ladybird/Kernel/Syscalls/times.cpp

30 lines
817 B
C++

/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Tasks/Process.h>
#include <Kernel/Time/TimeManagement.h>
namespace Kernel {
ErrorOr<FlatPtr> Process::sys$times(Userspace<tms*> user_times)
{
VERIFY_NO_PROCESS_BIG_LOCK(this);
TRY(require_promise(Pledge::stdio));
// There's no lock here, as it seems harmless to report intermediate values
// as long as each individual counter is intact.
tms times = {};
times.tms_utime = m_ticks_in_user;
times.tms_stime = m_ticks_in_kernel;
times.tms_cutime = m_ticks_in_user_for_dead_children;
times.tms_cstime = m_ticks_in_kernel_for_dead_children;
TRY(copy_to_user(user_times, &times));
return TimeManagement::the().uptime_ms() & 0x7fffffff;
}
}