实现中大量使用多层次嵌套预编译,大量if else,wrapper等
不建议去看这个实现
start_mutex_wait_v1
if (flag_thread_instrumentation)
#ifdef HAVE_PSI_STATEMENT_INTERFACE #define MYSQL_SET_STATEMENT_ROWS_SENT(LOCKER, P1) inline_mysql_set_statement_rows_sent(LOCKER, P1) #else #define MYSQL_SET_STATEMENT_ROWS_SENT(LOCKER, P1) do {} while (0) #endif