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();
}
private void CreateStreamAndStartWatcher()
{
Debug.Assert(_eventStream.IsInvalid);
Debug.Assert(_watcherRunLoop == IntPtr.Zero);
Debug.Assert(_callback == null);
// Make sure we only do this if there is a valid directory
if (String.IsNullOrEmpty(_directory) == false)
{
_fullDirectory = System.IO.Path.GetFullPath(_directory);
// Get the path to watch and verify we created the CFStringRef
SafeCreateHandle path = Interop.CoreFoundation.CFStringCreateWithCString(_fullDirectory);
if (path.IsInvalid)
{
throw Interop.GetExceptionForIoErrno(Interop.Sys.GetLastErrorInfo(), _fullDirectory, true);
}
// Take the CFStringRef and put it into an array to pass to the EventStream
SafeCreateHandle arrPaths = Interop.CoreFoundation.CFArrayCreate(new CFStringRef[1] {
path.DangerousGetHandle()
}, 1);
if (arrPaths.IsInvalid)
{
path.Dispose();
throw Interop.GetExceptionForIoErrno(Interop.Sys.GetLastErrorInfo(), _fullDirectory, true);
}
// Create the callback for the EventStream
_callback = new Interop.EventStream.FSEventStreamCallback(FileSystemEventCallback);
// Make sure the OS file buffer(s) are fully flushed so we don't get events from cached I/O
Interop.libc.sync();
// Create the event stream for the path and tell the stream to watch for file system events.
_eventStream = Interop.EventStream.FSEventStreamCreate(
_callback,
arrPaths,
Interop.EventStream.kFSEventStreamEventIdSinceNow,
0.0f,
EventStreamFlags);
if (_eventStream.IsInvalid)
{
arrPaths.Dispose();
path.Dispose();
throw Interop.GetExceptionForIoErrno(Interop.Sys.GetLastErrorInfo(), _fullDirectory, true);
}
// Create and start our watcher thread then wait for the thread to initialize and start
// the RunLoop. We wait for that to prevent this function from returning before the RunLoop
// has a chance to start so that any callers won't race with the background thread's initialization
// and calling Stop, which would attempt to stop a RunLoop that hasn't started yet.
_watcherThread = new Thread(new ThreadStart(WatchForFileSystemEventsThreadStart));
_watcherThread.Start();
_runLoopStartedEvent.WaitOne();
}
}
internal void Start()
{
// Get the path to watch and verify we created the CFStringRef
SafeCreateHandle path = Interop.CoreFoundation.CFStringCreateWithCString(_fullDirectory);
if (path.IsInvalid)
{
throw Interop.GetExceptionForIoErrno(Interop.Sys.GetLastErrorInfo(), _fullDirectory, true);
}
// Take the CFStringRef and put it into an array to pass to the EventStream
SafeCreateHandle arrPaths = Interop.CoreFoundation.CFArrayCreate(new CFStringRef[1] {
path.DangerousGetHandle()
}, 1);
if (arrPaths.IsInvalid)
{
path.Dispose();
throw Interop.GetExceptionForIoErrno(Interop.Sys.GetLastErrorInfo(), _fullDirectory, true);
}
// Create the callback for the EventStream if it wasn't previously created for this instance.
if (_callback == null)
{
_callback = new Interop.EventStream.FSEventStreamCallback(FileSystemEventCallback);
}
// Make sure the OS file buffer(s) are fully flushed so we don't get events from cached I/O
Interop.Sys.Sync();
// Create the event stream for the path and tell the stream to watch for file system events.
_eventStream = Interop.EventStream.FSEventStreamCreate(
_callback,
arrPaths,
Interop.EventStream.kFSEventStreamEventIdSinceNow,
0.0f,
EventStreamFlags);
if (_eventStream.IsInvalid)
{
arrPaths.Dispose();
path.Dispose();
throw Interop.GetExceptionForIoErrno(Interop.Sys.GetLastErrorInfo(), _fullDirectory, true);
}
// Create and start our watcher thread then wait for the thread to initialize and start
// the RunLoop. We wait for that to prevent this function from returning before the RunLoop
// has a chance to start so that any callers won't race with the background thread's initialization
// and calling Stop, which would attempt to stop a RunLoop that hasn't started yet.
var runLoopStarted = new ManualResetEventSlim();
new Thread(WatchForFileSystemEventsThreadStart)
{
IsBackground = true
}.Start(runLoopStarted);
runLoopStarted.Wait();
}
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()
}, (UIntPtr)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.
