Do I need to synchronize calls to the Dispatcher.Invoke if accessing from multiple background threads?
如果从多个后台线程访问,是否需要同步对Dispatcher.Invoke的调用?
I know the Dispatcher.BeginInvoke automatically synchronizes calls for silverlight app (http://msdn.microsoft.com/en-us/library/z8chs7ft(v=vs.95).aspx)
我知道Dispatcher.BeginInvoke会自动同步对silverlight app的调用(http://msdn.microsoft.com/en-us/library/z8chs7ft(v=vs.95).aspx)
Is it also true for a wpf application or should I uncomment the lock statement below.
对于wpf应用程序也是如此,或者我应该取消注释下面的lock语句。
public MainWindow()
{
InitializeComponent();
Dispatcher.BeginInvoke(new Action(() =>
{
const int MAX_NR_THREADS = 1000;
for (int i = 0; i < MAX_NR_THREADS; ++i)
{
int j = i+1;
new Thread(()=>ThreadMethod(j)).Start();
}
}));
}
private void ThreadMethod(int threadId)
{
const int ONE_MILLION = 1000000;
for (int i = 0; i < ONE_MILLION/threadId; ++i)
{
//lock(lockObj)
//{
this.Dispatcher.Invoke(new Action(() =>
{
int sum = 0;
for (int j = 0; j < ONE_MILLION/10000; ++j)
{
sum += j;
}
int a = sum;
concurrentQueue.Enqueue(threadId*ONE_MILLION);
}));
//}
}
}
1 个解决方案
#1
6
There is no need to synchronize these calls. Dispatcher.Invoke
effectively acts as a queue for your calls already, and doesn't require synchronization.
无需同步这些调用。 Dispatcher.Invoke已经有效地充当您的调用队列,并且不需要同步。
#1
6
There is no need to synchronize these calls. Dispatcher.Invoke
effectively acts as a queue for your calls already, and doesn't require synchronization.
无需同步这些调用。 Dispatcher.Invoke已经有效地充当您的调用队列,并且不需要同步。