event_buffer.h

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/*
 * Copyright (C) 2023 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 <cstdint>
#include <cstdlib>
#include <vector>
 
#include "cuttlefish/common/libs/utils/cf_endian.h"
 
namespace cuttlefish {
 
class EventBuffer {
 public:
  EventBuffer(size_t num_events);
 
  void AddEvent(uint16_t type, uint16_t code, int32_t value);
 
  size_t size() const { return buffer_.size() * sizeof(virtio_input_event); }
 
  const void* data() const { return buffer_.data(); }
 
 private:
  struct virtio_input_event {
    Le16 type;
    Le16 code;
    Le32 value;
  };
 
  std::vector<virtio_input_event> buffer_;
};
 
}  // namespace cuttlefish