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import java.util.*; |
10 |
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11 |
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/** |
12 |
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* A class with the same API and array-based characteristics as {@link |
13 |
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* java.util.Vector} but with reduced contention and improved |
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* A class with the same methods and array-based characteristics as |
13 |
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* {@link java.util.Vector} but with reduced contention and improved |
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* throughput when invocations of read-only methods by multiple |
15 |
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* threads are most common. Instances of this class may have |
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* relatively poorer performance in other contexts. |
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* threads are most common. |
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* |
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* <p> The iterators returned by this class's {@link #iterator() |
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* iterator} and {@link #listIterator(int) listIterator} methods are |
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* best-effort in the presence of concurrent modifications, and do |
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* <em>NOT</em> throw {@link ConcurrentModificationException}. An |
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* iterator's {@code next()} method returns consecutive elements as |
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* they appear in the underlying array upon each access. |
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* they appear in the underlying array upon each access. Alternatvely, |
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* method {@link #snapshotIterator} may be used for deterministic |
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* traversals, at the expense of making a copy, and unavailability of |
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* method {@code Iterator.remove}. |
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* |
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* <p>Otherwise, this class supports all methods, under the same |
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* documented specifications, as {@code Vector}. Consult {@link |
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|
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/* |
39 |
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* This class exists mainly as a vehicle to exercise various |
40 |
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* constructions using SequenceLocks, which are not yet explained |
41 |
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* well here. |
40 |
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* constructions using SequenceLocks. Read-only methods |
41 |
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* take one of a few forms: |
42 |
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* |
43 |
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* Short methods,including get(index), continually retry obtaining |
44 |
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* a snapshot of array, count, and element, using sequence number |
45 |
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* to validate. |
46 |
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* |
47 |
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* Methods that are potentially O(n) (or worse) try once in |
48 |
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* read-only mode, and then lock. When in read-only mode, they |
49 |
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* validate only at the end of an array scan unless the element is |
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* actually used (for example, as an argument of method equals). |
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*/ |
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|
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/** |
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private static final int MAX_ARRAY_SIZE = Integer.MAX_VALUE - 8; |
58 |
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|
59 |
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// fields are non-private to simpify nested class access |
60 |
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Object[] array; |
60 |
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volatile Object[] array; |
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final SequenceLock lock; |
62 |
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int count; |
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volatile int count; |
