#include "types.h"
#include "defs.h"
#include "param.h"
#include "stat.h"
#include "mmu.h"
#include "proc.h"
#include "spinlock.h"
#include "buf.h"
#include "fs.h"
#include "file.h"
#interface "fs.dg"

// ----
// typedef struct fs_impl<Impl, Isa> impl fs{
//     union Data* fs_impl;
// 
// 
// 
// 
// } fs_impl;
// ----

fs* createfs_impl(struct Context* cbc_context) {
    struct fs* fs  = new fs();
    struct fs_impl* fs_impl = new fs_impl();
    fs->fs = (union Data*)fs_impl;
    fs_impl->fs_impl = NULL;
    fs->readsb = C_readsbfs_impl;
    fs->iinit = C_iinitfs_impl;
    fs->ialloc = C_iallocfs_impl;
    fs_impl->allocinode = C_allocinode;
    fs_impl->allocinode_loop = C_allocinode_loop;
    fs_impl->allocinode_loopcheck = C_allocinode_loopcheck;
    fs_impl->allocinode_noloop = C_allocinode_noloop;
    fs->iupdate = C_iupdatefs_impl;
    fs->idup = C_idupfs_impl;
    fs->ilock = C_ilockfs_impl;
    fs_impl->lockinode1 = C_lockinode1;
    fs_impl->lockinode_sleepcheck = C_lockinode_sleepcheck;
    fs->iunlock = C_iunlockfs_impl;
    fs->iput = C_iputfs_impl;
    fs->iunlockput = C_iunlockputfs_impl;
    fs->stati = C_statifs_impl;
    fs->readi = C_readifs_impl;
    fs->writei = C_writeifs_impl;
    fs->namecmp = C_namecmpfs_impl;
    fs->dirlookup = C_dirlookupfs_impl;
    fs->dirlink = C_dirlinkfs_impl;
    fs->namei = C_nameifs_impl;
    fs->nameiparent = C_nameiparentfs_impl;
    return fs;
}

typedef struct superblock superblock;
__code readsbfs_impl(struct fs_impl* fs, uint dev, struct superblock* sb, __code next(...)) { //:skip

    struct buf* bp;

    bp = bread(dev, 1);
    memmove(sb, bp->data, sizeof(*sb));
    brelse(bp);

    goto next(...);
}

struct {
    struct spinlock lock;
    struct inode inode[NINODE];
} icache;

__code iinitfs_impl(struct fs_impl* fs, __code next(...)) {

     initlock(&icache.lock, "icache");

    goto next(...);
}

__code iallocfs_impl(struct fs_impl* fs, uint dev, short type, __code next(...)) {
    goto allocinode(fs, dev, sb, next(...));
}

__code iupdatefs_impl(struct fs_impl* fs, struct inode* ip, __code next(...)) {

    struct buf *bp;
    struct dinode *dip;

    bp = bread(ip->dev, IBLOCK(ip->inum));

    dip = (struct dinode*) bp->data + ip->inum % IPB;
    dip->type = ip->type;
    dip->major = ip->major;
    dip->minor = ip->minor;
    dip->nlink = ip->nlink;
    dip->size = ip->size;

    memmove(dip->addrs, ip->addrs, sizeof(ip->addrs));
    log_write(bp);
    brelse(bp);


    goto next(...);
}

__code idupfs_impl(struct fs_impl* fs, struct inode* ip, __code next(...)) {

    acquire(&icache.lock);
    ip->ref++;
    release(&icache.lock);
    
    goto next(ip, ...);

}

__code ilockfs_impl(struct fs_impl* fs, struct inode* ip, __code next(...)) {

    goto lockinode1(fs, ip, bp, dip, next(...));
}

__code iunlockfs_impl(struct fs_impl* fs, struct inode* ip, __code next(...)) {

    goto next(...);
}

__code iputfs_impl(struct fs_impl* fs, struct inode* ip, __code next(...)) {

    goto next(...);
}

__code iunlockputfs_impl(struct fs_impl* fs, struct inode* ip, __code next(...)) {

    goto next(...);
}

typedef struct stat stat;
__code statifs_impl(struct fs_impl* fs , struct inode* ip, struct stat* st, __code next(...)) { //:skip

    goto next(...);
}

__code readifs_impl(struct fs_impl* fs, struct inode* ip, char* dst, uint off, uint n, __code next(...)) {

    goto next(...);
}

__code writeifs_impl(struct fs_impl* fs, struct inode* ip, char* src, uint off, uint n, __code next(...)) {

    goto next(...);
}

__code namecmpfs_impl(struct fs_impl* fs, const char* s, const char* t, __code next(...)) {

    goto next(...);
}

__code dirlookupfs_impl(struct inode* dp, char* name, uint* poff, __code next(...)) {

    goto next(...);
}

__code dirlinkfs_impl(struct fs_impl* fs, struct inode* dp, char* name, uint inum, __code next(...)) {

    goto next(...);
}

__code nameifs_impl(struct fs_impl* fs, char* path, __code next(...)) {

    goto next(...);
}

__code nameiparentfs_impl(struct fs_impl* fs, char* path, char* name, __code next(...)) {

    goto next(...);
}