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/*------------------------------------------------------------------------- * * sinvaladt.h * POSTGRES shared cache invalidation data manager. * * The shared cache invalidation manager is responsible for transmitting * invalidation messages between backends. Any message sent by any backend * must be delivered to all already-running backends before it can be * forgotten. (If we run out of space, we instead deliver a "RESET" * message to backends that have fallen too far behind.) * * The struct type SharedInvalidationMessage, defining the contents of * a single message, is defined in sinval.h. * * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * src/include/storage/sinvaladt.h * *------------------------------------------------------------------------- */ #ifndef SINVALADT_H #define SINVALADT_H #include "storage/lock.h" #include "storage/sinval.h" /* * prototypes for functions in sinvaladt.c */ extern Size SInvalShmemSize(void); extern void CreateSharedInvalidationState(void); extern void SharedInvalBackendInit(bool sendOnly); extern PGPROC *BackendIdGetProc(int backendID); extern void BackendIdGetTransactionIds(int backendID, TransactionId *xid, TransactionId *xmin); extern void SIInsertDataEntries(const SharedInvalidationMessage *data, int n); extern int SIGetDataEntries(SharedInvalidationMessage *data, int datasize); extern void SICleanupQueue(bool callerHasWriteLock, int minFree); extern LocalTransactionId GetNextLocalTransactionId(void); #endif /* SINVALADT_H */