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