sysinfo 0.34.2

Library to get system information such as processes, CPUs, disks, components and networks
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// Take a look at the license at the top of the repository in the LICENSE file.

#![allow(non_camel_case_types, dead_code)]

use libc::{c_char, c_int, c_uint, c_ulong, c_void, uintptr_t};

// definitions come from:
// https://github.com/freebsd/freebsd-src/blob/main/lib/libdevstat/devstat.h
// https://github.com/freebsd/freebsd-src/blob/main/sys/sys/devicestat.h

// #[repr(C)]
// pub(crate) struct statinfo {
//     pub(crate) cp_time: [c_long; CPUSTATES as usize],
//     pub(crate) tk_nin: c_long,
//     pub(crate) tk_nout: c_long,
//     pub(crate) dinfo: *mut devinfo,
//     pub(crate) snap_time: c_long_double,
// }

// FIXME: can be removed once https://github.com/rust-lang/libc/pull/4327 is merged
#[repr(C)]
pub(crate) struct filedesc {
    pub fd_files: *mut fdescenttbl,
    pub fd_map: *mut c_ulong,
    pub fd_freefile: c_int,
    pub fd_refcnt: c_int,
    pub fd_holdcnt: c_int,
    fd_sx: sx,
    fd_kqlist: kqlist,
    pub fd_holdleaderscount: c_int,
    pub fd_holdleaderswakeup: c_int,
}

// FIXME: can be removed once https://github.com/rust-lang/libc/pull/4327 is merged
#[repr(C)]
pub(crate) struct fdescenttbl {
    pub fdt_nfiles: c_int,
    fdt_ofiles: [*mut c_void; 0],
}

// FIXME: can be removed once https://github.com/rust-lang/libc/pull/4327 is merged
#[repr(C)]
pub(crate) struct sx {
    lock_object: lock_object,
    sx_lock: uintptr_t,
}

// FIXME: can be removed once https://github.com/rust-lang/libc/pull/4327 is merged
#[repr(C)]
pub(crate) struct lock_object {
    lo_name: *const c_char,
    lo_flags: c_uint,
    lo_data: c_uint,
    // This is normally `struct  witness`.
    lo_witness: *mut c_void,
}

// FIXME: can be removed once https://github.com/rust-lang/libc/pull/4327 is merged
#[repr(C)]
pub(crate) struct kqlist {
    tqh_first: *mut c_void,
    tqh_last: *mut *mut c_void,
}

pub(crate) const DEVSTAT_READ: usize = 0x01;
pub(crate) const DEVSTAT_WRITE: usize = 0x02;

// pub(crate) const DSM_NONE: c_int = 0;
// pub(crate) const DSM_TOTAL_BYTES_READ: c_int = 2;
// pub(crate) const DSM_TOTAL_BYTES_WRITE: c_int = 3;

extern "C" {
    // pub(crate) fn devstat_compute_statistics(current: *mut devstat, previous: *mut devstat, etime: c_long_double, ...) -> c_int;
}

#[link(name = "geom")]
extern "C" {
    pub(crate) fn geom_stats_open() -> c_int;
    pub(crate) fn geom_stats_snapshot_get() -> *mut c_void;
    pub(crate) fn geom_stats_snapshot_next(arg: *mut c_void) -> *mut libc::devstat;
    pub(crate) fn geom_stats_snapshot_reset(arg: *mut c_void);
    pub(crate) fn geom_stats_snapshot_free(arg: *mut c_void);
}