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final int capacityIncrement; |
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|
65 |
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/** |
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* as well as sublist and iterator classes. |
155 |
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*/ |
156 |
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|
157 |
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static int internalIndexOf(Object o, Object[] items, |
158 |
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int index, int fence) { |
157 |
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// Version of indexOf that returns -1 if either not present or invalid |
158 |
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final int validatedIndexOf(Object x, Object[] items, int index, int fence, |
159 |
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long seq) { |
160 |
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for (int i = index; i < fence; ++i) { |
161 |
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Object e = items[i]; |
162 |
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if (lock.getSequence() != seq) |
163 |
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break; |
164 |
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if ((x == null) ? e == null : x.equals(e)) |
165 |
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return i; |
166 |
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} |
167 |
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return -1; |
168 |
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} |
169 |
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|
170 |
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final int rawIndexOf(Object x, int index, int fence) { |
171 |
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Object[] items = array; |
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for (int i = index; i < fence; ++i) { |
173 |
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Object x = items[i]; |
174 |
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if (o == null? x == null : (x != null && o.equals(x))) |
173 |
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Object e = items[i]; |
174 |
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if ((x == null) ? e == null : x.equals(e)) |
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return i; |
176 |
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} |
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return -1; |
178 |
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} |
179 |
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|
180 |
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static int internalLastIndexOf(Object o, Object[] items, |
181 |
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int index, int origin) { |
180 |
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final int validatedLastIndexOf(Object x, Object[] items, |
181 |
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int index, int origin, long seq) { |
182 |
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for (int i = index; i >= origin; --i) { |
183 |
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Object x = items[i]; |
184 |
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if (o == null? x == null : (x != null && o.equals(x))) |
183 |
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Object e = items[i]; |
184 |
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if (lock.getSequence() != seq) |
185 |
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break; |
186 |
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if ((x == null) ? e == null : x.equals(e)) |
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return i; |
188 |
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} |
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return -1; |
190 |
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} |
191 |
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|
192 |
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final void internalAdd(E e) { |
193 |
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int c = count; |
194 |
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if (c >= array.length) |
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grow(c + 1); |
196 |
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array[c] = e; |
197 |
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count = c + 1; |
192 |
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final int rawLastIndexOf(Object x, int index, int origin) { |
193 |
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Object[] items = array; |
194 |
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for (int i = index; i >= origin; --i) { |
195 |
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Object e = items[i]; |
196 |
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if ((x == null) ? e == null : x.equals(e)) |
