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136 lines
3.9 KiB
136 lines
3.9 KiB
/*
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* Copyright (C) 2015 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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#define LOG_TAG "EvdevModule"
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//#define LOG_NDEBUG 0
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#include <memory>
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#include <string>
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#include <thread>
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#include <assert.h>
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#include <hardware/hardware.h>
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#include <hardware/input.h>
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#include <utils/Log.h>
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#include "InputHub.h"
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#include "InputDeviceManager.h"
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#include "InputHost.h"
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namespace android {
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static const char kDevInput[] = "/dev/input";
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class EvdevModule {
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public:
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// Takes ownership of the InputHostInterface
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explicit EvdevModule(InputHostInterface* inputHost);
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void init();
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void notifyReport(input_report_t* r);
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private:
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void loop();
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std::unique_ptr<InputHostInterface> mInputHost;
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std::shared_ptr<InputDeviceManager> mDeviceManager;
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std::unique_ptr<InputHub> mInputHub;
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std::thread mPollThread;
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};
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static std::unique_ptr<EvdevModule> gEvdevModule;
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EvdevModule::EvdevModule(InputHostInterface* inputHost) :
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mInputHost(inputHost),
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mDeviceManager(std::make_shared<InputDeviceManager>(mInputHost.get())),
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mInputHub(std::make_unique<InputHub>(mDeviceManager)) {}
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void EvdevModule::init() {
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ALOGV("%s", __func__);
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mInputHub->registerDevicePath(kDevInput);
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mPollThread = std::thread(&EvdevModule::loop, this);
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}
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void EvdevModule::notifyReport(input_report_t* r) {
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ALOGV("%s", __func__);
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// notifyReport() will be called from an arbitrary thread within the input
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// host. Since InputHub is not threadsafe, this is how I expect this to
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// work:
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// * notifyReport() will queue up the output report in the EvdevModule and
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// call wake() on the InputHub.
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// * In the main loop thread, after returning from poll(), the queue will
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// be processed with any pending work.
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}
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void EvdevModule::loop() {
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ALOGV("%s", __func__);
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for (;;) {
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mInputHub->poll();
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// TODO: process any pending work, like notify reports
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}
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}
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extern "C" {
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static int dummy_open(const hw_module_t __unused *module, const char __unused *id,
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hw_device_t __unused **device) {
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ALOGW("open not implemented in the input HAL!");
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return 0;
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}
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static void input_init(const input_module_t* module,
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input_host_t* host, input_host_callbacks_t cb) {
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LOG_ALWAYS_FATAL_IF(strcmp(module->common.id, INPUT_HARDWARE_MODULE_ID) != 0);
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auto inputHost = new InputHost(host, cb);
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gEvdevModule = std::make_unique<EvdevModule>(inputHost);
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gEvdevModule->init();
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}
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static void input_notify_report(const input_module_t* module, input_report_t* r) {
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LOG_ALWAYS_FATAL_IF(strcmp(module->common.id, INPUT_HARDWARE_MODULE_ID) != 0);
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LOG_ALWAYS_FATAL_IF(gEvdevModule == nullptr);
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gEvdevModule->notifyReport(r);
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}
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static struct hw_module_methods_t input_module_methods = {
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.open = dummy_open,
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};
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input_module_t HAL_MODULE_INFO_SYM = {
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.common = {
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.tag = HARDWARE_MODULE_TAG,
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.module_api_version = INPUT_MODULE_API_VERSION_1_0,
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.hal_api_version = HARDWARE_HAL_API_VERSION,
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.id = INPUT_HARDWARE_MODULE_ID,
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.name = "Input evdev HAL",
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.author = "The Android Open Source Project",
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.methods = &input_module_methods,
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.dso = NULL,
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.reserved = {0},
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},
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.init = input_init,
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.notify_report = input_notify_report,
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};
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} // extern "C"
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} // namespace input
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