659f122c9e
This reduces the number of active allocs by ~ 200. Size 8: 142 -> 2 Size 16: 319 > 313 Size 32: 364-> 312
52 lines
1 KiB
C++
52 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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void SlabFree(void* addr);
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