197 |
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return i; |
198 |
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} |
199 |
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return -1; |
200 |
> |
} |
201 |
> |
|
202 |
> |
final void rawAdd(Object e) { |
203 |
> |
int n = count; |
204 |
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Object[] items = array; |
205 |
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if (n < items.length) |
206 |
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items[n] = e; |
207 |
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else { |
208 |
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grow(n + 1); |
209 |
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array[n] = e; |
210 |
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} |
211 |
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count = n + 1; |
212 |
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} |
213 |
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|
214 |
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final void internalAddAt(int index, E e) { |
215 |
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int c = count; |
216 |
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if (index > c) |
214 |
> |
final void rawAddAt(int index, Object e) { |
215 |
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int n = count; |
216 |
> |
if (index > n) |
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throw new ArrayIndexOutOfBoundsException(index); |
218 |
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if (c >= array.length) |
219 |
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grow(c + 1); |
220 |
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System.arraycopy(array, index, array, index + 1, c - index); |
221 |
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array[index] = e; |
222 |
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count = c + 1; |
218 |
> |
if (n >= array.length) |
219 |
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grow(n + 1); |
220 |
> |
Object[] items = array; |
221 |
> |
if (index < n) |
222 |
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System.arraycopy(items, index, items, index + 1, n - index); |
223 |
> |
items[index] = e; |
224 |
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count = n + 1; |
225 |
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} |
226 |
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|
227 |
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final boolean internalAddAllAt(int index, Object[] elements) { |
228 |
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int c = count; |
229 |
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if (index < 0 || index > c) |
227 |
> |
final boolean rawAddAllAt(int index, Object[] elements) { |
228 |
> |
int n = count; |
229 |
> |
if (index < 0 || index > n) |
230 |
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throw new ArrayIndexOutOfBoundsException(index); |
231 |
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int len = elements.length; |
232 |
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if (len == 0) |
233 |
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return false; |
234 |
< |
int newCount = c + len; |
234 |
> |
int newCount = n + len; |
235 |
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if (newCount >= array.length) |
236 |
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grow(newCount); |
237 |
< |
int mv = count - index; |
237 |
> |
Object[] items = array; |
238 |
> |
int mv = n - index; |
239 |
|
if (mv > 0) |
240 |
< |
System.arraycopy(array, index, array, index + len, mv); |
241 |
< |
System.arraycopy(elements, 0, array, index, len); |
240 |
> |
System.arraycopy(items, index, items, index + len, mv); |
241 |
> |
System.arraycopy(elements, 0, items, index, len); |
242 |
|
count = newCount; |
243 |
|
return true; |
244 |
|
} |
245 |
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|
246 |
< |
final boolean internalRemoveAt(int index) { |
247 |
< |
int c = count - 1; |
248 |
< |
if (index < 0 || index > c) |
246 |
> |
final boolean rawRemoveAt(int index) { |
247 |
> |
Object[] items = array; |
248 |
> |
int n = count - 1; |
249 |
> |
if (index < 0 || index > n) |
250 |
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return false; |
251 |
< |
int mv = c - index; |
251 |
> |
int mv = n - index; |
252 |
|
if (mv > 0) |
253 |
< |
System.arraycopy(array, index + 1, array, index, mv); |
254 |
< |
array[c] = null; |
255 |
< |
count = c; |
253 |
> |
System.arraycopy(items, index + 1, items, index, mv); |
254 |
> |
items[n] = null; |
255 |
> |
count = n; |
256 |
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return true; |
257 |
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} |
258 |
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|
259 |
|
/** |
260 |
|
* Internal version of removeAll for lists and sublists. In this |
261 |
< |
* and other similar methods below, the span argument is, if |
