properties); |
| pointerCoords[i].copyFrom(msg.body.motion.pointers[i].coords); |
| } |
| |
| motionEvent->initialize( |
| msg.body.motion.deviceId, |
| msg.body.motion.source, |
| msg.body.motion.action, |
| msg.body.motion.flags, |
| msg.body.motion.edgeFlags, |
| msg.body.motion.metaState, |
| msg.body.motion.buttonState, |
| msg.body.motion.xOffset, |
| msg.body.motion.yOffset, |
| msg.body.motion.xPrecision, |
| msg.body.motion.yPrecision, |
| msg.body.motion.downTime, |
| msg.body.motion.eventTime, |
| pointerCount, |
| pointerProperties, |
| pointerCoords); |
| *outEvent = motionEvent; |
| break; |
| } |
| |
| default: |
| ALOGE("channel '%s' consumer ~ Received unexpected message of type %d", |
| mChannel->getName().string(), msg.header.type); |
| return UNKNOWN_ERROR; |
| } |
| |
| return OK; |
| } |
| |
| status_t InputConsumer::sendFinishedSignal(bool handled) { |
| #if DEBUG_TRANSPORT_ACTIONS |
| ALOGD("channel '%s' consumer ~ sendFinishedSignal: handled=%d", |
| mChannel->getName().string(), handled); |
| #endif |
| |
| InputMessage msg; |
| msg.header.type = InputMessage::TYPE_FINISHED; |
| msg.body.finished.handled = handled; |
| return mChannel->sendMessage(&msg); |
| } |
| |
| } // namespace android |