The Tor Browser: widget/gonk/libui/EventHub.cpp@fc2d59ddac77 (annotated)

widget/gonk/libui/EventHub.cpp@fc2d59ddac77 (annotated)

widget/gonk/libui/EventHub.cpp

Wed, 31 Dec 2014 07:22:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:22:50 +0100
branch: TOR_BUG_3246
changeset 4: fc2d59ddac77
permissions: -rw-r--r--

Correct previous dual key logic pending first delivery installment.

 /*
  * Copyright (C) 2005 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 #define LOG_TAG "EventHub"
 // #define LOG_NDEBUG 0
 #include "cutils_log.h"
 #include "EventHub.h"
 #include <hardware_legacy/power.h>
 #include <cutils/properties.h>
 #include "cutils_log.h"
 #include <utils/Timers.h>
 #include <utils/threads.h>
 #include <utils/Errors.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <memory.h>
 #include <errno.h>
 #include <assert.h>
 #include "KeyLayoutMap.h"
 #include "KeyCharacterMap.h"
 #include "VirtualKeyMap.h"
 #include <string.h>
 #include <stdint.h>
 #include <dirent.h>
 #include <sys/inotify.h>
 #include <sys/epoll.h>
 #include <sys/ioctl.h>
 #include <sys/limits.h>
 #include <sha1.h>
 /* this macro is used to tell if "bit" is set in "array"
  * it selects a byte from the array, and does a boolean AND
  * operation with a byte that only has the relevant bit set.
  * eg. to check for the 12th bit, we do (array[1] & 1<<4)
  */
 #define test_bit(bit, array)    (array[bit/8] & (1<<(bit%8)))
 /* this macro computes the number of bytes needed to represent a bit array of the specified size */
 #define sizeof_bit_array(bits)  ((bits + 7) / 8)
 #define INDENT "  "
 #define INDENT2 "    "
 #define INDENT3 "      "
 namespace android {
 static const char *WAKE_LOCK_ID = "KeyEvents";
 static const char *DEVICE_PATH = "/dev/input";
 /* return the larger integer */
 static inline int max(int v1, int v2)
 {
     return (v1 > v2) ? v1 : v2;
 }
 static inline const char* toString(bool value) {
     return value ? "true" : "false";
 }
 static String8 sha1(const String8& in) {
     SHA1_CTX ctx;
     SHA1Init(&ctx);
     SHA1Update(&ctx, reinterpret_cast<const u_char*>(in.string()), in.size());
     u_char digest[SHA1_DIGEST_LENGTH];
     SHA1Final(digest, &ctx);
     String8 out;
     for (size_t i = 0; i < SHA1_DIGEST_LENGTH; i++) {
         out.appendFormat("%02x", digest[i]);
     }
     return out;
 }
 static void setDescriptor(InputDeviceIdentifier& identifier) {
     // Compute a device descriptor that uniquely identifies the device.
     // The descriptor is assumed to be a stable identifier.  Its value should not
     // change between reboots, reconnections, firmware updates or new releases of Android.
     // Ideally, we also want the descriptor to be short and relatively opaque.
     String8 rawDescriptor;
     rawDescriptor.appendFormat(":%04x:%04x:", identifier.vendor, identifier.product);
     if (!identifier.uniqueId.isEmpty()) {
         rawDescriptor.append("uniqueId:");
         rawDescriptor.append(identifier.uniqueId);
     } if (identifier.vendor == 0 && identifier.product == 0) {
         // If we don't know the vendor and product id, then the device is probably
         // built-in so we need to rely on other information to uniquely identify
         // the input device.  Usually we try to avoid relying on the device name or
         // location but for built-in input device, they are unlikely to ever change.
         if (!identifier.name.isEmpty()) {
             rawDescriptor.append("name:");
             rawDescriptor.append(identifier.name);
         } else if (!identifier.location.isEmpty()) {
             rawDescriptor.append("location:");
             rawDescriptor.append(identifier.location);
         }
     }
     identifier.descriptor = sha1(rawDescriptor);
     ALOGV("Created descriptor: raw=%s, cooked=%s", rawDescriptor.string(),
             identifier.descriptor.string());
 }
 // --- Global Functions ---
 uint32_t getAbsAxisUsage(int32_t axis, uint32_t deviceClasses) {
     // Touch devices get dibs on touch-related axes.
     if (deviceClasses & INPUT_DEVICE_CLASS_TOUCH) {
         switch (axis) {
         case ABS_X:
         case ABS_Y:
         case ABS_PRESSURE:
         case ABS_TOOL_WIDTH:
         case ABS_DISTANCE:
         case ABS_TILT_X:
         case ABS_TILT_Y:
         case ABS_MT_SLOT:
         case ABS_MT_TOUCH_MAJOR:
         case ABS_MT_TOUCH_MINOR:
         case ABS_MT_WIDTH_MAJOR:
         case ABS_MT_WIDTH_MINOR:
         case ABS_MT_ORIENTATION:
         case ABS_MT_POSITION_X:
         case ABS_MT_POSITION_Y:
         case ABS_MT_TOOL_TYPE:
         case ABS_MT_BLOB_ID:
         case ABS_MT_TRACKING_ID:
         case ABS_MT_PRESSURE:
         case ABS_MT_DISTANCE:
             return INPUT_DEVICE_CLASS_TOUCH;
         }
     }
     // Joystick devices get the rest.
