Create wrapper for 2.0/2.1 sensor HALs

Creates a wrapper that makes a 2.0 sensor HAL appear to look like a 2.1
sensor HAL so that various pieces of code can be shared between the two
implementations.

Bug: 144139857
Test: Run VTS
Change-Id: I4ee4fd2b900e5d4ca744f420f69e150ba38f7949

1 files changed, 109 insertions, 0 deletions

diff --git a/sensors/common/utils/EventMessageQueueWrapper.h b/sensors/common/utils/EventMessageQueueWrapper.h
new file mode 100644
index 0000000000..bf3261ffbc
--- /dev/null
+++ b/sensors/common/utils/EventMessageQueueWrapper.h
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2020 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_HARDWARE_SENSORS_V2_1_EVENTMESSAGEQUEUEWRAPPER_H
+#define ANDROID_HARDWARE_SENSORS_V2_1_EVENTMESSAGEQUEUEWRAPPER_H
+
+#include "convertV2_1.h"
+
+#include <android/hardware/sensors/2.1/types.h>
+#include <fmq/MessageQueue.h>
+#include <hidl/MQDescriptor.h>
+#include <hidl/Status.h>
+#include <log/log.h>
+
+#include <atomic>
+
+namespace android {
+namespace hardware {
+namespace sensors {
+namespace V2_1 {
+namespace implementation {
+
+class EventMessageQueueWrapperBase : public RefBase {
+  public:
+    virtual ~EventMessageQueueWrapperBase() {}
+
+    virtual std::atomic<uint32_t>* getEventFlagWord() = 0;
+    virtual size_t availableToRead() = 0;
+    virtual bool read(V2_1::Event* events, size_t numToRead) = 0;
+    virtual bool write(const std::vector<V2_1::Event>& events) = 0;
+};
+
+class EventMessageQueueWrapperV1_0 : public EventMessageQueueWrapperBase {
+  public:
+    using EventMessageQueue = MessageQueue<V1_0::Event, kSynchronizedReadWrite>;
+
+    EventMessageQueueWrapperV1_0(std::unique_ptr<EventMessageQueue>& queue)
+        : mQueue(std::move(queue)) {}
+
+    const ::android::hardware::MQDescriptorSync<V1_0::Event>* getDesc() {
+        return mQueue->getDesc();
+    }
+
+    virtual std::atomic<uint32_t>* getEventFlagWord() override {
+        return mQueue->getEventFlagWord();
+    }
+
+    virtual size_t availableToRead() override { return mQueue->availableToRead(); }
+
+    virtual bool read(V2_1::Event* events, size_t numToRead) override {
+        return mQueue->read(reinterpret_cast<V1_0::Event*>(events), numToRead);
+    }
+
+    virtual bool write(const std::vector<V2_1::Event>& events) override {
+        const std::vector<V1_0::Event>& oldEvents = convertToOldEvents(events);
+        return mQueue->write(oldEvents.data(), oldEvents.size());
+    }
+
+  private:
+    std::unique_ptr<EventMessageQueue> mQueue;
+};
+
+class EventMessageQueueWrapperV2_1 : public EventMessageQueueWrapperBase {
+  public:
+    using EventMessageQueue = MessageQueue<V2_1::Event, kSynchronizedReadWrite>;
+
+    EventMessageQueueWrapperV2_1(std::unique_ptr<EventMessageQueue>& queue)
+        : mQueue(std::move(queue)) {}
+
+    const ::android::hardware::MQDescriptorSync<V2_1::Event>* getDesc() {
+        return mQueue->getDesc();
+    }
+
+    std::atomic<uint32_t>* getEventFlagWord() override { return mQueue->getEventFlagWord(); }
+
+    virtual size_t availableToRead() override { return mQueue->availableToRead(); }
+
+    virtual bool read(V2_1::Event* events, size_t numToRead) override {
+        return mQueue->read(events, numToRead);
+    }
+
+    bool write(const std::vector<V2_1::Event>& events) override {
+        return mQueue->write(events.data(), events.size());
+    }
+
+  private:
+    std::unique_ptr<EventMessageQueue> mQueue;
+};
+
+}  // namespace implementation
+}  // namespace V2_1
+}  // namespace sensors
+}  // namespace hardware
+}  // namespace android
+
+#endif  // ANDROID_HARDWARE_SENSORS_V2_1_EVENTMESSAGEQUEUEWRAPPER_H
\ No newline at end of file