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pub const RUSAGE_INFO_V0: libc::c_int = 0;
pub const RUSAGE_INFO_V1: libc::c_int = 1;
pub const RUSAGE_INFO_V2: libc::c_int = 2;
pub const RUSAGE_INFO_V3: libc::c_int = 3;
pub const RUSAGE_INFO_V4: libc::c_int = 4;
pub const RUSAGE_INFO_CURRENT: libc::c_int = RUSAGE_INFO_V4;

#[repr(C)]
#[derive(Debug, Clone)]
pub struct rusage_info_v0 {
    pub ri_uuid: [u8; 16],
    pub ri_user_time: u64,
    pub ri_system_time: u64,
    pub ri_pkg_idle_wkups: u64,
    pub ri_interrupt_wkups: u64,
    pub ri_pageins: u64,
    pub ri_wired_size: u64,
    pub ri_resident_size: u64,
    pub ri_phys_footprint: u64,
    pub ri_proc_start_abstime: u64,
    pub ri_proc_exit_abstime: u64,
}

#[repr(C)]
#[derive(Debug, Clone)]
pub struct rusage_info_v1 {
    pub ri_uuid: [u8; 16],
    pub ri_user_time: u64,
    pub ri_system_time: u64,
    pub ri_pkg_idle_wkups: u64,
    pub ri_interrupt_wkups: u64,
    pub ri_pageins: u64,
    pub ri_wired_size: u64,
    pub ri_resident_size: u64,
    pub ri_phys_footprint: u64,
    pub ri_proc_start_abstime: u64,
    pub ri_proc_exit_abstime: u64,
    pub ri_child_user_time: u64,
    pub ri_child_system_time: u64,
    pub ri_child_pkg_idle_wkups: u64,
    pub ri_child_interrupt_wkups: u64,
    pub ri_child_pageins: u64,
    pub ri_child_elapsed_abstime: u64,
}

#[repr(C)]
#[derive(Debug, Clone)]
pub struct rusage_info_v2 {
    pub ri_uuid: [u8; 16],
    pub ri_user_time: u64,
    pub ri_system_time: u64,
    pub ri_pkg_idle_wkups: u64,
    pub ri_interrupt_wkups: u64,
    pub ri_pageins: u64,
    pub ri_wired_size: u64,
    pub ri_resident_size: u64,
    pub ri_phys_footprint: u64,
    pub ri_proc_start_abstime: u64,
    pub ri_proc_exit_abstime: u64,
    pub ri_child_user_time: u64,
    pub ri_child_system_time: u64,
    pub ri_child_pkg_idle_wkups: u64,
    pub ri_child_interrupt_wkups: u64,
    pub ri_child_pageins: u64,
    pub ri_child_elapsed_abstime: u64,
    pub ri_diskio_bytesread: u64,
    pub ri_diskio_byteswritten: u64,
}

#[repr(C)]
#[derive(Debug, Clone)]
pub struct rusage_info_v3 {
    pub ri_uuid: [u8; 16],
    pub ri_user_time: u64,
    pub ri_system_time: u64,
    pub ri_pkg_idle_wkups: u64,
    pub ri_interrupt_wkups: u64,
    pub ri_pageins: u64,
    pub ri_wired_size: u64,
    pub ri_resident_size: u64,
    pub ri_phys_footprint: u64,
    pub ri_proc_start_abstime: u64,
    pub ri_proc_exit_abstime: u64,
    pub ri_child_user_time: u64,
    pub ri_child_system_time: u64,
    pub ri_child_pkg_idle_wkups: u64,
    pub ri_child_interrupt_wkups: u64,
    pub ri_child_pageins: u64,
    pub ri_child_elapsed_abstime: u64,
    pub ri_diskio_bytesread: u64,
    pub ri_diskio_byteswritten: u64,
    pub ri_cpu_time_qos_default: u64,
    pub ri_cpu_time_qos_maintenance: u64,
    pub ri_cpu_time_qos_background: u64,
    pub ri_cpu_time_qos_utility: u64,
    pub ri_cpu_time_qos_legacy: u64,
    pub ri_cpu_time_qos_user_initiated: u64,
    pub ri_cpu_time_qos_user_interactive: u64,
    pub ri_billed_system_time: u64,
    pub ri_serviced_system_time: u64,
}

#[repr(C)]
#[derive(Debug, Clone)]
pub struct rusage_info_v4 {
    pub ri_uuid: [u8; 16],
    pub ri_user_time: u64,
    pub ri_system_time: u64,
    pub ri_pkg_idle_wkups: u64,
    pub ri_interrupt_wkups: u64,
    pub ri_pageins: u64,
    pub ri_wired_size: u64,
    pub ri_resident_size: u64,
    pub ri_phys_footprint: u64,
    pub ri_proc_start_abstime: u64,
    pub ri_proc_exit_abstime: u64,
    pub ri_child_user_time: u64,
    pub ri_child_system_time: u64,
    pub ri_child_pkg_idle_wkups: u64,
    pub ri_child_interrupt_wkups: u64,
    pub ri_child_pageins: u64,
    pub ri_child_elapsed_abstime: u64,
    pub ri_diskio_bytesread: u64,
    pub ri_diskio_byteswritten: u64,
    pub ri_cpu_time_qos_default: u64,
    pub ri_cpu_time_qos_maintenance: u64,
    pub ri_cpu_time_qos_background: u64,
    pub ri_cpu_time_qos_utility: u64,
    pub ri_cpu_time_qos_legacy: u64,
    pub ri_cpu_time_qos_user_initiated: u64,
    pub ri_cpu_time_qos_user_interactive: u64,
    pub ri_billed_system_time: u64,
    pub ri_serviced_system_time: u64,
    pub ri_logical_writes: u64,
    pub ri_lifetime_max_phys_footprint: u64,
    pub ri_instructions: u64,
    pub ri_cycles: u64,
    pub ri_billed_energy: u64,
    pub ri_serviced_energy: u64,
    pub ri_interval_max_phys_footprint: u64,
    pub ri_runnable_time: u64,
}

pub type rusage_info_current = rusage_info_v4;
pub type rusage_info_t = *mut libc::c_void;

extern "C" {
    pub fn proc_pid_rusage(
        pid: libc::pid_t,
        flavor: libc::c_int,
        buffer: rusage_info_t,
    ) -> libc::c_int;
}