48 lines
1.8 KiB
C#
48 lines
1.8 KiB
C#
|
namespace System.Web.Mvc.Async {
|
|||
|
|
using System;
|
|||
|
|
using System.Diagnostics.CodeAnalysis;
|
|||
|
|
using System.Threading;
|
|||
|
|
|
|||
|
|
internal static class SynchronizationContextUtil {
|
|||
|
|
|
|||
|
|
public static SynchronizationContext GetSynchronizationContext() {
|
|||
|
|
// In a runtime environment, SynchronizationContext.Current will be set to an instance
|
|||
|
|
// of AspNetSynchronizationContext. In a unit test environment, the Current property
|
|||
|
|
// won't be set and we have to create one on the fly.
|
|||
|
|
return SynchronizationContext.Current ?? new SynchronizationContext();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
[SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes", Justification = "The exception is swallowed and immediately re-thrown")]
|
|||
|
|
public static T Sync<T>(this SynchronizationContext syncContext, Func<T> func) {
|
|||
|
|
T theValue = default(T);
|
|||
|
|
Exception thrownException = null;
|
|||
|
|
|
|||
|
|
syncContext.Send(o =>
|
|||
|
|
{
|
|||
|
|
try {
|
|||
|
|
theValue = func();
|
|||
|
|
}
|
|||
|
|
catch (Exception ex) {
|
|||
|
|
// by default, the AspNetSynchronizationContext type will swallow thrown exceptions,
|
|||
|
|
// so we need to save and propagate them
|
|||
|
|
thrownException = ex;
|
|||
|
|
}
|
|||
|
|
}, null);
|
|||
|
|
|
|||
|
|
if (thrownException != null) {
|
|||
|
|
throw Error.SynchronizationContextUtil_ExceptionThrown(thrownException);
|
|||
|
|
}
|
|||
|
|
return theValue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public static void Sync(this SynchronizationContext syncContext, Action action) {
|
|||
|
|
Sync<AsyncVoid>(syncContext, () =>
|
|||
|
|
{
|
|||
|
|
action();
|
|||
|
|
return default(AsyncVoid);
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
}
|