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/*
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Threadmain spawns two subprocesses, one
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to read the mouse, and one to receive
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timer events.  The events are sent via a
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channel to the main proc which prints a
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word when an event comes in.  When mouse
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button three is pressed, the application
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terminates.
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*/
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#include <u.h>
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#include <libc.h>
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#include <thread.h>
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enum
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{
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	STACK = 2048,
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};
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void
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mouseproc(void *arg)
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{
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	char m[48];
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	int mfd;
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	Channel *mc;
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	mc = arg;
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	if((mfd = open("/dev/mouse", OREAD)) < 0)
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		sysfatal("open /dev/mouse: %r");
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	for(;;){
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		if(read(mfd, m, sizeof m) != sizeof m)
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			sysfatal("eof");
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		if(atoi(m+1+2*12)&4)
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			sysfatal("button 3");
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		send(mc, m);
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	}
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}
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void
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clockproc(void *arg)
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{
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	int t;
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	Channel *c;
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	c = arg;
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	for(t=0;; t++){
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		sleep(1000);
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		sendul(c, t);
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	}
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}
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void
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threadmain(int argc, char *argv[])
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{
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	char m[48];
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	int t;
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	Alt a[] = {
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	/*	 c		v		op   */
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		{nil,	m,	CHANRCV},
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		{nil,	&t,	CHANRCV},
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		{nil,	nil,	CHANEND},
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	};
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	/* create mouse event channel and mouse process */
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	a[0].c = chancreate(sizeof m, 0);
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	proccreate(mouseproc, a[0].c, STACK);
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	/* create clock event channel and clock process */
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	a[1].c = chancreate(sizeof(ulong), 0);	/* clock event channel */
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	proccreate(clockproc, a[1].c, STACK);
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	for(;;){
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		switch(alt(a)){
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		case 0:	/*mouse event */
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			fprint(2, "click ");
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			break;
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		case 1:	/* clock event */
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			fprint(2, "tic ");
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			break;
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		default:
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			sysfatal("can't happen");
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		}
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	}
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}