     return deviceClasses & INPUT_DEVICE_CLASS_JOYSTICK;
 }
 // --- EventHub::Device ---
 EventHub::Device::Device(int fd, int32_t id, const String8& path,
         const InputDeviceIdentifier& identifier) :
         next(NULL),
         fd(fd), id(id), path(path), identifier(identifier),
         classes(0), configuration(NULL), virtualKeyMap(NULL),
         ffEffectPlaying(false), ffEffectId(-1),
         timestampOverrideSec(0), timestampOverrideUsec(0) {
     memset(keyBitmask, 0, sizeof(keyBitmask));
     memset(absBitmask, 0, sizeof(absBitmask));
     memset(relBitmask, 0, sizeof(relBitmask));
     memset(swBitmask, 0, sizeof(swBitmask));
     memset(ledBitmask, 0, sizeof(ledBitmask));
     memset(ffBitmask, 0, sizeof(ffBitmask));
     memset(propBitmask, 0, sizeof(propBitmask));
 }
 EventHub::Device::~Device() {
     close();
     delete configuration;
     delete virtualKeyMap;
 }
 void EventHub::Device::close() {
     if (fd >= 0) {
         ::close(fd);
         fd = -1;
     }
 }
 // --- EventHub ---
 const uint32_t EventHub::EPOLL_ID_INOTIFY;
 const uint32_t EventHub::EPOLL_ID_WAKE;
 const int EventHub::EPOLL_SIZE_HINT;
 const int EventHub::EPOLL_MAX_EVENTS;
 EventHub::EventHub(void) :
         mBuiltInKeyboardId(NO_BUILT_IN_KEYBOARD), mNextDeviceId(1),
         mOpeningDevices(0), mClosingDevices(0),
         mNeedToSendFinishedDeviceScan(false),
         mNeedToReopenDevices(false), mNeedToScanDevices(true),
         mPendingEventCount(0), mPendingEventIndex(0), mPendingINotify(false) {
     acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID);
     mEpollFd = epoll_create(EPOLL_SIZE_HINT);
     LOG_ALWAYS_FATAL_IF(mEpollFd < 0, "Could not create epoll instance.  errno=%d", errno);
     mINotifyFd = inotify_init();
     int result = inotify_add_watch(mINotifyFd, DEVICE_PATH, IN_DELETE | IN_CREATE);
     LOG_ALWAYS_FATAL_IF(result < 0, "Could not register INotify for %s.  errno=%d",
             DEVICE_PATH, errno);
     struct epoll_event eventItem;
     memset(&eventItem, 0, sizeof(eventItem));
     eventItem.events = EPOLLIN;
     eventItem.data.u32 = EPOLL_ID_INOTIFY;
     result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mINotifyFd, &eventItem);
     LOG_ALWAYS_FATAL_IF(result != 0, "Could not add INotify to epoll instance.  errno=%d", errno);
     int wakeFds[2];
     result = pipe(wakeFds);
     LOG_ALWAYS_FATAL_IF(result != 0, "Could not create wake pipe.  errno=%d", errno);
     mWakeReadPipeFd = wakeFds[0];
     mWakeWritePipeFd = wakeFds[1];
     result = fcntl(mWakeReadPipeFd, F_SETFL, O_NONBLOCK);
     LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake read pipe non-blocking.  errno=%d",
             errno);
     result = fcntl(mWakeWritePipeFd, F_SETFL, O_NONBLOCK);
     LOG_ALWAYS_FATAL_IF(result != 0, "Could not make wake write pipe non-blocking.  errno=%d",
             errno);
     eventItem.data.u32 = EPOLL_ID_WAKE;
     result = epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mWakeReadPipeFd, &eventItem);
     LOG_ALWAYS_FATAL_IF(result != 0, "Could not add wake read pipe to epoll instance.  errno=%d",
             errno);
 }
 EventHub::~EventHub(void) {
     closeAllDevicesLocked();
     while (mClosingDevices) {
         Device* device = mClosingDevices;
         mClosingDevices = device->next;
         delete device;
     }
     ::close(mEpollFd);
     ::close(mINotifyFd);
     ::close(mWakeReadPipeFd);
     ::close(mWakeWritePipeFd);
     release_wake_lock(WAKE_LOCK_ID);
 }
 InputDeviceIdentifier EventHub::getDeviceIdentifier(int32_t deviceId) const {
     AutoMutex _l(mLock);
     Device* device = getDeviceLocked(deviceId);
     if (device == NULL) return InputDeviceIdentifier();
     return device->identifier;
 }
 uint32_t EventHub::getDeviceClasses(int32_t deviceId) const {
     AutoMutex _l(mLock);
     Device* device = getDeviceLocked(deviceId);
     if (device == NULL) return 0;
     return device->classes;
 }
 void EventHub::getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const {
     AutoMutex _l(mLock);
     Device* device = getDeviceLocked(deviceId);
     if (device && device->configuration) {
         *outConfiguration = *device->configuration;
     } else {
         outConfiguration->clear();
     }
 }
 status_t EventHub::getAbsoluteAxisInfo(int32_t deviceId, int axis,
         RawAbsoluteAxisInfo* outAxisInfo) const {
     outAxisInfo->clear();
     if (axis >= 0 && axis <= ABS_MAX) {
         AutoMutex _l(mLock);
         Device* device = getDeviceLocked(deviceId);
         if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) {
             struct input_absinfo info;
             if(ioctl(device->fd, EVIOCGABS(axis), &info)) {
                 ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d",
                      axis, device->identifier.name.string(), device->fd, errno);
                 return -errno;
             }
             if (info.minimum != info.maximum) {
                 outAxisInfo->valid = true;
                 outAxisInfo->minValue = info.minimum;
                 outAxisInfo->maxValue = info.maximum;
                 outAxisInfo->flat = info.flat;
                 outAxisInfo->fuzz = info.fuzz;
                 outAxisInfo->resolution = info.resolution;
             }
             return OK;
         }
     }
     return -1;
 }
 bool EventHub::hasRelativeAxis(int32_t deviceId, int axis) const {
     if (axis >= 0 && axis <= REL_MAX) {
         AutoMutex _l(mLock);
         Device* device = getDeviceLocked(deviceId);
         if (device) {
             return test_bit(axis, device->relBitmask);
         }
     }
     return false;
 }
 bool EventHub::hasInputProperty(int32_t deviceId, int property) const {
     if (property >= 0 && property <= INPUT_PROP_MAX) {
         AutoMutex _l(mLock);
         Device* device = getDeviceLocked(deviceId);
         if (device) {
             return test_bit(property, device->propBitmask);
         }
     }
     return false;
 }
 int32_t EventHub::getScanCodeState(int32_t deviceId, int32_t scanCode) const {
     if (scanCode >= 0 && scanCode <= KEY_MAX) {
         AutoMutex _l(mLock);
         Device* device = getDeviceLocked(deviceId);
         if (device && !device->isVirtual() && test_bit(scanCode, device->keyBitmask)) {
             uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)];
             memset(keyState, 0, sizeof(keyState));
             if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) {
                 return test_bit(scanCode, keyState) ? AKEY_STATE_DOWN : AKEY_STATE_UP;
             }
         }
     }
     return AKEY_STATE_UNKNOWN;
 }
 int32_t EventHub::getKeyCodeState(int32_t deviceId, int32_t keyCode) const {
     AutoMutex _l(mLock);
     Device* device = getDeviceLocked(deviceId);
     if (device && !device->isVirtual() && device->keyMap.haveKeyLayout()) {
         Vector<int32_t> scanCodes;
         device->keyMap.keyLayoutMap->findScanCodesForKey(keyCode, &scanCodes);
         if (scanCodes.size() != 0) {
             uint8_t keyState[sizeof_bit_array(KEY_MAX + 1)];
             memset(keyState, 0, sizeof(keyState));
             if (ioctl(device->fd, EVIOCGKEY(sizeof(keyState)), keyState) >= 0) {
                 for (size_t i = 0; i < scanCodes.size(); i++) {
                     int32_t sc = scanCodes.itemAt(i);
                     if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, keyState)) {
                         return AKEY_STATE_DOWN;
                     }
                 }
                 return AKEY_STATE_UP;
             }
         }
     }
     return AKEY_STATE_UNKNOWN;
 }
 int32_t EventHub::getSwitchState(int32_t deviceId, int32_t sw) const {
     if (sw >= 0 && sw <= SW_MAX) {
         AutoMutex _l(mLock);
         Device* device = getDeviceLocked(deviceId);
         if (device && !device->isVirtual() && test_bit(sw, device->swBitmask)) {
             uint8_t swState[sizeof_bit_array(SW_MAX + 1)];
             memset(swState, 0, sizeof(swState));
             if (ioctl(device->fd, EVIOCGSW(sizeof(swState)), swState) >= 0) {
                 return test_bit(sw, swState) ? AKEY_STATE_DOWN : AKEY_STATE_UP;
             }
         }
     }
     return AKEY_STATE_UNKNOWN;
 }
 status_t EventHub::getAbsoluteAxisValue(int32_t deviceId, int32_t axis, int32_t* outValue) const {
     *outValue = 0;
     if (axis >= 0 && axis <= ABS_MAX) {
         AutoMutex _l(mLock);
         Device* device = getDeviceLocked(deviceId);
         if (device && !device->isVirtual() && test_bit(axis, device->absBitmask)) {
             struct input_absinfo info;
             if(ioctl(device->fd, EVIOCGABS(axis), &info)) {
                 ALOGW("Error reading absolute controller %d for device %s fd %d, errno=%d",
                      axis, device->identifier.name.string(), device->fd, errno);
                 return -errno;
             }
             *outValue = info.value;
             return OK;
         }
     }
     return -1;
 }
 bool EventHub::markSupportedKeyCodes(int32_t deviceId, size_t numCodes,
         const int32_t* keyCodes, uint8_t* outFlags) const {
     AutoMutex _l(mLock);
     Device* device = getDeviceLocked(deviceId);
     if (device && device->keyMap.haveKeyLayout()) {
         Vector<int32_t> scanCodes;
         for (size_t codeIndex = 0; codeIndex < numCodes; codeIndex++) {
             scanCodes.clear();
             status_t err = device->keyMap.keyLayoutMap->findScanCodesForKey(
                     keyCodes[codeIndex], &scanCodes);
             if (! err) {
                 // check the possible scan codes identified by the layout map against the
                 // map of codes actually emitted by the driver
                 for (size_t sc = 0; sc < scanCodes.size(); sc++) {
                     if (test_bit(scanCodes[sc], device->keyBitmask)) {
                         outFlags[codeIndex] = 1;
                         break;
                     }
                 }
             }
         }
         return true;
     }
     return false;
 }
 status_t EventHub::mapKey(int32_t deviceId, int32_t scanCode, int32_t usageCode,
         int32_t* outKeycode, uint32_t* outFlags) const {
     AutoMutex _l(mLock);
     Device* device = getDeviceLocked(deviceId);
     if (device) {
         // Check the key character map first.
