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// Copyright 2025-2026, Amlal El Mahrouss (amlal@nekernel.org)
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
// Official repository: https://github.com/ocl-org/core
#ifndef OCL_CORE_ALLOCATOR_OP
#define OCL_CORE_ALLOCATOR_OP
#include <ocl/detail/config.hpp>
#include <memory>
#include <mutex>
#include <thread>
namespace ocl
{
/// @note these are guidelines on allocating a resource
template <typename type>
struct global_new_op final
{
using pointer_type = type*;
using const_pointer_type = const type*;
using pointer = type*;
using const_pointer = const type*;
using mutex_type = std::mutex;
using lock_type = std::scoped_lock<mutex_type>;
mutex_type m_;
auto alloc() -> pointer_type
{
return new type;
}
template <size_t N>
auto array_alloc() -> pointer_type
{
return new type[N];
}
template <typename... var_type>
auto var_alloc(var_type&&... args) -> pointer_type
{
return new type{std::forward<var_type>(args)...};
}
};
template <typename type>
struct global_delete_op final
{
using pointer_type = type*;
using const_pointer_type = const type*;
auto operator()(pointer_type t) -> void
{
delete[] t;
}
};
/// \brief Backwards compat. alias of global_new_op.
template <typename type>
using global_array_delete_op = global_new_op<type>;
/// \brief Allocator operations structure. Takes care of memory mgmt within a pool.
template <typename ret_type, typename allocator_new, typename allocator_delete>
class allocator_op
{
public:
allocator_op() = default;
~allocator_op() = default;
allocator_op& operator=(const allocator_op&) = delete;
allocator_op(const allocator_op&) = delete;
template <typename... var_type>
auto construct_var(var_type&&... args)
{
allocator_new alloc;
typename allocator_new::lock_type lt{alloc.m_};
return std::shared_ptr<ret_type>(alloc.template var_alloc<var_type...>(std::forward<var_type...>(args)...), allocator_delete{});
}
template <std::size_t N>
auto construct_array()
{
allocator_new alloc;
typename allocator_new::lock_type lt{alloc.m_};
return std::shared_ptr<ret_type>(alloc.template array_alloc<N>(), allocator_delete{});
}
};
template <typename type>
using allocator = allocator_op<type, global_new_op<type>, global_delete_op<type>>;
} // namespace ocl
#endif // ifndef OCL_CORE_ALLOCATOR_OP
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