public object NewWatcher(M fsw)
{
var handle = new object();
var result = new C();
result.Changed += (object o, FileSystemEventArgs args) =>
Task.Run(() => ProxyDispatch(o, FileAction.Modified, args));
result.Created += (object o, FileSystemEventArgs args) =>
Task.Run(() => ProxyDispatch(o, FileAction.Added, args));
result.Deleted += (object o, FileSystemEventArgs args) =>
Task.Run(() => ProxyDispatch(o, FileAction.Removed, args));
result.Renamed += (object o, RenamedEventArgs args) =>
Task.Run(() => ProxyDispatch(o, FileAction.RenamedNewName, args));
result.Error += (object o, ErrorEventArgs args) =>
Task.Run(() => ProxyDispatchError(handle, args));
Operation(map_op: (in_map, out_map, event_map, _) => {
in_map.Add(handle, result);
out_map.Add(handle, fsw);
event_map.Add(result, handle);
});
return(handle);
}
protected void Operation(Action <IDictionary <object, C>, ConditionalWeakTable <object, M>, IDictionary <object, object>, Handle> map_op = null, Action <C, M> object_op = null, object handle = null, Action <C, M> cancel_op = null)
{
C internal_fsw = null;
M fsw = null;
bool live, havelock;
if (cancel_op != null) // highest priority and must not lock
{
havelock = Monitor.TryEnter(instance, INTERRUPT_MS);
live = (handle != null && (internal_map.TryGetValue(handle, out internal_fsw) || external_map.TryGetValue(handle, out fsw)));
if (live && havelock)
{
try { cancel_op(internal_fsw, fsw); }
catch (Exception) { }
}
;
if (havelock)
{
Monitor.Exit(instance);
}
if (live && !havelock)
{
try {
var t = Task <bool> .Run(() => { cancel_op(internal_fsw, fsw); return(true); });
t.Wait(INTERRUPT_MS);
}
catch (Exception) { }
}
;
return;
}
if (map_op != null && handle == null)
{
lock (instance) {
try { map_op(internal_map, external_map, event_map, null); }
catch (Exception e) { throw new InvalidOperationException(nameof(map_op), e); }
}
return;
}
if (handle == null)
{
return;
}
lock (instance) {
live = (internal_map.TryGetValue(handle, out internal_fsw) && external_map.TryGetValue(handle, out fsw));
if (live && map_op != null)
{
try { map_op(internal_map, external_map, event_map, handle); }
catch (Exception e) { throw new InvalidOperationException(nameof(map_op), e); };
}
}
if (!live || object_op == null)
{
return;
}
try { object_op(internal_fsw, fsw); }
catch (Exception e) { throw new InvalidOperationException(nameof(object_op), e); };
}