/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #include <u.h>#include <libc.h>#include <thread.h>#include "threadimpl.h" longiocall(Ioproc *io, long (*op)(va_list*), ...){	int ret, inted;	Ioproc *msg; 	if(send(io->c, &io) == -1){		werrstr("interrupted");		return -1;	}	assert(!io->inuse);	io->inuse = 1;	io->op = op;	va_start(io->arg, op);	msg = io;	inted = 0;	while(send(io->creply, &msg) == -1){		msg = nil;		inted = 1;	}	if(inted){		werrstr("interrupted");		return -1;	} 	/*	 * If we get interrupted, we have to stick around so that	 * the IO proc has someone to talk to.  Send it an interrupt	 * and try again.	 */	inted = 0;	while(recv(io->creply, nil) == -1){		inted = 1;		iointerrupt(io);	}	USED(inted);	va_end(io->arg);	ret = io->ret;	if(ret < 0)		errstr(io->err, sizeof io->err);	io->inuse = 0; 	/* release resources */	while(send(io->creply, &io) == -1)		;	return ret;}