void
umain(void)
{
u_int who, i;
i = 0;
if ((who = sfork()) != 0) {
printf("i am %08x; env is %p\n", sys_getenvid(), env);
// get the ball rolling
printf("send 0 from %x to %x\n", sys_getenvid(), who);
ipc_send(who, 0, 0, 0);
}
for (;;) {
ipc_recv(&who, 0, 0);
printf("%x got %d from %x (env is %p %x)\n", sys_getenvid(), val, who, env, env->env_id);
if (val == 10)
return;
++val;
ipc_send(who, 0, 0, 0);
if (val == 10)
return;
}
}
void
umain(int argc, char **argv)
{
envid_t who;
uint32_t i;
i = 0;
if ((who = sfork()) != 0) {
cprintf("i am %08x; thisenv is %p\n", sys_getenvid(), thisenv);
// get the ball rolling
cprintf("send 0 from %x to %x\n", sys_getenvid(), who);
ipc_send(who, 0, 0, 0);
}
while (1) {
cprintf("%x prepare to recv from %x (thisenv is %p %x)\n", sys_getenvid(), who, thisenv, thisenv->env_id);
ipc_recv(&who, 0, 0);
cprintf("%x got %d from %x (thisenv is %p %x)\n", sys_getenvid(), val, who, thisenv, thisenv->env_id);
if (val == 10)
return;
++val;
ipc_send(who, 0, 0, 0);
if (val == 10)
return;
}
}
void
umain(int argc, char **argv)
{
envid_t env;
cprintf("Father:%04x", sys_getenvid());
a=1;
if ((env = sfork()) == 0) {
while (1) {
cprintf("child:a=%d\n",a);
sys_yield();
}
exit();
}
sys_yield();
sys_yield();
sys_yield();
sys_yield();
sys_yield();
sys_yield();
cprintf("Father:a changed\n");
a=2;
sys_yield();
sys_yield();
sys_yield();
sys_yield();
sys_yield();
sys_yield();
cprintf("Killing the child\n");
sys_env_destroy(env);
}
void
umain(int argc, char **argv)
{
int c = sfork();
if (c != 0){
cprintf("parent: %d\n", k);
k = 255;
}
else {
cprintf("child: %d\n", k);
}
}
void
forkchild(const char *cur, char branch)
{
char nxt[DEPTH+1];
if (strlen(cur) >= DEPTH)
return;
snprintf(nxt, DEPTH+1, "%s%c", cur, branch);
if (sfork() == 0) {
forktree(nxt);
exit();
}
}
