/*-------------------------------------------------------------------------
*
* archive_module . h
* Exports for archive modules .
*
* Copyright ( c ) 2022 - 2025 , PostgreSQL Global Development Group
*
* src / include / archive / archive_module . h
*
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
#ifndef _ARCHIVE_MODULE_H
#define _ARCHIVE_MODULE_H
/*
* The value of the archive_library GUC .
*/
extern PGDLLIMPORT char *XLogArchiveLibrary;
typedef struct ArchiveModuleState
{
/*
* Private data pointer for use by an archive module . This can be used to
* store state for the module that will be passed to each of its
* callbacks .
*/
void *private_data;
} ArchiveModuleState;
/*
* Archive module callbacks
*
* These callback functions should be defined by archive libraries and returned
* via _ PG_archive_module_init ( ) . ArchiveFileCB is the only required callback .
* For more information about the purpose of each callback , refer to the
* archive modules documentation .
*/
typedef void (*ArchiveStartupCB) (ArchiveModuleState *state);
typedef bool (*ArchiveCheckConfiguredCB) (ArchiveModuleState *state);
typedef bool (*ArchiveFileCB) (ArchiveModuleState *state, const char *file, const char *path);
typedef void (*ArchiveShutdownCB) (ArchiveModuleState *state);
typedef struct ArchiveModuleCallbacks
{
ArchiveStartupCB startup_cb;
ArchiveCheckConfiguredCB check_configured_cb;
ArchiveFileCB archive_file_cb;
ArchiveShutdownCB shutdown_cb;
} ArchiveModuleCallbacks;
/*
* Type of the shared library symbol _ PG_archive_module_init that is looked
* up when loading an archive library .
*/
typedef const ArchiveModuleCallbacks *(*ArchiveModuleInit) (void );
extern PGDLLEXPORT const ArchiveModuleCallbacks *_PG_archive_module_init(void );
/* Support for messages reported from archive module callbacks. */
extern PGDLLIMPORT char *arch_module_check_errdetail_string;
#define arch_module_check_errdetail \
pre_format_elog_string(errno, TEXTDOMAIN), \
arch_module_check_errdetail_string = format_elog_string
#endif /* _ARCHIVE_MODULE_H */
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