         sp<KeyCharacterMap> kcm = device->getKeyCharacterMap();
         if (kcm != NULL) {
             if (!kcm->mapKey(scanCode, usageCode, outKeycode)) {
                 *outFlags = 0;
                 return NO_ERROR;
             }
         }
         // Check the key layout next.
         if (device->keyMap.haveKeyLayout()) {
             if (!device->keyMap.keyLayoutMap->mapKey(
                     scanCode, usageCode, outKeycode, outFlags)) {
                 return NO_ERROR;
             }
         }
     }
     *outKeycode = 0;
     *outFlags = 0;
     return NAME_NOT_FOUND;
 }
 status_t EventHub::mapAxis(int32_t deviceId, int32_t scanCode, AxisInfo* outAxisInfo) const {
     AutoMutex _l(mLock);
     Device* device = getDeviceLocked(deviceId);
     if (device && device->keyMap.haveKeyLayout()) {
         status_t err = device->keyMap.keyLayoutMap->mapAxis(scanCode, outAxisInfo);
         if (err == NO_ERROR) {
             return NO_ERROR;
         }
     }
     return NAME_NOT_FOUND;
 }
 void EventHub::setExcludedDevices(const Vector<String8>& devices) {
     AutoMutex _l(mLock);
     mExcludedDevices = devices;
 }
 bool EventHub::hasScanCode(int32_t deviceId, int32_t scanCode) const {
     AutoMutex _l(mLock);
     Device* device = getDeviceLocked(deviceId);
     if (device && scanCode >= 0 && scanCode <= KEY_MAX) {
         if (test_bit(scanCode, device->keyBitmask)) {
             return true;
         }
     }
     return false;
 }
 bool EventHub::hasLed(int32_t deviceId, int32_t led) const {
     AutoMutex _l(mLock);
     Device* device = getDeviceLocked(deviceId);
     if (device && led >= 0 && led <= LED_MAX) {
         if (test_bit(led, device->ledBitmask)) {
             return true;
         }
     }
     return false;
 }
 void EventHub::setLedState(int32_t deviceId, int32_t led, bool on) {
     AutoMutex _l(mLock);
     Device* device = getDeviceLocked(deviceId);
     if (device && !device->isVirtual() && led >= 0 && led <= LED_MAX) {
         struct input_event ev;
         ev.time.tv_sec = 0;
         ev.time.tv_usec = 0;
         ev.type = EV_LED;
         ev.code = led;
         ev.value = on ? 1 : 0;
         ssize_t nWrite;
         do {
             nWrite = write(device->fd, &ev, sizeof(struct input_event));
         } while (nWrite == -1 && errno == EINTR);
     }
 }
 void EventHub::getVirtualKeyDefinitions(int32_t deviceId,
         Vector<VirtualKeyDefinition>& outVirtualKeys) const {
     outVirtualKeys.clear();
     AutoMutex _l(mLock);
     Device* device = getDeviceLocked(deviceId);
     if (device && device->virtualKeyMap) {
         outVirtualKeys.appendVector(device->virtualKeyMap->getVirtualKeys());
     }
 }
 sp<KeyCharacterMap> EventHub::getKeyCharacterMap(int32_t deviceId) const {
     AutoMutex _l(mLock);
     Device* device = getDeviceLocked(deviceId);
     if (device) {
         return device->getKeyCharacterMap();
     }
     return NULL;
 }
 bool EventHub::setKeyboardLayoutOverlay(int32_t deviceId,
         const sp<KeyCharacterMap>& map) {
     AutoMutex _l(mLock);
     Device* device = getDeviceLocked(deviceId);
     if (device) {
         if (map != device->overlayKeyMap) {
             device->overlayKeyMap = map;
             device->combinedKeyMap = KeyCharacterMap::combine(
                     device->keyMap.keyCharacterMap, map);
             return true;
         }
     }
     return false;
 }
 void EventHub::vibrate(int32_t deviceId, nsecs_t duration) {
     AutoMutex _l(mLock);
     Device* device = getDeviceLocked(deviceId);
     if (device && !device->isVirtual()) {
         ff_effect effect;
         memset(&effect, 0, sizeof(effect));
         effect.type = FF_RUMBLE;
         effect.id = device->ffEffectId;
         effect.u.rumble.strong_magnitude = 0xc000;
         effect.u.rumble.weak_magnitude = 0xc000;
         effect.replay.length = (duration + 999999LL) / 1000000LL;
         effect.replay.delay = 0;
         if (ioctl(device->fd, EVIOCSFF, &effect)) {
             ALOGW("Could not upload force feedback effect to device %s due to error %d.",
                     device->identifier.name.string(), errno);
             return;
         }
         device->ffEffectId = effect.id;
         struct input_event ev;
         ev.time.tv_sec = 0;
         ev.time.tv_usec = 0;
         ev.type = EV_FF;
         ev.code = device->ffEffectId;
         ev.value = 1;
         if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) {
             ALOGW("Could not start force feedback effect on device %s due to error %d.",
                     device->identifier.name.string(), errno);
             return;
         }
         device->ffEffectPlaying = true;
     }
 }
 void EventHub::cancelVibrate(int32_t deviceId) {
     AutoMutex _l(mLock);
     Device* device = getDeviceLocked(deviceId);
     if (device && !device->isVirtual()) {
         if (device->ffEffectPlaying) {
             device->ffEffectPlaying = false;
             struct input_event ev;
             ev.time.tv_sec = 0;
             ev.time.tv_usec = 0;
             ev.type = EV_FF;
             ev.code = device->ffEffectId;
             ev.value = 0;
             if (write(device->fd, &ev, sizeof(ev)) != sizeof(ev)) {
                 ALOGW("Could not stop force feedback effect on device %s due to error %d.",
                         device->identifier.name.string(), errno);
                 return;
             }
         }
     }
 }
 EventHub::Device* EventHub::getDeviceLocked(int32_t deviceId) const {
     if (deviceId == BUILT_IN_KEYBOARD_ID) {
         deviceId = mBuiltInKeyboardId;
     }
     ssize_t index = mDevices.indexOfKey(deviceId);
     return index >= 0 ? mDevices.valueAt(index) : NULL;
 }
 EventHub::Device* EventHub::getDeviceByPathLocked(const char* devicePath) const {
     for (size_t i = 0; i < mDevices.size(); i++) {
         Device* device = mDevices.valueAt(i);
         if (device->path == devicePath) {
             return device;
         }
     }
     return NULL;
 }
 size_t EventHub::getEvents(int timeoutMillis, RawEvent* buffer, size_t bufferSize) {
     ALOG_ASSERT(bufferSize >= 1);
     AutoMutex _l(mLock);
     struct input_event readBuffer[bufferSize];
     RawEvent* event = buffer;
     size_t capacity = bufferSize;
     bool awoken = false;
     for (;;) {
         nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
         // Reopen input devices if needed.