262 |
< |
* non-negative, the purported size of a list/sublist, or is left |
263 |
< |
* negative if the size should be determined via count field under |
264 |
< |
* lock. |
261 |
> |
* and other similar methods below, the bound argument is, if |
262 |
> |
* non-negative, the purported upper bound of a list/sublist, or |
263 |
> |
* is left negative if the bound should be determined via count |
264 |
> |
* field under lock. |
265 |
|
*/ |
266 |
< |
final boolean internalRemoveAll(Collection<?> c, int origin, int span) { |
266 |
> |
final boolean internalRemoveAll(Collection<?> c, int origin, int bound) { |
267 |
|
SequenceLock lock = this.lock; |
268 |
|
boolean removed = false; |
269 |
|
lock.lock(); |
270 |
|
try { |
271 |
< |
int fence = count; |
272 |
< |
if (span >= 0 && origin + span < fence) |
229 |
< |
fence = origin + span; |
271 |
> |
int n = count; |
272 |
> |
int fence = bound < 0 || bound > n ? n : bound; |
273 |
|
if (origin >= 0 && origin < fence) { |
274 |
|
for (Object x : c) { |
275 |
< |
while (internalRemoveAt(internalIndexOf(x, array, |
233 |
< |
origin, fence))) |
275 |
> |
while (rawRemoveAt(rawIndexOf(x, origin, fence))) |
276 |
|
removed = true; |
277 |
|
} |
278 |
|
} |
282 |
|
return removed; |
283 |
|
} |
284 |
|
|
285 |
< |
final boolean internalRetainAll(Collection<?> c, int origin, int span) { |
285 |
> |
final boolean internalRetainAll(Collection<?> c, int origin, int bound) { |
286 |
|
SequenceLock lock = this.lock; |
287 |
|
boolean removed = false; |
288 |
|
if (c != this) { |
289 |
|
lock.lock(); |
290 |
|
try { |
291 |
+ |
Object[] items = array; |
292 |
|
int i = origin; |
293 |
< |
int fence = count; |
294 |
< |
if (span >= 0 && origin + span < fence) |
295 |
< |
fence = origin + span; |
296 |
< |
while (i < fence) { |
254 |
< |
if (c.contains(array[i])) |
293 |
> |
int n = count; |
294 |
> |
int fence = bound < 0 || bound > n ? n : bound; |
295 |
> |
while (i >= 0 && i < fence) { |
296 |
> |
if (c.contains(items[i])) |
297 |
|
++i; |
298 |
|
else { |
299 |
|
--fence; |
300 |
|
int mv = --count - i; |
301 |
|
if (mv > 0) |
302 |
< |
System.arraycopy(array, i + 1, array, i, mv); |
302 |
> |
System.arraycopy(items, i + 1, items, i, mv); |
303 |
|
removed = true; |
304 |
|
} |
305 |
|
} |
310 |
|
return removed; |
311 |
|
} |
312 |
|
|
313 |
< |
final void internalClear(int origin, int span) { |
314 |
< |
int c = count; |
315 |
< |
int fence = c; |
316 |
< |
if (span >= 0 && origin + span < fence) |
275 |
< |
fence = origin + span; |
313 |
> |
final void internalClear(int origin, int bound) { |
314 |
> |
Object[] items = array; |
315 |
> |
int n = count; |
316 |
> |
int fence = bound < 0 || bound > n ? n : bound; |
317 |
|
if (origin >= 0 && origin < fence) { |
318 |
|
int removed = fence - origin; |
319 |
< |
int newCount = c - removed; |
320 |
< |
int mv = c - (origin + removed); |
319 |
> |
int newCount = n - removed; |
320 |
> |
int mv = n - (origin + removed); |
321 |
|
if (mv > 0) |
322 |
< |
System.arraycopy(array, origin + removed, array, origin, mv); |
323 |
< |
for (int i = c; i < newCount; ++i) |
324 |
< |
array[i] = null; |
322 |
> |
System.arraycopy(items, origin + removed, items, origin, mv); |
323 |
> |
for (int i = n; i < newCount; ++i) |
324 |
> |
items[i] = null; |
325 |
|
count = newCount; |
326 |
|
} |
327 |
|
} |
328 |
|
|
329 |
< |
final boolean internalContainsAll(Collection<?> coll, int origin, int span) { |
329 |
> |
final boolean internalContainsAll(Collection<?> c, int origin, int bound) { |
330 |
|
SequenceLock lock = this.lock; |
331 |
|
boolean contained; |
332 |
|
boolean locked = false; |
335 |
|
long seq = lock.awaitAvailability(); |
336 |
|
Object[] items = array; |
337 |
|
int len = items.length; |
338 |
< |
int c = count; |
339 |
< |
if (c > len) |
338 |
> |
int n = count; |
339 |
> |
if (n > len) |
340 |
|
continue; |
341 |
< |
int fence = c; |
342 |
< |
if (span >= 0 && origin + span < fence) |
302 |
< |
fence = origin + span; |
303 |
< |
if (origin < 0 || fence > c) |
341 |
> |
int fence = bound < 0 || bound > n ? n : bound; |
342 |
> |
if (origin < 0) |
343 |
|
contained = false; |
344 |
|
else { |
345 |
|
contained = true; |
346 |
< |
for (Object e : coll) { |
347 |
< |
if (internalIndexOf(e, items, origin, fence) < 0) { |
346 |
> |
for (Object e : c) { |
347 |
> |
int idx = (locked ? |
348 |
> |
rawIndexOf(e, origin, fence) : |
349 |
> |
validatedIndexOf(e, items, origin, |
350 |
> |
fence, seq)); |
351 |
> |
if (idx < 0) { |
352 |
|
contained = false; |
353 |
|
break; |
354 |
|
} |
366 |
|
return contained; |
367 |
|
} |
368 |
|
|
369 |
< |
final boolean internalEquals(List<?> list, int origin, int span) { |
369 |
> |
final boolean internalEquals(List<?> list, int origin, int bound) { |
370 |
|
SequenceLock lock = this.lock; |
328 |
– |
boolean equal; |
371 |
|
boolean locked = false; |
372 |
+ |
boolean equal; |
373 |
|
try { |
374 |
|
for (;;) { |
332 |
– |
equal = true; |
375 |
|
long seq = lock.awaitAvailability(); |
376 |
|
Object[] items = array; |
377 |
< |
int len = items.length; |
