diff options
| author | Bruce Momjian <bruce@momjian.us> | 2001-02-23 19:24:06 +0000 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2001-02-23 19:24:06 +0000 |
| commit | a37666c2ec24db97d4f7cf30a24653608f7ff487 (patch) | |
| tree | 731e67d865252c0d6144004a1b80f51951d89a3d /src | |
| parent | 817646515015c74160606d29ac5d945a37af0aca (diff) | |
| download | postgresql-a37666c2ec24db97d4f7cf30a24653608f7ff487.tar.gz | |
Update comments on locks.
Diffstat (limited to 'src')
| -rw-r--r-- | src/include/storage/lock.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/include/storage/lock.h b/src/include/storage/lock.h index 653ca9936a..af07e88935 100644 --- a/src/include/storage/lock.h +++ b/src/include/storage/lock.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: lock.h,v 1.46 2001/02/23 18:28:46 momjian Exp $ + * $Id: lock.h,v 1.47 2001/02/23 19:24:06 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -76,6 +76,14 @@ typedef int LOCKMETHOD; #define USER_LOCKMETHOD 2 #define MIN_LOCKMETHOD DEFAULT_LOCKMETHOD +/* There is normally only one lock method, the default one. + * If user locks are enabled, an additional lock method is present + * + * LOCKMETHODCTL and LOCKMETHODTABLE are split because the first lives + * in shared memory. This is because it contains a spinlock. + * LOCKMETHODTABLE exists in private memory. Both are created by the + * postmaster and should be the same in all backends + */ /* * This is the control structure for a lock table. It |