#pragma once
#define packed __attribute__((packed))

/*
 * time
 */

/* timeval */
typedef struct sys·TimeStamp sys·TimeStamp;
typedef struct sys·TimeValue sys·TimeValue;

struct sys·TimeStamp
{
    int64  sec;
    uint32 nano;
    int32  femto;
};

struct sys·TimeValue
{
    int64 sec;
    int64 micro;
};

/* resource */
typedef struct sys·UsageInfo sys·UsageInfo;

/* rusage */
struct sys·UsageInfo
{
    sys·TimeValue cpu;
    sys·TimeValue sys;
    /* linux extensions */
   long  maxrss;       /* maximum resident set size */
   long  ixrss;        /* integral shared memory size */
   long  idrss;        /* integral unshared data size */
   long  isrss;        /* integral unshared stack size */
   struct packed {
       long minor;     /* page reclaims (soft page faults) */
       long major;     /* page faults (hard page faults) */
   }fault;
   long  nswap;        /* swaps */
   long  iblk;         /* block input operations */
   long  oblk;         /* block output operations */
   long  msgsent;      /* IPC messages sent */
   long  msgrcvd;      /* IPC messages received */
   long  nsignal;      /* signals received */
   long  nvctxsw;      /* voluntary context switches */
   long  nictxsw;      /* involuntary context switches */
    /* room for more... */
    long    __reserved[16];
};

/*
 * files
 */

typedef struct sys·Info      sys·Info;
typedef struct sys·Directory sys·Directory;
typedef struct sys·DirEntry  sys·DirEntry;

/* statx */
struct sys·Info
{
    uint32 mask;
    uint32 blksize;
    uint64 attr;
    uint32 nlink;
    uint32 uid;
    uint32 gid;
    uint16 mode;
    uint16 _pad;
    uint64 inode;
    uint64 size;
    uint64 nblk;
    uint64 attrmask;

    sys·TimeStamp access, create, status, modify;

    struct packed{
        uint32 major;
        uint32 minor;
    }spdev;
    struct{
        uint32 major;
        uint32 minor;
    }device;

    uint64 spare[14];
};

struct sys·Directory
{
    intptr off;
    int fd;
    int pad;
    int pos, end;
    /* buf needs fall on (off_t) 8 byte alignment */
    char buf[2048];
};

struct sys·DirEntry
{
    ulong  ino;    /* inode number */
    ulong  off;    /* offset to next entry (from start of directory */
    ushort len;    /* length of entry (in bytes) */
    uchar  type;   /* filetype */
    char   name[]; /* filename */
};

#undef packed