static Task ReleaseProjectBuilderNoLock(RemoteBuildEngine engine)
{
if (--engine.ReferenceCount != 0)
{
return(Task.CompletedTask);
}
if (engine.IsShuttingDown)
{
// If the engine is being shut down, dispose it now.
builders.Remove(engine);
engine.Dispose();
}
else
{
// Wait a bit before disposing the engine. We may need to use it again.
engine.ScheduleForDisposal(EngineDisposalDelay).ContinueWith(async t => {
using (await buildersLock.EnterAsync().ConfigureAwait(false)) {
// If this is the last standing build engine for the solution, don't dispose it.
// In this way there will always be at least one build engine for each solution,
// until explicitly unloaded.
if (!builders.GetAllBuilders().Where(b => !b.IsShuttingDown && b != engine && b.SolutionFile == engine.SolutionFile).Any())
{
return;
}
// If after the wait there are still 0 references, dispose the builder
if (engine.ReferenceCount == 0)
{
builders.Remove(engine);
engine.Dispose();
}
}
}, TaskContinuationOptions.NotOnCanceled);
}
return(Task.CompletedTask);
}
static void ShutdownBuilderNoLock(RemoteBuildEngine engine)
{
// Signal all project builder of the engine to stop
engine.Shutdown();
// If there are no references it means the engine is not being used, so it can be disposed now.
// Otherwise it will be disposed when all references are released
if (engine.ReferenceCount == 0)
{
engine.CancelScheduledDisposal();
builders.Remove(engine);
engine.Dispose();
}
}
internal static async void ReleaseProjectBuilder (RemoteBuildEngine engine)
{
using (await buildersLock.EnterAsync ()) {
if (--engine.ReferenceCount != 0)
return;
builders.Remove (engine);
}
engine.Dispose ();
}