greenplumn ic_proxy_key 源码
greenplumn ic_proxy_key 代码
文件路径：/src/backend/cdb/motion/ic_proxy_key.h
/*-------------------------------------------------------------------------
*
* ic_proxy_key.h
*
*
* Copyright (c) 2020-Present VMware, Inc. or its affiliates.
*
*
*-------------------------------------------------------------------------
*/
#ifndef IC_PROXY_KEY_H
#define IC_PROXY_KEY_H
#include "postgres.h"
typedef struct ICProxyKey ICProxyKey;
/* we have to include it after the declaration of ICProxyKey */
#include "ic_proxy_packet.h"
/*
* XXX: sessionId and {local,remote}ContentId are only for debugging purpose,
* they are not actually part of the key.
*
* dbid and segindex are both defined as int32 in type GpId, however we define
* them as int16 to reduce the size of ICProxyKey, we also mark dbids as
* unsigned in hope that the compiler could help to catch the errors if we pass
* them in the wrong order.
*/
struct ICProxyKey
{
int16 localContentId;
uint16 localDbid;
int32 localPid;
int16 remoteContentId;
uint16 remoteDbid;
int32 remotePid;
int32 sessionId;
uint32 commandId;
int16 sendSliceIndex;
int16 recvSliceIndex;
};
extern uint32 ic_proxy_key_hash(const ICProxyKey *key, Size keysize);
extern bool ic_proxy_key_equal(const ICProxyKey *key1, const ICProxyKey *key2);
extern int ic_proxy_key_equal_for_hash(const ICProxyKey *key1,
const ICProxyKey *key2,
Size keysize);
extern void ic_proxy_key_init(ICProxyKey *key,
int32 sessionId, uint32 commandId,
int16 sendSliceIndex, int16 recvSliceIndex,
int16 localContentId, uint16 localDbid, int32 localPid,
int16 remoteContentId, uint16 remoteDbid, int32 remotePid);
extern void ic_proxy_key_from_p2c_pkt(ICProxyKey *key, const ICProxyPkt *pkt);
extern void ic_proxy_key_from_c2p_pkt(ICProxyKey *key, const ICProxyPkt *pkt);
extern void ic_proxy_key_reverse(ICProxyKey *key);
extern const char *ic_proxy_key_to_str(const ICProxyKey *key);
#endif /* IC_PROXY_KEY_H */
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