ref: 7d88d76bc42e2b3f3cabde82673af4107e951797
dir: /sys/src/libthread/example.c/
/* 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"); for(;;){ if(read(mfd, m, sizeof m) != sizeof m) sysfatal("eof"); if(atoi(m+1+2*12)&4) sysfatal("button 3"); send(mc, 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, STACK); /* create clock event channel and clock process */ a[1].c = chancreate(sizeof(ulong), 0); /* clock event channel */ proccreate(clockproc, a[1].c, STACK); 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"); } } }