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author | Andrew Dodd <atd7@cornell.edu> | 2012-07-09 21:32:33 -0400 |
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committer | Andrew Dodd <atd7@cornell.edu> | 2012-07-16 09:06:35 -0400 |
commit | f4451d8eab13d42503ad3aeb3f798caa8a69d01a (patch) | |
tree | c4d51345f0698502fe5dc415637705cdcd2076da /libsensors/InputEventReader.cpp | |
parent | eacbfb6f87fb728e1d7647512042161525bf8819 (diff) | |
download | device_samsung_n7000-f4451d8eab13d42503ad3aeb3f798caa8a69d01a.zip device_samsung_n7000-f4451d8eab13d42503ad3aeb3f798caa8a69d01a.tar.gz device_samsung_n7000-f4451d8eab13d42503ad3aeb3f798caa8a69d01a.tar.bz2 |
n7000: use opensource sensor hal
Now that the orientation sensor seems to work, let's use the HAL
that sucks less.
Change-Id: I72408d4fc96f86796e31f4c006787dc2a64606ee
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; + } +} |