rb_w32_Sleep      140 include/ruby/win32.h #define sleep(x)		rb_w32_Sleep((x)*1000)
rb_w32_Sleep      141 include/ruby/win32.h #define Sleep(msec)		(void)rb_w32_Sleep(msec)
rb_w32_Sleep      542 include/ruby/win32.h int  WINAPI rb_w32_Sleep(unsigned long msec);