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

1.1     ! root        1: /* vcuputc.c - vcuputc */
        !             2: 
        !             3: #include <conf.h>
        !             4: #include <kernel.h>
        !             5: #include <tty.h>
        !             6: #include <io.h>
        !             7: #include <vcu.h>
        !             8: #include <procreg.h>
        !             9: 
        !            10: /*------------------------------------------------------------------------
        !            11:  *  vcuputc - write one character to vax console device
        !            12:  *------------------------------------------------------------------------
        !            13:  */
        !            14: vcuputc(devptr, ch )
        !            15: struct devsw   *devptr;
        !            16: char   ch;
        !            17: {
        !            18:        struct  tty   *iptr;
        !            19:        PStype  ps;
        !            20: 
        !            21:        iptr = &tty[devptr->dvminor];
        !            22:         if ( ch==NEWLINE && iptr->ocrlf )
        !            23:                 vcuputc(devptr,RETURN);
        !            24:        disable(ps);
        !            25:        wait(iptr->osem);               /* wait for space in queue      */
        !            26:        iptr->obuff[iptr->ohead++] = ch;
        !            27:        if (iptr->ohead >= OBUFLEN)
        !            28:                iptr->ohead = 0;
        !            29:        mtpr(VCUTXCSENBL, TXCS);
        !            30:        restore(ps);
        !            31:        return(OK);
        !            32: }

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