mirror of
https://github.com/RGBCube/serenity
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5bc7882b68
...and also make the Process tick counters clock_t instead of u32. It seems harmless to get interrupted in the middle of reading these counters and reporting slightly fewer ticks in some category.
29 lines
811 B
C++
29 lines
811 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/Process.h>
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#include <Kernel/Time/TimeManagement.h>
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namespace Kernel {
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ErrorOr<FlatPtr> Process::sys$times(Userspace<tms*> user_times)
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{
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VERIFY_NO_PROCESS_BIG_LOCK(this);
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TRY(require_promise(Pledge::stdio));
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// There's no lock here, as it seems harmless to report intermediate values
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// as long as each individual counter is intact.
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tms times = {};
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times.tms_utime = m_ticks_in_user;
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times.tms_stime = m_ticks_in_kernel;
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times.tms_cutime = m_ticks_in_user_for_dead_children;
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times.tms_cstime = m_ticks_in_kernel_for_dead_children;
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TRY(copy_to_user(user_times, ×));
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return TimeManagement::the().uptime_ms() & 0x7fffffff;
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}
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}
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