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 5.0 May 6, 2008 NetBSD 5.0
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