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68 lines
1.5 KiB
C++
68 lines
1.5 KiB
C++
/*
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* Copyright (c) 2022, kleines Filmröllchen <filmroellchen@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/Forward.h>
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#include <AK/Noncopyable.h>
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#if defined(KERNEL)
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# include <Kernel/Arch/Processor.h>
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# include <Kernel/Heap/kmalloc.h>
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#elif defined(AK_OS_SERENITY)
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# include <mallocdefs.h>
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#endif
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namespace AK {
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class NoAllocationGuard {
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AK_MAKE_NONCOPYABLE(NoAllocationGuard);
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AK_MAKE_NONMOVABLE(NoAllocationGuard);
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public:
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NoAllocationGuard()
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: m_allocation_enabled_previously(get_thread_allocation_state())
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{
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set_thread_allocation_state(false);
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}
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~NoAllocationGuard()
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{
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set_thread_allocation_state(m_allocation_enabled_previously);
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}
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private:
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static bool get_thread_allocation_state()
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{
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#if defined(KERNEL)
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return Processor::current_thread()->get_allocation_enabled();
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#elif defined(AK_OS_SERENITY)
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// This extern thread-local lives in our LibC, which doesn't exist on other systems.
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return s_allocation_enabled;
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#else
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return true;
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#endif
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}
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static void set_thread_allocation_state(bool value)
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{
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#if defined(KERNEL)
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Processor::current_thread()->set_allocation_enabled(value);
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#elif defined(AK_OS_SERENITY)
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s_allocation_enabled = value;
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#else
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(void)value;
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#endif
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}
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bool m_allocation_enabled_previously { true };
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};
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}
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#if USING_AK_GLOBALLY
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using AK::NoAllocationGuard;
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#endif
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