1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/*******************************************************************************
* Copyright (c) 2006, 2010 Wind River Systems, Inc. and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Markus Schorn - initial API and implementation
* Andrew Ferguson (Symbian)
* Sergey Prigogin (Google)
*******************************************************************************/
package org.eclipse.cdt.internal.core.index;
import java.util.Collection;
import org.eclipse.cdt.core.dom.ast.IASTName;
import org.eclipse.cdt.core.dom.ast.IASTPreprocessorStatement;
import org.eclipse.cdt.core.index.IIndexFile;
import org.eclipse.cdt.core.index.IIndexFileLocation;
import org.eclipse.cdt.internal.core.pdom.ASTFilePathResolver;
import org.eclipse.cdt.internal.core.pdom.YieldableIndexLock;
import org.eclipse.core.runtime.CoreException;
public class WritableCIndex extends CIndex implements IWritableIndex {
final private IWritableIndexFragment fWritableFragment;
private boolean fIsWriteLocked= false;
private Object fThread;
public WritableCIndex(IWritableIndexFragment writable, IIndexFragment[] readonly) {
super(concat(writable, readonly));
fWritableFragment= writable;
}
private static IIndexFragment[] concat(IIndexFragment writable, IIndexFragment[] readonly) {
IIndexFragment[] result= new IIndexFragment[1 + readonly.length];
result[0]= writable;
System.arraycopy(readonly, 0, result, 1, readonly.length);
return result;
}
public IWritableIndexFragment getWritableFragment() {
return fWritableFragment;
}
public IIndexFragmentFile getWritableFile(int linkageID, IIndexFileLocation location) throws CoreException {
return fWritableFragment.getFile(linkageID, location);
}
public IIndexFragmentFile[] getWritableFiles(IIndexFileLocation location) throws CoreException {
return fWritableFragment.getFiles(location);
}
public IIndexFragmentFile addFile(int linkageID, IIndexFileLocation location) throws CoreException {
return fWritableFragment.addFile(linkageID, location);
}
public IIndexFragmentFile addUncommittedFile(int linkageID, IIndexFileLocation location) throws CoreException {
return fWritableFragment.addUncommittedFile(linkageID, location);
}
public IIndexFragmentFile commitUncommittedFile() throws CoreException {
return fWritableFragment.commitUncommittedFile();
}
public void clearUncommittedFile() throws CoreException {
fWritableFragment.clearUncommittedFile();
}
private boolean isWritableFragment(IIndexFragment frag) {
return frag == fWritableFragment;
}
public void setFileContent(IIndexFragmentFile file, int linkageID, IncludeInformation[] includes,
IASTPreprocessorStatement[] macros, IASTName[][] names, ASTFilePathResolver resolver,
YieldableIndexLock lock) throws CoreException, InterruptedException {
IIndexFragment indexFragment = file.getIndexFragment();
if (!isWritableFragment(indexFragment)) {
assert false : "Attempt to update file of read-only fragment"; //$NON-NLS-1$
} else {
for (IncludeInformation ii : includes) {
if (ii.fLocation != null) {
ii.fTargetFile= addFile(linkageID, ii.fLocation);
}
}
((IWritableIndexFragment) indexFragment).addFileContent(file, includes, macros, names, resolver, lock);
}
}
public void clear() throws CoreException {
fWritableFragment.clear();
}
public boolean isWritableFile(IIndexFile file) {
return file instanceof IIndexFragmentFile &&
isWritableFragment(((IIndexFragmentFile)file).getIndexFragment());
}
public void clearFile(IIndexFragmentFile file, Collection<IIndexFileLocation> clearedContexts) throws CoreException {
IIndexFragment indexFragment = file.getIndexFragment();
if (!isWritableFragment(indexFragment)) {
assert false : "Attempt to clear file of read-only fragment"; //$NON-NLS-1$
} else {
((IWritableIndexFragment) indexFragment).clearFile(file, clearedContexts);
}
}
@Override
public void acquireReadLock() throws InterruptedException {
checkThread();
assert !fIsWriteLocked: "Read locks are not allowed while write-locked."; //$NON-NLS-1$
super.acquireReadLock();
}
@Override
public void releaseReadLock() {
checkThread();
assert !fIsWriteLocked: "Read locks are not allowed while write-locked."; //$NON-NLS-1$
super.releaseReadLock();
if (getReadLockCount() == 0)
fThread= null;
}
public void acquireWriteLock(int giveupReadlockCount) throws InterruptedException {
checkThread();
assert !fIsWriteLocked: "Multiple write locks is not allowed"; //$NON-NLS-1$
assert giveupReadlockCount == getReadLockCount(): "Unexpected read lock is not allowed"; //$NON-NLS-1$
fWritableFragment.acquireWriteLock(giveupReadlockCount);
fIsWriteLocked= true;
}
public void releaseWriteLock(int establishReadlockCount) {
releaseWriteLock(establishReadlockCount, true);
}
public void releaseWriteLock(int establishReadlockCount, boolean flush) {
checkThread();
assert fIsWriteLocked: "No write lock to be released"; //$NON-NLS-1$
assert establishReadlockCount == getReadLockCount(): "Unexpected read lock is not allowed"; //$NON-NLS-1$
// Bug 297641: Result cache of read only providers needs to be cleared.
if (establishReadlockCount == 0) {
clearResultCache();
}
fIsWriteLocked= false;
fWritableFragment.releaseWriteLock(establishReadlockCount, flush);
if (establishReadlockCount == 0) {
fThread= null;
}
}
private void checkThread() {
if (fThread == null) {
fThread= Thread.currentThread();
} else if (fThread != Thread.currentThread()) {
throw new IllegalArgumentException("A writable index must not be used from multiple threads."); //$NON-NLS-1$
}
}
@Override
public void clearResultCache() {
assert fIsWriteLocked: "Need to hold a write lock to clear result caches"; //$NON-NLS-1$
super.clearResultCache();
}
public void flush() throws CoreException {
assert !fIsWriteLocked;
fWritableFragment.flush();
}
/* (non-Javadoc)
* @see org.eclipse.cdt.internal.core.index.IWritableIndex#getDatabaseSizeBytes()
*/
public long getDatabaseSizeBytes() {
return fWritableFragment.getDatabaseSizeBytes();
}
}
|
