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46 lines
1.4 KiB
46 lines
1.4 KiB
9 years ago
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/*-------------------------------------------------------------------------
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*
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* walmethods.h
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*
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* Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* src/bin/pg_basebackup/walmethods.h
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*-------------------------------------------------------------------------
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*/
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typedef void *Walfile;
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typedef enum
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{
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CLOSE_NORMAL,
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CLOSE_UNLINK,
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CLOSE_NO_RENAME,
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} WalCloseMethod;
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typedef struct WalWriteMethod WalWriteMethod;
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struct WalWriteMethod
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{
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Walfile(*open_for_write) (const char *pathname, const char *temp_suffix, size_t pad_to_size);
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int (*close) (Walfile f, WalCloseMethod method);
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bool (*existsfile) (const char *pathname);
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ssize_t (*get_file_size) (const char *pathname);
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ssize_t (*write) (Walfile f, const void *buf, size_t count);
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off_t (*get_current_pos) (Walfile f);
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int (*fsync) (Walfile f);
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bool (*finish) (void);
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char *(*getlasterror) (void);
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};
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/*
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* Available WAL methods:
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* - WalDirectoryMethod - write WAL to regular files in a standard pg_xlog
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* - TarDirectoryMethod - write WAL to a tarfile corresponding to pg_xlog
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* (only implements the methods required for pg_basebackup,
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* not all those required for pg_receivexlog)
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*/
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WalWriteMethod *CreateWalDirectoryMethod(const char *basedir, bool sync);
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WalWriteMethod *CreateWalTarMethod(const char *tarbase, int compression, bool sync);
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