internal static extern void FSEventStreamUnscheduleFromRunLoop(
SafeEventStreamHandle streamRef,
CFRunLoopRef runLoop,
SafeCreateHandle runLoopMode);
/// <summary>
/// Creates a new EventStream to listen to events from the core OS (such as File System events).
/// </summary>
/// <param name="cb">A callback instance that will be called for every event batch.</param>
/// <param name="pathsToWatch">A CFArray of the path(s) to watch for events.</param>
/// <param name="sinceWhen">
/// The start point to receive events from. This can be to retrieve historical events or only new events.
/// To get historical events, pass in the corresponding ID of the event you want to start from.
/// To get only new events, pass in kFSEventStreamEventIdSinceNow.
/// </param>
/// <param name="latency">Coalescing period to wait before sending events.</param>
/// <param name="flags">Flags to say what kind of events should be sent through this stream.</param>
/// <returns>On success, returns a valid SafeCreateHandle to an FSEventStream object; otherwise, returns an invalid SafeCreateHandle</returns>
internal static SafeEventStreamHandle FSEventStreamCreate(
FSEventStreamCallback cb,
SafeCreateHandle pathsToWatch,
FSEventStreamEventId sinceWhen,
CFTimeInterval latency,
FSEventStreamCreateFlags flags)
{
return FSEventStreamCreate(IntPtr.Zero, cb, IntPtr.Zero, pathsToWatch, sinceWhen, latency, flags);
}
private static unsafe void CreateAndStartRunLoop()
{
Debug.Assert(s_dynamicStoreRef == null);
var storeContext = new Interop.SystemConfiguration.SCDynamicStoreContext();
using (SafeCreateHandle storeName = Interop.CoreFoundation.CFStringCreateWithCString("NetworkAddressChange.OSX"))
{
s_dynamicStoreRef = Interop.SystemConfiguration.SCDynamicStoreCreate(
storeName.DangerousGetHandle(),
s_storeCallback,
&storeContext);
}
// Notification key string parts. We want to match notification keys
// for any kind of IP address change, addition, or removal.
using (SafeCreateHandle dynamicStoreDomainStateString = Interop.CoreFoundation.CFStringCreateWithCString("State:"))
using (SafeCreateHandle compAnyRegexString = Interop.CoreFoundation.CFStringCreateWithCString("[^/]+"))
using (SafeCreateHandle entNetIpv4String = Interop.CoreFoundation.CFStringCreateWithCString("IPv4"))
using (SafeCreateHandle entNetIpv6String = Interop.CoreFoundation.CFStringCreateWithCString("IPv6"))
{
if (dynamicStoreDomainStateString.IsInvalid || compAnyRegexString.IsInvalid
|| entNetIpv4String.IsInvalid || entNetIpv6String.IsInvalid)
{
s_dynamicStoreRef.Dispose();
s_dynamicStoreRef = null;
throw new NetworkInformationException(SR.net_PInvokeError);
}
using (SafeCreateHandle ipv4Pattern = Interop.SystemConfiguration.SCDynamicStoreKeyCreateNetworkServiceEntity(
dynamicStoreDomainStateString.DangerousGetHandle(),
compAnyRegexString.DangerousGetHandle(),
entNetIpv4String.DangerousGetHandle()))
using (SafeCreateHandle ipv6Pattern = Interop.SystemConfiguration.SCDynamicStoreKeyCreateNetworkServiceEntity(
dynamicStoreDomainStateString.DangerousGetHandle(),
compAnyRegexString.DangerousGetHandle(),
entNetIpv6String.DangerousGetHandle()))
using (SafeCreateHandle patterns = Interop.CoreFoundation.CFArrayCreate(
new CFStringRef[2]
{
ipv4Pattern.DangerousGetHandle(),
ipv6Pattern.DangerousGetHandle()
}, 2))
{
// Try to register our pattern strings with the dynamic store instance.
if (patterns.IsInvalid || !Interop.SystemConfiguration.SCDynamicStoreSetNotificationKeys(
s_dynamicStoreRef.DangerousGetHandle(),
IntPtr.Zero,
patterns.DangerousGetHandle()))
{
s_dynamicStoreRef.Dispose();
s_dynamicStoreRef = null;
throw new NetworkInformationException(SR.net_PInvokeError);
}
// Create a "RunLoopSource" that can be added to our listener thread's RunLoop.
s_runLoopSource = Interop.SystemConfiguration.SCDynamicStoreCreateRunLoopSource(
s_dynamicStoreRef.DangerousGetHandle(),
IntPtr.Zero);
}
}
s_runLoopThread = new Thread(RunLoopThreadStart);
s_runLoopThread.Start();
s_runLoopStartedEvent.WaitOne(); // Wait for the new thread to finish initialization.
}
private static extern SafeEventStreamHandle FSEventStreamCreate(
IntPtr allocator,
FSEventStreamCallback cb,
IntPtr context,
SafeCreateHandle pathsToWatch,
FSEventStreamEventId sinceWhen,
CFTimeInterval latency,
FSEventStreamCreateFlags flags);
private static void RunLoopThreadStart()
{
Debug.Assert(s_runLoop == IntPtr.Zero);
s_runLoop = Interop.RunLoop.CFRunLoopGetCurrent();
Interop.RunLoop.CFRunLoopAddSource(
s_runLoop,
s_runLoopSource.DangerousGetHandle(),
Interop.RunLoop.kCFRunLoopDefaultMode.DangerousGetHandle());
s_runLoopStartedEvent.Set();
Interop.RunLoop.CFRunLoopRun();
Interop.RunLoop.CFRunLoopRemoveSource(
s_runLoop,
s_runLoopSource.DangerousGetHandle(),
Interop.RunLoop.kCFRunLoopDefaultMode.DangerousGetHandle());
s_runLoop = IntPtr.Zero;
s_runLoopSource.Dispose();
s_runLoopSource = null;
s_dynamicStoreRef.Dispose();
s_dynamicStoreRef = null;
s_runLoopEndedEvent.Set();
}
