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611806cd72
Since C99, there can be a trailing comma after the last value in an enum definition. A lot of new code has been introducing this style on the fly. Some new patches are now taking an inconsistent approach to this. Some add the last comma on the fly if they add a new last value, some are trying to preserve the existing style in each place, some are even dropping the last comma if there was one. We could nudge this all in a consistent direction if we just add the trailing commas everywhere once. I omitted a few places where there was a fixed "last" value that will always stay last. I also skipped the header files of libpq and ecpg, in case people want to use those with older compilers. There were also a small number of cases where the enum type wasn't used anywhere (but the enum values were), which ended up confusing pgindent a bit, so I left those alone. Discussion: https://www.postgresql.org/message-id/flat/386f8c45-c8ac-4681-8add-e3b0852c1620%40eisentraut.org
66 lines
2 KiB
C
66 lines
2 KiB
C
/*-------------------------------------------------------------------------
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*
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* sync.h
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* File synchronization management code.
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*
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* Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/storage/sync.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef SYNC_H
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#define SYNC_H
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#include "storage/relfilelocator.h"
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/*
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* Type of sync request. These are used to manage the set of pending
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* requests to call a sync handler's sync or unlink functions at the next
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* checkpoint.
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*/
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typedef enum SyncRequestType
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{
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SYNC_REQUEST, /* schedule a call of sync function */
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SYNC_UNLINK_REQUEST, /* schedule a call of unlink function */
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SYNC_FORGET_REQUEST, /* forget all calls for a tag */
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SYNC_FILTER_REQUEST, /* forget all calls satisfying match fn */
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} SyncRequestType;
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/*
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* Which set of functions to use to handle a given request. The values of
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* the enumerators must match the indexes of the function table in sync.c.
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*/
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typedef enum SyncRequestHandler
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{
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SYNC_HANDLER_MD = 0,
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SYNC_HANDLER_CLOG,
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SYNC_HANDLER_COMMIT_TS,
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SYNC_HANDLER_MULTIXACT_OFFSET,
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SYNC_HANDLER_MULTIXACT_MEMBER,
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SYNC_HANDLER_NONE,
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} SyncRequestHandler;
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/*
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* A tag identifying a file. Currently it has the members required for md.c's
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* usage, but sync.c has no knowledge of the internal structure, and it is
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* liable to change as required by future handlers.
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*/
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typedef struct FileTag
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{
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int16 handler; /* SyncRequestHandler value, saving space */
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int16 forknum; /* ForkNumber, saving space */
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RelFileLocator rlocator;
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uint32 segno;
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} FileTag;
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extern void InitSync(void);
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extern void SyncPreCheckpoint(void);
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extern void SyncPostCheckpoint(void);
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extern void ProcessSyncRequests(void);
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extern void RememberSyncRequest(const FileTag *ftag, SyncRequestType type);
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extern bool RegisterSyncRequest(const FileTag *ftag, SyncRequestType type,
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bool retryOnError);
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#endif /* SYNC_H */
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