Mercurial > projects > dwt-linux
annotate dwt/dwthelper/WeakHashMap.d @ 364:2bcb17ebe0be default tip
fix: thx torhu
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Sun, 08 Nov 2009 20:57:46 +0100 |
| parents | 695802b523c0 |
| children |
| rev | line source |
|---|---|
| 223 | 1 module dwt.dwthelper.WeakHashMap; |
| 2 | |
| 3 | |
| 226 | 4 private { |
| 5 alias void delegate(Object) DisposeEvt; | |
| 6 extern (C) void rt_attachDisposeEvent( Object obj, DisposeEvt evt ); | |
| 7 extern (C) void rt_detachDisposeEvent( Object obj, DisposeEvt evt ); | |
| 8 } | |
| 9 | |
| 10 | |
| 223 | 11 /+ |
| 12 Is not yet 'weak' | |
| 13 +/ | |
| 14 class WeakHashMap { | |
| 15 | |
| 16 static class Ref { | |
| 17 size_t ptr; | |
| 18 this(Object k){ | |
| 19 ptr = cast(size_t)cast(void*)k; | |
| 20 } | |
| 226 | 21 override hash_t toHash(){ |
| 22 return cast(hash_t)ptr; | |
| 23 } | |
| 24 override int opEquals( Object o ){ | |
| 25 if( auto other = cast(Ref)o ){ | |
| 26 return ptr is other.ptr; | |
| 27 } | |
| 28 return false; | |
| 29 } | |
| 30 } | |
| 31 | |
| 32 private Ref unhookKey; | |
| 33 | |
| 34 private void unhook(Object o) { | |
| 35 unhookKey.ptr = cast(size_t)cast(void*)o; | |
| 36 if( auto p = unhookKey in data ){ | |
| 37 rt_detachDisposeEvent(o, &unhook); | |
| 38 data.remove( unhookKey ); | |
| 39 } | |
| 223 | 40 } |
| 41 | |
| 42 Object[ Ref ] data; | |
| 226 | 43 ClassInfo gcLock; |
| 44 this(){ | |
| 45 unhookKey = new Ref(null); | |
| 46 gcLock = ClassInfo.find( "gcx.GCLock" ); | |
| 47 } | |
| 223 | 48 |
|
292
695802b523c0
Adjustements for the container rework in dwt-addons
Frank Benoit <benoit@tionex.de>
parents:
226
diff
changeset
|
49 public void put (Object key, Object element){ |
| 223 | 50 auto k = new Ref(key); |
| 226 | 51 rt_attachDisposeEvent(key, &unhook); |
| 223 | 52 data[ k ] = element; |
| 53 } | |
|
292
695802b523c0
Adjustements for the container rework in dwt-addons
Frank Benoit <benoit@tionex.de>
parents:
226
diff
changeset
|
54 public void remove (Object key){ |
| 223 | 55 scope k = new Ref(key); |
| 226 | 56 if( auto p = k in data ){ |
| 57 data.remove( k ); | |
| 58 rt_detachDisposeEvent(key, &unhook); | |
| 59 } | |
| 223 | 60 } |
| 61 public Object get(Object key){ | |
| 62 scope k = new Ref(key); | |
| 63 if( auto p = k in data ){ | |
| 64 return *p; | |
| 65 } | |
| 66 return null; | |
| 67 } | |
| 68 } |