378 |
< |
int c = count; |
337 |
< |
if (c > len) |
338 |
< |
continue; |
339 |
< |
int fence = c; |
340 |
< |
if (span >= 0 && origin + span < fence) |
341 |
< |
fence = origin + span; |
342 |
< |
if (origin < 0 || fence > c) |
377 |
> |
int n = count; |
378 |
> |
if (n > items.length || origin < 0) |
379 |
|
equal = false; |
380 |
|
else { |
381 |
+ |
equal = true; |
382 |
+ |
int fence = bound < 0 || bound > n ? n : bound; |
383 |
|
Iterator<?> it = list.iterator(); |
384 |
|
for (int i = origin; i < fence; ++i) { |
385 |
< |
if (!it.hasNext()) { |
386 |
< |
equal = false; |
387 |
< |
break; |
388 |
< |
} |
389 |
< |
Object x = it.next(); |
390 |
< |
Object y = items[i]; |
353 |
< |
if (x == null? y != null : (y == null || !x.equals(y))) { |
385 |
> |
Object x = items[i]; |
386 |
> |
Object y; |
387 |
> |
if ((!locked && lock.getSequence() != seq) || |
388 |
> |
!it.hasNext() || |
389 |
> |
(y = it.next()) == null ? |
390 |
> |
x != null : !y.equals(x)) { |
391 |
|
equal = false; |
392 |
|
break; |
393 |
|
} |
407 |
|
return equal; |
408 |
|
} |
409 |
|
|
410 |
< |
final int internalHashCode(int origin, int span) { |
410 |
> |
final int internalHashCode(int origin, int bound) { |
411 |
|
SequenceLock lock = this.lock; |
412 |
|
int hash; |
413 |
|
boolean locked = false; |
417 |
|
long seq = lock.awaitAvailability(); |
418 |
|
Object[] items = array; |
419 |
|
int len = items.length; |
420 |
< |
int c = count; |
421 |
< |
if (c > len) |
420 |
> |
int n = count; |
421 |
> |
if (n > len) |
422 |
|
continue; |
423 |
< |
int fence = c; |
424 |
< |
if (span >= 0 && origin + span < fence) |
388 |
< |
fence = origin + span; |
389 |
< |
if (origin >= 0 && fence <= c) { |
423 |
> |
int fence = bound < 0 || bound > n ? n : bound; |
424 |
> |
if (origin >= 0) { |
425 |
|
for (int i = origin; i < fence; ++i) { |
426 |
|
Object e = items[i]; |
427 |
|
hash = 31*hash + (e == null ? 0 : e.hashCode()); |
439 |
|
return hash; |
440 |
|
} |
441 |
|
|
442 |
< |
final String internalToString(int origin, int span) { |
442 |
> |
final String internalToString(int origin, int bound) { |
443 |
|
SequenceLock lock = this.lock; |
444 |
|
String ret; |
445 |
|
boolean locked = false; |
446 |
|
try { |
447 |
< |
for (;;) { |
447 |
> |
outer:for (;;) { |
448 |
|
long seq = lock.awaitAvailability(); |
449 |
|
Object[] items = array; |
450 |
|
int len = items.length; |
451 |
< |
int c = count; |
452 |
< |
if (c > len) |
451 |
> |
int n = count; |
452 |
> |
if (n > len) |
453 |
|
continue; |
454 |
< |
int fence = c; |
455 |
< |
if (span >= 0 && origin + span < fence) |
456 |
< |
fence = origin + span; |
457 |
< |
if (origin >= 0 && fence <= c) { |
458 |
< |
if (origin == fence) |
459 |
< |
ret = "[]"; |
460 |
< |
else { |
461 |
< |
StringBuilder sb = new StringBuilder(); |
462 |
< |
sb.append('['); |
463 |
< |
for (int i = origin;;) { |
464 |
< |
Object e = items[i]; |
465 |
< |
sb.append(e == this ? "(this Collection)" : e); |
466 |
< |
if (++i < fence) |
467 |
< |
sb.append(',').append(' '); |
468 |
< |
else { |
469 |
< |
ret = sb.append(']').toString(); |
470 |
< |
break; |
471 |
< |
} |
454 |
> |
int fence = bound < 0 || bound > n ? n : bound; |
455 |
> |
if (origin < 0 || origin == fence) |
456 |
> |
ret = "[]"; |
457 |
> |
else { |
458 |
> |
StringBuilder sb = new StringBuilder(); |
459 |
> |
sb.append('['); |
460 |
> |
for (int i = origin;;) { |
461 |
> |
Object e = items[i]; |
462 |
> |
if (e == this) |
463 |
> |
sb.append("(this Collection)"); |
464 |
> |
else if (!locked && lock.getSequence() != seq) |
465 |
> |
continue outer; |
466 |
> |
else |
467 |
> |
sb.append(e.toString()); |
468 |
> |
if (++i < fence) |
469 |
> |
sb.append(',').append(' '); |
470 |
> |
else { |
471 |
> |
ret = sb.append(']').toString(); |
472 |
> |
break; |
473 |
|
} |
474 |
|
} |
439 |
– |
if (lock.getSequence() == seq) |
440 |
– |
break; |
475 |
|
} |
476 |
+ |
if (lock.getSequence() == seq) |
477 |
+ |
break; |
478 |
|
lock.lock(); |
479 |
|
locked = true; |
480 |
|
} |
485 |
|
return ret; |
486 |
|
} |
487 |
|
|
488 |
< |
final Object[] internalToArray(int origin, int span) { |
488 |
> |
final Object[] internalToArray(int origin, int bound) { |
489 |
|
Object[] result; |
490 |
|
SequenceLock lock = this.lock; |
491 |
|
boolean locked = false; |
495 |
|
long seq = lock.awaitAvailability(); |
496 |
|
Object[] items = array; |
497 |
|
int len = items.length; |
498 |
< |
int c = count; |
499 |
< |
int fence = c; |
500 |
< |
if (span >= 0 && origin + span < fence) |
501 |
< |
fence = origin + span; |
502 |
< |
if (c <= len && fence <= len) { |
498 |
> |
int n = count; |
499 |
> |
if (n > len) |
500 |
> |
continue; |
501 |
> |
int fence = bound < 0 || bound > n ? n : bound; |
502 |
> |
if (origin >= 0) |
503 |
|
result = Arrays.copyOfRange(items, origin, fence, |
504 |
|
Object[].class); |
505 |
< |
if (lock.getSequence() == seq) |
506 |
< |
break; |
471 |
< |
} |
505 |
> |
if (lock.getSequence() == seq) |
506 |
> |
break; |
507 |
|
lock.lock(); |
508 |
|
locked = true; |
509 |
|
} |
514 |
|
return result; |