         if (mNeedToReopenDevices) {
             mNeedToReopenDevices = false;
             ALOGI("Reopening all input devices due to a configuration change.");
             closeAllDevicesLocked();
             mNeedToScanDevices = true;
             break; // return to the caller before we actually rescan
         }
         // Report any devices that had last been added/removed.
         while (mClosingDevices) {
             Device* device = mClosingDevices;
             ALOGV("Reporting device closed: id=%d, name=%s\n",
                  device->id, device->path.string());
             mClosingDevices = device->next;
             event->when = now;
             event->deviceId = device->id == mBuiltInKeyboardId ? BUILT_IN_KEYBOARD_ID : device->id;
             event->type = DEVICE_REMOVED;
             event += 1;
             delete device;
             mNeedToSendFinishedDeviceScan = true;
             if (--capacity == 0) {
                 break;
             }
         }
         if (mNeedToScanDevices) {
             mNeedToScanDevices = false;
             scanDevicesLocked();
             mNeedToSendFinishedDeviceScan = true;
         }
         while (mOpeningDevices != NULL) {
             Device* device = mOpeningDevices;
             ALOGV("Reporting device opened: id=%d, name=%s\n",
                  device->id, device->path.string());
             mOpeningDevices = device->next;
             event->when = now;
             event->deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id;
             event->type = DEVICE_ADDED;
             event += 1;
             mNeedToSendFinishedDeviceScan = true;
             if (--capacity == 0) {
                 break;
             }
         }
         if (mNeedToSendFinishedDeviceScan) {
             mNeedToSendFinishedDeviceScan = false;
             event->when = now;
             event->type = FINISHED_DEVICE_SCAN;
             event += 1;
             if (--capacity == 0) {
                 break;
             }
         }
         // Grab the next input event.
         bool deviceChanged = false;
         while (mPendingEventIndex < mPendingEventCount) {
             const struct epoll_event& eventItem = mPendingEventItems[mPendingEventIndex++];
             if (eventItem.data.u32 == EPOLL_ID_INOTIFY) {
                 if (eventItem.events & EPOLLIN) {
                     mPendingINotify = true;
                 } else {
                     ALOGW("Received unexpected epoll event 0x%08x for INotify.", eventItem.events);
                 }
                 continue;
             }
             if (eventItem.data.u32 == EPOLL_ID_WAKE) {
                 if (eventItem.events & EPOLLIN) {
                     ALOGV("awoken after wake()");
                     awoken = true;
                     char buffer[16];
                     ssize_t nRead;
                     do {
                         nRead = read(mWakeReadPipeFd, buffer, sizeof(buffer));
                     } while ((nRead == -1 && errno == EINTR) || nRead == sizeof(buffer));
                 } else {
                     ALOGW("Received unexpected epoll event 0x%08x for wake read pipe.",
                             eventItem.events);
                 }
                 continue;
             }
             ssize_t deviceIndex = mDevices.indexOfKey(eventItem.data.u32);
             if (deviceIndex < 0) {
                 ALOGW("Received unexpected epoll event 0x%08x for unknown device id %d.",
                         eventItem.events, eventItem.data.u32);
                 continue;
             }
             Device* device = mDevices.valueAt(deviceIndex);
             if (eventItem.events & EPOLLIN) {
                 int32_t readSize = read(device->fd, readBuffer,
                         sizeof(struct input_event) * capacity);
                 if (readSize == 0 || (readSize < 0 && errno == ENODEV)) {
                     // Device was removed before INotify noticed.
                     ALOGW("could not get event, removed? (fd: %d size: %d bufferSize: %d "
                             "capacity: %d errno: %d)\n",
                             device->fd, readSize, bufferSize, capacity, errno);
                     deviceChanged = true;
                     closeDeviceLocked(device);
                 } else if (readSize < 0) {
                     if (errno != EAGAIN && errno != EINTR) {
                         ALOGW("could not get event (errno=%d)", errno);
                     }
                 } else if ((readSize % sizeof(struct input_event)) != 0) {
                     ALOGE("could not get event (wrong size: %d)", readSize);
                 } else {
                     int32_t deviceId = device->id == mBuiltInKeyboardId ? 0 : device->id;
                     size_t count = size_t(readSize) / sizeof(struct input_event);
                     for (size_t i = 0; i < count; i++) {
                         struct input_event& iev = readBuffer[i];
                         ALOGV("%s got: time=%d.%06d, type=%d, code=%d, value=%d",
                                 device->path.string(),
                                 (int) iev.time.tv_sec, (int) iev.time.tv_usec,
                                 iev.type, iev.code, iev.value);
                         // Some input devices may have a better concept of the time
                         // when an input event was actually generated than the kernel
                         // which simply timestamps all events on entry to evdev.
                         // This is a custom Android extension of the input protocol
                         // mainly intended for use with uinput based device drivers.
                         if (iev.type == EV_MSC) {
                             if (iev.code == MSC_ANDROID_TIME_SEC) {
                                 device->timestampOverrideSec = iev.value;
                                 continue;
                             } else if (iev.code == MSC_ANDROID_TIME_USEC) {
                                 device->timestampOverrideUsec = iev.value;
                                 continue;
                             }
                         }
                         if (device->timestampOverrideSec || device->timestampOverrideUsec) {
                             iev.time.tv_sec = device->timestampOverrideSec;
                             iev.time.tv_usec = device->timestampOverrideUsec;
                             if (iev.type == EV_SYN && iev.code == SYN_REPORT) {
                                 device->timestampOverrideSec = 0;
                                 device->timestampOverrideUsec = 0;
                             }
                             ALOGV("applied override time %d.%06d",
                                     int(iev.time.tv_sec), int(iev.time.tv_usec));
                         }
 #ifdef HAVE_POSIX_CLOCKS
                         // Use the time specified in the event instead of the current time
                         // so that downstream code can get more accurate estimates of
                         // event dispatch latency from the time the event is enqueued onto
                         // the evdev client buffer.
                         //
                         // The event's timestamp fortuitously uses the same monotonic clock
                         // time base as the rest of Android.  The kernel event device driver
                         // (drivers/input/evdev.c) obtains timestamps using ktime_get_ts().
                         // The systemTime(SYSTEM_TIME_MONOTONIC) function we use everywhere
                         // calls clock_gettime(CLOCK_MONOTONIC) which is implemented as a
                         // system call that also queries ktime_get_ts().