}
internal unsafe void Start()
{
// Make sure _fullPath doesn't contain a link or alias
// since the OS will give back the actual, non link'd or alias'd paths
_fullDirectory = Interop.Sys.RealPath(_fullDirectory);
if (_fullDirectory == null)
{
throw Interop.GetExceptionForIoErrno(Interop.Sys.GetLastErrorInfo(), _fullDirectory, true);
}
Debug.Assert(string.IsNullOrEmpty(_fullDirectory) == false, "Watch directory is null or empty");
// Normalize the _fullDirectory path to have a trailing slash
if (_fullDirectory[_fullDirectory.Length - 1] != '/')
{
_fullDirectory += "/";
}
// Get the path to watch and verify we created the CFStringRef
SafeCreateHandle path = Interop.CoreFoundation.CFStringCreateWithCString(_fullDirectory);
if (path.IsInvalid)
{
throw Interop.GetExceptionForIoErrno(Interop.Sys.GetLastErrorInfo(), _fullDirectory, true);
}
// Take the CFStringRef and put it into an array to pass to the EventStream
SafeCreateHandle arrPaths = Interop.CoreFoundation.CFArrayCreate(new CFStringRef[1] {
path.DangerousGetHandle()
}, (UIntPtr)1);
if (arrPaths.IsInvalid)
{
path.Dispose();
throw Interop.GetExceptionForIoErrno(Interop.Sys.GetLastErrorInfo(), _fullDirectory, true);
}
// Create the callback for the EventStream if it wasn't previously created for this instance.
if (_callback == null)
{
_callback = new Interop.EventStream.FSEventStreamCallback(FileSystemEventCallback);
}
_context = ExecutionContext.Capture();
// Make sure the OS file buffer(s) are fully flushed so we don't get events from cached I/O
Interop.Sys.Sync();
// Create the event stream for the path and tell the stream to watch for file system events.
_eventStream = Interop.EventStream.FSEventStreamCreate(
_callback,
arrPaths,
Interop.EventStream.kFSEventStreamEventIdSinceNow,
0.0f,
EventStreamFlags);
if (_eventStream.IsInvalid)
{
arrPaths.Dispose();
path.Dispose();
throw Interop.GetExceptionForIoErrno(Interop.Sys.GetLastErrorInfo(), _fullDirectory, true);
}
StaticWatcherRunLoopManager.ScheduleEventStream(_eventStream);
bool started = Interop.EventStream.FSEventStreamStart(_eventStream);
if (!started)
{
// Try to get the Watcher to raise the error event; if we can't do that, just silently exit since the watcher is gone anyway
FileSystemWatcher watcher;
if (_weakWatcher.TryGetTarget(out watcher))
{
// An error occurred while trying to start the run loop so fail out
watcher.OnError(new ErrorEventArgs(new IOException(SR.EventStream_FailedToStart, Marshal.GetLastWin32Error())));
}
}
}
internal unsafe void Start()
{
// Make sure _fullPath doesn't contain a link or alias
// since the OS will give back the actual, non link'd or alias'd paths
_fullDirectory = Interop.Sys.RealPath(_fullDirectory);
if (_fullDirectory == null)
{
throw Interop.GetExceptionForIoErrno(Interop.Sys.GetLastErrorInfo(), _fullDirectory, true);
}
Debug.Assert(string.IsNullOrEmpty(_fullDirectory) == false, "Watch directory is null or empty");
// Normalize the _fullDirectory path to have a trailing slash
if (_fullDirectory[_fullDirectory.Length - 1] != '/')
{
_fullDirectory += "/";
}
// Get the path to watch and verify we created the CFStringRef
SafeCreateHandle path = Interop.CoreFoundation.CFStringCreateWithCString(_fullDirectory);
if (path.IsInvalid)
{
throw Interop.GetExceptionForIoErrno(Interop.Sys.GetLastErrorInfo(), _fullDirectory, true);
}
// Take the CFStringRef and put it into an array to pass to the EventStream
SafeCreateHandle arrPaths = Interop.CoreFoundation.CFArrayCreate(new CFStringRef[1] {
path.DangerousGetHandle()
}, (UIntPtr)1);
if (arrPaths.IsInvalid)
{
path.Dispose();
throw Interop.GetExceptionForIoErrno(Interop.Sys.GetLastErrorInfo(), _fullDirectory, true);
}
// Create the callback for the EventStream if it wasn't previously created for this instance.
if (_callback == null)
{
_callback = new Interop.EventStream.FSEventStreamCallback(FileSystemEventCallback);
}
// Make sure the OS file buffer(s) are fully flushed so we don't get events from cached I/O
Interop.Sys.Sync();
// Create the event stream for the path and tell the stream to watch for file system events.
_eventStream = Interop.EventStream.FSEventStreamCreate(
_callback,
arrPaths,
Interop.EventStream.kFSEventStreamEventIdSinceNow,
0.0f,
EventStreamFlags);
if (_eventStream.IsInvalid)
{
arrPaths.Dispose();
path.Dispose();
throw Interop.GetExceptionForIoErrno(Interop.Sys.GetLastErrorInfo(), _fullDirectory, true);
}
// Create and start our watcher thread then wait for the thread to initialize and start
// the RunLoop. We wait for that to prevent this function from returning before the RunLoop
// has a chance to start so that any callers won't race with the background thread's initialization
// and calling Stop, which would attempt to stop a RunLoop that hasn't started yet.
var runLoopStarted = new ManualResetEventSlim();
new Thread(WatchForFileSystemEventsThreadStart)
{
IsBackground = true
}.Start(runLoopStarted);
runLoopStarted.Wait();
}