greenplumn cdbfts 源码
greenplumn cdbfts 代码
文件路径：/src/include/cdb/cdbfts.h
/*-------------------------------------------------------------------------
* cdbfts.h
*
*
*-------------------------------------------------------------------------
*/
#ifndef CDBFTS_H
#define CDBFTS_H
#include "storage/lwlock.h"
#include "cdb/cdbconn.h"
#include "utils/guc.h"
#include "cdb/cdbgang.h"
#define FTS_MAX_DBS (128 * 1024)
/*
* There used to many more states here but currently dispatch is only checking
* if segment is UP or not. So just have that, when needed for other states
* this can be extended.
*/
#define FTS_STATUS_DOWN (1<<0)
#define FTS_STATUS_TEST(status, flag) (((status) & (flag)) ? true : false)
#define FTS_STATUS_IS_DOWN(status) FTS_STATUS_TEST((status), FTS_STATUS_DOWN)
#define FTS_STATUS_SET(status, flag) ((status) |= (flag))
#define FTS_STATUS_SET_DOWN(status) FTS_STATUS_SET((status), FTS_STATUS_DOWN)
#define FTS_STATUS_RESET(status, flag) ((status) &= ~(flag))
#define FTS_STATUS_SET_UP(status) FTS_STATUS_RESET((status), FTS_STATUS_DOWN)
typedef struct FtsProbeInfo
{
volatile uint8 status_version;
volatile uint8 status[FTS_MAX_DBS];
volatile slock_t lock;
volatile int32 start_count;
volatile int32 done_count;
} FtsProbeInfo;
typedef struct FtsControlBlock
{
FtsProbeInfo fts_probe_info;
pid_t fts_probe_pid;
} FtsControlBlock;
extern volatile FtsProbeInfo *ftsProbeInfo;
extern int FtsShmemSize(void);
extern void FtsShmemInit(void);
extern bool FtsIsSegmentDown(CdbComponentDatabaseInfo *dBInfo);
extern bool FtsTestSegmentDBIsDown(SegmentDatabaseDescriptor **, int);
extern void FtsNotifyProber(void);
extern uint8 getFtsVersion(void);
#endif /* CDBFTS_H */
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