protected override void InnerCollectGarbage()
{
lock (_executionSynchronizer)
{
_jsEngine.CollectGarbage(true);
}
}
public void Clear()
{
_context.Execute("Handlebars.templates = []; " +
"Handlebars.partials = []; ");
// a good opportunity to return ram to it's rightful owner
_context.CollectGarbage(true);
}
private static void Cleanup(V8ScriptEngine engine)
{
var data = engine.Script as DynamicObject;
var cleanup = new StringBuilder();
foreach (var item in data.GetDynamicMemberNames())
{
if (item != "EngineInternal")
{
cleanup.Append("delete " + item + ";");
}
}
engine.Execute(cleanup.ToString());
engine.CollectGarbage(true);
}
void IDisposable.Dispose()
{
foreach (var s in services)
{
engine.AddHostObject(s, new object());
engine.Execute(string.Format("delete {0};", s));
}
services.Clear();
SetContext(null);
sw.Stop();
if (Pool.GarbageCollection != JsEnginePoolGarbageStrategy.Automatic)
{
engine.CollectGarbage(exhaustive: (Pool.GarbageCollection == JsEnginePoolGarbageStrategy.ExhaustiveAfterUse));
}
Console.WriteLine("Engine {0}#{1,-3} Thread {2,-3} used for {3}.", PoolName, SerialNumber, Thread.CurrentThread.ManagedThreadId, sw.Elapsed);
Pool.ReturnToPool(this);
}
public void V8ScriptEngine_ResourceConstraints_Dual()
{
const int limit = 4 * 1024 * 1024;
const string code = @"x = []; for (i = 0; i < 1024 * 1024; i++) { x.push(x); }";
engine.Execute(code);
engine.CollectGarbage(true);
var usedHeapSize = engine.GetRuntimeHeapInfo().UsedHeapSize;
var constraints = new V8RuntimeConstraints
{
MaxYoungSpaceSize = limit,
MaxOldSpaceSize = limit,
MaxExecutableSize = limit
};
engine.Dispose();
engine = new V8ScriptEngine(constraints);
TestUtil.AssertException<ScriptEngineException>(() =>
{
try
{
engine.Execute(code);
}
catch (ScriptEngineException exception)
{
Assert.IsTrue(exception.IsFatal);
throw;
}
});
engine.CollectGarbage(true);
Assert.IsTrue(usedHeapSize > engine.GetRuntimeHeapInfo().UsedHeapSize);
}
public void V8ScriptEngine_ResourceConstraints()
{
const int limit = 4 * 1024 * 1024;
const string code = @"x = []; while (true) { x.push(x); }";
var constraints = new V8RuntimeConstraints
{
MaxYoungSpaceSize = limit,
MaxOldSpaceSize = limit,
MaxExecutableSize = limit
};
engine.Dispose();
engine = new V8ScriptEngine(constraints);
TestUtil.AssertException<ScriptEngineException>(() =>
{
try
{
engine.Execute(code);
}
catch (ScriptEngineException exception)
{
Assert.IsTrue(exception.IsFatal);
throw;
}
});
TestUtil.AssertException<ScriptEngineException>(() =>
{
try
{
engine.CollectGarbage(true);
engine.Execute("x = 5");
}
catch (ScriptEngineException exception)
{
Assert.IsTrue(exception.IsFatal);
throw;
}
});
}
// Handles all events
public void EventLoop()
{
var lastGarbageCollect = DateTime.Now;
while (true)
{
var events = 0;
var eventLimitExceeded = false;
// Check if timeouts should trigger and call then
for (var i = 0; i < _timeouts.Count; i++)
{
if (events >= EventLimit)
{
eventLimitExceeded = true;
break;
}
var timeout = _timeouts[i];
if (timeout.ShouldTrigger(DateTime.Now))
{
if (!timeout.IsRepeating())
{
_timeouts.RemoveAt(i);
i--;
}
else
{
timeout.Reset();
}
timeout.Call();
events++;
}
}
events = 0;
// Handle all queued callbacks
while (_callbacks.TryDequeue(out Callback callback))
{
if (events >= EventLimit)
{
eventLimitExceeded = true;
break;
}
callback.Call();
events++;
}
events = 0;
// Handle all queued requests
while (_requests.TryDequeue(out Request request))
{
if (events >= EventLimit)
{
eventLimitExceeded = true;
break;
}
request.Call();
events++;
}
if ((DateTime.Now - lastGarbageCollect).TotalMilliseconds >= 1000)
{
try {
_engine.CollectGarbage(true);
} catch { }
lastGarbageCollect = DateTime.Now;
}
if (!eventLimitExceeded)
{
// Sleep to keep from using all CPU
Thread.Sleep(1);
}
}
}
private static void Cleanup(V8ScriptEngine engine)
{
var data = engine.Script as DynamicObject;
var cleanup = new StringBuilder();
foreach (var item in data.GetDynamicMemberNames())
{
if (item != "EngineInternal")
{
cleanup.Append("delete " + item + ";");
}
}
engine.Execute(cleanup.ToString());
engine.CollectGarbage(true);
}
