tsiginfo._sifields variable

_sifields: record
case LongInt of
0: (
 _pad: Array[0..(SI_PAD_SIZE)-1] of LongInt;
);
1: (
 _kill: record
 _pid: pid_t;
 _uid: uid_t;
 end;
);
2: (
 _timer: record
 _timer1: DWord;
 _timer2: DWord;
 end;
);
3: (
 _rt: record
 _pid: pid_t;
 _uid: uid_t;
 _sigval: pointer;
 end;
);
4: (
 _sigchld: record
 _pid: pid_t;
 _uid: uid_t;
 _status: LongInt;
 _utime: clock_t;
 _stime: clock_t;
 end;
);
5: (
 _sigfault: record
 _addr: pointer;
 end;
);
6: (
 _sigpoll: record
 _band: LongInt;
 _fd: LongInt;
 end;
);
end