cog/ThirdParty/UKKQueue/UKKQueue.h

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2006-09-02 16:09:20 +00:00
/* =============================================================================
FILE: UKKQueue.h
PROJECT: Filie
COPYRIGHT: (c) 2003 M. Uli Kusterer, all rights reserved.
AUTHORS: M. Uli Kusterer - UK
LICENSES: MIT License
REVISIONS:
2006-03-13 UK Clarified license, streamlined UKFileWatcher stuff,
Changed notifications to be useful and turned off by
default some deprecated stuff.
2003-12-21 UK Created.
========================================================================== */
// -----------------------------------------------------------------------------
// Headers:
// -----------------------------------------------------------------------------
#import <Foundation/Foundation.h>
#include <sys/types.h>
#include <sys/event.h>
#import "UKFileWatcher.h"
// -----------------------------------------------------------------------------
// Constants:
// -----------------------------------------------------------------------------
// Backwards compatibility constants. Don't rely on code commented out with these constants, because it may be deleted in a future version.
#ifndef UKKQUEUE_BACKWARDS_COMPATIBLE
#define UKKQUEUE_BACKWARDS_COMPATIBLE 0 // 1 to send old-style kqueue:receivedNotification:forFile: messages to objects that accept them.
#endif
#ifndef UKKQUEUE_SEND_STUPID_NOTIFICATIONS
#define UKKQUEUE_SEND_STUPID_NOTIFICATIONS 0 // 1 to send old-style notifications that have the path as the object and no userInfo dictionary.
#endif
#ifndef UKKQUEUE_OLD_SINGLETON_ACCESSOR_NAME
#define UKKQUEUE_OLD_SINGLETON_ACCESSOR_NAME 0 // 1 to allow use of sharedQueue instead of sharedFileWatcher.
#endif
#ifndef UKKQUEUE_OLD_NOTIFICATION_NAMES
#define UKKQUEUE_OLD_NOTIFICATION_NAMES 0 // 1 to allow use of old KQueue-style notification names instead of the new more generic ones in UKFileWatcher.
#endif
// Flags for notifyingAbout:
#define UKKQueueNotifyAboutRename NOTE_RENAME // Item was renamed.
#define UKKQueueNotifyAboutWrite NOTE_WRITE // Item contents changed (also folder contents changed).
#define UKKQueueNotifyAboutDelete NOTE_DELETE // item was removed.
#define UKKQueueNotifyAboutAttributeChange NOTE_ATTRIB // Item attributes changed.
#define UKKQueueNotifyAboutSizeIncrease NOTE_EXTEND // Item size increased.
#define UKKQueueNotifyAboutLinkCountChanged NOTE_LINK // Item's link count changed.
#define UKKQueueNotifyAboutAccessRevocation NOTE_REVOKE // Access to item was revoked.
// Notifications this sends:
// (see UKFileWatcher)
// Old names: *deprecated*
#if UKKQUEUE_OLD_NOTIFICATION_NAMES
#define UKKQueueFileRenamedNotification UKFileWatcherRenameNotification
#define UKKQueueFileWrittenToNotification UKFileWatcherWriteNotification
#define UKKQueueFileDeletedNotification UKFileWatcherDeleteNotification
#define UKKQueueFileAttributesChangedNotification UKFileWatcherAttributeChangeNotification
#define UKKQueueFileSizeIncreasedNotification UKFileWatcherSizeIncreaseNotification
#define UKKQueueFileLinkCountChangedNotification UKFileWatcherLinkCountChangeNotification
#define UKKQueueFileAccessRevocationNotification UKFileWatcherAccessRevocationNotification
#endif
// -----------------------------------------------------------------------------
// UKKQueue:
// -----------------------------------------------------------------------------
@interface UKKQueue : NSObject <UKFileWatcher>
{
int queueFD; // The actual queue ID (Unix file descriptor).
NSMutableArray* watchedPaths; // List of NSStrings containing the paths we're watching.
NSMutableArray* watchedFDs; // List of NSNumbers containing the file descriptors we're watching.
id delegate; // Gets messages about changes instead of notification center, if specified.
id delegateProxy; // Proxy object to which we send messages so they reach delegate on the main thread.
BOOL alwaysNotify; // Send notifications even if we have a delegate? Defaults to NO.
BOOL keepThreadRunning; // Termination criterion of our thread.
}
+(id) sharedFileWatcher; // Returns a singleton, a shared kqueue object Handy if you're subscribing to the notifications. Use this, or just create separate objects using alloc/init. Whatever floats your boat.
-(int) queueFD; // I know you unix geeks want this...
// High-level file watching: (use UKFileWatcher protocol methods instead, where possible!)
-(void) addPathToQueue: (NSString*)path;
-(void) addPathToQueue: (NSString*)path notifyingAbout: (u_int)fflags;
-(void) removePathFromQueue: (NSString*)path;
-(id) delegate;
-(void) setDelegate: (id)newDelegate;
-(BOOL) alwaysNotify;
-(void) setAlwaysNotify: (BOOL)n;
#if UKKQUEUE_OLD_SINGLETON_ACCESSOR_NAME
+(UKKQueue*) sharedQueue;
#endif
// private:
-(void) watcherThread: (id)sender;
-(void) postNotification: (NSString*)nm forFile: (NSString*)fp; // Message-posting bottleneck.
@end
// -----------------------------------------------------------------------------
// Methods delegates need to provide:
// * DEPRECATED * use UKFileWatcher delegate methods instead!
// -----------------------------------------------------------------------------
@interface NSObject (UKKQueueDelegate)
-(void) kqueue: (UKKQueue*)kq receivedNotification: (NSString*)nm forFile: (NSString*)fpath;
@end