public object Invoke(Delegate d, params object[] args)
{
// Schedule synchronous task
AutoResetEvent taskDone = new AutoResetEvent(false);
lock (_taskDoneEvents) {
_taskDoneEvents.Add(taskDone);
}
NikonTask task = new NikonTask(d, args, taskDone);
EnqueueTask(task);
taskDone.WaitOne();
lock (_taskDoneEvents) {
_taskDoneEvents.Remove(taskDone);
}
// If an exception occurred during execution of the task (on the worker thread), re-throw
// it here, on the waiting thread.
if (task.Exception != null)
{
throw task.Exception;
}
return(task.Result);
}
public void Run()
{
// Enter the run loop
while (!_shuttingDown)
{
// Get next task in queue
NikonTask task = null;
lock (_tasks) {
if (_tasks.Count > 0)
{
task = _tasks.Dequeue();
}
}
// If we have a task, execute it. Otherwise wait for a new task to arrive
if (task != null)
{
task.Execute();
// Store first exceptions caused by an asynchronous task
if (task.Exception != null && !task.IsSynchronous && _asyncException == null)
{
Interlocked.Exchange <Exception>(ref _asyncException, task.Exception);
}
}
else
{
_haveTask.WaitOne();
}
}
}
public void BeginInvoke(Delegate d, params object[] args)
{
// Schedule asynchronous task
NikonTask task = new NikonTask(d, args);
EnqueueTask(task);
}
private void EnqueueTask(NikonTask task)
{
// Add task to queue
lock (_tasks) {
_tasks.Enqueue(task);
}
// Signal the run loop that we have a pending task
_haveTask.Set();
}
void EnqueueTask(NikonTask task)
{
// Add task to queue
lock (_tasks)
{
_tasks.Enqueue(task);
}
// Signal the run loop that we have a pending task
_haveTask.Set();
}
public object Invoke(Delegate d, params object[] args)
{
// Schedule synchronous task
AutoResetEvent taskDone = new AutoResetEvent(false);
lock (_taskDoneEvents)
{
_taskDoneEvents.Add(taskDone);
}
NikonTask task = new NikonTask(d, args, taskDone);
EnqueueTask(task);
taskDone.WaitOne();
lock (_taskDoneEvents)
{
_taskDoneEvents.Remove(taskDone);
}
// If an exception occurred during execution of the
// task (on the worker thread), re-throw it here, on
// the waiting thread.
if (task.Exception != null)
{
throw task.Exception;
}
return task.Result;
}
public void BeginInvoke(Delegate d, params object[] args)
{
// Schedule asynchronous task
NikonTask task = new NikonTask(d, args);
EnqueueTask(task);
}
