static void uartclose(Chan *c) { Uart *p; if(c->qid.type & QTDIR) return; if((c->flag & COPEN) == 0) return; switch(NETTYPE(c->qid.path)){ case Ndataqid: case Nctlqid: p = uart[NETID(c->qid.path)]; qlock(p); if(--(p->opens) == 0){ qclose(p->iq); ilock(&p->rlock); p->ir = p->iw = p->istage; iunlock(&p->rlock); /* */ qhangup(p->oq, nil); if(!waserror()){ uartdrainoutput(p); poperror(); } qclose(p->oq); uartdisable(p); p->dcd = p->dsr = p->dohup = 0; } qunlock(p); break; } }
static void uartclose(Chan *c) { Uart *p; if(c->qid.type & QTDIR) return; if((c->flag & COPEN) == 0) return; switch(NETTYPE(c->qid.path)){ case Ndataqid: case Nctlqid: p = uart[NETID(c->qid.path)]; qlock(p); if(--(p->opens) == 0){ uartdisable(p); qclose(p->iq); qclose(p->oq); p->ip = p->istage; } qunlock(p); break; } }