                         event->when = nsecs_t(iev.time.tv_sec) * 1000000000LL
                                 + nsecs_t(iev.time.tv_usec) * 1000LL;
                         ALOGV("event time %lld, now %lld", event->when, now);
                         // Bug 7291243: Add a guard in case the kernel generates timestamps
                         // that appear to be far into the future because they were generated
                         // using the wrong clock source.
                         //
                         // This can happen because when the input device is initially opened
                         // it has a default clock source of CLOCK_REALTIME.  Any input events
                         // enqueued right after the device is opened will have timestamps
                         // generated using CLOCK_REALTIME.  We later set the clock source
                         // to CLOCK_MONOTONIC but it is already too late.
                         //
                         // Invalid input event timestamps can result in ANRs, crashes and
                         // and other issues that are hard to track down.  We must not let them
                         // propagate through the system.
                         //
                         // Log a warning so that we notice the problem and recover gracefully.
                         if (event->when >= now + 10 * 1000000000LL) {
                             // Double-check.  Time may have moved on.
                             nsecs_t time = systemTime(SYSTEM_TIME_MONOTONIC);
                             if (event->when > time) {
                                 ALOGW("An input event from %s has a timestamp that appears to "
                                         "have been generated using the wrong clock source "
                                         "(expected CLOCK_MONOTONIC): "
                                         "event time %lld, current time %lld, call time %lld.  "
                                         "Using current time instead.",
                                         device->path.string(), event->when, time, now);
                                 event->when = time;
                             } else {
                                 ALOGV("Event time is ok but failed the fast path and required "
                                         "an extra call to systemTime: "
                                         "event time %lld, current time %lld, call time %lld.",
                                         event->when, time, now);
                             }
                         }
 #else
                         event->when = now;
 #endif
                         event->deviceId = deviceId;
                         event->type = iev.type;
                         event->code = iev.code;
                         event->value = iev.value;
                         event += 1;
                         capacity -= 1;
                     }
                     if (capacity == 0) {
                         // The result buffer is full.  Reset the pending event index
                         // so we will try to read the device again on the next iteration.
                         mPendingEventIndex -= 1;
                         break;
                     }
                 }
             } else if (eventItem.events & EPOLLHUP) {
                 ALOGI("Removing device %s due to epoll hang-up event.",
                         device->identifier.name.string());
                 deviceChanged = true;
                 closeDeviceLocked(device);
             } else {
                 ALOGW("Received unexpected epoll event 0x%08x for device %s.",
                         eventItem.events, device->identifier.name.string());
             }
         }
         // readNotify() will modify the list of devices so this must be done after
         // processing all other events to ensure that we read all remaining events
         // before closing the devices.
         if (mPendingINotify && mPendingEventIndex >= mPendingEventCount) {
             mPendingINotify = false;
             readNotifyLocked();
             deviceChanged = true;
         }
         // Report added or removed devices immediately.
         if (deviceChanged) {
             continue;
         }
         // Return now if we have collected any events or if we were explicitly awoken.
         if (event != buffer || awoken) {
             break;
         }
         // Poll for events.  Mind the wake lock dance!
         // We hold a wake lock at all times except during epoll_wait().  This works due to some
         // subtle choreography.  When a device driver has pending (unread) events, it acquires
         // a kernel wake lock.  However, once the last pending event has been read, the device
         // driver will release the kernel wake lock.  To prevent the system from going to sleep
         // when this happens, the EventHub holds onto its own user wake lock while the client
         // is processing events.  Thus the system can only sleep if there are no events
         // pending or currently being processed.
         //
         // The timeout is advisory only.  If the device is asleep, it will not wake just to
         // service the timeout.
         mPendingEventIndex = 0;
         mLock.unlock(); // release lock before poll, must be before release_wake_lock
         release_wake_lock(WAKE_LOCK_ID);
         int pollResult = epoll_wait(mEpollFd, mPendingEventItems, EPOLL_MAX_EVENTS, timeoutMillis);
         acquire_wake_lock(PARTIAL_WAKE_LOCK, WAKE_LOCK_ID);
         mLock.lock(); // reacquire lock after poll, must be after acquire_wake_lock
         if (pollResult == 0) {
             // Timed out.
             mPendingEventCount = 0;
             break;
         }
         if (pollResult < 0) {
             // An error occurred.
             mPendingEventCount = 0;
             // Sleep after errors to avoid locking up the system.
             // Hopefully the error is transient.
             if (errno != EINTR) {
                 ALOGW("poll failed (errno=%d)\n", errno);
                 usleep(100000);
             }
         } else {
             // Some events occurred.
             mPendingEventCount = size_t(pollResult);
         }
     }
     // All done, return the number of events we read.
     return event - buffer;
 }
 void EventHub::wake() {
     ALOGV("wake() called");
     ssize_t nWrite;
     do {
         nWrite = write(mWakeWritePipeFd, "W", 1);
     } while (nWrite == -1 && errno == EINTR);
     if (nWrite != 1 && errno != EAGAIN) {
         ALOGW("Could not write wake signal, errno=%d", errno);
     }
 }
 void EventHub::scanDevicesLocked() {
     status_t res = scanDirLocked(DEVICE_PATH);
     if(res < 0) {
         ALOGE("scan dir failed for %s\n", DEVICE_PATH);
     }
     if (mDevices.indexOfKey(VIRTUAL_KEYBOARD_ID) < 0) {
         createVirtualKeyboardLocked();
     }
 }
 // ----------------------------------------------------------------------------
 static bool containsNonZeroByte(const uint8_t* array, uint32_t startIndex, uint32_t endIndex) {
     const uint8_t* end = array + endIndex;
     array += startIndex;
     while (array != end) {
         if (*(array++) != 0) {
             return true;
         }
     }
     return false;
 }
 static const int32_t GAMEPAD_KEYCODES[] = {
         AKEYCODE_BUTTON_A, AKEYCODE_BUTTON_B, AKEYCODE_BUTTON_C,
         AKEYCODE_BUTTON_X, AKEYCODE_BUTTON_Y, AKEYCODE_BUTTON_Z,
         AKEYCODE_BUTTON_L1, AKEYCODE_BUTTON_R1,
         AKEYCODE_BUTTON_L2, AKEYCODE_BUTTON_R2,
         AKEYCODE_BUTTON_THUMBL, AKEYCODE_BUTTON_THUMBR,
         AKEYCODE_BUTTON_START, AKEYCODE_BUTTON_SELECT, AKEYCODE_BUTTON_MODE,
         AKEYCODE_BUTTON_1, AKEYCODE_BUTTON_2, AKEYCODE_BUTTON_3, AKEYCODE_BUTTON_4,
         AKEYCODE_BUTTON_5, AKEYCODE_BUTTON_6, AKEYCODE_BUTTON_7, AKEYCODE_BUTTON_8,
         AKEYCODE_BUTTON_9, AKEYCODE_BUTTON_10, AKEYCODE_BUTTON_11, AKEYCODE_BUTTON_12,
         AKEYCODE_BUTTON_13, AKEYCODE_BUTTON_14, AKEYCODE_BUTTON_15, AKEYCODE_BUTTON_16,
 };
 status_t EventHub::openDeviceLocked(const char *devicePath) {
     char buffer[80];
     ALOGV("Opening device: %s", devicePath);
     int fd = open(devicePath, O_RDWR | O_CLOEXEC);
     if(fd < 0) {
         ALOGE("could not open %s, %s\n", devicePath, strerror(errno));
         return -1;
     }
     InputDeviceIdentifier identifier;
     // Get device name.
