granicus.if.org Git - postgresql/blob - src/include/storage/procarray.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * procarray.h
   4  *        POSTGRES process array definitions.
   5  *
   6  *
   7  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
   8  * Portions Copyright (c) 1994, Regents of the University of California
   9  *
  10  * src/include/storage/procarray.h
  11  *
  12  *-------------------------------------------------------------------------
  13  */
  14 #ifndef PROCARRAY_H
  15 #define PROCARRAY_H
  16
  17 #include "storage/lock.h"
  18 #include "storage/procsignal.h"
  19 #include "storage/standby.h"
  20 #include "utils/snapshot.h"
  21
  22
  23 extern Size ProcArrayShmemSize(void);
  24 extern void CreateSharedProcArray(void);
  25 extern void ProcArrayAdd(PGPROC *proc);
  26 extern void ProcArrayRemove(PGPROC *proc, TransactionId latestXid);
  27
  28 extern void ProcArrayEndTransaction(PGPROC *proc, TransactionId latestXid);
  29 extern void ProcArrayClearTransaction(PGPROC *proc);
  30
  31 extern void ProcArrayInitRecoveryInfo(TransactionId oldestActiveXid);
  32 extern void ProcArrayApplyRecoveryInfo(RunningTransactions running);
  33 extern void ProcArrayApplyXidAssignment(TransactionId topxid,
  34                                                         int nsubxids, TransactionId *subxids);
  35
  36 extern void RecordKnownAssignedTransactionIds(TransactionId xid);
  37 extern void ExpireTreeKnownAssignedTransactionIds(TransactionId xid,
  38                                                                           int nsubxids, TransactionId *subxids,
  39                                                                           TransactionId max_xid);
  40 extern void ExpireAllKnownAssignedTransactionIds(void);
  41 extern void ExpireOldKnownAssignedTransactionIds(TransactionId xid);
  42
  43 extern RunningTransactions GetRunningTransactionData(void);
  44
  45 extern Snapshot GetSnapshotData(Snapshot snapshot);
  46
  47 extern bool TransactionIdIsInProgress(TransactionId xid);
  48 extern bool TransactionIdIsActive(TransactionId xid);
  49 extern TransactionId GetOldestXmin(bool allDbs, bool ignoreVacuum);
  50
  51 extern int      GetTransactionsInCommit(TransactionId **xids_p);
  52 extern bool HaveTransactionsInCommit(TransactionId *xids, int nxids);
  53
  54 extern PGPROC *BackendPidGetProc(int pid);
  55 extern int      BackendXidGetPid(TransactionId xid);
  56 extern bool IsBackendPid(int pid);
  57
  58 extern VirtualTransactionId *GetCurrentVirtualXIDs(TransactionId limitXmin,
  59                                           bool excludeXmin0, bool allDbs, int excludeVacuum,
  60                                           int *nvxids);
  61 extern VirtualTransactionId *GetConflictingVirtualXIDs(TransactionId limitXmin, Oid dbOid);
  62 extern pid_t CancelVirtualTransaction(VirtualTransactionId vxid, ProcSignalReason sigmode);
  63
  64 extern int      CountActiveBackends(void);
  65 extern int      CountDBBackends(Oid databaseid);
  66 extern void CancelDBBackends(Oid databaseid, ProcSignalReason sigmode, bool conflictPending);
  67 extern int      CountUserBackends(Oid roleid);
  68 extern bool CountOtherDBBackends(Oid databaseId,
  69                                          int *nbackends, int *nprepared);
  70
  71 extern void XidCacheRemoveRunningXids(TransactionId xid,
  72                                                   int nxids, const TransactionId *xids,
  73                                                   TransactionId latestXid);
  74
  75 #endif   /* PROCARRAY_H */