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https://github.com/RGBCube/serenity
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da0b7d1737
The PCSpeaker is global and not locked anyways, so there's no need for mutual exclusion between threads in the same process.
23 lines
495 B
C++
23 lines
495 B
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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#include <Kernel/Devices/PCSpeaker.h>
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#include <Kernel/Process.h>
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namespace Kernel {
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KResultOr<FlatPtr> Process::sys$beep()
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{
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VERIFY_NO_PROCESS_BIG_LOCK(this);
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PCSpeaker::tone_on(440);
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auto result = Thread::current()->sleep(Time::from_nanoseconds(200'000'000));
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PCSpeaker::tone_off();
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if (result.was_interrupted())
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return EINTR;
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return 0;
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}
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}
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