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/*
* Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
*
* 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.
*/
/**
* @file environment.h
* @ingroup COM_AI_RUNTIME
* @brief This file contains utility functions and classes to access environment variables
*/
#ifndef __UTIL_ENVIRONMENT_H__
#define __UTIL_ENVIRONMENT_H__
namespace nnfw
{
namespace misc
{
/**
* @brief Get the environment variable of int type
* @param[in] name Name of the environment variable
* @param[in] defaultValue Default value when the value of environment variable does not exist
* @return The int value of the environment variable
*/
int get_env_int(const char *name, int defaultValue = 0);
/**
* @brief Get the environment variable of bool type
* @param[in] name Name of the environment variable
* @param[in] defaultValue Default value when the value of environment variable does not exist
* @return @c 0 if the value of the environment variable is @c "0", @c 1 in case of other number
*/
bool get_env_bool(const char *name, bool defaultValue = false);
}
}
#include <string>
namespace nnfw
{
namespace misc
{
namespace env
{
/**
* @brief Parent struct of @ref IntAccessor and @ref FloatAccessor
* @tparam T Type of the value of environment variable
*/
template <typename T> struct Accessor
{
/**
* @brief Destroy the Accessor object
*/
virtual ~Accessor() = default;
/**
* @brief Read the value of environment variable
* @param[out] out The value of environment variable
* @return @c true if accessing environment variable is successful,
* @c false if there is exist no such environment variable
*/
virtual bool access(T &out) const = 0;
};
/**
* @brief Class to read int environment variable
*/
class IntAccessor : public Accessor<int>
{
public:
/**
* @brief Construct a new IntAccessor object
* @param[in] tag Name of environment variable
*/
IntAccessor(const std::string &tag);
public:
/**
* @brief Read the value of environment variable
* @param[out] out The value of environment variable
* @return @c true if accessing environment variable is successful,
* @c false if there is exist no such environment variable
*/
bool access(int &out) const override;
private:
std::string _tag;
};
/**
* @brief Class to read float environment variable
*/
class FloatAccessor : public Accessor<float>
{
public:
/**
* @brief Construct a new FloatAccessor object
* @param[in] tag Name of environment variable
*/
FloatAccessor(const std::string &tag);
public:
/**
* @brief Read the value of environment variable
* @param[out] out The value of environment variable
* @return @c true if accessing environment variable is successful,
* @c false if there is exist no such environment variable
*/
bool access(float &out) const override;
private:
std::string _tag;
};
} // namespace env
} // namespace misc
} // namespace nnfw
#endif // __UTIL_ENVIRONMENT_H__
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