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pool_process_context.h
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pool_process_context.h
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/* -*-pgsql-c-*- */
/*
*
* $Header$
*
* pgpool: a language independent connection pool server for PostgreSQL
* written by Tatsuo Ishii
*
* Copyright (c) 2003-2010 PgPool Global Development Group
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby
* granted, provided that the above copyright notice appear in all
* copies and that both that copyright notice and this permission
* notice appear in supporting documentation, and that the name of the
* author not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. The author makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* pool_process_context.h.: process context information
*
*/
#ifndef POOL_PROCESS_CONTEXT_H
#define POOL_PROCESS_CONTEXT_H
#include "pool.h"
/*
* Child process context:
* Manages per pgpool child process context
*/
typedef struct {
/*
* process start time, info on connection to backend etc.
*/
ProcessInfo *process_info;
int proc_id; /* Index to process table(ProcessInfo) (!= UNIX's PID) */
/*
* PostgreSQL server description. Placed on shared memory.
* Includes backend up/down info, hostname, data directory etc.
*/
BackendDesc *backend_desc;
int local_session_id; /* local session id */
} POOL_PROCESS_CONTEXT;
extern void pool_init_process_context(void);
extern POOL_PROCESS_CONTEXT *pool_get_process_context(void);
extern ProcessInfo *pool_get_my_process_info(void);
extern void pool_incremnet_local_session_id(void);
extern int pool_coninfo_size(void);
extern int pool_coninfo_num(void);
extern ConnectionInfo *pool_coninfo(int child, int connection_pool, int backend);
extern ConnectionInfo *pool_coninfo_pid(int pid, int connection_pool, int backend);
extern void pool_coninfo_set_frontend_connected(int proc_id, int pool_index);
extern void pool_coninfo_unset_frontend_connected(int proc_id, int pool_index);
#endif /* POOL_PROCESS_CONTEXT_H */