device/vibrator: Move vibrator HAL into device folder for l26

Moved L26 portion of vibrator hal from hardware/google/pixel to
device/google.

Bug: 198239103
Test: None
Change-Id: I4dc77f5770929337905878c7ee6acbbfa489bc57
Signed-off-by: Chris Paulo <chrispaulo@google.com>

vibrator/common/HardwareBase.h

@@ -0,0 +1,221 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+#pragma once
+
+#include <list>
+#include <map>
+#include <sstream>
+#include <string>
+
+#include <android-base/unique_fd.h>
+#include <log/log.h>
+#include <sys/epoll.h>
+#include <utils/Trace.h>
+
+#include "utils.h"
+
+namespace aidl {
+namespace android {
+namespace hardware {
+namespace vibrator {
+
+using ::android::base::unique_fd;
+
+class HwApiBase {
+  private:
+    using NamesMap = std::map<const std::ios *, std::string>;
+
+    class RecordInterface {
+      public:
+        virtual std::string toString(const NamesMap &names) = 0;
+        virtual ~RecordInterface() {}
+    };
+    template <typename T>
+    class Record : public RecordInterface {
+      public:
+        Record(const char *func, const T &value, const std::ios *stream)
+            : mFunc(func), mValue(value), mStream(stream) {}
+        std::string toString(const NamesMap &names) override;
+
+      private:
+        const char *mFunc;
+        const T mValue;
+        const std::ios *mStream;
+    };
+    using Records = std::list<std::unique_ptr<RecordInterface>>;
+
+    static constexpr uint32_t RECORDS_SIZE = 32;
+
+  public:
+    HwApiBase();
+    void debug(int fd);
+
+  protected:
+    void saveName(const std::string &name, const std::ios *stream);
+    template <typename T>
+    void open(const std::string &name, T *stream);
+    bool has(const std::ios &stream);
+    template <typename T>
+    bool get(T *value, std::istream *stream);
+    template <typename T>
+    bool set(const T &value, std::ostream *stream);
+    template <typename T>
+    bool poll(const T &value, std::istream *stream, const int32_t timeout = -1);
+    template <typename T>
+    void record(const char *func, const T &value, const std::ios *stream);
+
+  private:
+    std::string mPathPrefix;
+    NamesMap mNames;
+    Records mRecords{RECORDS_SIZE};
+    std::mutex mRecordsMutex;
+    std::mutex mIoMutex;
+};
+
+#define HWAPI_RECORD(args...) HwApiBase::record(__FUNCTION__, ##args)
+
+template <typename T>
+void HwApiBase::open(const std::string &name, T *stream) {
+    saveName(name, stream);
+    utils::openNoCreate(mPathPrefix + name, stream);
+}
+
+template <typename T>
+bool HwApiBase::get(T *value, std::istream *stream) {
+    ATRACE_NAME("HwApi::get");
+    std::scoped_lock ioLock{mIoMutex};
+    bool ret;
+    stream->seekg(0);
+    *stream >> *value;
+    if (!(ret = !!*stream)) {
+        ALOGE("Failed to read %s (%d): %s", mNames[stream].c_str(), errno, strerror(errno));
+    }
+    stream->clear();
+    HWAPI_RECORD(*value, stream);
+    return ret;
+}
+
+template <typename T>
+bool HwApiBase::set(const T &value, std::ostream *stream) {
+    ATRACE_NAME("HwApi::set");
+    using utils::operator<<;
+    std::scoped_lock ioLock{mIoMutex};
+    bool ret;
+    *stream << value << std::endl;
+    if (!(ret = !!*stream)) {
+        ALOGE("Failed to write %s (%d): %s", mNames[stream].c_str(), errno, strerror(errno));
+        stream->clear();
+    }
+    HWAPI_RECORD(value, stream);
+    return ret;
+}
+
+template <typename T>
+bool HwApiBase::poll(const T &value, std::istream *stream, const int32_t timeoutMs) {
+    ATRACE_NAME("HwApi::poll");
+    auto path = mPathPrefix + mNames[stream];
+    unique_fd fileFd{::open(path.c_str(), O_RDONLY)};
+    unique_fd epollFd{epoll_create(1)};
+    epoll_event event = {
+            .events = EPOLLPRI | EPOLLET,
+    };
+    T actual;
+    bool ret;
+    int epollRet;
+
+    if (timeoutMs < -1) {
+        ALOGE("Invalid polling timeout!");
+        return false;
+    }
+
+    if (epoll_ctl(epollFd, EPOLL_CTL_ADD, fileFd, &event)) {
+        ALOGE("Failed to poll %s (%d): %s", mNames[stream].c_str(), errno, strerror(errno));
+        return false;
+    }
+
+    while ((ret = get(&actual, stream)) && (actual != value)) {
+        epollRet = epoll_wait(epollFd, &event, 1, timeoutMs);
+        if (epollRet <= 0) {
+            ALOGE("Polling error or timeout! (%d)", epollRet);
+            return false;
+        }
+    }
+
+    HWAPI_RECORD(value, stream);
+    return ret;
+}
+
+template <typename T>
+void HwApiBase::record(const char *func, const T &value, const std::ios *stream) {
+    std::lock_guard<std::mutex> lock(mRecordsMutex);
+    mRecords.emplace_back(std::make_unique<Record<T>>(func, value, stream));
+    mRecords.pop_front();
+}
+
+template <typename T>
+std::string HwApiBase::Record<T>::toString(const NamesMap &names) {
+    using utils::operator<<;
+    std::stringstream ret;
+
+    ret << mFunc << " '" << names.at(mStream) << "' = '" << mValue << "'";
+
+    return ret.str();
+}
+
+class HwCalBase {
+  public:
+    HwCalBase();
+    void debug(int fd);
+
+  protected:
+    template <typename T>
+    bool getProperty(const char *key, T *value, const T defval);
+    template <typename T>
+    bool getPersist(const char *key, T *value);
+
+  private:
+    std::string mPropertyPrefix;
+    std::map<std::string, std::string> mCalData;
+};
+
+template <typename T>
+bool HwCalBase::getProperty(const char *key, T *outval, const T defval) {
+    ATRACE_NAME("HwCal::getProperty");
+    *outval = utils::getProperty(mPropertyPrefix + key, defval);
+    return true;
+}
+
+template <typename T>
+bool HwCalBase::getPersist(const char *key, T *value) {
+    ATRACE_NAME("HwCal::getPersist");
+    auto it = mCalData.find(key);
+    if (it == mCalData.end()) {
+        ALOGE("Missing %s config!", key);
+        return false;
+    }
+    std::stringstream stream{it->second};
+    utils::unpack(stream, value);
+    if (!stream || !stream.eof()) {
+        ALOGE("Invalid %s config!", key);
+        return false;
+    }
+    return true;
+}
+
+}  // namespace vibrator
+}  // namespace hardware
+}  // namespace android
+}  // namespace aidl