ladybird/Kernel/Syscalls/resource.cpp

39 lines
1.0 KiB
C++

/*
* Copyright (c) 2022, Lucas Chollet <lucas.chollet@free.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Tasks/Process.h>
#include <Kernel/Time/TimeManagement.h>
namespace Kernel {
ErrorOr<FlatPtr> Process::sys$getrusage(int who, Userspace<rusage*> user_usage)
{
VERIFY_NO_PROCESS_BIG_LOCK(this);
rusage usage {};
auto const ticks_per_second = TimeManagement::the().ticks_per_second();
switch (who) {
case RUSAGE_SELF:
usage.ru_utime = Duration::from_ticks(m_ticks_in_user, ticks_per_second).to_timeval();
usage.ru_stime = Duration::from_ticks(m_ticks_in_kernel, ticks_per_second).to_timeval();
break;
case RUSAGE_CHILDREN:
usage.ru_utime = Duration::from_ticks(m_ticks_in_user_for_dead_children, ticks_per_second).to_timeval();
usage.ru_stime = Duration::from_ticks(m_ticks_in_kernel_for_dead_children, ticks_per_second).to_timeval();
break;
default:
return EINVAL;
}
TRY(copy_to_user(user_usage, &usage));
return 0;
}
}