KEvent {.importc: "struct kevent", header: """#include <sys/types.h>
                       #include <sys/event.h>
                       #include <sys/time.h>""",
         pure, final.} = object
  ident*: uint               ## identifier for this event  (uintptr_t)
  filter*: cshort            ## filter for event
  flags*: cushort            ## general flags
  fflags*: cuint             ## filter-specific flags
  data*: int                 ## filter-specific data  (intptr_t)
  udata*: pointer            ## opaque user data identifier
  

EV_ADD = 0x00000001

EV_CLEAR = 0x00000020

EV_DELETE = 0x00000002

EV_DISABLE = 0x00000008

EV_DISPATCH = 0x00000080

EV_DROP = 0x00001000

EV_ENABLE = 0x00000004

EV_EOF = 0x00008000

EV_ERROR = 0x00004000

EV_FLAG1 = 0x00002000

EV_NODATA = 0x00001000

EV_ONESHOT = 0x00000010

EV_RECEIPT = 0x00000040

EV_SYSFLAGS = 0x0000F000

NOTE_ATTRIB = 0x00000008

NOTE_CHILD = 0x00000004'u32

NOTE_DELETE = 0x00000001

NOTE_EXEC = 0x20000000'u32

NOTE_EXIT = 0x80000000'u32

NOTE_EXTEND = 0x00000004

NOTE_FORK = 0x40000000'u32

NOTE_LINK = 0x00000010

NOTE_LOWAT = 0x00000001

NOTE_MSECONDS = 0x00000000'u32

NOTE_PCTRLMASK = 0xF0000000'u32

NOTE_PDATAMASK = 0x000FFFFF'u32

NOTE_RENAME = 0x00000020

NOTE_REVOKE = 0x00000040

NOTE_TRACK = 0x00000001'u32

NOTE_TRACKERR = 0x00000002'u32

NOTE_WRITE = 0x00000002

proc EV_SET(event: ptr KEvent; ident: uint; filter: cshort; flags: cushort;
            fflags: cuint; data: int; udata: pointer) {.importc: "EV_SET",
    header: "<sys/event.h>", ...raises: [], tags: [].}

proc kevent(kqFD: cint; changelist: ptr KEvent; nchanges: cint;
            eventlist: ptr KEvent; nevents: cint; timeout: ptr Timespec): cint {.
    importc: "kevent", header: "<sys/event.h>", ...raises: [], tags: [].}

proc kqueue(): cint {.importc: "kqueue", header: "<sys/event.h>", ...raises: [],
                      tags: [].}