basis/core-foundation/fsevents/fsevents.factor

   1 ! Copyright (C) 2008 Slava Pestov
   2 ! See http://factorcode.org/license.txt for BSD license.
   3 USING: alien alien.c-types alien.data alien.strings alien.syntax
   4 kernel math sequences namespaces make assocs init accessors
   5 continuations combinators io.encodings.utf8 destructors locals
   6 arrays specialized-arrays classes.struct core-foundation
   7 core-foundation.arrays core-foundation.run-loop
   8 core-foundation.strings core-foundation.time unix.types ;
   9 FROM: namespaces => change-global ;
  10 IN: core-foundation.fsevents
  11
  12 SPECIALIZED-ARRAY: void*
  13 SPECIALIZED-ARRAY: int
  14 SPECIALIZED-ARRAY: longlong
  15
  16 CONSTANT: kFSEventStreamCreateFlagUseCFTypes 2
  17 CONSTANT: kFSEventStreamCreateFlagWatchRoot 4
  18
  19 CONSTANT: kFSEventStreamEventFlagMustScanSubDirs 1
  20 CONSTANT: kFSEventStreamEventFlagUserDropped 2
  21 CONSTANT: kFSEventStreamEventFlagKernelDropped 4
  22 CONSTANT: kFSEventStreamEventFlagEventIdsWrapped 8
  23 CONSTANT: kFSEventStreamEventFlagHistoryDone 16
  24 CONSTANT: kFSEventStreamEventFlagRootChanged 32
  25 CONSTANT: kFSEventStreamEventFlagMount 64
  26 CONSTANT: kFSEventStreamEventFlagUnmount 128
  27
  28 TYPEDEF: int FSEventStreamCreateFlags
  29 TYPEDEF: int FSEventStreamEventFlags
  30 TYPEDEF: longlong FSEventStreamEventId
  31 TYPEDEF: void* FSEventStreamRef
  32
  33 STRUCT: FSEventStreamContext
  34     { version CFIndex }
  35     { info void* }
  36     { retain void* }
  37     { release void* }
  38     { copyDescription void* } ;
  39
  40 CALLBACK: void FSEventStreamCallback ( FSEventStreamRef streamRef, void* clientCallBackInfo, size_t numEvents, void* eventPaths, FSEventStreamEventFlags* eventFlags, FSEventStreamEventId* eventIds ) ;
  41
  42 CONSTANT: FSEventStreamEventIdSinceNow 0xFFFFFFFFFFFFFFFF
  43
  44 FUNCTION: FSEventStreamRef FSEventStreamCreate (
  45     CFAllocatorRef           allocator,
  46     FSEventStreamCallback    callback,
  47     FSEventStreamContext*    context,
  48     CFArrayRef               pathsToWatch,
  49     FSEventStreamEventId     sinceWhen,
  50     CFTimeInterval           latency,
  51     FSEventStreamCreateFlags flags ) ;
  52
  53 FUNCTION: FSEventStreamRef FSEventStreamCreateRelativeToDevice (
  54     CFAllocatorRef           allocator,
  55     FSEventStreamCallback    callback,
  56     FSEventStreamContext*    context,
  57     dev_t                    deviceToWatch,
  58     CFArrayRef               pathsToWatchRelativeToDevice,
  59     FSEventStreamEventId     sinceWhen,
  60     CFTimeInterval           latency,
  61     FSEventStreamCreateFlags flags ) ;
  62
  63 FUNCTION: FSEventStreamEventId FSEventStreamGetLatestEventId ( FSEventStreamRef streamRef ) ;
  64
  65 FUNCTION: dev_t FSEventStreamGetDeviceBeingWatched ( FSEventStreamRef streamRef ) ;
  66
  67 FUNCTION: CFArrayRef FSEventStreamCopyPathsBeingWatched ( FSEventStreamRef streamRef ) ;
  68
  69 FUNCTION: FSEventStreamEventId FSEventsGetCurrentEventId ( ) ;
  70
  71 FUNCTION: CFUUIDRef FSEventsCopyUUIDForDevice ( dev_t dev ) ;
  72
  73 FUNCTION: FSEventStreamEventId FSEventsGetLastEventIdForDeviceBeforeTime (
  74     dev_t          dev,
  75     CFAbsoluteTime time ) ;
  76
  77 FUNCTION: Boolean FSEventsPurgeEventsForDeviceUpToEventId (
  78     dev_t                dev,
  79     FSEventStreamEventId eventId ) ;
  80
  81 FUNCTION: void FSEventStreamRetain ( FSEventStreamRef streamRef ) ;
  82
  83 FUNCTION: void FSEventStreamRelease ( FSEventStreamRef streamRef ) ;
  84
  85 FUNCTION: void FSEventStreamScheduleWithRunLoop (
  86     FSEventStreamRef streamRef,
  87     CFRunLoopRef     runLoop,
