func: void pgstat_send_bgwriter() static const PgStat_MsgBgWriter all_zeroes ; if ( memcmp ( ( & BgWriterStats ) , ( & all_zeroes ) , sizeof ( PgStat_MsgBgWriter ) ) == 0 )  pgstat_send ( ( & BgWriterStats ) , ( sizeof ( BgWriterStats ) ) ); static void pgstat_send(void *msg,int len) int rc ; if ( pgStatSock == - 1 )  ( ( PgStat_MsgHdr * ) msg ) -> m_size = len; rc = ( send ( pgStatSock , msg , len , 0 ) ); while ( rc < 0 && * __errno_location ( ) == 4 )  