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/*
* (C) 2018 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_MEM_POOL_H_
#define BOTAN_MEM_POOL_H_
#include <botan/types.h>
#include <botan/mutex.h>
#include <vector>
#include <deque>
#include <map>
namespace Botan {
class Bucket;
class BOTAN_TEST_API Memory_Pool final
{
public:
/**
* Initialize a memory pool. The memory is not owned by *this,
* it must be freed by the caller.
* @param pages a list of pages to allocate from
* @param page_size the system page size, each page should
* point to exactly this much memory.
*/
Memory_Pool(const std::vector<void*>& pages,
size_t page_size);
~Memory_Pool();
void* allocate(size_t size);
bool deallocate(void* p, size_t size) noexcept;
Memory_Pool(const Memory_Pool&) = delete;
Memory_Pool(Memory_Pool&&) = delete;
Memory_Pool& operator=(const Memory_Pool&) = delete;
Memory_Pool& operator=(Memory_Pool&&) = delete;
private:
const size_t m_page_size = 0;
mutex_type m_mutex;
std::deque<uint8_t*> m_free_pages;
std::map<size_t, std::deque<Bucket>> m_buckets_for;
uintptr_t m_min_page_ptr;
uintptr_t m_max_page_ptr;
};
}
#endif
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