malloc.h

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/*
 * This file is part of the µOS++ distribution.
 *   (https://github.com/micro-os-plus)
 * Copyright (c) 2016 Liviu Ionescu.
 *
 * 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 CMSIS_PLUS_MEMORY_MALLOC_H_
#define CMSIS_PLUS_MEMORY_MALLOC_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 malloc_memory_resource : public rtos::memory::memory_resource
    {
    public:
 
      malloc_memory_resource ();
 
      malloc_memory_resource (const char* name);
 
      malloc_memory_resource (const malloc_memory_resource&) = delete;
      malloc_memory_resource (malloc_memory_resource&&) = delete;
      malloc_memory_resource&
      operator= (const malloc_memory_resource&) = delete;
      malloc_memory_resource&
      operator= (malloc_memory_resource&&) = delete;
 
      ~malloc_memory_resource () override;
 
    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;
 
    };
 
    // ======================================================================
 
    class new_delete_memory_resource : public rtos::memory::memory_resource
    {
    public:
 
      ~new_delete_memory_resource () override = default;
 
    protected:
 
      virtual void*
      do_allocate (size_t bytes, size_t alignment) override;
 
      virtual void
      do_deallocate (void* addr, size_t bytes, size_t alignment)
          noexcept override;
 
    };
 
#pragma GCC diagnostic pop
 
  // -------------------------------------------------------------------------
  } /* namespace memory */
} /* namespace os */
 
// ===== Inline & template implementations ====================================
 
namespace os
{
  namespace memory
  {
 
    // ========================================================================
 
    inline
    malloc_memory_resource::malloc_memory_resource ()
    {
      trace::printf ("%s() @%p %s\n", __func__, this, this->name ());
    }
 
    inline
    malloc_memory_resource::malloc_memory_resource (const char* name) :
        rtos::memory::memory_resource
          { name }
    {
      trace::printf ("%s() @%p %s\n", __func__, this, this->name ());
    }
 
    inline
    malloc_memory_resource::~malloc_memory_resource ()
    {
      trace::printf ("%s() @%p %s\n", __func__, this, this->name ());
    }
 
#pragma GCC diagnostic push
// Needed because 'alignment' is used only in trace calls.
#pragma GCC diagnostic ignored "-Wunused-parameter"
 
    inline void*
    malloc_memory_resource::do_allocate (std::size_t bytes,
                                         std::size_t alignment)
    {
      // Ignore alignment for now.
      void* mem = std::malloc (bytes);
#if defined(OS_TRACE_LIBCPP_MEMORY_RESOURCE)
      trace::printf ("%s(%u,%u)=%p @%p %s\n", __func__, bytes, alignment, mem,
                     this, name ());
#endif
 
      return mem;
    }
 
    inline void
    malloc_memory_resource::do_deallocate (void* addr, std::size_t bytes,
                                           std::size_t alignment) noexcept
    {
#if defined(OS_TRACE_LIBCPP_MEMORY_RESOURCE)
      trace::printf ("%s(%p,%u,%u) @%p %s\n", __func__, addr, bytes, alignment,
                     this, name ());
#endif
      // Ignore size and alignment for now.
      std::free (addr);
    }
 
#pragma GCC diagnostic pop
 
    // ========================================================================
 
#pragma GCC diagnostic push
// Needed because 'alignment' is used only in trace calls.
#pragma GCC diagnostic ignored "-Wunused-parameter"
 
    inline void*
    new_delete_memory_resource::do_allocate (size_t bytes, size_t alignment)
    {
      // Ignore alignment for now.
      void* mem = ::operator new (bytes);
#if defined(OS_TRACE_LIBCPP_MEMORY_RESOURCE)
      trace::printf ("%s(%u,%u)=%p @%p %s\n", __func__, bytes, alignment, mem,
                     this, name ());
#endif
      allocated_chunks_++;
      return mem;
    }
 
    inline void
    new_delete_memory_resource::do_deallocate (void* addr, size_t bytes,
                                               size_t alignment) noexcept
    {
#if defined(OS_TRACE_LIBCPP_MEMORY_RESOURCE)
      trace::printf ("%s(%p,%u,%u) @%p %s\n", __func__, addr, bytes, alignment,
                     this, name ());
#endif
      // Ignore size and alignment for now.
      ::operator delete (addr);
      allocated_chunks_--;
    }
 
#pragma GCC diagnostic pop
 
  // ==========================================================================
  } /* namespace memory */
} /* namespace os */
 
#pragma GCC diagnostic pop
 
// ----------------------------------------------------------------------------
 
#endif /* __cplusplus */
 
// ----------------------------------------------------------------------------
 
#endif /* CMSIS_PLUS_MEMORY_MALLOC_H_ */