515 |
|
} |
516 |
|
|
517 |
< |
final <T> T[] internalToArray(T[] a, int origin, int span) { |
517 |
> |
final <T> T[] internalToArray(T[] a, int origin, int bound) { |
518 |
> |
int alen = a.length; |
519 |
|
T[] result; |
520 |
|
SequenceLock lock = this.lock; |
521 |
|
boolean locked = false; |
524 |
|
long seq = lock.awaitAvailability(); |
525 |
|
Object[] items = array; |
526 |
|
int len = items.length; |
527 |
< |
int c = count; |
528 |
< |
int fence = c; |
529 |
< |
if (span >= 0 && origin + span < fence) |
530 |
< |
fence = origin + span; |
531 |
< |
if (c <= len && fence <= len) { |
532 |
< |
if (a.length < count) |
533 |
< |
result = (T[]) Arrays.copyOfRange(array, origin, |
534 |
< |
fence, a.getClass()); |
535 |
< |
else { |
536 |
< |
int n = fence - origin; |
537 |
< |
System.arraycopy(array, 0, a, origin, fence - origin); |
538 |
< |
if (a.length > n) |
539 |
< |
a[n] = null; |
504 |
< |
result = a; |
505 |
< |
} |
506 |
< |
if (lock.getSequence() == seq) |
507 |
< |
break; |
527 |
> |
int n = count; |
528 |
> |
if (n > len) |
529 |
> |
continue; |
530 |
> |
int fence = bound < 0 || bound > n ? n : bound; |
531 |
> |
int rlen = fence - origin; |
532 |
> |
if (rlen < 0) |
533 |
> |
rlen = 0; |
534 |
> |
if (origin < 0 || alen >= rlen) { |
535 |
> |
if (rlen > 0) |
536 |
> |
System.arraycopy(items, 0, a, origin, rlen); |
537 |
> |
if (alen > rlen) |
538 |
> |
a[rlen] = null; |
539 |
> |
result = a; |
540 |
|
} |
541 |
+ |
else |
542 |
+ |
result = (T[]) Arrays.copyOfRange(items, origin, |
543 |
+ |
fence, a.getClass()); |
544 |
+ |
if (lock.getSequence() == seq) |
545 |
+ |
break; |
546 |
|
lock.lock(); |
547 |
|
locked = true; |
548 |
|
} |
559 |
|
SequenceLock lock = this.lock; |
560 |
|
lock.lock(); |
561 |
|
try { |
562 |
< |
internalAdd(e); |
562 |
> |
rawAdd(e); |
563 |
|
} finally { |
564 |
|
lock.unlock(); |
565 |
|
} |
570 |
|
SequenceLock lock = this.lock; |
571 |
|
lock.lock(); |
572 |
|
try { |
573 |
< |
internalAddAt(index, element); |
573 |
> |
rawAddAt(index, element); |
574 |
|
} finally { |
575 |
|
lock.unlock(); |
576 |
|
} |
601 |
|
Object[] elements = c.toArray(); |
602 |
|
lock.lock(); |
603 |
|
try { |
604 |
< |
ret = internalAddAllAt(index, elements); |
604 |
> |
ret = rawAddAllAt(index, elements); |
605 |
|
} finally { |
606 |
|
lock.unlock(); |
607 |
|
} |
612 |
|
SequenceLock lock = this.lock; |
613 |
|
lock.lock(); |
614 |
|
try { |
615 |
+ |
Object[] items = array; |
616 |
|
for (int i = 0; i < count; i++) |
617 |
< |
array[i] = null; |
617 |
> |
items[i] = null; |
618 |
|
count = 0; |
619 |
|
} finally { |
620 |
|
lock.unlock(); |
634 |
|
return true; |
635 |
|
if (!(o instanceof List)) |
636 |
|
return false; |
637 |
< |
return internalEquals((List<?>)(o), 0, -1); |
637 |
> |
return internalEquals((List<?>)o, 0, -1); |
638 |
|
} |
639 |
|
|
640 |
|
public E get(int index) { |
642 |
|
for (;;) { |
643 |
|
long seq = lock.awaitAvailability(); |
644 |
|
Object[] items = array; |
645 |
< |
int len = items.length; |
646 |
< |
int c = count; |
609 |
< |
if (c > len) |
645 |
> |
int n = count; |
646 |
> |
if (n > items.length) |
647 |
|
continue; |
648 |
< |
E e; boolean ex; |
649 |
< |
if (index < 0 || index >= c) { |
648 |
> |
Object e; boolean ex; |
649 |
> |
if (index < 0 || index >= n) { |
650 |
|
e = null; |
651 |
|
ex = true; |
652 |
|
} |
653 |
|
else { |
654 |
< |
e = (E)items[index]; |
654 |
> |
e = items[index]; |
655 |
|
ex = false; |
656 |
|
} |
657 |
|
if (lock.getSequence() == seq) { |
658 |
|
if (ex) |
659 |
|
throw new ArrayIndexOutOfBoundsException(index); |
660 |
|
else |
661 |
< |
return e; |
661 |
> |
return (E)e; |
662 |
|
} |
663 |
|
} |
664 |
|
} |
669 |
|
|
670 |
|
public int indexOf(Object o) { |
671 |
|
SequenceLock lock = this.lock; |
672 |
< |
long seq = lock.awaitAvailability(); |
673 |
< |
Object[] items = array; |
674 |
< |
int c = count; |
675 |
< |
if (c <= items.length) { |
676 |
< |
int idx = internalIndexOf(o, items, 0, c); |
677 |
< |
if (lock.getSequence() == seq) |
678 |
< |
return idx; |
679 |
< |
} |
680 |
< |
lock.lock(); |
681 |
< |
try { |
682 |
< |
return internalIndexOf(o, array, 0, count); |
683 |
< |
} finally { |
684 |
< |
lock.unlock(); |
672 |
> |
for (;;) { |
673 |
> |
long seq = lock.awaitAvailability(); |
674 |
> |
Object[] items = array; |
675 |
> |
int n = count; |
676 |
> |
if (n <= items.length) { |
677 |
> |
for (int i = 0; i < n; ++i) { |
678 |
> |
Object e = items[i]; |
679 |
> |
if (lock.getSequence() != seq) { |
680 |
> |
lock.lock(); |
681 |
> |
try { |
682 |
> |
return rawIndexOf(o, 0, count); |
683 |
> |
} finally { |
684 |
> |
lock.unlock(); |
685 |
> |
} |
686 |
> |
} |
687 |
> |
else if ((o == null) ? e == null : o.equals(e)) |
688 |
> |
return i; |
689 |
> |
} |
690 |
> |
return -1; |
691 |
> |
} |
692 |
|
} |
693 |
|
} |
694 |
|
|
695 |
|
public boolean isEmpty() { |
652 |
– |
long ignore = lock.getSequence(); |
696 |
|
return count == 0; |
697 |
|
} |
698 |
|
|
699 |
|
public Iterator<E> iterator() { |
700 |
< |
return new Itr(this, 0); |
700 |
> |
return new Itr<E>(this, 0); |
