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ac7ce12123
This was a premature optimization from the early days of SerenityOS. The eternal heap was a simple bump pointer allocator over a static byte array. My original idea was to avoid heap fragmentation and improve data locality, but both ideas were rooted in cargo culting, not data. We would reserve 4 MiB at boot and only ended up using ~256 KiB, wasting the rest. This patch replaces all kmalloc_eternal() usage by regular kmalloc().
55 lines
1.1 KiB
C++
55 lines
1.1 KiB
C++
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Daniel Bertalan <dani@danielbertalan.dev>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Checked.h>
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#if defined(KERNEL)
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# include <Kernel/Heap/kmalloc.h>
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#else
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# include <new>
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# include <stdlib.h>
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# define kcalloc calloc
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# define kmalloc malloc
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# define kmalloc_good_size malloc_good_size
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# define kfree free
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inline void kfree_sized(void* ptr, size_t)
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{
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kfree(ptr);
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}
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#endif
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#ifndef __serenity__
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# include <AK/Types.h>
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# ifndef AK_OS_MACOS
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extern "C" {
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inline size_t malloc_good_size(size_t size) { return size; }
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}
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# else
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# include <malloc/malloc.h>
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# endif
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#endif
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using std::nothrow;
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inline void* kmalloc_array(Checked<size_t> a, Checked<size_t> b)
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{
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auto size = a * b;
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VERIFY(!size.has_overflow());
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return kmalloc(size.value());
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}
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inline void* kmalloc_array(Checked<size_t> a, Checked<size_t> b, Checked<size_t> c)
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{
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auto size = a * b * c;
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VERIFY(!size.has_overflow());
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return kmalloc(size.value());
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}
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