private void CleanupStreamAndWatcher()
{
// If we're currently streaming, stop
StopStream();
// Clean up the EventStream, if it exists
if (!_eventStream.IsInvalid)
{
_eventStream = new SafeEventStreamHandle(IntPtr.Zero);
}
// Make sure there's a loop to clear
if (_watcherRunLoop != IntPtr.Zero)
{
// Stop the RunLoop and wait for the thread to exit gracefully
Interop.RunLoop.CFRunLoopStop(_watcherRunLoop);
_watcherThread.Join();
_watcherRunLoop = IntPtr.Zero;
}
// Cleanup the callback
if (_callback != null)
{
_callback = null;
}
}
internal unsafe RunningInstance(
FileSystemWatcher watcher,
string directory,
bool includeChildren,
FSEventStreamEventFlags filter)
{
Debug.Assert(!string.IsNullOrEmpty(directory));
// 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 = System.IO.Path.GetFullPath(directory);
_fullDirectory = Interop.Sys.RealPath(_fullDirectory);
if (_fullDirectory is null)
{
throw Interop.GetExceptionForIoErrno(Interop.Sys.GetLastErrorInfo(), _fullDirectory, isDirectory: true);
}
// Also ensure it has a trailing slash.
if (!_fullDirectory.EndsWith('/'))
{
_fullDirectory += "/";
}
_callback = new Interop.EventStream.FSEventStreamCallback(FileSystemEventCallback);
_weakWatcher = new WeakReference <FileSystemWatcher>(watcher);
_includeChildren = includeChildren;
_filterFlags = filter;
}
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 void CreateStreamAndStartWatcher()
{
Debug.Assert(_eventStream == IntPtr.Zero);
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)
{
// Get the path to watch and verify we created the CFStringRef
CFStringRef path = Interop.CoreFoundation.CFStringCreateWithCString(_directory);
if (path == IntPtr.Zero)
{
throw Interop.GetExceptionForIoErrno(Marshal.GetLastWin32Error(), _directory, true);
}
// Take the CFStringRef and put it into an array to pass to the EventStream
CFArrayRef arrPaths = Interop.CoreFoundation.CFArrayCreate(new CFStringRef[1] {
path
}, 1);
if (arrPaths == IntPtr.Zero)
{
throw Interop.GetExceptionForIoErrno(Marshal.GetLastWin32Error(), _directory, true);
}
// Create the callback for the EventStream
_callback = new Interop.EventStream.FSEventStreamCallback(FileSystemEventCallback);
// 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,
0.2f,
EventStreamFlags);
if (_eventStream == IntPtr.Zero)
{
throw Interop.GetExceptionForIoErrno(Marshal.GetLastWin32Error(), _directory, true);
}
// The paths are copied inside FSEventStreamCreate so delete our references
Interop.CoreFoundation.CFRelease(path);
Interop.CoreFoundation.CFRelease(arrPaths);
// 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();
}
}
private void CleanupStreamAndWatcher()
{
// Make sure there's a loop to clear
if (_watcherRunLoop != IntPtr.Zero)
{
// Stop the RunLoop and wait for the thread to exit gracefully
Interop.RunLoop.CFRunLoopStop(_watcherRunLoop);
_watcherThread.Join();
_watcherRunLoop = IntPtr.Zero;
}
// Clean up the EventStream, if it exists
if (_eventStream != IntPtr.Zero)
{
Interop.CoreFoundation.CFRelease(_eventStream);
_eventStream = IntPtr.Zero;
}
// Cleanup the callback
if (_callback != null)
{
_callback = null;
}
}
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();
}