     if(ioctl(fd, EVIOCGNAME(sizeof(buffer) - 1), &buffer) < 1) {
         //fprintf(stderr, "could not get device name for %s, %s\n", devicePath, strerror(errno));
     } else {
         buffer[sizeof(buffer) - 1] = '\0';
         identifier.name.setTo(buffer);
     }
     // Check to see if the device is on our excluded list
     for (size_t i = 0; i < mExcludedDevices.size(); i++) {
         const String8& item = mExcludedDevices.itemAt(i);
         if (identifier.name == item) {
             ALOGI("ignoring event id %s driver %s\n", devicePath, item.string());
             close(fd);
             return -1;
         }
     }
     // Get device driver version.
     int driverVersion;
     if(ioctl(fd, EVIOCGVERSION, &driverVersion)) {
         ALOGE("could not get driver version for %s, %s\n", devicePath, strerror(errno));
         close(fd);
         return -1;
     }
     // Get device identifier.
     struct input_id inputId;
     if(ioctl(fd, EVIOCGID, &inputId)) {
         ALOGE("could not get device input id for %s, %s\n", devicePath, strerror(errno));
         close(fd);
         return -1;
     }
     identifier.bus = inputId.bustype;
     identifier.product = inputId.product;
     identifier.vendor = inputId.vendor;
     identifier.version = inputId.version;
     // Get device physical location.
     if(ioctl(fd, EVIOCGPHYS(sizeof(buffer) - 1), &buffer) < 1) {
         //fprintf(stderr, "could not get location for %s, %s\n", devicePath, strerror(errno));
     } else {
         buffer[sizeof(buffer) - 1] = '\0';
         identifier.location.setTo(buffer);
     }
     // Get device unique id.
     if(ioctl(fd, EVIOCGUNIQ(sizeof(buffer) - 1), &buffer) < 1) {
         //fprintf(stderr, "could not get idstring for %s, %s\n", devicePath, strerror(errno));
     } else {
         buffer[sizeof(buffer) - 1] = '\0';
         identifier.uniqueId.setTo(buffer);
     }
     // Fill in the descriptor.
     setDescriptor(identifier);
     // Make file descriptor non-blocking for use with poll().
     if (fcntl(fd, F_SETFL, O_NONBLOCK)) {
         ALOGE("Error %d making device file descriptor non-blocking.", errno);
         close(fd);
         return -1;
     }
     // Allocate device.  (The device object takes ownership of the fd at this point.)
     int32_t deviceId = mNextDeviceId++;
     Device* device = new Device(fd, deviceId, String8(devicePath), identifier);
     ALOGV("add device %d: %s\n", deviceId, devicePath);
     ALOGV("  bus:        %04x\n"
          "  vendor      %04x\n"
          "  product     %04x\n"
          "  version     %04x\n",
         identifier.bus, identifier.vendor, identifier.product, identifier.version);
     ALOGV("  name:       \"%s\"\n", identifier.name.string());
     ALOGV("  location:   \"%s\"\n", identifier.location.string());
     ALOGV("  unique id:  \"%s\"\n", identifier.uniqueId.string());
     ALOGV("  descriptor: \"%s\"\n", identifier.descriptor.string());
     ALOGV("  driver:     v%d.%d.%d\n",
         driverVersion >> 16, (driverVersion >> 8) & 0xff, driverVersion & 0xff);
     // Load the configuration file for the device.
     loadConfigurationLocked(device);
     // Figure out the kinds of events the device reports.
     ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(device->keyBitmask)), device->keyBitmask);
     ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(device->absBitmask)), device->absBitmask);
     ioctl(fd, EVIOCGBIT(EV_REL, sizeof(device->relBitmask)), device->relBitmask);
     ioctl(fd, EVIOCGBIT(EV_SW, sizeof(device->swBitmask)), device->swBitmask);
     ioctl(fd, EVIOCGBIT(EV_LED, sizeof(device->ledBitmask)), device->ledBitmask);
     ioctl(fd, EVIOCGBIT(EV_FF, sizeof(device->ffBitmask)), device->ffBitmask);
     ioctl(fd, EVIOCGPROP(sizeof(device->propBitmask)), device->propBitmask);
     // See if this is a keyboard.  Ignore everything in the button range except for
     // joystick and gamepad buttons which are handled like keyboards for the most part.
     bool haveKeyboardKeys = containsNonZeroByte(device->keyBitmask, 0, sizeof_bit_array(BTN_MISC))
             || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(KEY_OK),
                     sizeof_bit_array(KEY_MAX + 1));
     bool haveGamepadButtons = containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_MISC),
                     sizeof_bit_array(BTN_MOUSE))
             || containsNonZeroByte(device->keyBitmask, sizeof_bit_array(BTN_JOYSTICK),
                     sizeof_bit_array(BTN_DIGI));
     if (haveKeyboardKeys || haveGamepadButtons) {
         device->classes |= INPUT_DEVICE_CLASS_KEYBOARD;
     }
     // See if this is a cursor device such as a trackball or mouse.
     if (test_bit(BTN_MOUSE, device->keyBitmask)
             && test_bit(REL_X, device->relBitmask)
             && test_bit(REL_Y, device->relBitmask)) {
         device->classes |= INPUT_DEVICE_CLASS_CURSOR;
     }
     // See if this is a touch pad.
     // Is this a new modern multi-touch driver?
     if (test_bit(ABS_MT_POSITION_X, device->absBitmask)
             && test_bit(ABS_MT_POSITION_Y, device->absBitmask)) {
         // Some joysticks such as the PS3 controller report axes that conflict
         // with the ABS_MT range.  Try to confirm that the device really is
         // a touch screen.
         if (test_bit(BTN_TOUCH, device->keyBitmask) || !haveGamepadButtons) {
             device->classes |= INPUT_DEVICE_CLASS_TOUCH | INPUT_DEVICE_CLASS_TOUCH_MT;
         }
     // Is this an old style single-touch driver?
     } else if (test_bit(BTN_TOUCH, device->keyBitmask)
             && test_bit(ABS_X, device->absBitmask)
             && test_bit(ABS_Y, device->absBitmask)) {
         device->classes |= INPUT_DEVICE_CLASS_TOUCH;
     }
     // See if this device is a joystick.
     // Assumes that joysticks always have gamepad buttons in order to distinguish them
     // from other devices such as accelerometers that also have absolute axes.
     if (haveGamepadButtons) {
         uint32_t assumedClasses = device->classes | INPUT_DEVICE_CLASS_JOYSTICK;
         for (int i = 0; i <= ABS_MAX; i++) {
             if (test_bit(i, device->absBitmask)
                     && (getAbsAxisUsage(i, assumedClasses) & INPUT_DEVICE_CLASS_JOYSTICK)) {
                 device->classes = assumedClasses;
                 break;
             }
         }
     }
     // Check whether this device has switches.
     for (int i = 0; i <= SW_MAX; i++) {
         if (test_bit(i, device->swBitmask)) {
             device->classes |= INPUT_DEVICE_CLASS_SWITCH;
             break;
         }
     }
     // Check whether this device supports the vibrator.
     if (test_bit(FF_RUMBLE, device->ffBitmask)) {
         device->classes |= INPUT_DEVICE_CLASS_VIBRATOR;
     }
     // Configure virtual keys.
     if ((device->classes & INPUT_DEVICE_CLASS_TOUCH)) {
         // Load the virtual keys for the touch screen, if any.
