upload android base code part1

android/frameworks/native/services/displayservice/Android.bp

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+//
+// Copyright (C) 2017 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.
+//
+
+cc_library_shared {
+    name: "libdisplayservicehidl",
+
+    srcs: [
+        "DisplayService.cpp",
+        "DisplayEventReceiver.cpp",
+    ],
+
+    shared_libs: [
+        "libbase",
+        "liblog",
+        "libgui",
+        "libhidlbase",
+        "libhidltransport",
+        "libutils",
+        "android.frameworks.displayservice@1.0",
+    ],
+
+    export_include_dirs: ["include"],
+    export_shared_lib_headers: [
+        "android.frameworks.displayservice@1.0",
+        "libgui",
+        "libutils",
+    ],
+
+    cflags: [
+        "-Werror",
+        "-Wall",
+    ]
+}

android/frameworks/native/services/displayservice/DisplayEventReceiver.cpp

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+/*
+ * Copyright (C) 2017 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.
+ */
+
+#define LOG_TAG "libdisplayservicehidl"
+
+#include <displayservice/DisplayEventReceiver.h>
+
+#include <android-base/logging.h>
+#include <android/frameworks/displayservice/1.0/BpHwEventCallback.h>
+
+#include <thread>
+
+namespace android {
+namespace frameworks {
+namespace displayservice {
+namespace V1_0 {
+namespace implementation {
+
+sp<Looper> getLooper() {
+    static sp<Looper> looper = []() {
+        sp<Looper> looper = new Looper(false /* allowNonCallbacks */);
+
+        std::thread{[&](){
+            int pollResult = looper->pollAll(-1 /* timeout */);
+            LOG(ERROR) << "Looper::pollAll returns unexpected " << pollResult;
+        }}.detach();
+
+        return looper;
+    }();
+
+    return looper;
+}
+
+DisplayEventReceiver::AttachedEvent::AttachedEvent(const sp<IEventCallback> &callback)
+    : mCallback(callback)
+{
+    mLooperAttached = getLooper()->addFd(mFwkReceiver.getFd(),
+            Looper::POLL_CALLBACK,
+            Looper::EVENT_INPUT,
+            this,
+            nullptr);
+}
+
+DisplayEventReceiver::AttachedEvent::~AttachedEvent() {
+    if (!detach()) {
+        LOG(ERROR) << "Could not remove fd from looper.";
+    }
+}
+
+bool DisplayEventReceiver::AttachedEvent::detach() {
+    if (!valid()) {
+        return true;
+    }
+
+    return getLooper()->removeFd(mFwkReceiver.getFd());
+}
+
+bool DisplayEventReceiver::AttachedEvent::valid() const {
+    return mFwkReceiver.initCheck() == OK && mLooperAttached;
+}
+
+DisplayEventReceiver::FwkReceiver &DisplayEventReceiver::AttachedEvent::receiver() {
+    return mFwkReceiver;
+}
+
+int DisplayEventReceiver::AttachedEvent::handleEvent(int fd, int events, void* /* data */) {
+    CHECK(fd == mFwkReceiver.getFd());
+
+    if (events & (Looper::EVENT_ERROR | Looper::EVENT_HANGUP)) {
+        LOG(ERROR) << "AttachedEvent handleEvent received error or hangup:" << events;
+        return 0; // remove the callback
+    }
+
+    if (!(events & Looper::EVENT_INPUT)) {
+        LOG(ERROR) << "AttachedEvent handleEvent unhandled poll event:" << events;
+        return 1; // keep the callback
+    }
+
+    constexpr size_t SIZE = 1;
+
+    ssize_t n;
+    FwkReceiver::Event buf[SIZE];
+    while ((n = mFwkReceiver.getEvents(buf, SIZE)) > 0) {
+        for (size_t i = 0; i < static_cast<size_t>(n); ++i) {
+            const FwkReceiver::Event &event = buf[i];
+
+            uint32_t type = event.header.type;
+            uint64_t timestamp = event.header.timestamp;
+
+            switch(buf[i].header.type) {
+                case FwkReceiver::DISPLAY_EVENT_VSYNC: {
+                    mCallback->onVsync(timestamp, event.vsync.count);
+                } break;
+                case FwkReceiver::DISPLAY_EVENT_HOTPLUG: {
+                    mCallback->onHotplug(timestamp, event.hotplug.connected);
+                } break;
+                default: {
+                    LOG(ERROR) << "AttachedEvent handleEvent unknown type: " << type;
+                }
+            }
+        }
+    }
+
+    return 1; // keep on going
+}
+
+Return<Status> DisplayEventReceiver::init(const sp<IEventCallback>& callback) {
+    std::unique_lock<std::mutex> lock(mMutex);
+
+    if (mAttached != nullptr || callback == nullptr) {
+        return Status::BAD_VALUE;
+    }
+
+    mAttached = new AttachedEvent(callback);
+
+    return mAttached->valid() ? Status::SUCCESS : Status::UNKNOWN;
+}
+
+Return<Status> DisplayEventReceiver::setVsyncRate(int32_t count) {
+    std::unique_lock<std::mutex> lock(mMutex);
+
+    if (mAttached == nullptr || count < 0) {
+        return Status::BAD_VALUE;
+    }
+
+    bool success = OK == mAttached->receiver().setVsyncRate(count);
+    return success ? Status::SUCCESS : Status::UNKNOWN;
+}
+
+Return<Status> DisplayEventReceiver::requestNextVsync() {
+    std::unique_lock<std::mutex> lock(mMutex);
+
+    if (mAttached == nullptr) {
+        return Status::BAD_VALUE;
+    }
+
+    bool success = OK == mAttached->receiver().requestNextVsync();
+    return success ? Status::SUCCESS : Status::UNKNOWN;
+}
+
+Return<Status> DisplayEventReceiver::close() {
+    std::unique_lock<std::mutex> lock(mMutex);
+    if (mAttached == nullptr) {
+        return Status::BAD_VALUE;
+    }
+
+    bool success = mAttached->detach();
+    mAttached = nullptr;
+
+    return success ? Status::SUCCESS : Status::UNKNOWN;
+}
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace displayservice
+}  // namespace frameworks
+}  // namespace android

