NotifyListener.h

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// Copyright (c) FIRST and other WPILib contributors.
// Open Source Software; you can modify and/or share it under the terms of
// the WPILib BSD license file in the root directory of this project.
 
#pragma once
 
#include "hal/Value.h"
 
typedef void (*HAL_NotifyCallback)(const char* name, void* param,
                                   const struct HAL_Value* value);
 
typedef void (*HAL_BufferCallback)(const char* name, void* param,
                                   unsigned char* buffer, unsigned int count);
 
typedef void (*HAL_ConstBufferCallback)(const char* name, void* param,
                                        const unsigned char* buffer,
                                        unsigned int count);
 
#ifdef __cplusplus
 
namespace hal {
 
template <typename CallbackFunction>
struct HalCallbackListener {
  HalCallbackListener() = default;
  HalCallbackListener(void* param_, CallbackFunction callback_)
      : callback(callback_), param(param_) {}
 
  explicit operator bool() const { return callback != nullptr; }
 
  CallbackFunction callback = nullptr;
  void* param = nullptr;
};
 
}  // namespace hal
 
#endif