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66 lines
2.1 KiB
66 lines
2.1 KiB
4 months ago
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/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "eventgatherer.h"
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#include "defines.h"
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#include <utils/Log.h>
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using namespace com::android::car::keventreader;
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EventGatherer::EventGatherer(int argc, const char** argv) {
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for (auto i = 1; i < argc; ++i) {
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auto dev = std::make_unique<InputSource>(argv[i]);
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if (dev && *dev) {
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ALOGD("opened input source file %s", argv[i]);
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mFds.push_back({dev->descriptor(), POLLIN, 0});
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mDevices.emplace(dev->descriptor(), std::move(dev));
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} else {
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ALOGW("failed to open input source file %s", argv[i]);
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}
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}
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}
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size_t EventGatherer::size() const {
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return mDevices.size();
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}
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std::vector<com::android::car::keventreader::KeypressEvent> EventGatherer::read() {
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constexpr int FOREVER = -1;
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std::vector<com::android::car::keventreader::KeypressEvent> result;
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int count = poll(&mFds[0], mFds.size(), FOREVER);
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if (count < 0) {
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ALOGE("poll failed: errno = %d", errno);
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return result;
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}
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for (auto& fd : mFds) {
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if (fd.revents != 0) {
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if (fd.revents == POLLIN) {
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if (auto dev = mDevices[fd.fd].get()) {
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while(auto evt = dev->read()) {
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result.push_back(*evt);
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}
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--count; // found one source of events we care abour
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}
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}
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fd.revents = 0;
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if (count == 0) break; // if we read all events, no point in continuing the scan
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}
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}
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return result;
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}
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