android/frameworks/native/services/displayservice/DisplayService.cpp

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+/*
+ * Copyright (C) 2017 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 <displayservice/DisplayService.h>
+#include <displayservice/DisplayEventReceiver.h>
+
+namespace android {
+namespace frameworks {
+namespace displayservice {
+namespace V1_0 {
+namespace implementation {
+
+Return<sp<IDisplayEventReceiver>> DisplayService::getEventReceiver() {
+    return new DisplayEventReceiver();
+}
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace displayservice
+}  // namespace frameworks
+}  // namespace android

android/frameworks/native/services/displayservice/include/displayservice/DisplayEventReceiver.h

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+/*
+ * Copyright (C) 2017 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.
+ */
+
+#ifndef ANDROID_FRAMEWORKS_DISPLAYSERVICE_V1_0_DISPLAYEVENTRECEIVER_H
+#define ANDROID_FRAMEWORKS_DISPLAYSERVICE_V1_0_DISPLAYEVENTRECEIVER_H
+
+#include <android/frameworks/displayservice/1.0/IDisplayEventReceiver.h>
+#include <gui/DisplayEventReceiver.h>
+#include <hidl/Status.h>
+#include <gui/DisplayEventReceiver.h>
+#include <utils/Looper.h>
+
+#include <mutex>
+
+namespace android {
+namespace frameworks {
+namespace displayservice {
+namespace V1_0 {
+namespace implementation {
+
+using ::android::hardware::Return;
+using ::android::hardware::Void;
+
+class DisplayEventReceiver : public IDisplayEventReceiver {
+public:
+    Return<Status> init(const sp<IEventCallback>& callback) override;
+    Return<Status> setVsyncRate(int32_t count) override;
+    Return<Status> requestNextVsync() override;
+    Return<Status> close() override;
+
+private:
+    using FwkReceiver = ::android::DisplayEventReceiver;
+
+    struct AttachedEvent : LooperCallback {
+        AttachedEvent(const sp<IEventCallback> &callback);
+        ~AttachedEvent();
+
+        bool detach();
+        bool valid() const;
+        FwkReceiver &receiver();
+        virtual int handleEvent(int fd, int events, void* /* data */) override;
+
+    private:
+        FwkReceiver mFwkReceiver;
+        sp<IEventCallback> mCallback;
+        bool mLooperAttached;
+    };
+
+    sp<AttachedEvent> mAttached;
+    std::mutex mMutex;
+};
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace displayservice
+}  // namespace frameworks
+}  // namespace android
+
+#endif  // ANDROID_FRAMEWORKS_DISPLAYSERVICE_V1_0_DISPLAYEVENTRECEIVER_H

android/frameworks/native/services/displayservice/include/displayservice/DisplayService.h

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+/*
+ * Copyright (C) 2017 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.
+ */
+
+#ifndef ANDROID_FRAMEWORKS_DISPLAYSERVICE_V1_0_DISPLAYSERVICE_H
+#define ANDROID_FRAMEWORKS_DISPLAYSERVICE_V1_0_DISPLAYSERVICE_H
+
+#include <android/frameworks/displayservice/1.0/IDisplayService.h>
+#include <hidl/Status.h>
+
+namespace android {
+namespace frameworks {
+namespace displayservice {
+namespace V1_0 {
+namespace implementation {
+
+using ::android::hardware::Return;
+using ::android::hardware::Void;
+
+struct DisplayService : public IDisplayService {
+    Return<sp<IDisplayEventReceiver>> getEventReceiver() override;
+};
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace displayservice
+}  // namespace frameworks
+}  // namespace android
+
+#endif  // ANDROID_FRAMEWORKS_DISPLAYSERVICE_V1_0_DISPLAYSERVICE_H