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https://github.com/SerenityOS/serenity
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Similarly to VFSRootContext and ScopedProcessList, this class intends to form resource isolation as well. We add this class as an infrastructure preparation of hostname contexts which should allow processes to obtain different hostnames on the same machine.
57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
/*
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* Copyright (c) 2024, Liav A. <liavalb@hotmail.co.il>
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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/AtomicRefCounted.h>
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#include <AK/FixedStringBuffer.h>
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#include <AK/IntrusiveList.h>
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#include <AK/IntrusiveListRelaxedConst.h>
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#include <AK/Noncopyable.h>
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#include <AK/RefPtr.h>
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#include <Kernel/API/POSIX/sys/utsname.h>
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#include <Kernel/Forward.h>
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#include <Kernel/Locking/SpinlockProtected.h>
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namespace Kernel {
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class HostnameContext : public AtomicRefCounted<HostnameContext> {
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AK_MAKE_NONCOPYABLE(HostnameContext);
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AK_MAKE_NONMOVABLE(HostnameContext);
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friend class Process;
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public:
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AK_TYPEDEF_DISTINCT_ORDERED_ID(u64, IndexID);
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static ErrorOr<NonnullRefPtr<HostnameContext>> create_initial();
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static ErrorOr<NonnullRefPtr<HostnameContext>> create_with_name(StringView name);
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static ErrorOr<NonnullRefPtr<HostnameContext>> hostname_context_for_id(int id);
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SpinlockProtected<FixedStringBuffer<UTSNAME_ENTRY_LEN - 1>, LockRank::None>& buffer() { return m_buffer; }
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SpinlockProtected<FixedStringBuffer<UTSNAME_ENTRY_LEN - 1>, LockRank::None> const& buffer() const { return m_buffer; }
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IndexID id() const { return m_id; }
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void detach(Badge<Process>);
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void set_attached(Badge<Process>);
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private:
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HostnameContext(StringView name);
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IntrusiveListNode<HostnameContext, NonnullRefPtr<HostnameContext>> m_list_node;
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SpinlockProtected<size_t, LockRank::None> m_attach_count { 0 };
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SpinlockProtected<FixedStringBuffer<UTSNAME_ENTRY_LEN - 1>, LockRank::None> m_buffer;
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IndexID m_id;
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public:
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using List = IntrusiveListRelaxedConst<&HostnameContext::m_list_node>;
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};
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}
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