92 lines
2.7 KiB
C++
92 lines
2.7 KiB
C++
/*
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* Copyright (C) 2022 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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#ifndef ANDROID_HARDWARE_CONTEXTHUB_COMMON_CHRE_CONNECTION_H_
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#define ANDROID_HARDWARE_CONTEXTHUB_COMMON_CHRE_CONNECTION_H_
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#include <flatbuffers/flatbuffers.h>
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#include <chrono>
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#include <cstddef>
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#include <cstdint>
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#include <future>
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#include <string>
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#include "chre_host/fragmented_load_transaction.h"
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#include "hal_client_id.h"
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namespace android::hardware::contexthub::common::implementation {
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/** This abstract class defines the interface between HAL and CHRE. */
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class ChreConnection {
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public:
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virtual ~ChreConnection() = default;
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/**
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* Initializes the connection between HAL and CHRE.
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*
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* @return true if success, otherwise false.
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*/
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virtual bool init() = 0;
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/**
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* Sends a message to CHRE.
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*
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* @return true if success, otherwise false.
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*/
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virtual bool sendMessage(void *data, size_t length) = 0;
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/**
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* @return The nanoapp loading fragment size in bytes.
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*/
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virtual size_t getLoadFragmentSizeBytes() const {
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static_assert(CHRE_HOST_DEFAULT_FRAGMENT_SIZE > 0);
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return CHRE_HOST_DEFAULT_FRAGMENT_SIZE;
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}
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/**
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* Sends a message encapsulated in a FlatBufferBuilder to CHRE.
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*
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* @return true if success, otherwise false.
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*/
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inline bool sendMessage(const flatbuffers::FlatBufferBuilder &builder) {
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return sendMessage(builder.GetBufferPointer(), builder.GetSize());
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}
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/**
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* Gets the offset between the Context hub and Android time in nanoseconds.
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*
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* This function may be used for synchronizing timestamps between the Context
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* hub and Android.
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*
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* @param offset points to the address storing the offset in nanoseconds which
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* is defined as android time - context hub time.
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* @return true on success, otherwise false.
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*/
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virtual bool getTimeOffset(int64_t * /*offset*/) {
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return false;
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}
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/**
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* Returns true if time sync is required by the platform, false otherwise.
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*
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* When this function returns false, getTimeOffset may not be implemented.
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*/
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virtual bool isTimeSyncNeeded() {
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return false;
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}
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};
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} // namespace android::hardware::contexthub::common::implementation
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#endif // ANDROID_HARDWARE_CONTEXTHUB_COMMON_CHRE_CONNECTION_H_
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