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Annotation of xinu/sys/mkpool.c, revision 1.1.1.1

1.1       root        1: /* mkpool.c - mkpool */
                      2: 
                      3: #include <conf.h>
                      4: #include <kernel.h>
                      5: #include <mark.h>
                      6: #include <bufpool.h>
                      7: 
                      8: /*------------------------------------------------------------------------
                      9:  *  mkpool  --  allocate memory for a buffer pool and link together
                     10:  *------------------------------------------------------------------------
                     11:  */
                     12: SYSCALL        mkpool(bufsiz, numbufs)
                     13: int    bufsiz, numbufs;
                     14: {
                     15:        PStype  ps;
                     16:        int     poolid;
                     17:        char    *where;
                     18: 
                     19: #ifdef MEMMARK
                     20:        if ( unmarked(bpmark) )
                     21:                poolinit();
                     22: #endif
                     23:        disable(ps);
                     24:        if (bufsiz<BPMINB || bufsiz>BPMAXB
                     25:            || numbufs<1 || numbufs>BPMAXN
                     26:            || nbpools >= NBPOOLS
                     27:            || (where=(char *)getmem((bufsiz+sizeof(int))*numbufs))
                     28:                    == (char *)SYSERR) {
                     29:                restore(ps);
                     30:                return(SYSERR);
                     31:        }
                     32:        poolid = nbpools++;
                     33:        bptab[poolid].bpnext = where;
                     34:        bptab[poolid].bpsize = bufsiz;
                     35:        bptab[poolid].bpsem = screate(numbufs);
                     36:        bufsiz+=sizeof(int);
                     37:        for (numbufs-- ; numbufs>0 ; numbufs--,where+=bufsiz)
                     38:                *( (int *) where ) = (int)(where+bufsiz);
                     39:        *( (int *) where) = (int) NULL;
                     40:        restore(ps);
                     41:        return(poolid);
                     42: }

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