locking_allocator.h

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/*

* Mlock Allocator

* (C) 2012 Jack Lloyd

* Botan is released under the Simplified BSD License (see license.txt)

*/

#ifndef BOTAN_MLOCK_ALLOCATOR_H_

#define BOTAN_MLOCK_ALLOCATOR_H_

#include <botan/types.h>

#include <vector>

#include <memory>

BOTAN_FUTURE_INTERNAL_HEADER(locking_allocator.h)

namespace Botan {

class Memory_Pool;

class BOTAN_PUBLIC_API(2,0) mlock_allocator final

   public:

      static mlock_allocator& instance();

      void* allocate(size_t num_elems, size_t elem_size);

      bool deallocate(void* p, size_t num_elems, size_t elem_size) noexcept;

      mlock_allocator(const mlock_allocator&) = delete;

      mlock_allocator& operator=(const mlock_allocator&) = delete;

   private:

      mlock_allocator();

      ~mlock_allocator();

      std::unique_ptr<Memory_Pool> m_pool;

      std::vector<void*> m_locked_pages;

};

#endif