static void monitorEnterSync(TObject o) {
if (o.monitor == null) {
o.monitor = new Monitor();
}
if (o.monitor.owner == null) {
o.monitor.owner = TThread.currentThread();
} else if (o.monitor.owner != TThread.currentThread()) {
throw new IllegalStateException("Can't enter monitor from another thread synchronously");
}
o.monitor.count++;
}
static void monitorEnter(TObject o, int count) {
if (o.monitor == null) {
o.monitor = new Monitor();
}
if (o.monitor.owner == null) {
o.monitor.owner = TThread.currentThread();
}
if (o.monitor.owner != TThread.currentThread()) {
monitorEnterWait(o, count);
} else {
o.monitor.count += count;
}
}
@Sync
static void monitorExit(final TObject o, int count) {
if (o.isEmptyMonitor() || o.monitor.owner != TThread.currentThread()) {
throw new TIllegalMonitorStateException();
}
o.monitor.count -= count;
if (o.monitor.count > 0) {
return;
}
o.monitor.owner = null;
if (!o.monitor.enteringThreads.isEmpty()) {
Platform.postpone(
() -> {
if (o.isEmptyMonitor() || o.monitor.owner != null) {
return;
}
if (!o.monitor.enteringThreads.isEmpty()) {
o.monitor.enteringThreads.remove().run();
}
});
} else {
o.isEmptyMonitor();
}
}
static void monitorExitSync(TObject o) {
if (o.isEmptyMonitor() || o.monitor.owner != TThread.currentThread()) {
throw new TIllegalMonitorStateException();
}
if (--o.monitor.count == 0) {
o.monitor.owner = null;
}
o.isEmptyMonitor();
}
private static class NotifyListenerImpl
implements NotifyListener, TimerHandler, PlatformRunnable, TThreadInterruptHandler {
final TObject obj;
final AsyncCallback<Void> callback;
final TThread currentThread = TThread.currentThread();
int timerId = -1;
boolean expired;
boolean performed;
int lockCount;
public NotifyListenerImpl(TObject obj, AsyncCallback<Void> callback, int lockCount) {
this.obj = obj;
this.callback = callback;
this.lockCount = lockCount;
}
@Override
public boolean expired() {
boolean result = expired;
expired = true;
return result;
}
@Override
public void onTimer() {
if (!expired()) {
run();
}
}
@Override
public void run() {
if (performed) {
return;
}
performed = true;
if (timerId >= 0) {
Platform.killSchedule(timerId);
timerId = -1;
}
TThread.setCurrentThread(currentThread);
monitorEnterWait(obj, lockCount, callback);
}
@Override
public void interrupted() {
if (performed) {
return;
}
performed = true;
if (timerId >= 0) {
Platform.killSchedule(timerId);
timerId = -1;
}
Platform.postpone(() -> callback.error(new TInterruptedException()));
}
}
@Override
public void run() {
if (performed) {
return;
}
performed = true;
if (timerId >= 0) {
Platform.killSchedule(timerId);
timerId = -1;
}
TThread.setCurrentThread(currentThread);
monitorEnterWait(obj, lockCount, callback);
}
static void monitorEnterWait(
final TObject o, final int count, final AsyncCallback<Void> callback) {
final TThread thread = TThread.currentThread();
if (o.monitor == null) {
o.monitor = new Monitor();
TThread.setCurrentThread(thread);
o.monitor.count += count;
callback.complete(null);
return;
} else if (o.monitor.owner == null) {
o.monitor.owner = thread;
TThread.setCurrentThread(thread);
o.monitor.count += count;
callback.complete(null);
return;
}
o.monitor.enteringThreads.add(
() -> {
TThread.setCurrentThread(thread);
o.monitor.owner = thread;
o.monitor.count += count;
callback.complete(null);
});
}
public Monitor() {
this.owner = TThread.currentThread();
enteringThreads = Platform.createQueue();
notifyListeners = Platform.createQueue();
}
static boolean holdsLock(TObject o) {
return o.monitor != null && o.monitor.owner == TThread.currentThread();
}
