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

1.1       root        1: /* recvclr.c - recvclr */
                      2: 
                      3: #include <conf.h>
                      4: #include <kernel.h>
                      5: #include <proc.h>
                      6: 
                      7: /*------------------------------------------------------------------------
                      8:  *  recvclr  --  clear messages, returning waiting message (if any)
                      9:  *------------------------------------------------------------------------
                     10:  */
                     11: SYSCALL        recvclr()
                     12: {
                     13:        PStype  ps;
                     14:        int     msg;
                     15: 
                     16:        disable(ps);
                     17:        if ( proctab[currpid].phasmsg ) {       /* existing message?    */
                     18:                proctab[currpid].phasmsg = FALSE;
                     19:                msg = proctab[currpid].pmsg;
                     20:        } else
                     21:                msg = OK;
                     22:        restore(ps);
                     23:        return(msg);
                     24: }

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