/** wait for howlong, for one more message to be available */
public static boolean wait_timeout(EProc proc, EObject howlong) throws Pausable {
try {
proc.check_exit();
if (ipclog.isLoggable(Level.FINE))
ipclog.fine("WAIT| " + proc + " waits for messages for " + howlong + " ms");
if (howlong == am_infinity) {
proc.mbox.untilHasMessages(proc.midx + 1);
proc.check_exit();
if (ipclog.isLoggable(Level.FINE)) ipclog.fine("WAIT| " + proc + " wakes up on message");
return true;
} else {
long now = System.currentTimeMillis();
if (proc.midx == 0 || proc.timeout_start == 0L) {
proc.timeout_start = now;
}
EInteger ei;
if ((ei = howlong.testInteger()) == null)
throw new ErlangError(EAtom.intern("timeout_value"));
long end = proc.timeout_start + ei.longValue();
long left = end - now;
if (left < 0) {
return false;
}
if (!proc.in_receive) {
Task.sleep(left);
return false;
} else {
if (ipclog.isLoggable(Level.FINE))
ipclog.fine(
"WAIT| " + proc + " waiting for " + left + "ms for msg #" + (proc.midx + 1));
boolean res = proc.mbox.untilHasMessages(proc.midx + 1, left);
proc.check_exit();
if (ipclog.isLoggable(Level.FINE))
ipclog.fine("WAIT| " + proc + " wakes up " + (res ? "on message" : "after timeout"));
return res;
}
}
} finally {
proc.in_receive = false;
}
}
@BIF
public static EObject start_timer(EObject time, final EObject rcv, final EObject msg) {
// check arguments
EInteger when = time.testInteger();
final EInternalPID rcv_pid = rcv.testInternalPID();
EAtom rcv_atom = rcv.testAtom();
if (when == null
|| gt(when, max_send_time)
|| lt(when, zero)
|| (rcv_pid == null && rcv_atom == null)) {
throw ERT.badarg(time, rcv, msg);
}
ETimerTask send_task =
new ETimerTask(rcv_pid) {
@Override
public void on_timeout() throws Pausable {
ETuple3 timeout_msg = new ETuple3();
timeout_msg.elem1 = am_timeout;
timeout_msg.elem2 = this.ref;
timeout_msg.elem3 = msg;
EHandle p;
if ((p = rcv.testHandle()) != null) {
p.sendb(timeout_msg);
return;
}
p = register.get(rcv);
if (p != null) {
p.sendb(timeout_msg);
}
}
};
send_task.schedule(when.longValue());
return send_task.ref;
}
@BIF
public static EObject send_after(
final EProc proc, EObject time, final EObject rcv, final EObject msg) {
// check arguments
EInteger when = time.testInteger();
final EInternalPID rcv_pid = rcv.testInternalPID();
EAtom rcv_atom = rcv.testAtom();
if (when == null
|| gt(when, max_send_time)
|| lt(when, zero)
|| (rcv_pid == null && rcv_atom == null)) {
throw ERT.badarg(time, rcv, msg);
}
ETimerTask send_task =
new ETimerTask(rcv_pid) {
@Override
public void on_timeout() throws Pausable {
EHandle p;
if ((p = rcv.testHandle()) != null) {
p.send(proc.self_handle(), msg);
return;
}
p = register.get(rcv);
if (p != null) {
p.send(proc.self_handle(), msg);
}
}
};
send_task.schedule(when.longValue());
return send_task.ref;
}
