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/*
* Author: Sven Gothel <sgothel@jausoft.com>
* Copyright (c) 2020 Gothel Software e.K.
* Copyright (c) 2020 ZAFENA AB
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef BASIC_ALGOS_HPP_
#define BASIC_ALGOS_HPP_
#include <mutex>
namespace direct_bt {
/**
* Custom for_each template, using indices instead of iterators,
* allowing container to be modified within lambda 'callback'.
* <p>
* Method performs UnaryFunction on all elements [0..n-1],
* where n is being retrieved once before the loop!
* </p>
*/
template<class InputArray, class UnaryFunction>
constexpr UnaryFunction for_each_idx(InputArray &array, UnaryFunction f)
{
const size_t size = array.size();
for (size_t i = 0; i < size; i++) {
f(array[i]);
}
return f; // implicit move since C++11
}
/**
* Custom for_each template, using indices instead of iterators,
* allowing container to be modified within lambda 'callback'.
* <p>
* Method performs UnaryFunction on all elements [0..n-1],
* where n is being retrieved once before the loop!
* </p>
* <p>
* This method also utilizes a given mutex to ensure thread-safety,
* by operating within an RAII-style std::lock_guard block.
* </p>
*/
template<class Mutex, class InputArray, class UnaryFunction>
constexpr UnaryFunction for_each_idx_mtx(Mutex &mtx, InputArray &array, UnaryFunction f)
{
const std::lock_guard<Mutex> lock(mtx); // RAII-style acquire and relinquish via destructor
const size_t size = array.size();
for (size_t i = 0; i < size; i++) {
f(array[i]);
}
return f; // implicit move since C++11
}
} // namespace direct_bt
#endif /* BASIC_ALGOS_HPP_ */
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