getiobuf(9) - NetBSD Manual Pages

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GETIOBUF(9)            NetBSD Kernel Developer's Manual            GETIOBUF(9)


NAME

     getiobuf, putiobuf -- I/O descriptor allocation interface


SYNOPSIS

     #include <sys/buf.h>

     struct buf *
     getiobuf(struct vnode *vp, bool waitok);

     void
     putiobuf(struct buf *bp);


DESCRIPTION

     getiobuf() allocates a buf structure.

     vp      The vnode to which the allocated buffer will be associated.  This
             can be NULL.

     waitok  If true, getiobuf can sleep until enough memory is available.
             Otherwise, it returns NULL immediately if enough memory is not
             available.

     Note that the allocated buffer doesn't belong to buffer cache.  To free
     it, putiobuf() should be used.  brelse() should not be used on it.

     putiobuf() frees bp, which should be a buffer allocated with getiobuf().


SEE ALSO

     buffercache(9), intro(9)

NetBSD 5.1                        May 6, 2008                       NetBSD 5.1