         // We do this now so that we can make sure to load the keymap if necessary.
         status_t status = loadVirtualKeyMapLocked(device);
         if (!status) {
             device->classes |= INPUT_DEVICE_CLASS_KEYBOARD;
         }
     }
     // Load the key map.
     // We need to do this for joysticks too because the key layout may specify axes.
     status_t keyMapStatus = NAME_NOT_FOUND;
     if (device->classes & (INPUT_DEVICE_CLASS_KEYBOARD | INPUT_DEVICE_CLASS_JOYSTICK)) {
         // Load the keymap for the device.
         keyMapStatus = loadKeyMapLocked(device);
     }
     // Configure the keyboard, gamepad or virtual keyboard.
     if (device->classes & INPUT_DEVICE_CLASS_KEYBOARD) {
         // Register the keyboard as a built-in keyboard if it is eligible.
         if (!keyMapStatus
                 && mBuiltInKeyboardId == NO_BUILT_IN_KEYBOARD
                 && isEligibleBuiltInKeyboard(device->identifier,
                         device->configuration, &device->keyMap)) {
             mBuiltInKeyboardId = device->id;
         }
         // 'Q' key support = cheap test of whether this is an alpha-capable kbd
         if (hasKeycodeLocked(device, AKEYCODE_Q)) {
             device->classes |= INPUT_DEVICE_CLASS_ALPHAKEY;
         }
         // See if this device has a DPAD.
         if (hasKeycodeLocked(device, AKEYCODE_DPAD_UP) &&
                 hasKeycodeLocked(device, AKEYCODE_DPAD_DOWN) &&
                 hasKeycodeLocked(device, AKEYCODE_DPAD_LEFT) &&
                 hasKeycodeLocked(device, AKEYCODE_DPAD_RIGHT) &&
                 hasKeycodeLocked(device, AKEYCODE_DPAD_CENTER)) {
             device->classes |= INPUT_DEVICE_CLASS_DPAD;
         }
         // See if this device has a gamepad.
         for (size_t i = 0; i < sizeof(GAMEPAD_KEYCODES)/sizeof(GAMEPAD_KEYCODES[0]); i++) {
             if (hasKeycodeLocked(device, GAMEPAD_KEYCODES[i])) {
                 device->classes |= INPUT_DEVICE_CLASS_GAMEPAD;
                 break;
             }
         }
         // Disable kernel key repeat since we handle it ourselves
         unsigned int repeatRate[] = {0,0};
         if (ioctl(fd, EVIOCSREP, repeatRate)) {
             ALOGW("Unable to disable kernel key repeat for %s: %s", devicePath, strerror(errno));
         }
     }
     // If the device isn't recognized as something we handle, don't monitor it.
     if (device->classes == 0) {
         ALOGV("Dropping device: id=%d, path='%s', name='%s'",
                 deviceId, devicePath, device->identifier.name.string());
         delete device;
         return -1;
     }
     // Determine whether the device is external or internal.
     if (isExternalDeviceLocked(device)) {
         device->classes |= INPUT_DEVICE_CLASS_EXTERNAL;
     }
     // Register with epoll.
     struct epoll_event eventItem;
     memset(&eventItem, 0, sizeof(eventItem));
     eventItem.events = EPOLLIN;
     eventItem.data.u32 = deviceId;
     if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, fd, &eventItem)) {
         ALOGE("Could not add device fd to epoll instance.  errno=%d", errno);
         delete device;
         return -1;
     }
     // Enable wake-lock behavior on kernels that support it.
     // TODO: Only need this for devices that can really wake the system.
     bool usingSuspendBlockIoctl = !ioctl(fd, EVIOCSSUSPENDBLOCK, 1);
     // Tell the kernel that we want to use the monotonic clock for reporting timestamps
     // associated with input events.  This is important because the input system
     // uses the timestamps extensively and assumes they were recorded using the monotonic
     // clock.
     //
     // In older kernel, before Linux 3.4, there was no way to tell the kernel which
     // clock to use to input event timestamps.  The standard kernel behavior was to
     // record a real time timestamp, which isn't what we want.  Android kernels therefore
     // contained a patch to the evdev_event() function in drivers/input/evdev.c to
     // replace the call to do_gettimeofday() with ktime_get_ts() to cause the monotonic
     // clock to be used instead of the real time clock.
     //
     // As of Linux 3.4, there is a new EVIOCSCLOCKID ioctl to set the desired clock.
     // Therefore, we no longer require the Android-specific kernel patch described above
     // as long as we make sure to set select the monotonic clock.  We do that here.
     int clockId = CLOCK_MONOTONIC;
     bool usingClockIoctl = !ioctl(fd, EVIOCSCLOCKID, &clockId);
     ALOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, "
             "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s, "
             "usingSuspendBlockIoctl=%s, usingClockIoctl=%s",
          deviceId, fd, devicePath, device->identifier.name.string(),
          device->classes,
          device->configurationFile.string(),
          device->keyMap.keyLayoutFile.string(),
          device->keyMap.keyCharacterMapFile.string(),
          toString(mBuiltInKeyboardId == deviceId),
          toString(usingSuspendBlockIoctl), toString(usingClockIoctl));
     addDeviceLocked(device);
     return 0;
 }
 void EventHub::createVirtualKeyboardLocked() {
     InputDeviceIdentifier identifier;
     identifier.name = "Virtual";
     identifier.uniqueId = "<virtual>";
     setDescriptor(identifier);
     Device* device = new Device(-1, VIRTUAL_KEYBOARD_ID, String8("<virtual>"), identifier);
     device->classes = INPUT_DEVICE_CLASS_KEYBOARD
             | INPUT_DEVICE_CLASS_ALPHAKEY
             | INPUT_DEVICE_CLASS_DPAD
             | INPUT_DEVICE_CLASS_VIRTUAL;
     loadKeyMapLocked(device);
     addDeviceLocked(device);
 }
 void EventHub::addDeviceLocked(Device* device) {
     mDevices.add(device->id, device);
     device->next = mOpeningDevices;
     mOpeningDevices = device;
 }
 void EventHub::loadConfigurationLocked(Device* device) {
     device->configurationFile = getInputDeviceConfigurationFilePathByDeviceIdentifier(
             device->identifier, INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION);
     if (device->configurationFile.isEmpty()) {
         ALOGD("No input device configuration file found for device '%s'.",
                 device->identifier.name.string());
     } else {
         status_t status = PropertyMap::load(device->configurationFile,
                 &device->configuration);
         if (status) {
             ALOGE("Error loading input device configuration file for device '%s'.  "
                     "Using default configuration.",
                     device->identifier.name.string());
         }
     }
 }
 status_t EventHub::loadVirtualKeyMapLocked(Device* device) {
     // The virtual key map is supplied by the kernel as a system board property file.
