表示没有这样用过#define
请问这样写的目的是什么呢？
#define sys_init()
#define sys_timeout(m,h,a)
#define sys_untimeout(m,a)
#define sys_sem_new(c) c
#define sys_sem_signal(s)
#define sys_sem_wait(s)
#define sys_sem_wait_timeout(s,t)
#define sys_arch_sem_wait(s,t)
#define sys_sem_free(s)
#define sys_mbox_new(s) 0
#define sys_mbox_fetch(m,d)
#define sys_mbox_tryfetch(m,d)
#define sys_mbox_post(m,d)
#define sys_mbox_trypost(m,d)
#define sys_mbox_free(m)
#define sys_thread_new(n,t,a,s,p) |
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