  88     CFStringRef      runLoopMode ) ;
  89
  90 FUNCTION: void FSEventStreamUnscheduleFromRunLoop (
  91     FSEventStreamRef streamRef,
  92     CFRunLoopRef     runLoop,
  93     CFStringRef      runLoopMode ) ;
  94
  95 FUNCTION: void FSEventStreamInvalidate ( FSEventStreamRef streamRef ) ;
  96
  97 FUNCTION: Boolean FSEventStreamStart ( FSEventStreamRef streamRef ) ;
  98
  99 FUNCTION: FSEventStreamEventId FSEventStreamFlushAsync ( FSEventStreamRef streamRef ) ;
 100
 101 FUNCTION: void FSEventStreamFlushSync ( FSEventStreamRef streamRef ) ;
 102
 103 FUNCTION: void FSEventStreamStop ( FSEventStreamRef streamRef ) ;
 104
 105 FUNCTION: void FSEventStreamShow ( FSEventStreamRef streamRef ) ;
 106
 107 FUNCTION: CFStringRef FSEventStreamCopyDescription ( FSEventStreamRef streamRef ) ;
 108
 109 : make-FSEventStreamContext ( info -- alien )
 110     FSEventStreamContext <struct>
 111         swap >>info ;
 112
 113 :: <FSEventStream> ( callback info paths latency flags -- event-stream )
 114     f ! allocator
 115     callback
 116     info make-FSEventStreamContext
 117     paths <CFStringArray>
 118     FSEventStreamEventIdSinceNow ! sinceWhen
 119     latency
 120     flags
 121     FSEventStreamCreate ;
 122
 123 C-GLOBAL: void* kCFRunLoopCommonModes
 124
 125 : schedule-event-stream ( event-stream -- )
 126     CFRunLoopGetMain
 127     kCFRunLoopCommonModes
 128     FSEventStreamScheduleWithRunLoop ;
 129
 130 : unschedule-event-stream ( event-stream -- )
 131     CFRunLoopGetMain
 132     kCFRunLoopCommonModes
 133     FSEventStreamUnscheduleFromRunLoop ;
 134
 135 : enable-event-stream ( event-stream -- )
 136     dup
 137     schedule-event-stream
 138     dup FSEventStreamStart [
 139         drop
 140     ] [
 141         dup unschedule-event-stream
 142         FSEventStreamRelease
 143         "Cannot enable FSEventStream" throw
 144     ] if ;
 145
 146 : disable-event-stream ( event-stream -- )
 147     dup FSEventStreamStop
 148     unschedule-event-stream ;
 149
 150 SYMBOL: event-stream-callbacks
 151
 152 : event-stream-counter ( -- n )
 153     \ event-stream-counter counter ;
 154
 155 [
 156     event-stream-callbacks
 157     [ [ drop expired? not ] assoc-filter H{ } assoc-like ] change-global
 158 ] "core-foundation" add-startup-hook
 159
 160 : add-event-source-callback ( quot -- id )
 161     event-stream-counter <alien>
 162     [ event-stream-callbacks get set-at ] keep ;
 163
 164 : remove-event-source-callback ( id -- )
 165     event-stream-callbacks get delete-at ;
 166
 167 :: (master-event-source-callback) ( eventStream info numEvents eventPaths eventFlags eventIds -- )
 168     eventPaths numEvents void* <c-direct-array> [ utf8 alien>string ] { } map-as
 169     eventFlags numEvents int <c-direct-array>
 170     eventIds numEvents longlong <c-direct-array>
 171     3array flip
 172     info event-stream-callbacks get at [ drop ] or call( changes -- ) ;
 173
 174 : master-event-source-callback ( -- alien )
 175     [ (master-event-source-callback) ] FSEventStreamCallback ;
 176
 177 TUPLE: event-stream < disposable info handle ;
 178
 179 : <event-stream> ( quot paths latency flags -- event-stream )
 180     [
 181         add-event-source-callback
 182         [ master-event-source-callback ] keep
 183     ] 3dip <FSEventStream>
 184     dup enable-event-stream
 185     event-stream new-disposable swap >>handle swap >>info ;
 186
 187 M: event-stream dispose*
 188     {
 189         [ info>> remove-event-source-callback ]
 190         [ handle>> disable-event-stream ]
 191         [ handle>> FSEventStreamInvalidate ]
 192         [ handle>> FSEventStreamRelease ]
 193     } cleave ;