codekingpro/portable-devtools

1/*-------------------------------------------------------------------------2 *3 * session.h4 *	  Encapsulation of user session.5 *6 * Copyright (c) 2017-2023, PostgreSQL Global Development Group7 *8 * src/include/access/session.h9 *10 *-------------------------------------------------------------------------11 */12#ifndef SESSION_H13#define SESSION_H14 15#include "lib/dshash.h"16 17/* Avoid including typcache.h */18struct SharedRecordTypmodRegistry;19 20/*21 * A struct encapsulating some elements of a user's session.  For now this22 * manages state that applies to parallel query, but in principle it could23 * include other things that are currently global variables.24 */25typedef struct Session26{27	dsm_segment *segment;		/* The session-scoped DSM segment. */28	dsa_area   *area;			/* The session-scoped DSA area. */29 30	/* State managed by typcache.c. */31	struct SharedRecordTypmodRegistry *shared_typmod_registry;32	dshash_table *shared_record_table;33	dshash_table *shared_typmod_table;34} Session;35 36extern void InitializeSession(void);37extern dsm_handle GetSessionDsmHandle(void);38extern void AttachSession(dsm_handle handle);39extern void DetachSession(void);40 41/* The current session, or NULL for none. */42extern PGDLLIMPORT Session *CurrentSession;43 44#endif							/* SESSION_H */45