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 d51419bf 2004-02-09 devnull 	char e[ERRMAX];
 7 76193d7c 2003-09-30 devnull 	int ret, inted;
 8 76193d7c 2003-09-30 devnull 	Ioproc *msg;
 9 76193d7c 2003-09-30 devnull 
10 76193d7c 2003-09-30 devnull 	if(send(io->c, &io) == -1){
11 76193d7c 2003-09-30 devnull 		werrstr("interrupted");
12 76193d7c 2003-09-30 devnull 		return -1;
13 76193d7c 2003-09-30 devnull 	}
14 76193d7c 2003-09-30 devnull 	assert(!io->inuse);
15 76193d7c 2003-09-30 devnull 	io->inuse = 1;
16 76193d7c 2003-09-30 devnull 	io->op = op;
17 76193d7c 2003-09-30 devnull 	va_start(io->arg, op);
18 76193d7c 2003-09-30 devnull 	msg = io;
19 76193d7c 2003-09-30 devnull 	inted = 0;
20 76193d7c 2003-09-30 devnull 	while(send(io->creply, &msg) == -1){
21 76193d7c 2003-09-30 devnull 		msg = nil;
22 76193d7c 2003-09-30 devnull 		inted = 1;
23 76193d7c 2003-09-30 devnull 	}
24 76193d7c 2003-09-30 devnull 	if(inted){
25 76193d7c 2003-09-30 devnull 		werrstr("interrupted");
26 76193d7c 2003-09-30 devnull 		return -1;
27 76193d7c 2003-09-30 devnull 	}
28 76193d7c 2003-09-30 devnull 
29 76193d7c 2003-09-30 devnull 	/*
30 76193d7c 2003-09-30 devnull 	 * If we get interrupted, we have stick around so that
31 76193d7c 2003-09-30 devnull 	 * the IO proc has someone to talk to.  Send it an interrupt
32 76193d7c 2003-09-30 devnull 	 * and try again.
33 76193d7c 2003-09-30 devnull 	 */
34 76193d7c 2003-09-30 devnull 	inted = 0;
35 76193d7c 2003-09-30 devnull 	while(recv(io->creply, nil) == -1){
36 76193d7c 2003-09-30 devnull 		inted = 1;
37 76193d7c 2003-09-30 devnull 		iointerrupt(io);
38 76193d7c 2003-09-30 devnull 	}
39 76193d7c 2003-09-30 devnull 	USED(inted);
40 76193d7c 2003-09-30 devnull 	va_end(io->arg);
41 76193d7c 2003-09-30 devnull 	ret = io->ret;
42 76193d7c 2003-09-30 devnull 	if(ret < 0)
43 d51419bf 2004-02-09 devnull 		strecpy(e, e+sizeof e, io->err);
44 76193d7c 2003-09-30 devnull 	io->inuse = 0;
45 76193d7c 2003-09-30 devnull 
46 76193d7c 2003-09-30 devnull 	/* release resources */
47 76193d7c 2003-09-30 devnull 	while(send(io->creply, &io) == -1)
48 76193d7c 2003-09-30 devnull 		;
49 d51419bf 2004-02-09 devnull 	if(ret < 0)
50 d51419bf 2004-02-09 devnull 		errstr(e, sizeof e);
51 76193d7c 2003-09-30 devnull 	return ret;
52 76193d7c 2003-09-30 devnull }