mlock(3C) — DG/UX 4.30



     mlock(3C)                  DG/UX 4.30                   mlock(3C)



     NAME
          mlock, munlock - lock (or unlock) pages in memory

     SYNOPSIS
          #include <sys/types.h>
          int mlock(caddrt addr, sizet len);
          int munlock(caddrt addr, sizet len);

     DESCRIPTION
          The function mlock uses the mappings established for the
          address range [addr, addr + len) to identify pages to be
          locked in memory.  The effect of mlock(addr, len) is
          equivalent to memcntl(addr, len, MCLOCK, 0, 0, 0).

          munlock removes locks established with mlock.  The effect of
          munlock(addr, len) is equivalent to memcntl(addr, len,
          MCUNLOCK, 0, 0, 0).

          Locks established with mlock are not inherited by a child
          process after a fork and are not nested.

     RETURN VALUE
          Upon successful completion, the functions mlock and munlock
          return a value of 0; otherwise, they return a value of -1
          and set errno to indicate an error.

     ERRORS
          See memcntl(2).

     NOTES
          Use of mlock and munlock requires that the user have
          appropriate privileges.

     SEE ALSO
          fork(2), memcntl(2), mlockall(3C), plock(2), sysconf(3C).




















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