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- /*-------------------------------------------------------------------------
- *
- * session.h
- * Encapsulation of user session.
- *
- * Copyright (c) 2017-2019, PostgreSQL Global Development Group
- *
- * src/include/access/session.h
- *
- *-------------------------------------------------------------------------
- */
- #ifndef SESSION_H
- #define SESSION_H
-
- #include "lib/dshash.h"
-
- /* Avoid including typcache.h */
- struct SharedRecordTypmodRegistry;
-
- /*
- * A struct encapsulating some elements of a user's session. For now this
- * manages state that applies to parallel query, but in principle it could
- * include other things that are currently global variables.
- */
- typedef struct Session
- {
- dsm_segment *segment; /* The session-scoped DSM segment. */
- dsa_area *area; /* The session-scoped DSA area. */
-
- /* State managed by typcache.c. */
- struct SharedRecordTypmodRegistry *shared_typmod_registry;
- dshash_table *shared_record_table;
- dshash_table *shared_typmod_table;
- } Session;
-
- extern void InitializeSession(void);
- extern dsm_handle GetSessionDsmHandle(void);
- extern void AttachSession(dsm_handle handle);
- extern void DetachSession(void);
-
- /* The current session, or NULL for none. */
- extern Session *CurrentSession;
-
- #endif /* SESSION_H */
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