PostgreSQL Source Code: src/include/storage/procarray.h Source File

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00001 /*-------------------------------------------------------------------------
00002  *
00003  * procarray.h
00004  *    POSTGRES process array definitions.
00005  *
00006  *
00007  * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
00008  * Portions Copyright (c) 1994, Regents of the University of California
00009  *
00010  * src/include/storage/procarray.h
00011  *
00012  *-------------------------------------------------------------------------
00013  */
00014 #ifndef PROCARRAY_H
00015 #define PROCARRAY_H
00016 
00017 #include "storage/standby.h"
00018 #include "utils/snapshot.h"
00019 
00020 
00021 extern Size ProcArrayShmemSize(void);
00022 extern void CreateSharedProcArray(void);
00023 extern void ProcArrayAdd(PGPROC *proc);
00024 extern void ProcArrayRemove(PGPROC *proc, TransactionId latestXid);
00025 
00026 extern void ProcArrayEndTransaction(PGPROC *proc, TransactionId latestXid);
00027 extern void ProcArrayClearTransaction(PGPROC *proc);
00028 
00029 extern void ProcArrayApplyRecoveryInfo(RunningTransactions running);
00030 extern void ProcArrayApplyXidAssignment(TransactionId topxid,
00031                             int nsubxids, TransactionId *subxids);
00032 
00033 extern void RecordKnownAssignedTransactionIds(TransactionId xid);
00034 extern void ExpireTreeKnownAssignedTransactionIds(TransactionId xid,
00035                                       int nsubxids, TransactionId *subxids,
00036                                       TransactionId max_xid);
00037 extern void ExpireAllKnownAssignedTransactionIds(void);
00038 extern void ExpireOldKnownAssignedTransactionIds(TransactionId xid);
00039 
00040 extern int  GetMaxSnapshotXidCount(void);
00041 extern int  GetMaxSnapshotSubxidCount(void);
00042 
00043 extern Snapshot GetSnapshotData(Snapshot snapshot);
00044 
00045 extern bool ProcArrayInstallImportedXmin(TransactionId xmin,
00046                              TransactionId sourcexid);
00047 
00048 extern RunningTransactions GetRunningTransactionData(void);
00049 
00050 extern bool TransactionIdIsInProgress(TransactionId xid);
00051 extern bool TransactionIdIsActive(TransactionId xid);
00052 extern TransactionId GetOldestXmin(bool allDbs, bool ignoreVacuum);
00053 extern TransactionId GetOldestActiveTransactionId(void);
00054 
00055 extern VirtualTransactionId *GetVirtualXIDsDelayingChkpt(int *nvxids);
00056 extern bool HaveVirtualXIDsDelayingChkpt(VirtualTransactionId *vxids, int nvxids);
00057 
00058 extern PGPROC *BackendPidGetProc(int pid);
00059 extern int  BackendXidGetPid(TransactionId xid);
00060 extern bool IsBackendPid(int pid);
00061 
00062 extern VirtualTransactionId *GetCurrentVirtualXIDs(TransactionId limitXmin,
00063                       bool excludeXmin0, bool allDbs, int excludeVacuum,
00064                       int *nvxids);
00065 extern VirtualTransactionId *GetConflictingVirtualXIDs(TransactionId limitXmin, Oid dbOid);
00066 extern pid_t CancelVirtualTransaction(VirtualTransactionId vxid, ProcSignalReason sigmode);
00067 
00068 extern bool MinimumActiveBackends(int min);
00069 extern int  CountDBBackends(Oid databaseid);
00070 extern void CancelDBBackends(Oid databaseid, ProcSignalReason sigmode, bool conflictPending);
00071 extern int  CountUserBackends(Oid roleid);
00072 extern bool CountOtherDBBackends(Oid databaseId,
00073                      int *nbackends, int *nprepared);
00074 
00075 extern void XidCacheRemoveRunningXids(TransactionId xid,
00076                           int nxids, const TransactionId *xids,
00077                           TransactionId latestXid);
00078 
00079 #endif   /* PROCARRAY_H */
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procarray.h
