kvbuf.h File Reference

Low level structures used by commands for buffers. More...

Go to the source code of this file.

Data Structures
struct	lcb_CONTIGBUF
	simple buf/length structure for a contiguous series of bytes More...
struct	lcb_KEYBUF
	Common request header for all keys. More...
struct	lcb_FRAGBUF
	Structure for an IOV buffer to be supplied as a buffer. More...
struct	lcb_VALBUF
	Structure representing a value to be stored. More...

Macros
#define	LCB_KV_HEADER_AND_KEY
#define	LCB_KEYBUF_IS_EMPTY(k)
#define	LCB_KREQ_SIMPLE(req, k, nk)
	Initialize a contiguous request backed by a buffer which should be copied.

Enumerations
enum	lcb_KVBUFTYPE
	Flags indicating the storage policy for a buffer. More...

Detailed Description

Low level structures used by commands for buffers.

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Data Structure Documentation

lcb_CONTIGBUF

struct lcb_CONTIGBUF

simple buf/length structure for a contiguous series of bytes

Data Fields
const void *	bytes
size_t	nbytes	Number of total bytes.

lcb_KEYBUF

struct lcb_KEYBUF

Common request header for all keys.

Data Fields
lcb_KVBUFTYPE	type	The type of key to provide. This can currently be LCB_KV_COPY (Default) to copy the key into the pipeline buffers, or LCB_KV_HEADER_AND_KEY to provide a buffer with the header storage and the key. TODO: Currently only LCB_KV_COPY should be used. LCB_KV_HEADER_AND_KEY is used internally but may be exposed later on
lcb_CONTIGBUF	contig
lcb_U16	vbid	precomputed vbucket id

lcb_FRAGBUF

struct lcb_FRAGBUF

Structure for an IOV buffer to be supplied as a buffer.

This is currently only used for value buffers

Data Fields
lcb_IOV *	iov	An IOV array.
unsigned int	niov	Number of elements in iov array.
unsigned int	total_length	Total length of the items. This should be set, if known, to prevent the library from manually traversing the iov array to calculate the length.

lcb_VALBUF

struct lcb_VALBUF

Structure representing a value to be stored.

Data Fields
lcb_KVBUFTYPE	vtype	Value request type. This may be one of: LCB_KV_COPY: Copy over the value into LCB's own buffers Use the 'contig' field to supply the information. LCB_KV_CONTIG: The buffer is a contiguous chunk of value data. Use the 'contig' field to supply the information. LCB_KV_IOV: The buffer is a series of IOV elements. Use the 'multi' field to supply the information.
union lcb_VALBUF.u_buf	u_buf

Macro Definition Documentation

LCB_KREQ_SIMPLE

#define LCB_KREQ_SIMPLE	(		req,
			k,
			nk )

Initialize a contiguous request backed by a buffer which should be copied.

Parameters

req	the key request to initialize
k	the key to copy
nk	the size of the key

Enumeration Type Documentation

lcb_KVBUFTYPE

enum lcb_KVBUFTYPE

Flags indicating the storage policy for a buffer.

Enumerator
LCB_KV_COPY	The buffer should be copied.
LCB_KV_CONTIG	The buffer is contiguous and should not be copied.
LCB_KV_IOV	The buffer is not contiguous and should not be copied.
LCB_KV_VBID	Indicates that the precomputed vBucket ID should be used.
LCB_KV_IOVCOPY	The buffers are not contiguous (multi-part buffers) but should be copied. This avoids having to make the buffers contiguous before passing it into the library (only to have the library copy it again)