701 |
|
} |
702 |
|
|
703 |
|
public int lastIndexOf(Object o) { |
704 |
|
SequenceLock lock = this.lock; |
705 |
< |
long seq = lock.awaitAvailability(); |
706 |
< |
Object[] items = array; |
707 |
< |
int c = count; |
708 |
< |
if (c <= items.length) { |
709 |
< |
int idx = internalLastIndexOf(o, items, c - 1, 0); |
710 |
< |
if (lock.getSequence() == seq) |
711 |
< |
return idx; |
712 |
< |
} |
713 |
< |
lock.lock(); |
714 |
< |
try { |
715 |
< |
return internalLastIndexOf(o, array, count-1, 0); |
716 |
< |
} finally { |
717 |
< |
lock.unlock(); |
705 |
> |
for (;;) { |
706 |
> |
long seq = lock.awaitAvailability(); |
707 |
> |
Object[] items = array; |
708 |
> |
int n = count; |
709 |
> |
if (n <= items.length) { |
710 |
> |
for (int i = n - 1; i >= 0; --i) { |
711 |
> |
Object e = items[i]; |
712 |
> |
if (lock.getSequence() != seq) { |
713 |
> |
lock.lock(); |
714 |
> |
try { |
715 |
> |
return rawLastIndexOf(o, 0, count); |
716 |
> |
} finally { |
717 |
> |
lock.unlock(); |
718 |
> |
} |
719 |
> |
} |
720 |
> |
else if ((o == null) ? e == null : o.equals(e)) |
721 |
> |
return i; |
722 |
> |
} |
723 |
> |
return -1; |
724 |
> |
} |
725 |
|
} |
726 |
|
} |
727 |
|
|
728 |
|
public ListIterator<E> listIterator() { |
729 |
< |
return new Itr(this, 0); |
729 |
> |
return new Itr<E>(this, 0); |
730 |
|
} |
731 |
|
|
732 |
|
public ListIterator<E> listIterator(int index) { |
733 |
< |
return new Itr(this, index); |
733 |
> |
return new Itr<E>(this, index); |
734 |
|
} |
735 |
|
|
736 |
|
public E remove(int index) { |
737 |
|
SequenceLock lock = this.lock; |
738 |
< |
E oldValue; |
738 |
> |
Object oldValue; |
739 |
|
lock.lock(); |
740 |
|
try { |
741 |
|
if (index < 0 || index >= count) |
742 |
|
throw new ArrayIndexOutOfBoundsException(index); |
743 |
< |
oldValue = (E)array[index]; |
744 |
< |
internalRemoveAt(index); |
743 |
> |
oldValue = array[index]; |
744 |
> |
rawRemoveAt(index); |
745 |
|
} finally { |
746 |
|
lock.unlock(); |
747 |
|
} |
748 |
< |
return oldValue; |
748 |
> |
return (E)oldValue; |
749 |
|
} |
750 |
|
|
751 |
|
public boolean remove(Object o) { |
753 |
|
boolean removed; |
754 |
|
lock.lock(); |
755 |
|
try { |
756 |
< |
removed = internalRemoveAt(internalIndexOf(o, array, 0, count)); |
756 |
> |
removed = rawRemoveAt(rawIndexOf(o, 0, count)); |
757 |
|
} finally { |
758 |
|
lock.unlock(); |
759 |
|
} |
769 |
|
} |
770 |
|
|
771 |
|
public E set(int index, E element) { |
772 |
< |
E oldValue; |
772 |
> |
Object oldValue; |
773 |
|
SequenceLock lock = this.lock; |
774 |
|
lock.lock(); |
775 |
|
try { |
776 |
+ |
Object[] items = array; |
777 |
|
if (index < 0 || index >= count) |
778 |
|
throw new ArrayIndexOutOfBoundsException(index); |
779 |
< |
oldValue = (E)array[index]; |
780 |
< |
array[index] = element; |
779 |
> |
oldValue = items[index]; |
780 |
> |
items[index] = element; |
781 |
|
} finally { |
782 |
|
lock.unlock(); |
783 |
|
} |
784 |
< |
return oldValue; |
784 |
> |
return (E)oldValue; |
785 |
|
} |
786 |
|
|
787 |
|
public int size() { |
737 |
– |
long ignore = lock.getSequence(); |
788 |
|
return count; |
789 |
|
} |
790 |
|
|
793 |
|
int ssize = toIndex - fromIndex; |
794 |
|
if (fromIndex < 0 || toIndex > c || ssize < 0) |
795 |
|
throw new IndexOutOfBoundsException(); |
796 |
< |
return new ReadMostlyVectorSublist(this, fromIndex, ssize); |
796 |
> |
return new ReadMostlyVectorSublist<E>(this, fromIndex, ssize); |
797 |
|
} |
798 |
|
|
799 |
|
public Object[] toArray() { |
814 |
|
* Append the element if not present. |
815 |
|
* |
816 |
|
* @param e element to be added to this list, if absent |
817 |
< |
* @return <tt>true</tt> if the element was added |
817 |
> |
* @return {@code true} if the element was added |
818 |
|
*/ |
819 |
|
public boolean addIfAbsent(E e) { |
820 |
|
boolean added; |
821 |
|
SequenceLock lock = this.lock; |
822 |
|
lock.lock(); |
823 |
|
try { |
824 |
< |
if (internalIndexOf(e, array, 0, count) < 0) { |
825 |
< |
internalAdd(e); |
824 |
> |
if (rawIndexOf(e, 0, count) < 0) { |
825 |
> |
rawAdd(e); |
826 |
|
added = true; |
827 |
|
} |
828 |
|
else |
853 |
|
try { |
854 |
|
for (int i = 0; i < clen; ++i) { |
855 |
|
Object e = cs[i]; |
856 |
< |
if (internalIndexOf(e, array, 0, count) < 0) { |
857 |
< |
internalAdd((E)e); |
856 |
> |
if (rawIndexOf(e, 0, count) < 0) { |
857 |
> |
rawAdd(e); |
858 |
|
++added; |
859 |
|
} |
860 |
|
} |
865 |
|
return added; |
866 |
|
} |
867 |
|
|
868 |
+ |
/** |
869 |
+ |
* Returns an iterator operating over a snapshot copy of the |
870 |
+ |
* elements of this collection created upon construction of the |
871 |
+ |
* iterator. The iterator does <em>NOT</em> support the |
872 |
+ |
* {@code remove} method. |
873 |
+ |
* |
874 |
+ |
* @return an iterator over the elements in this list in proper sequence |
875 |
+ |
*/ |
876 |
+ |
public Iterator<E> snapshotIterator() { |
877 |
+ |
return new SnapshotIterator<E>(this); |
878 |
+ |
} |
879 |
+ |
|
880 |
+ |
static final class SnapshotIterator<E> implements Iterator<E> { |
881 |
+ |
final Object[] items; |
882 |
