6d27ee5dc5
This will be helpful as we work to improve it. Without deallocations, we currently stand at the following alloc numbers 8 - 142 16 - 319 32 - 364 unsized - 305 total page usage including slabs is 12.
50 lines
1 KiB
C++
50 lines
1 KiB
C++
#pragma once
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#include <glacier/container/intrusive_list.h>
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#include <glacier/memory/ref_counted.h>
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#include <glacier/status/error.h>
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#include <glacier/status/error_or.h>
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#include <stdint.h>
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#include "memory/paging_util.h"
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class Slab : public glcr::RefCounted<Slab>,
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public glcr::IntrusiveListNode<Slab> {
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public:
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explicit Slab(uint64_t elem_size);
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Slab(Slab&) = delete;
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Slab(Slab&&) = delete;
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void* Allocate();
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void Free(void* addr);
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bool IsFull();
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uint64_t Allocations() { return num_allocated_; }
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private:
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struct FreeListEntry {
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FreeListEntry* next;
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};
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uint64_t elem_size_;
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uint64_t num_allocated_;
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FreeListEntry* first_free_;
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bool IsContained(void* addr);
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};
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class SlabAllocator {
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public:
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SlabAllocator(uint64_t elem_size) : elem_size_(elem_size) {}
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SlabAllocator(SlabAllocator&) = delete;
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glcr::ErrorOr<void*> Allocate();
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// Stats:
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uint64_t SlabCount();
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uint64_t Allocations();
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private:
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uint64_t elem_size_;
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glcr::IntrusiveList<Slab> slabs_;
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};
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