|
1 // Copyright (c) 1996-2009 Nokia Corporation and/or its subsidiary(-ies). |
|
2 // All rights reserved. |
|
3 // This component and the accompanying materials are made available |
|
4 // under the terms of "Eclipse Public License v1.0" |
|
5 // which accompanies this distribution, and is available |
|
6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
7 // |
|
8 // Initial Contributors: |
|
9 // Nokia Corporation - initial contribution. |
|
10 // |
|
11 // Contributors: |
|
12 // |
|
13 // Description: |
|
14 // Object index |
|
15 // |
|
16 // |
|
17 |
|
18 #include "WSOBJIX.H" |
|
19 |
|
20 #include "OBJECT.H" |
|
21 #include "server.h" |
|
22 #include "panics.h" |
|
23 |
|
24 const TInt KNewObjectInitialCount = 1; |
|
25 |
|
26 CWsObjectIx::CWsObjectIx() : iObjectArray(8), iNewObjectCount(KNewObjectInitialCount) |
|
27 { |
|
28 } |
|
29 |
|
30 CWsObjectIx::~CWsObjectIx() |
|
31 { |
|
32 TInt count=iObjectArray.Count(); |
|
33 if (count==0) |
|
34 return; |
|
35 TWsObject* ptr=&iObjectArray[0]; |
|
36 const TWsObject* end=ptr+count; |
|
37 for (;ptr<end;ptr++) |
|
38 { |
|
39 CWsObject* obj=ptr->iObject; |
|
40 if (obj) |
|
41 { |
|
42 ptr->iObject=NULL; |
|
43 obj->CloseObject(); |
|
44 } |
|
45 } |
|
46 iObjectArray.Reset(); |
|
47 } |
|
48 |
|
49 void CWsObjectIx::ConstructL() |
|
50 { |
|
51 // Insert a dummy object into the first slot to avoid |
|
52 // having a null handle |
|
53 TWsObject nullObject(NULL,0); |
|
54 iObjectArray.AppendL(nullObject); |
|
55 } |
|
56 |
|
57 /** Adds the object to the list. |
|
58 |
|
59 If there is an empty slot (i.e. a slot that was previously used but has been freed) the |
|
60 object is put in that slot else a new slot is created at the end of the array. |
|
61 |
|
62 @param anObj The object to add to the list. |
|
63 @return The handle to be used by the client to identify this object. |
|
64 @internalComponent |
|
65 @released |
|
66 */ |
|
67 TInt CWsObjectIx::AddL(CWsObject* anObj) |
|
68 { |
|
69 TWsObject* ptr=&iObjectArray[0]; |
|
70 const TWsObject* base=ptr; |
|
71 TInt index=iObjectArray.Count(); |
|
72 const TWsObject* end=ptr+index; |
|
73 WS_ASSERT_DEBUG(base->iObject==NULL, EWsPanicObjectIndexError); |
|
74 |
|
75 // Search for an empty slot |
|
76 while(++ptr<end) |
|
77 { |
|
78 if (ptr->iObject==NULL) |
|
79 { |
|
80 ptr->iObject=anObj; |
|
81 index=ptr-base; |
|
82 break; |
|
83 } |
|
84 } |
|
85 |
|
86 // create a new handle for the object |
|
87 TUint handleCount = ((iNewObjectCount<<TWsObject::ECountPosition) + TWsObject::ECountInc) & TWsObject::ECountMask; |
|
88 |
|
89 if (ptr==end) |
|
90 { |
|
91 // No available empty slot, so append this object to the queue |
|
92 if (index==TWsObject::ECountInc) |
|
93 { |
|
94 User::LeaveNoMemory(); //Things will go wrong later if we ever have more 64K objects |
|
95 } |
|
96 TWsObject newObject(anObj,handleCount); |
|
97 iObjectArray.AppendL(newObject); |
|
98 ptr=&iObjectArray[index]; |
|
99 } |
|
100 |
|
