83 lines
1.7 KiB
C++
83 lines
1.7 KiB
C++
/*
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* \brief Linux kernel memory allocator
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* \author Sebastian Sumpf
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* \author Josef Soentgen
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* \author Norman Feske
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* \date 2014-10-10
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*/
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/*
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* Copyright (C) 2014-2017 Genode Labs GmbH
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*
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* This file is distributed under the terms of the GNU General Public License
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* version 2.
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*/
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#ifndef _LX_KIT__MALLOC_H_
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#define _LX_KIT__MALLOC_H_
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/* Linux emulation environment includes */
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#include <lx_kit/types.h>
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#include <lx_kit/internal/slab_alloc.h>
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#include <lx_kit/internal/slab_backend_alloc.h>
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namespace Lx {
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class Malloc;
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void malloc_init(Genode::Env &env, Genode::Allocator &md_alloc);
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}
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class Lx::Malloc : public Genode::Allocator
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{
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public:
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typedef Genode::size_t size_t;
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enum { MAX_SIZE_LOG2 = 16 /* 64 KiB */ };
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/**
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* Alloc in slabs
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*/
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virtual void *alloc(Genode::size_t size, int align = 0, Genode::addr_t *phys = 0) = 0;
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virtual void free(void const *a) = 0;
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virtual void *alloc_large(size_t size) = 0;
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virtual void free_large(void *ptr) = 0;
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virtual size_t size(void const *a) = 0;
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virtual Genode::addr_t phys_addr(void *a) = 0;
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virtual Genode::addr_t virt_addr(Genode::addr_t phys) = 0;
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/**
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* Belongs given address to this allocator
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*/
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virtual bool inside(addr_t const addr) const = 0;
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/**
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* Genode alllocator interface
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*/
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bool need_size_for_free() const override { return false; }
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size_t overhead(size_t size) const override { return 0; }
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bool alloc(size_t size, void **out_addr) override
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{
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*out_addr = alloc(size);
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return *out_addr ? true : false;
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}
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void free(void *addr, size_t size) override { free(addr); }
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static Malloc &mem();
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static Malloc &dma();
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};
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#endif /* _LX_KIT__MALLOC_H_ */
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