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/*-------------------------------------------------------------------------
*
* gtm_c.h
* Fundamental C definitions. This is included by every .c file in
* PostgreSQL (via either postgres.h or postgres_fe.h, as appropriate).
*
* Note that the definitions here are not intended to be exposed to clients
* of the frontend interface libraries --- so we don't worry much about
* polluting the namespace with lots of stuff...
*
*
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
* Portions Copyright (c) 2010-2012 Postgres-XC Development Group
*
* $PostgreSQL: pgsql/src/include/c.h,v 1.234 2009/01/01 17:23:55 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef GTM_C_H
#define GTM_C_H
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#include <stdarg.h>
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#include <sys/types.h>
#include <errno.h>
#include <pthread.h>
#include "c.h"
typedef uint32 GlobalTransactionId; /* 32-bit global transaction ids */
typedef int16 GTMProxy_ConnID;
typedef uint32 GTM_StrLen;
#define InvalidGTMProxyConnID -1
typedef pthread_t GTM_ThreadID;
typedef uint32 GTM_PGXCNodeId;
typedef uint32 GTM_PGXCNodePort;
/* Possible type of nodes for registration */
typedef enum GTM_PGXCNodeType
{
GTM_NODE_GTM_PROXY = 1,
GTM_NODE_GTM_PROXY_POSTMASTER = 2,
/* Used by Proxy to communicate with GTM and not use Proxy headers */
GTM_NODE_COORDINATOR = 3,
GTM_NODE_DATANODE = 4,
GTM_NODE_GTM = 5,
GTM_NODE_DEFAULT = 6 /* In case nothing is associated to connection */
} GTM_PGXCNodeType;
/*
* A unique handle to identify transaction at the GTM. It could just be
* an index in an array or a pointer to the structure
*
* Note: If we get rid of BEGIN transaction at the GTM, we can use GXID
* as a handle because we would never have a transaction state at the
* GTM without assigned GXID.
*/
typedef int32 GTM_TransactionHandle;
#define InvalidTransactionHandle -1
/*
* As GTM and Postgres-XC packages are separated, GTM and XC's API
* use different type names for timestamps and sequences, but they have to be the same!
*/
typedef int64 GTM_Timestamp; /* timestamp data is 64-bit based */
typedef int64 GTM_Sequence; /* a 64-bit sequence */
/* Type of sequence name used when dropping it */
typedef enum GTM_SequenceKeyType
{
GTM_SEQ_FULL_NAME, /* Full sequence key */
GTM_SEQ_DB_NAME /* DB name part of sequence key */
} GTM_SequenceKeyType;
typedef struct GTM_SequenceKeyData
{
uint32 gsk_keylen;
char *gsk_key;
GTM_SequenceKeyType gsk_type; /* see constants below */
} GTM_SequenceKeyData; /* Counter key, set by the client */
typedef GTM_SequenceKeyData *GTM_SequenceKey;
#define GTM_MAX_SEQKEY_LENGTH 1024
#define InvalidSequenceValue 0x7fffffffffffffffLL
#define SEQVAL_IS_VALID(v) ((v) != InvalidSequenceValue)
#define GTM_MAX_GLOBAL_TRANSACTIONS 16384
typedef enum GTM_IsolationLevel
{
GTM_ISOLATION_SERIALIZABLE, /* serializable txn */
GTM_ISOLATION_RC /* read-committed txn */
} GTM_IsolationLevel;
typedef struct GTM_SnapshotData
{
GlobalTransactionId sn_xmin;
GlobalTransactionId sn_xmax;
uint32 sn_xcnt;
GlobalTransactionId *sn_xip;
} GTM_SnapshotData;
typedef GTM_SnapshotData *GTM_Snapshot;
/* Define max size of node name in start up packet */
#define SP_NODE_NAME 64
typedef struct GTM_StartupPacket {
char sp_node_name[SP_NODE_NAME];
GTM_PGXCNodeType sp_remotetype;
bool sp_ispostmaster;
uint32 sp_client_id;
} GTM_StartupPacket;
typedef enum GTM_PortLastCall
{
GTM_LastCall_NONE = 0,
GTM_LastCall_SEND,
GTM_LastCall_RECV,
GTM_LastCall_READ,
GTM_LastCall_WRITE
} GTM_PortLastCall;
#define InvalidGlobalTransactionId ((GlobalTransactionId) 0)
/*
* Initial GXID value to start with, when -x option is not specified at the first run.
*
* This value is supposed to be safe enough. If initdb involves huge amount of initial
* statements/transactions, users should consider to tweak this value with explicit
* -x option.
*/
#define InitialGXIDValue_Default ((GlobalTransactionId) 10000)
#define GlobalTransactionIdIsValid(gxid) (((GlobalTransactionId) (gxid)) != InvalidGlobalTransactionId)
#define _(x) gettext(x)
#define GTM_ERRCODE_TOO_OLD_XMIN 1
#define GTM_ERRCODE_NODE_NOT_REGISTERED 2
#define GTM_ERRCODE_NODE_EXCLUDED 3
#define GTM_ERRCODE_UNKNOWN 4
#endif /* GTM_C_H */
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