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/*-------------------------------------------------------------------------
*
* libpq-int.h
* This file contains internal definitions meant to be used only by
* the frontend libpq library, not by applications that call it.
*
* An application can include this file if it wants to bypass the
* official API defined by libpq-fe.h, but code that does so is much
* more likely to break across PostgreSQL releases than code that uses
* only the official API.
*
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
* Portions Copyright (c) 2010 Nippon Telegraph and Telephone Corporation
*
* $PostgreSQL: pgsql/src/interfaces/libpq/libpq-int.h,v 1.139 2009/01/01 17:24:03 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef LIBPQ_INT_H
#define LIBPQ_INT_H
#include <time.h>
#include <sys/types.h>
#include <sys/time.h>
#include "gtm/pqcomm.h"
#include "gtm/pqexpbuffer.h"
#include "gtm/gtm_client.h"
/*
* GTM_Conn stores all the state data associated with a single connection
* to a backend.
*/
struct gtm_conn
{
/* Saved values of connection options */
char *pghost; /* the machine on which the server is running */
char *pghostaddr; /* the IPv4 address of the machine on which
* the server is running, in IPv4
* numbers-and-dots notation. Takes precedence
* over above. */
char *pgport; /* the server's communication port */
char *connect_timeout; /* connection timeout (numeric string) */
char *coordinator_id; /* coordinator id */
int is_proxy; /* is this a connection to/from a proxy ? */
/* Optional file to write trace info to */
FILE *Pfdebug;
/* Status indicators */
ConnStatusType status;
/* Connection data */
int sock; /* Unix FD for socket, -1 if not connected */
SockAddr laddr; /* Local address */
SockAddr raddr; /* Remote address */
/* Transient state needed while establishing connection */
struct addrinfo *addrlist; /* list of possible backend addresses */
struct addrinfo *addr_cur; /* the one currently being tried */
int addrlist_family; /* needed to know how to free addrlist */
/* Buffer for data received from backend and not yet processed */
char *inBuffer; /* currently allocated buffer */
int inBufSize; /* allocated size of buffer */
int inStart; /* offset to first unconsumed data in buffer */
int inCursor; /* next byte to tentatively consume */
int inEnd; /* offset to first position after avail data */
/* Buffer for data not yet sent to backend */
char *outBuffer; /* currently allocated buffer */
int outBufSize; /* allocated size of buffer */
int outCount; /* number of chars waiting in buffer */
/* State for constructing messages in outBuffer */
int outMsgStart; /* offset to msg start (length word); if -1,
* msg has no length word */
int outMsgEnd; /* offset to msg end (so far) */
/* Buffer for current error message */
PQExpBufferData errorMessage; /* expansible string */
/* Buffer for receiving various parts of messages */
PQExpBufferData workBuffer; /* expansible string */
/* Pointer to the result of last operation */
GTM_Result *result;
};
/* === in fe-misc.c === */
/*
* "Get" and "Put" routines return 0 if successful, EOF if not. Note that for
* Get, EOF merely means the buffer is exhausted, not that there is
* necessarily any error.
*/
extern int gtmpqCheckOutBufferSpace(size_t bytes_needed, GTM_Conn *conn);
extern int gtmpqCheckInBufferSpace(size_t bytes_needed, GTM_Conn *conn);
extern int gtmpqGetc(char *result, GTM_Conn *conn);
extern int gtmpqPutc(char c, GTM_Conn *conn);
extern int gtmpqGets(PQExpBuffer buf, GTM_Conn *conn);
extern int gtmpqGets_append(PQExpBuffer buf, GTM_Conn *conn);
extern int gtmpqPuts(const char *s, GTM_Conn *conn);
extern int gtmpqGetnchar(char *s, size_t len, GTM_Conn *conn);
extern int gtmpqPutnchar(const char *s, size_t len, GTM_Conn *conn);
extern int gtmpqGetInt(int *result, size_t bytes, GTM_Conn *conn);
extern int gtmpqPutInt(int value, size_t bytes, GTM_Conn *conn);
extern int gtmpqPutMsgStart(char msg_type, bool force_len, GTM_Conn *conn);
extern int gtmpqPutMsgEnd(GTM_Conn *conn);
extern int gtmpqReadData(GTM_Conn *conn);
extern int gtmpqFlush(GTM_Conn *conn);
extern int gtmpqWait(int forRead, int forWrite, GTM_Conn *conn);
extern int gtmpqWaitTimed(int forRead, int forWrite, GTM_Conn *conn,
time_t finish_time);
extern int gtmpqReadReady(GTM_Conn *conn);
extern int gtmpqWriteReady(GTM_Conn *conn);
/*
* In fe-protocol.c
*/
GTM_Result * GTMPQgetResult(GTM_Conn *conn);
extern int gtmpqGetError(GTM_Conn *conn, GTM_Result *result);
void gtmpqFreeResultData(GTM_Result *result, bool is_proxy);
#define SOCK_ERRNO errno
#define SOCK_ERRNO_SET(e) (errno = (e))
#endif /* LIBPQ_INT_H */
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