mirror of
https://github.com/RGBCube/serenity
synced 2025-07-25 03:37:34 +00:00
Everywhere: Move global Kernel pattern code to Kernel/Library directory
This has KString, KBuffer, DoubleBuffer, KBufferBuilder, IOWindow, UserOrKernelBuffer and ScopedCritical classes being moved to the Kernel/Library subdirectory. Also, move the panic and assertions handling code to that directory.
This commit is contained in:
parent
f1cbfc5a6e
commit
7c0540a229
193 changed files with 238 additions and 240 deletions
66
Kernel/Library/KBuffer.h
Normal file
66
Kernel/Library/KBuffer.h
Normal file
|
@ -0,0 +1,66 @@
|
|||
/*
|
||||
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
// KBuffer: Memory buffer backed by a kernel region.
|
||||
//
|
||||
// The memory is allocated via the global kernel-only page allocator, rather than via
|
||||
// kmalloc() which is what ByteBuffer/Vector/etc will use.
|
||||
//
|
||||
// This makes KBuffer a little heavier to allocate, but much better for large and/or
|
||||
// long-lived allocations, since they don't put all that weight and pressure on the
|
||||
// severely limited kmalloc heap.
|
||||
|
||||
#include <AK/Assertions.h>
|
||||
#include <AK/StringView.h>
|
||||
#include <Kernel/Library/StdLib.h> // For memcpy. FIXME: Make memcpy less expensive to access a declaration of in the Kernel.
|
||||
#include <Kernel/Memory/MemoryManager.h>
|
||||
|
||||
namespace Kernel {
|
||||
|
||||
class [[nodiscard]] KBuffer {
|
||||
public:
|
||||
static ErrorOr<NonnullOwnPtr<KBuffer>> try_create_with_size(StringView name, size_t size, Memory::Region::Access access = Memory::Region::Access::ReadWrite, AllocationStrategy strategy = AllocationStrategy::Reserve)
|
||||
{
|
||||
auto rounded_size = TRY(Memory::page_round_up(size));
|
||||
auto region = TRY(MM.allocate_kernel_region(rounded_size, name, access, strategy));
|
||||
return TRY(adopt_nonnull_own_or_enomem(new (nothrow) KBuffer { size, move(region) }));
|
||||
}
|
||||
|
||||
static ErrorOr<NonnullOwnPtr<KBuffer>> try_create_with_bytes(StringView name, ReadonlyBytes bytes, Memory::Region::Access access = Memory::Region::Access::ReadWrite, AllocationStrategy strategy = AllocationStrategy::Reserve)
|
||||
{
|
||||
auto buffer = TRY(try_create_with_size(name, bytes.size(), access, strategy));
|
||||
memcpy(buffer->data(), bytes.data(), bytes.size());
|
||||
return buffer;
|
||||
}
|
||||
|
||||
[[nodiscard]] u8* data() { return m_region->vaddr().as_ptr(); }
|
||||
[[nodiscard]] u8 const* data() const { return m_region->vaddr().as_ptr(); }
|
||||
[[nodiscard]] size_t size() const { return m_size; }
|
||||
[[nodiscard]] size_t capacity() const { return m_region->size(); }
|
||||
|
||||
[[nodiscard]] ReadonlyBytes bytes() const { return { data(), size() }; }
|
||||
[[nodiscard]] Bytes bytes() { return { data(), size() }; }
|
||||
|
||||
void set_size(size_t size)
|
||||
{
|
||||
VERIFY(size <= capacity());
|
||||
m_size = size;
|
||||
}
|
||||
|
||||
private:
|
||||
explicit KBuffer(size_t size, NonnullOwnPtr<Memory::Region> region)
|
||||
: m_size(size)
|
||||
, m_region(move(region))
|
||||
{
|
||||
}
|
||||
|
||||
size_t m_size { 0 };
|
||||
NonnullOwnPtr<Memory::Region> m_region;
|
||||
};
|
||||
|
||||
}
|
Loading…
Add table
Add a link
Reference in a new issue