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Annotation of xinu/sys/LSI/ibnew.c, revision 1.1.1.1

1.1       root        1: /* ibnew.c - ibnew */
                      2: 
                      3: #include <conf.h>
                      4: #include <kernel.h>
                      5: #include <io.h>
                      6: #include <disk.h>
                      7: #include <lfile.h>
                      8: #include <dir.h>
                      9: 
                     10: /*------------------------------------------------------------------------
                     11:  *  ibnew  --  allocate a new iblock from free list on disk
                     12:  *------------------------------------------------------------------------
                     13:  */
                     14: ibnew(diskdev, writedir)
                     15: int    diskdev;
                     16: Bool   writedir;
                     17: {
                     18:        struct  dir     *dirptr;
                     19:        struct  iblk    iblock;
                     20:        IBADDR  inum;
                     21:        int     i;
                     22:        int     sem;
                     23: 
                     24:        sem =  ((struct dsblk *)devtab[diskdev].dvioblk)->dflsem;
                     25:        dirptr = dsdirec(diskdev);
                     26:        wait(sem);
                     27:        inum = dirptr->d_filst;
                     28:        ibget(diskdev, inum, &iblock);
                     29:        dirptr->d_filst = iblock.ib_next;
                     30:        if (writedir)
                     31:                write(diskdev, dskbcpy(dirptr), DIRBLK);
                     32:        signal(sem);
                     33:        ibclear(&iblock, 0L);
                     34:        ibput(diskdev, inum, &iblock);
                     35:        return(inum);
                     36: }

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