diff options
author | Andrew Dodd <atd7@cornell.edu> | 2012-07-25 22:14:49 -0400 |
---|---|---|
committer | Andrew Dodd <atd7@cornell.edu> | 2012-07-25 22:14:49 -0400 |
commit | d55558e01029b982ce6c887c2344cbd63560c016 (patch) | |
tree | 13b6175d305059e00e412e4d52a260d3a525d5b4 /libsensors/InputEventReader.cpp | |
parent | 90bbd5f195793766307b5c8625aa44d8aafce7a4 (diff) | |
download | device_samsung_i9100-d55558e01029b982ce6c887c2344cbd63560c016.zip device_samsung_i9100-d55558e01029b982ce6c887c2344cbd63560c016.tar.gz device_samsung_i9100-d55558e01029b982ce6c887c2344cbd63560c016.tar.bz2 |
i9100: Move libsensors to device trees
n7000 has different libsensors than I9100/I777
Perhaps we need to figure out a way for i777 to pull from i9100?
Diffstat (limited to 'libsensors/InputEventReader.cpp')
-rw-r--r-- | libsensors/InputEventReader.cpp | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/libsensors/InputEventReader.cpp b/libsensors/InputEventReader.cpp new file mode 100644 index 0000000..1014f29 --- /dev/null +++ b/libsensors/InputEventReader.cpp @@ -0,0 +1,88 @@ +/* + * Copyright (C) 2008 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. + */ + +#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; +} + +ssize_t InputEventCircularReader::fill(int fd) +{ + size_t numEventsRead = 0; + if (mFreeSpace) { + const ssize_t nread = read(fd, mHead, mFreeSpace * sizeof(input_event)); + if (nread<0 || nread % sizeof(input_event)) { + // we got a partial event!! + 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; + } + } + } + + 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; + } +} |