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

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

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