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SQLITE3_AUTO_EXTENSION(3)  Library Functions Manual  SQLITE3_AUTO_EXTENSION(3)

NAME
     sqlite3_auto_extension - Automatically Load Statically Linked Extensions

SYNOPSIS
     int
     sqlite3_auto_extension(void(*xEntryPoint)(void));

DESCRIPTION
     This interface causes the xEntryPoint() function to be invoked for each
     new database connection that is created.  The idea here is that
     xEntryPoint() is the entry point for a statically linked SQLite extension
     that is to be automatically loaded into all new database connections.

     Even though the function prototype shows that xEntryPoint() takes no
     arguments and returns void, SQLite invokes xEntryPoint() with three
     arguments and expects an integer result as if the signature of the entry
     point where as follows:


        int xEntryPoint(      sqlite3 *db,      const char **pzErrMsg,
     const struct sqlite3_api_routines *pThunk    );


     If the xEntryPoint routine encounters an error, it should make *pzErrMsg
     point to an appropriate error message (obtained from sqlite3_mprintf())
     and return an appropriate error code.  SQLite ensures that *pzErrMsg is
     NULL before calling the xEntryPoint().  SQLite will invoke sqlite3_free()
     on *pzErrMsg after xEntryPoint() returns.  If any xEntryPoint() returns
     an error, the sqlite3_open(), sqlite3_open16(), or sqlite3_open_v2() call
     that provoked the xEntryPoint() will fail.

     Calling sqlite3_auto_extension(X) with an entry point X that is already
     on the list of automatic extensions is a harmless no-op.  No entry point
     will be called more than once for each database connection that is
     opened.

SEE ALSO
     sqlite3(3), sqlite3_cancel_auto_extension(3), sqlite3_malloc(3),
     sqlite3_mprintf(3), sqlite3_open(3), sqlite3_reset_auto_extension(3)

NetBSD 8.0                      March 11, 2017                      NetBSD 8.0