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Add transaction-level advisory locks.

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They share the same locking namespace with the existing session-level
advisory locks, but they are automatically released at the end of the
current transaction and cannot be released explicitly via unlock
functions.

Marko Tiikkaja, reviewed by me.
This commit is contained in:
Itagaki Takahiro
2011-02-18 14:04:34 +09:00
parent 87bb2ade2c
commit 62c7bd31c8
14 changed files with 814 additions and 71 deletions
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8
src/include/utils/builtins.h
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@ -995,15 +995,23 @@ extern Datum show_all_settings(PG_FUNCTION_ARGS);
/* lockfuncs.c */
extern Datum pg_lock_status(PG_FUNCTION_ARGS);
extern Datum pg_advisory_lock_int8(PG_FUNCTION_ARGS);
extern Datum pg_advisory_xact_lock_int8(PG_FUNCTION_ARGS);
extern Datum pg_advisory_lock_shared_int8(PG_FUNCTION_ARGS);
extern Datum pg_advisory_xact_lock_shared_int8(PG_FUNCTION_ARGS);
extern Datum pg_try_advisory_lock_int8(PG_FUNCTION_ARGS);
extern Datum pg_try_advisory_xact_lock_int8(PG_FUNCTION_ARGS);
extern Datum pg_try_advisory_lock_shared_int8(PG_FUNCTION_ARGS);
extern Datum pg_try_advisory_xact_lock_shared_int8(PG_FUNCTION_ARGS);
extern Datum pg_advisory_unlock_int8(PG_FUNCTION_ARGS);
extern Datum pg_advisory_unlock_shared_int8(PG_FUNCTION_ARGS);
extern Datum pg_advisory_lock_int4(PG_FUNCTION_ARGS);
extern Datum pg_advisory_xact_lock_int4(PG_FUNCTION_ARGS);
extern Datum pg_advisory_lock_shared_int4(PG_FUNCTION_ARGS);
extern Datum pg_advisory_xact_lock_shared_int4(PG_FUNCTION_ARGS);
extern Datum pg_try_advisory_lock_int4(PG_FUNCTION_ARGS);
extern Datum pg_try_advisory_xact_lock_int4(PG_FUNCTION_ARGS);
extern Datum pg_try_advisory_lock_shared_int4(PG_FUNCTION_ARGS);
extern Datum pg_try_advisory_xact_lock_shared_int4(PG_FUNCTION_ARGS);
extern Datum pg_advisory_unlock_int4(PG_FUNCTION_ARGS);
extern Datum pg_advisory_unlock_shared_int4(PG_FUNCTION_ARGS);
extern Datum pg_advisory_unlock_all(PG_FUNCTION_ARGS);