mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 04:22:45 +00:00
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++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Function.h>
|
|
#include <AK/Types.h>
|
|
|
|
namespace Kernel {
|
|
|
|
#define SLAB_ALLOC_SCRUB_BYTE 0xab
|
|
#define SLAB_DEALLOC_SCRUB_BYTE 0xbc
|
|
|
|
void* slab_alloc(size_t slab_size);
|
|
void slab_dealloc(void*, size_t slab_size);
|
|
void slab_alloc_init();
|
|
void slab_alloc_stats(Function<void(size_t slab_size, size_t allocated, size_t free)>);
|
|
|
|
#define MAKE_SLAB_ALLOCATED(type) \
|
|
public: \
|
|
[[nodiscard]] void* operator new(size_t) \
|
|
{ \
|
|
void* ptr = slab_alloc(sizeof(type)); \
|
|
VERIFY(ptr); \
|
|
return ptr; \
|
|
} \
|
|
[[nodiscard]] void* operator new(size_t, const std::nothrow_t&) noexcept \
|
|
{ \
|
|
return slab_alloc(sizeof(type)); \
|
|
} \
|
|
void operator delete(void* ptr) noexcept \
|
|
{ \
|
|
if (!ptr) \
|
|
return; \
|
|
slab_dealloc(ptr, sizeof(type)); \
|
|
} \
|
|
\
|
|
private:
|
|
|
|
}
|