diff options
Diffstat (limited to 'libsensors_iio/InputEventReader.cpp')
| -rw-r--r-- | libsensors_iio/InputEventReader.cpp | 209 |
1 files changed, 105 insertions, 104 deletions
diff --git a/libsensors_iio/InputEventReader.cpp b/libsensors_iio/InputEventReader.cpp index d3e0fe6..ca0a61a 100644 --- a/libsensors_iio/InputEventReader.cpp +++ b/libsensors_iio/InputEventReader.cpp @@ -1,104 +1,105 @@ -/* -* Copyright (C) 2012 Invensense, Inc. -* -* 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_NDEBUG 0 - -#include <stdint.h> -#include <errno.h> -#include <unistd.h> -#include <poll.h> - -#include <sys/cdefs.h> -#include <sys/types.h> - -#include <linux/input.h> - -#include <cutils/log.h> - -#include "InputEventReader.h" - -/*****************************************************************************/ - -struct input_event; - -InputEventCircularReader::InputEventCircularReader(size_t numEvents) - : mBuffer(new input_event[numEvents * 2]), - mBufferEnd(mBuffer + numEvents), - mHead(mBuffer), - mCurr(mBuffer), - mFreeSpace(numEvents) -{ -} - -InputEventCircularReader::~InputEventCircularReader() -{ - delete [] mBuffer; -} - -#define INPUT_EVENT_DEBUG (0) -ssize_t InputEventCircularReader::fill(int fd) -{ - size_t numEventsRead = 0; - LOGV_IF(INPUT_EVENT_DEBUG, - "DEBUG:%s enter, fd=%d\n", __PRETTY_FUNCTION__, fd); - if (mFreeSpace) { - const ssize_t nread = read(fd, mHead, mFreeSpace * sizeof(input_event)); - if (nread < 0 || nread % sizeof(input_event)) { - //LOGE("Partial event received nread=%d, required=%d", - // nread, sizeof(input_event)); - //LOGE("FD trying to read is: %d"); - // we got a partial event!! - if (INPUT_EVENT_DEBUG) { - LOGV_IF(nread < 0, "DEBUG:%s exit nread < 0\n", - __PRETTY_FUNCTION__); - LOGV_IF(nread % sizeof(input_event), - "DEBUG:%s exit nread %% sizeof(input_event)\n", - __PRETTY_FUNCTION__); - } - return (nread < 0 ? -errno : -EINVAL); - } - - numEventsRead = nread / sizeof(input_event); - if (numEventsRead) { - mHead += numEventsRead; - mFreeSpace -= numEventsRead; - if (mHead > mBufferEnd) { - size_t s = mHead - mBufferEnd; - memcpy(mBuffer, mBufferEnd, s * sizeof(input_event)); - mHead = mBuffer + s; - } - } - } - - LOGV_IF(INPUT_EVENT_DEBUG, "DEBUG:%s exit\n", __PRETTY_FUNCTION__); - return numEventsRead; -} - -ssize_t InputEventCircularReader::readEvent(input_event const** events) -{ - *events = mCurr; - ssize_t available = (mBufferEnd - mBuffer) - mFreeSpace; - return available ? 1 : 0; -} - -void InputEventCircularReader::next() -{ - mCurr++; - mFreeSpace++; - if (mCurr >= mBufferEnd) { - mCurr = mBuffer; - } -} +/*
+* Copyright (C) 2012 Invensense, Inc.
+*
+* 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_NDEBUG 0
+
+#include <stdint.h>
+#include <errno.h>
+#include <unistd.h>
+#include <poll.h>
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+#include <linux/input.h>
+
+#include <cutils/log.h>
+
+#include "InputEventReader.h"
+#include "local_log_def.h"
+
+/*****************************************************************************/
+
+struct input_event;
+
+InputEventCircularReader::InputEventCircularReader(size_t numEvents)
+ : mBuffer(new input_event[numEvents * 2]),
+ mBufferEnd(mBuffer + numEvents),
+ mHead(mBuffer),
+ mCurr(mBuffer),
+ mFreeSpace(numEvents)
+{
+}
+
+InputEventCircularReader::~InputEventCircularReader()
+{
+ delete [] mBuffer;
+}
+
+#define INPUT_EVENT_DEBUG (0)
+ssize_t InputEventCircularReader::fill(int fd)
+{
+ size_t numEventsRead = 0;
+ LOGV_IF(INPUT_EVENT_DEBUG,
+ "DEBUG:%s enter, fd=%d\n", __PRETTY_FUNCTION__, fd);
+ if (mFreeSpace) {
+ const ssize_t nread = read(fd, mHead, mFreeSpace * sizeof(input_event));
+ if (nread < 0 || nread % sizeof(input_event)) {
+ //LOGE("Partial event received nread=%d, required=%d",
+ // nread, sizeof(input_event));
+ //LOGE("FD trying to read is: %d");
+ // we got a partial event!!
+ if (INPUT_EVENT_DEBUG) {
+ LOGV_IF(nread < 0, "DEBUG:%s exit nread < 0\n",
+ __PRETTY_FUNCTION__);
+ LOGV_IF(nread % sizeof(input_event),
+ "DEBUG:%s exit nread %% sizeof(input_event)\n",
+ __PRETTY_FUNCTION__);
+ }
+ return (nread < 0 ? -errno : -EINVAL);
+ }
+
+ numEventsRead = nread / sizeof(input_event);
+ if (numEventsRead) {
+ mHead += numEventsRead;
+ mFreeSpace -= numEventsRead;
+ if (mHead > mBufferEnd) {
+ size_t s = mHead - mBufferEnd;
+ memcpy(mBuffer, mBufferEnd, s * sizeof(input_event));
+ mHead = mBuffer + s;
+ }
+ }
+ }
+
+ LOGV_IF(INPUT_EVENT_DEBUG, "DEBUG:%s exit\n", __PRETTY_FUNCTION__);
+ return numEventsRead;
+}
+
+ssize_t InputEventCircularReader::readEvent(input_event const** events)
+{
+ *events = mCurr;
+ ssize_t available = (mBufferEnd - mBuffer) - mFreeSpace;
+ return available ? 1 : 0;
+}
+
+void InputEventCircularReader::next()
+{
+ mCurr++;
+ mFreeSpace++;
+ if (mCurr >= mBufferEnd) {
+ mCurr = mBuffer;
+ }
+}
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