new_delete_resource.h

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#pragma once
 
#include "./memory_resource.h"
 
#include <cstddef>
#include <new>
 
namespace emlabcpp::pmr
{
struct new_delete_resource_impl : memory_resource
{
        // TODO: maybe guarding in try/catch?
 
        void* allocate( std::size_t bytes, std::size_t alignment ) override
        {
                return ::operator new( bytes, std::align_val_t{ alignment } );
        };
 
        bool deallocate( void* p, std::size_t, std::size_t alignment ) override
        {
                ::operator delete( p, std::align_val_t{ alignment } );
                return true;
        };
 
        [[nodiscard]] bool is_equal( memory_resource const& ) const noexcept override
        {
                return true;
        };
 
        [[nodiscard]] bool is_full() const noexcept override
        {
                return false;
        }
};
 
inline memory_resource& new_delete_resource()
{
        static new_delete_resource_impl impl;
        return impl;
}
}  // namespace emlabcpp::pmr