51.1. Initialization Functions

51.1. Initialization Functions
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51.1. Initialization Functions #

+ An archive library is loaded by dynamically loading a shared library with the + archive_library's name as the library base name. The + normal library search path is used to locate the library. To provide the + required archive module callbacks and to indicate that the library is + actually an archive module, it needs to provide a function named + _PG_archive_module_init. The result of the function + must be a pointer to a struct of type + ArchiveModuleCallbacks, which contains everything + that the core code needs to know to make use of the archive module. The + return value needs to be of server lifetime, which is typically achieved by + defining it as a static const variable in global scope. + +

+typedef struct ArchiveModuleCallbacks
+{
+    ArchiveStartupCB startup_cb;
+    ArchiveCheckConfiguredCB check_configured_cb;
+    ArchiveFileCB archive_file_cb;
+    ArchiveShutdownCB shutdown_cb;
+} ArchiveModuleCallbacks;
+typedef const ArchiveModuleCallbacks *(*ArchiveModuleInit) (void);
+

+ + Only the archive_file_cb callback is required. The + others are optional. +