sdgetv(2XNX)        (XENIX System Compatibility)        sdgetv(2XNX)


       NAME
             sdgetv - (XENIX) synchronize shared data access

       SYNOPSIS
             cc [flag . . . ] flag . . . -lx
             #include <sys/sd.h>
             int sdgetv(void *addr);
             int sdwaitv(void *addr, int vnum);

       DESCRIPTION
             sdgetv and sdwaitv may be used to synchronize cooperating
             processes that are using shared data segments.  The return
             value of both routines is the version number of the shared
             data segment attached to the process at address addr.  The
             version number of a segment changes whenever some process does
             an sdleave for that segment.

             sdgetv simply returns the version number of the indicated
             segment.

             sdwaitv forces the current process to sleep until the version
             number for the indicated segment is no longer equal to vnum.

          Return Values
             Upon successful completion, both sdgetv and sdwaitv return a
             positive integer that is the current version number for the
             indicated shared data segment.  Otherwise, a value of -1 is
             returned, and errno is set to indicate the error.

       REFERENCES
             sdenter(2XNX), sdget(2XNX)

















                           Copyright 1994 Novell, Inc.               Page 1