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Implementation of shared buffer level in the gwbuf so that one set of data can be kept with

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different offsets for different gwbufs

Updated monitor to better handle maste/slave replication environments

Split MASTER and SERVER bits in the erver bitmask so that we canhave more states, MASTER, SLAVE and NOT IN REPLICATION

Updates to the read write splitter for routing commands to all nodes, diagnostic output and fixes to the algorithm to pick up a master and slave connection
This commit is contained in:
Mark Riddoch
2013-07-11 18:37:43 +02:00
parent aea8af08ba
commit 619af90696
9 changed files with 243 additions and 135 deletions
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22
include/buffer.h
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@ -36,10 +36,21 @@
*
* Date Who Description
* 10/06/13 Mark Riddoch Initial implementation
* 11/07/13 Mark Riddoch Addition of reference count in the gwbuf
*
* @endverbatim
*/
/**
* A structure to encapsualte the data in a form that the data itself can be
* shared between multiple GWBUF's without the need to make multiple copies
* but still maintain separate data pointers.
*/
typedef struct {
unsigned char *data; /**< Physical memory that was allocated */
int refcount; /**< Reference count on the buffer */
} SHARED_BUF;
/**
* The buffer structure used by the descriptor control blocks.
*
@ -52,7 +63,7 @@ typedef struct gwbuf {
struct gwbuf *next; /**< Next buffer in a linked chain of buffers */
void *start; /**< Start of the valid data */
void *end; /**< First byte after the valid data */
unsigned char *data; /**< Physical memory that was allocated */
SHARED_BUF *sbuf; /**< The shared buffer with the real data */
} GWBUF;
/*
@ -74,10 +85,11 @@ typedef struct gwbuf {
/*
* Function prototypes for the API to maniplate the buffers
*/
extern GWBUF *gwbuf_alloc(unsigned int size);
extern void gwbuf_free(GWBUF *buf);
extern GWBUF *gwbuf_append(GWBUF *head, GWBUF *tail);
extern GWBUF *gwbuf_consume(GWBUF *head, unsigned int length);
extern GWBUF *gwbuf_alloc(unsigned int size);
extern void gwbuf_free(GWBUF *buf);
extern GWBUF *gwbuf_clone(GWBUF *buf);
extern GWBUF *gwbuf_append(GWBUF *head, GWBUF *tail);
extern GWBUF *gwbuf_consume(GWBUF *head, unsigned int length);
extern unsigned int gwbuf_length(GWBUF *head);