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b847541ee8
The C++ standard says that it's legal to call the `delete` operator with a null pointer argument, in which case it should be a no-op. I encountered this issue when running a kernel that's compiled with Clang. I assume this fact was used for some kind of optimization.
43 lines
1.9 KiB
C++
43 lines
1.9 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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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/Function.h>
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#include <AK/Types.h>
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namespace Kernel {
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#define SLAB_ALLOC_SCRUB_BYTE 0xab
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#define SLAB_DEALLOC_SCRUB_BYTE 0xbc
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void* slab_alloc(size_t slab_size);
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void slab_dealloc(void*, size_t slab_size);
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void slab_alloc_init();
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void slab_alloc_stats(Function<void(size_t slab_size, size_t allocated, size_t free)>);
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#define MAKE_SLAB_ALLOCATED(type) \
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public: \
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[[nodiscard]] void* operator new(size_t) \
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{ \
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void* ptr = slab_alloc(sizeof(type)); \
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VERIFY(ptr); \
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return ptr; \
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} \
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[[nodiscard]] void* operator new(size_t, const std::nothrow_t&) noexcept \
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{ \
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return slab_alloc(sizeof(type)); \
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} \
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void operator delete(void* ptr) noexcept \
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{ \
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if (!ptr) \
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return; \
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slab_dealloc(ptr, sizeof(type)); \
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} \
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\
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private:
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}
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