101 // assign the object a unique server-side handle (combination of handle count & object type) |
|
102 ptr->iHandle = handleCount | anObj->Type(); |
|
103 |
|
104 // increment the object counter |
|
105 if (++iNewObjectCount==TWsObject::ECountWrapAround) |
|
106 iNewObjectCount = KNewObjectInitialCount; |
|
107 |
|
108 // return to the client their unique handle for the object (combination of handle count & slot number) |
|
109 return (handleCount + index); |
|
110 } |
|
111 |
|
112 void CWsObjectIx::Tidy() |
|
113 { |
|
114 TInt count=iObjectArray.Count()-1; |
|
115 while(count>0) // Don't delete object [0] |
|
116 { |
|
117 if (iObjectArray[count].iObject!=NULL) |
|
118 break; |
|
119 iObjectArray.Delete(count--); |
|
120 } |
|
121 } |
|
122 |
|
123 void CWsObjectIx::Remove(CWsObject* anObj) |
|
124 { |
|
125 const TWsObject* ptr=FirstObject(); |
|
126 const TWsObject* end=ptr+iObjectArray.Count(); |
|
127 WS_ASSERT_DEBUG(ptr->iObject==NULL, EWsPanicObjectIndexError); |
|
128 while(++ptr<end) |
|
129 { |
|
130 if (ptr->iObject==anObj) |
|
131 { |
|
132 Remove(ptr); |
|
133 Tidy(); |
|
134 return; |
|
135 } |
|
136 } |
|
137 } |
|
138 |
|
139 void CWsObjectIx::Remove(const TWsObject* aObject) |
|
140 { |
|
141 WS_ASSERT_DEBUG(aObject->iObject!=NULL, EWsPanicObjectIndexError); |
|
142 WS_ASSERT_DEBUG((aObject->iHandle&TWsObject::ETypeMask)==(TUint)aObject->iObject->Type(), EWsPanicObjectIndexError); |
|
143 const_cast<TWsObject*>(aObject)->iObject=NULL; |
|
144 } |
|
145 |
|
146 CWsObject* CWsObjectIx::HandleToObject(TInt aHandle) const |
|
147 { |
|
148 TInt slot=aHandle&TWsObject::ESlotMask; |
|
149 if (slot<0 || slot>=iObjectArray.Count()) |
|
150 return(NULL); |
|
151 const TWsObject* object=&iObjectArray[slot]; |
|
152 if ((object->iHandle&TWsObject::ECountMask)==((TUint)aHandle&TWsObject::ECountMask)) |
|
153 { |
|
154 return object->iObject; |
|
155 } |
|
156 return(NULL); |
|
157 } |
|
158 |
|
159 const TWsObject* CWsObjectIx::FirstObject() const |
|
160 { |
|
161 return(&iObjectArray[0]); |
|
162 } |
|
163 |
|
164 TInt CWsObjectIx::At(const CWsObject* anObj) |
|
165 { |
|
166 const TWsObject* base=FirstObject(); |
|
167 const TWsObject* ptr=base; |
|
168 const TWsObject* end=base+iObjectArray.Count(); |
|
169 WS_ASSERT_DEBUG(ptr->iObject==NULL, EWsPanicObjectIndexError); |
|
170 while(++ptr<end) |
|
171 { |
|
172 if (ptr->iObject==anObj && (ptr->iHandle&TWsObject::ETypeMask)==(TUint)anObj->Type()) |
|
173 return(ptr-base); |
|
174 } |
|
175 return(KErrNotFound); |
|
176 } |
|
177 |
|
178 TInt CWsObjectIx::Count() const |
|
179 { |
|
180 const TWsObject* ptr=FirstObject(); |
|
181 const TWsObject* end=ptr+iObjectArray.Count(); |
|
182 WS_ASSERT_DEBUG(ptr->iObject==NULL, EWsPanicObjectIndexError); |
|
183 TInt count=0; |
|
184 while(++ptr<end) |
|
185 { |
|
186 if (ptr->iObject && ptr->iObject->Type()!=WS_HANDLE_CLIENT) |
|
187 count++; |
|
188 } |
|
189 return(count); |
|
190 } |
|
191 |
|
192 TInt CWsObjectIx::Length() const |
|
193 { |
|
194 return(iObjectArray.Count()); |
|
195 } |