rb_w32_sleep      532 include/ruby/win32.h int  rb_w32_sleep(unsigned long msec);
rb_w32_sleep      202 thread_win32.c     BLOCKING_REGION(ret = rb_w32_sleep(msec),
rb_w32_sleep     2156 win32/win32.c  	    rb_w32_sleep(timeout->tv_sec * 1000 + timeout->tv_usec / 1000);
rb_w32_sleep     2158 win32/win32.c  	    rb_w32_sleep(INFINITE);