1 76193d7c 2003-09-30 devnull #include "threadimpl.h"
 2 76193d7c 2003-09-30 devnull 
 3 76193d7c 2003-09-30 devnull long
 4 76193d7c 2003-09-30 devnull iocall(Ioproc *io, long (*op)(va_list*), ...)
 5 76193d7c 2003-09-30 devnull {
 6 76193d7c 2003-09-30 devnull 	int ret, inted;
 7 76193d7c 2003-09-30 devnull 	Ioproc *msg;
 8 76193d7c 2003-09-30 devnull 
 9 76193d7c 2003-09-30 devnull 	if(send(io->c, &io) == -1){
10 76193d7c 2003-09-30 devnull 		werrstr("interrupted");
11 76193d7c 2003-09-30 devnull 		return -1;
12 76193d7c 2003-09-30 devnull 	}
13 76193d7c 2003-09-30 devnull 	assert(!io->inuse);
14 76193d7c 2003-09-30 devnull 	io->inuse = 1;
15 76193d7c 2003-09-30 devnull 	io->op = op;
16 76193d7c 2003-09-30 devnull 	va_start(io->arg, op);
17 76193d7c 2003-09-30 devnull 	msg = io;
18 76193d7c 2003-09-30 devnull 	inted = 0;
19 76193d7c 2003-09-30 devnull 	while(send(io->creply, &msg) == -1){
20 76193d7c 2003-09-30 devnull 		msg = nil;
21 76193d7c 2003-09-30 devnull 		inted = 1;
22 76193d7c 2003-09-30 devnull 	}
23 76193d7c 2003-09-30 devnull 	if(inted){
24 76193d7c 2003-09-30 devnull 		werrstr("interrupted");
25 76193d7c 2003-09-30 devnull 		return -1;
26 76193d7c 2003-09-30 devnull 	}
27 76193d7c 2003-09-30 devnull 
28 76193d7c 2003-09-30 devnull 	/*
29 76193d7c 2003-09-30 devnull 	 * If we get interrupted, we have stick around so that
30 76193d7c 2003-09-30 devnull 	 * the IO proc has someone to talk to.  Send it an interrupt
31 76193d7c 2003-09-30 devnull 	 * and try again.
32 76193d7c 2003-09-30 devnull 	 */
33 76193d7c 2003-09-30 devnull 	inted = 0;
34 76193d7c 2003-09-30 devnull 	while(recv(io->creply, nil) == -1){
35 76193d7c 2003-09-30 devnull 		inted = 1;
36 76193d7c 2003-09-30 devnull 		iointerrupt(io);
37 76193d7c 2003-09-30 devnull 	}
38 76193d7c 2003-09-30 devnull 	USED(inted);
39 76193d7c 2003-09-30 devnull 	va_end(io->arg);
40 76193d7c 2003-09-30 devnull 	ret = io->ret;
41 76193d7c 2003-09-30 devnull 	if(ret < 0)
42 76193d7c 2003-09-30 devnull 		errstr(io->err, sizeof io->err);
43 76193d7c 2003-09-30 devnull 	io->inuse = 0;
44 76193d7c 2003-09-30 devnull 
45 76193d7c 2003-09-30 devnull 	/* release resources */
46 76193d7c 2003-09-30 devnull 	while(send(io->creply, &io) == -1)
47 76193d7c 2003-09-30 devnull 		;
48 76193d7c 2003-09-30 devnull 	return ret;
49 76193d7c 2003-09-30 devnull }