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Diffstat (limited to '')
-rw-r--r-- | src/include/access/session.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/include/access/session.h b/src/include/access/session.h new file mode 100644 index 0000000..4c1f6ff --- /dev/null +++ b/src/include/access/session.h @@ -0,0 +1,44 @@ +/*------------------------------------------------------------------------- + * + * session.h + * Encapsulation of user session. + * + * Copyright (c) 2017-2020, 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 */ |