null.h

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/*
 * This file is part of the µOS++ project (https://micro-os-plus.github.io/).
 * Copyright (c) 2016-2025 Liviu Ionescu. All rights reserved.
 *
 * Permission to use, copy, modify, and/or distribute this software
 * for any purpose is hereby granted, under the terms of the MIT license.
 *
 * If a copy of the license was not distributed with this file, it can
 * be obtained from https://opensource.org/licenses/mit.
 */
 
#ifndef CMSIS_PLUS_MEMORY_NULL_H_
#define CMSIS_PLUS_MEMORY_NULL_H_
 
// ----------------------------------------------------------------------------
 
#if defined(__cplusplus)
 
// ----------------------------------------------------------------------------
 
#include <cmsis-plus/rtos/os.h>
 
// ----------------------------------------------------------------------------
 
#pragma GCC diagnostic push
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wc++98-compat"
#endif
 
// ----------------------------------------------------------------------------
 
namespace os
{
  namespace memory
  {
 
#pragma GCC diagnostic push
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wweak-vtables"
#endif
 
    // ========================================================================
 
    class null_memory_resource : public rtos::memory::memory_resource
    {
    public:
      null_memory_resource () = default;
 
      // The rule of five.
      null_memory_resource (const null_memory_resource&) = delete;
      null_memory_resource (null_memory_resource&&) = delete;
      null_memory_resource&
      operator= (const null_memory_resource&)
          = delete;
      null_memory_resource&
      operator= (null_memory_resource&&)
          = delete;
 
      ~null_memory_resource () override = default;
 
    protected:
      virtual void*
      do_allocate (std::size_t bytes, std::size_t alignment) override;
 
      virtual void
      do_deallocate (void* addr, std::size_t bytes,
                     std::size_t alignment) noexcept override;
 
    };
 
#pragma GCC diagnostic pop
 
    // -------------------------------------------------------------------------
  } /* namespace memory */
} /* namespace os */
 
// ===== Inline & template implementations ====================================
 
namespace os
{
  namespace memory
  {
 
    // ========================================================================
 
#pragma GCC diagnostic push
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wunused-parameter"
#elif defined(__GNUC__)
// Needed because 'alignment' is used only in trace calls.
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
 
    inline void*
    null_memory_resource::do_allocate (std::size_t bytes,
                                       std::size_t alignment)
    {
      estd::__throw_bad_alloc ();
    }
 
    inline void
    null_memory_resource::do_deallocate (void* addr, std::size_t bytes,
                                         std::size_t alignment) noexcept
    {
    }
 
#pragma GCC diagnostic pop
 
    // ========================================================================
  } /* namespace memory */
} /* namespace os */
 
#pragma GCC diagnostic pop
 
// ----------------------------------------------------------------------------
 
#endif /* __cplusplus */
 
// ----------------------------------------------------------------------------
 
#endif /* CMSIS_PLUS_MEMORY_NULL_H_ */