     String8 path;
     path.append("/sys/board_properties/virtualkeys.");
     path.append(device->identifier.name);
     if (access(path.string(), R_OK)) {
         return NAME_NOT_FOUND;
     }
     return VirtualKeyMap::load(path, &device->virtualKeyMap);
 }
 status_t EventHub::loadKeyMapLocked(Device* device) {
     return device->keyMap.load(device->identifier, device->configuration);
 }
 bool EventHub::isExternalDeviceLocked(Device* device) {
     if (device->configuration) {
         bool value;
         if (device->configuration->tryGetProperty(String8("device.internal"), value)) {
             return !value;
         }
     }
     return device->identifier.bus == BUS_USB || device->identifier.bus == BUS_BLUETOOTH;
 }
 bool EventHub::hasKeycodeLocked(Device* device, int keycode) const {
     if (!device->keyMap.haveKeyLayout() || !device->keyBitmask) {
         return false;
     }
     Vector<int32_t> scanCodes;
     device->keyMap.keyLayoutMap->findScanCodesForKey(keycode, &scanCodes);
     const size_t N = scanCodes.size();
     for (size_t i=0; i<N && i<=KEY_MAX; i++) {
         int32_t sc = scanCodes.itemAt(i);
         if (sc >= 0 && sc <= KEY_MAX && test_bit(sc, device->keyBitmask)) {
             return true;
         }
     }
     return false;
 }
 status_t EventHub::closeDeviceByPathLocked(const char *devicePath) {
     Device* device = getDeviceByPathLocked(devicePath);
     if (device) {
         closeDeviceLocked(device);
         return 0;
     }
     ALOGV("Remove device: %s not found, device may already have been removed.", devicePath);
     return -1;
 }
 void EventHub::closeAllDevicesLocked() {
     while (mDevices.size() > 0) {
         closeDeviceLocked(mDevices.valueAt(mDevices.size() - 1));
     }
 }
 void EventHub::closeDeviceLocked(Device* device) {
     ALOGI("Removed device: path=%s name=%s id=%d fd=%d classes=0x%x\n",
          device->path.string(), device->identifier.name.string(), device->id,
          device->fd, device->classes);
     if (device->id == mBuiltInKeyboardId) {
         ALOGW("built-in keyboard device %s (id=%d) is closing! the apps will not like this",
                 device->path.string(), mBuiltInKeyboardId);
         mBuiltInKeyboardId = NO_BUILT_IN_KEYBOARD;
     }
     if (!device->isVirtual()) {
         if (epoll_ctl(mEpollFd, EPOLL_CTL_DEL, device->fd, NULL)) {
             ALOGW("Could not remove device fd from epoll instance.  errno=%d", errno);
         }
     }
     mDevices.removeItem(device->id);
     device->close();
     // Unlink for opening devices list if it is present.
     Device* pred = NULL;
     bool found = false;
     for (Device* entry = mOpeningDevices; entry != NULL; ) {
         if (entry == device) {
             found = true;
             break;
         }
         pred = entry;
         entry = entry->next;
     }
     if (found) {
         // Unlink the device from the opening devices list then delete it.
         // We don't need to tell the client that the device was closed because
         // it does not even know it was opened in the first place.
         ALOGI("Device %s was immediately closed after opening.", device->path.string());
         if (pred) {
             pred->next = device->next;
         } else {
             mOpeningDevices = device->next;
         }
         delete device;
     } else {
         // Link into closing devices list.
         // The device will be deleted later after we have informed the client.
         device->next = mClosingDevices;
         mClosingDevices = device;
     }
 }
 status_t EventHub::readNotifyLocked() {
     int res;
     char devname[PATH_MAX];
     char *filename;
     char event_buf[512];
     int event_size;
     int event_pos = 0;
     struct inotify_event *event;
     ALOGV("EventHub::readNotify nfd: %d\n", mINotifyFd);
     res = read(mINotifyFd, event_buf, sizeof(event_buf));
     if(res < (int)sizeof(*event)) {
         if(errno == EINTR)
             return 0;
         ALOGW("could not get event, %s\n", strerror(errno));
         return -1;
     }
     //printf("got %d bytes of event information\n", res);
     strcpy(devname, DEVICE_PATH);
     filename = devname + strlen(devname);
     *filename++ = '/';
     while(res >= (int)sizeof(*event)) {
         event = (struct inotify_event *)(event_buf + event_pos);
         //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : "");
         if(event->len) {
             strcpy(filename, event->name);
             if(event->mask & IN_CREATE) {
                 openDeviceLocked(devname);
             } else {
                 ALOGI("Removing device '%s' due to inotify event\n", devname);
                 closeDeviceByPathLocked(devname);
             }
         }
         event_size = sizeof(*event) + event->len;
         res -= event_size;
         event_pos += event_size;
     }
     return 0;
 }
 status_t EventHub::scanDirLocked(const char *dirname)
 {
     char devname[PATH_MAX];
     char *filename;
     DIR *dir;
     struct dirent *de;
     dir = opendir(dirname);
     if(dir == NULL)
         return -1;
     strcpy(devname, dirname);
     filename = devname + strlen(devname);
     *filename++ = '/';
     while((de = readdir(dir))) {
         if(de->d_name[0] == '.' &&
            (de->d_name[1] == '\0' ||
             (de->d_name[1] == '.' && de->d_name[2] == '\0')))
             continue;
         strcpy(filename, de->d_name);
         openDeviceLocked(devname);
     }
     closedir(dir);
     return 0;
 }
 void EventHub::requestReopenDevices() {
     ALOGV("requestReopenDevices() called");
     AutoMutex _l(mLock);
     mNeedToReopenDevices = true;
 }
 void EventHub::dump(String8& dump) {
     dump.append("Event Hub State:\n");
     { // acquire lock
         AutoMutex _l(mLock);
         dump.appendFormat(INDENT "BuiltInKeyboardId: %d\n", mBuiltInKeyboardId);
         dump.append(INDENT "Devices:\n");
         for (size_t i = 0; i < mDevices.size(); i++) {
             const Device* device = mDevices.valueAt(i);
             if (mBuiltInKeyboardId == device->id) {
                 dump.appendFormat(INDENT2 "%d: %s (aka device 0 - built-in keyboard)\n",
                         device->id, device->identifier.name.string());
             } else {
                 dump.appendFormat(INDENT2 "%d: %s\n", device->id,
                         device->identifier.name.string());
             }
             dump.appendFormat(INDENT3 "Classes: 0x%08x\n", device->classes);
             dump.appendFormat(INDENT3 "Path: %s\n", device->path.string());
             dump.appendFormat(INDENT3 "Descriptor: %s\n", device->identifier.descriptor.string());
             dump.appendFormat(INDENT3 "Location: %s\n", device->identifier.location.string());
             dump.appendFormat(INDENT3 "UniqueId: %s\n", device->identifier.uniqueId.string());
             dump.appendFormat(INDENT3 "Identifier: bus=0x%04x, vendor=0x%04x, "
                     "product=0x%04x, version=0x%04x\n",
                     device->identifier.bus, device->identifier.vendor,
                     device->identifier.product, device->identifier.version);
             dump.appendFormat(INDENT3 "KeyLayoutFile: %s\n",
                     device->keyMap.keyLayoutFile.string());
             dump.appendFormat(INDENT3 "KeyCharacterMapFile: %s\n",
                     device->keyMap.keyCharacterMapFile.string());
             dump.appendFormat(INDENT3 "ConfigurationFile: %s\n",
                     device->configurationFile.string());
             dump.appendFormat(INDENT3 "HaveKeyboardLayoutOverlay: %s\n",
                     toString(device->overlayKeyMap != NULL));
         }
     } // release lock
 }
 void EventHub::monitor() {
     // Acquire and release the lock to ensure that the event hub has not deadlocked.
     mLock.lock();
     mLock.unlock();
 }
 }; // namespace android

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widget/gonk/libui/EventHub.cpp@fc2d59ddac77 (annotated)

widget/gonk/libui/EventHub.cpp