45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
/*-------------------------------------------------------------------------
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*
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* session.h
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* Encapsulation of user session.
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*
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* Copyright (c) 2017-2020, PostgreSQL Global Development Group
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*
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* src/include/access/session.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef SESSION_H
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#define SESSION_H
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#include "lib/dshash.h"
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/* Avoid including typcache.h */
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struct SharedRecordTypmodRegistry;
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/*
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* A struct encapsulating some elements of a user's session. For now this
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* manages state that applies to parallel query, but in principle it could
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* include other things that are currently global variables.
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*/
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typedef struct Session
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{
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dsm_segment *segment; /* The session-scoped DSM segment. */
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dsa_area *area; /* The session-scoped DSA area. */
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/* State managed by typcache.c. */
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struct SharedRecordTypmodRegistry *shared_typmod_registry;
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dshash_table *shared_record_table;
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dshash_table *shared_typmod_table;
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} Session;
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extern void InitializeSession(void);
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extern dsm_handle GetSessionDsmHandle(void);
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extern void AttachSession(dsm_handle handle);
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extern void DetachSession(void);
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/* The current session, or NULL for none. */
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extern Session *CurrentSession;
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#endif /* SESSION_H */
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