src/include/storage/lwlocklist.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * lwlocklist.h
   4  *
   5  * The predefined LWLock list is kept in its own source file for use by
   6  * automatic tools.  The exact representation of a keyword is determined by
   7  * the PG_LWLOCK macro, which is not defined in this file; it can be
   8  * defined by the caller for special purposes.
   9  *
  10  * Also, generate-lwlocknames.pl processes this file to create lwlocknames.h.
  11  *
  12  * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
  13  * Portions Copyright (c) 1994, Regents of the University of California
  14  *
  15  * IDENTIFICATION
  16  *    src/include/storage/lwlocklist.h
  17  *
  18  *-------------------------------------------------------------------------
  19  */
  20
  21 /*
  22  * Some commonly-used locks have predefined positions within MainLWLockArray;
  23  * these are defined here.  If you add a lock, add it to the end to avoid
  24  * renumbering the existing locks; if you remove a lock, consider leaving a gap
  25  * in the numbering sequence for the benefit of DTrace and other external
  26  * debugging scripts.  Also, do not forget to update the section
  27  * WaitEventLWLock of src/backend/utils/activity/wait_event_names.txt.
  28  *
  29  * Note that the names here don't include the Lock suffix, to appease the
  30  * C preprocessor; it's added elsewhere.
  31  */
  32
  33 /* 0 is available; was formerly BufFreelistLock */
  34 PG_LWLOCK(1, ShmemIndex)
  35 PG_LWLOCK(2, OidGen)
  36 PG_LWLOCK(3, XidGen)
  37 PG_LWLOCK(4, ProcArray)
  38 PG_LWLOCK(5, SInvalRead)
  39 PG_LWLOCK(6, SInvalWrite)
  40 PG_LWLOCK(7, WALBufMapping)
  41 PG_LWLOCK(8, WALWrite)
  42 PG_LWLOCK(9, ControlFile)
  43 /* 10 was CheckpointLock */
  44 /* 11 was XactSLRULock */
  45 /* 12 was SubtransSLRULock */
  46 PG_LWLOCK(13, MultiXactGen)
  47 /* 14 was MultiXactOffsetSLRULock */
  48 /* 15 was MultiXactMemberSLRULock */
  49 PG_LWLOCK(16, RelCacheInit)
  50 PG_LWLOCK(17, CheckpointerComm)
  51 PG_LWLOCK(18, TwoPhaseState)
  52 PG_LWLOCK(19, TablespaceCreate)
  53 PG_LWLOCK(20, BtreeVacuum)
  54 PG_LWLOCK(21, AddinShmemInit)
  55 PG_LWLOCK(22, Autovacuum)
  56 PG_LWLOCK(23, AutovacuumSchedule)
  57 PG_LWLOCK(24, SyncScan)
  58 PG_LWLOCK(25, RelationMapping)
  59 /* 26 was NotifySLRULock */
  60 PG_LWLOCK(27, NotifyQueue)
  61 PG_LWLOCK(28, SerializableXactHash)
  62 PG_LWLOCK(29, SerializableFinishedList)
  63 PG_LWLOCK(30, SerializablePredicateList)
  64 /* 31 was SerialSLRULock */
  65 PG_LWLOCK(32, SyncRep)
  66 PG_LWLOCK(33, BackgroundWorker)
  67 PG_LWLOCK(34, DynamicSharedMemoryControl)
  68 PG_LWLOCK(35, AutoFile)
  69 PG_LWLOCK(36, ReplicationSlotAllocation)
  70 PG_LWLOCK(37, ReplicationSlotControl)
  71 /* 38 was CommitTsSLRULock */
  72 PG_LWLOCK(39, CommitTs)
  73 PG_LWLOCK(40, ReplicationOrigin)
  74 PG_LWLOCK(41, MultiXactTruncation)
  75 /* 42 was OldSnapshotTimeMapLock */
  76 PG_LWLOCK(43, LogicalRepWorker)
  77 PG_LWLOCK(44, XactTruncation)
  78 /* 45 was XactTruncationLock until removal of BackendRandomLock */
  79 PG_LWLOCK(46, WrapLimitsVacuum)
  80 PG_LWLOCK(47, NotifyQueueTail)
  81 PG_LWLOCK(48, WaitEventCustom)
  82 PG_LWLOCK(49, WALSummarizer)
  83 PG_LWLOCK(50, DSMRegistry)
  84 PG_LWLOCK(51, InjectionPoint)
  85 PG_LWLOCK(52, SerialControl)