greenplumn uuid 源码
greenplumn uuid 代码
文件路径：/src/include/utils/uuid.h
/*-------------------------------------------------------------------------
*
* uuid.h
* Header file for the "uuid" ADT. In C, we use the name pg_uuid_t,
* to avoid conflicts with any uuid_t type that might be defined by
* the system headers.
*
* Copyright (c) 2007-2019, PostgreSQL Global Development Group
*
* src/include/utils/uuid.h
*
*-------------------------------------------------------------------------
*/
#ifndef UUID_H
#define UUID_H
/* uuid size in bytes */
#define UUID_LEN 16
typedef struct pg_uuid_t
{
unsigned char data[UUID_LEN];
} pg_uuid_t;
/* fmgr interface macros */
#define UUIDPGetDatum(X) PointerGetDatum(X)
#define PG_RETURN_UUID_P(X) return UUIDPGetDatum(X)
#define DatumGetUUIDP(X) ((pg_uuid_t *) DatumGetPointer(X))
#define PG_GETARG_UUID_P(X) DatumGetUUIDP(PG_GETARG_DATUM(X))
#endif /* UUID_H */
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