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Annotation of xinu/sys/dgalloc.c, revision 1.1

1.1     ! root        1: /* dgalloc.c - dgalloc */
        !             2: 
        !             3: #include <conf.h>
        !             4: #include <kernel.h>
        !             5: #include <network.h>
        !             6: 
        !             7: /*------------------------------------------------------------------------
        !             8:  *  dgalloc  -  allocate a datagram psuedo device and return descriptor
        !             9:  *------------------------------------------------------------------------
        !            10:  */
        !            11: dgalloc()
        !            12: {
        !            13:        struct  dgblk   *dgptr;
        !            14:        int     i;
        !            15:        PStype  ps;
        !            16: 
        !            17:        disable(ps);
        !            18:        for (i=0 ; i<Ndg ; i++) {
        !            19:                dgptr = &dgtab[i];
        !            20:                if (dgptr->dg_state == DG_FREE) {
        !            21:                        dgptr->dg_state = DG_USED;
        !            22:                        restore(ps);
        !            23:                        return(i);
        !            24:                }
        !            25:        }
        !            26:        restore(ps);
        !            27:        return(SYSERR);
        !            28: }

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