+ |
int cursor; |
883 |
+ |
SnapshotIterator(ReadMostlyVector<E> v) { items = v.toArray(); } |
884 |
+ |
public boolean hasNext() { return cursor < items.length; } |
885 |
+ |
public E next() { |
886 |
+ |
if (cursor < items.length) |
887 |
+ |
return (E) items[cursor++]; |
888 |
+ |
throw new NoSuchElementException(); |
889 |
+ |
} |
890 |
+ |
public void remove() { throw new UnsupportedOperationException() ; } |
891 |
+ |
} |
892 |
+ |
|
893 |
|
// Vector-only methods |
894 |
|
|
895 |
|
/** See {@link Vector#firstElement} */ |
899 |
|
long seq = lock.awaitAvailability(); |
900 |
|
Object[] items = array; |
901 |
|
int len = items.length; |
902 |
< |
int c = count; |
903 |
< |
if (c > len || c < 0) |
902 |
> |
int n = count; |
903 |
> |
if (n > len) |
904 |
|
continue; |
905 |
< |
E e; boolean ex; |
906 |
< |
if (c == 0) { |
907 |
< |
e = null; |
908 |
< |
ex = true; |
905 |
> |
Object e; boolean ex; |
906 |
> |
if (n > 0) { |
907 |
> |
e = items[0]; |
908 |
> |
ex = false; |
909 |
|
} |
910 |
|
else { |
911 |
< |
e = (E)items[0]; |
912 |
< |
ex = false; |
911 |
> |
e = null; |
912 |
> |
ex = true; |
913 |
|
} |
914 |
|
if (lock.getSequence() == seq) { |
915 |
|
if (ex) |
916 |
|
throw new NoSuchElementException(); |
917 |
|
else |
918 |
< |
return e; |
918 |
> |
return (E)e; |
919 |
|
} |
920 |
|
} |
921 |
|
} |
927 |
|
long seq = lock.awaitAvailability(); |
928 |
|
Object[] items = array; |
929 |
|
int len = items.length; |
930 |
< |
int c = count; |
931 |
< |
if (c > len || c < 0) |
930 |
> |
int n = count; |
931 |
> |
if (n > len) |
932 |
|
continue; |
933 |
< |
E e; boolean ex; |
934 |
< |
if (c == 0) { |
935 |
< |
e = null; |
936 |
< |
ex = true; |
933 |
> |
Object e; boolean ex; |
934 |
> |
if (n > 0) { |
935 |
> |
e = items[n - 1]; |
936 |
> |
ex = false; |
937 |
|
} |
938 |
|
else { |
939 |
< |
e = (E)items[c - 1]; |
940 |
< |
ex = false; |
939 |
> |
e = null; |
940 |
> |
ex = true; |
941 |
|
} |
942 |
|
if (lock.getSequence() == seq) { |
943 |
|
if (ex) |
944 |
|
throw new NoSuchElementException(); |
945 |
|
else |
946 |
< |
return e; |
946 |
> |
return (E)e; |
947 |
|
} |
948 |
|
} |
949 |
|
} |
955 |
|
boolean ex = false; |
956 |
|
long seq = lock.awaitAvailability(); |
957 |
|
Object[] items = array; |
958 |
< |
int c = count; |
958 |
> |
int n = count; |
959 |
|
boolean retry = false; |
960 |
< |
if (c > items.length) |
960 |
> |
if (n > items.length) |
961 |
|
retry = true; |
962 |
|
else if (index < 0) |
963 |
|
ex = true; |
964 |
|
else |
965 |
< |
idx = internalIndexOf(o, items, index, c); |
965 |
> |
idx = validatedIndexOf(o, items, index, n, seq); |
966 |
|
if (retry || lock.getSequence() != seq) { |
967 |
|
lock.lock(); |
968 |
|
try { |
969 |
|
if (index < 0) |
970 |
|
ex = true; |
971 |
|
else |
972 |
< |
idx = internalIndexOf(o, array, 0, count); |
972 |
> |
idx = rawIndexOf(o, 0, count); |
973 |
|
} finally { |
974 |
|
lock.unlock(); |
975 |
|
} |
986 |
|
boolean ex = false; |
987 |
|
long seq = lock.awaitAvailability(); |
988 |
|
Object[] items = array; |
989 |
< |
int c = count; |
989 |
> |
int n = count; |
990 |
|
boolean retry = false; |
991 |
< |
if (c > items.length) |
991 |
> |
if (n > items.length) |
992 |
|
retry = true; |
993 |
< |
else if (index >= c) |
993 |
> |
else if (index >= n) |
994 |
|
ex = true; |
995 |
|
else |
996 |
< |
idx = internalLastIndexOf(o, items, index, 0); |
996 |
> |
idx = validatedLastIndexOf(o, items, index, 0, seq); |
997 |
|
if (retry || lock.getSequence() != seq) { |
998 |
|
lock.lock(); |
999 |
|
try { |
1000 |
|
if (index >= count) |
1001 |
|
ex = true; |
1002 |
|
else |
1003 |
< |
idx = internalLastIndexOf(o, array, index, 0); |
1003 |
> |
idx = rawLastIndexOf(o, index, 0); |
1004 |
|
} finally { |
1005 |
|
lock.unlock(); |
1006 |
|
} |
1017 |
|
SequenceLock lock = this.lock; |
1018 |
|
lock.lock(); |
1019 |
|
try { |
1020 |
< |
int c = count; |
1021 |
< |
if (newSize > c) |
1020 |
> |
int n = count; |
1021 |
> |
if (newSize > n) |
1022 |
|
grow(newSize); |
1023 |
|
else { |
1024 |
< |
for (int i = newSize ; i < c ; i++) |
1025 |
< |
array[i] = null; |
1024 |
> |
Object[] items = array; |
1025 |
> |
for (int i = newSize ; i < n ; i++) |
1026 |
> |
items[i] = null; |
1027 |
|
} |
1028 |
|
count = newSize; |
1029 |
|
} finally { |
1047 |
|
SequenceLock lock = this.lock; |
1048 |
|
lock.lock(); |
1049 |
|
try { |
1050 |
< |
if (count < array.length) |
1051 |
< |
array = Arrays.copyOf(array, count); |
1050 |
> |
Object[] items = array; |
1051 |
> |
if (count < items.length) |
1052 |
> |
array = Arrays.copyOf(items, count); |
1053 |
|
} finally { |
1054 |
|
lock.unlock(); |
1055 |
|
} |
1071 |
|
|
1072 |
|
/** See {@link Vector#elements} */ |
1073 |
|
public Enumeration<E> elements() { |
1074 |
< |
return new Itr(this, 0); |
1074 |
> |
return new Itr<E>(this, 0); |
1075 |
|
} |
1076 |
|
|
1077 |
|
/** See {@link Vector#capacity} */ |
1078 |
|
public int capacity() { |
1002 |
– |
long ignore = lock.getSequence(); |
1079 |
|
return array.length; |
1080 |
|
} |
1081 |
|
|
1116 |
|
|
1117 |
|
// other methods |
1118 |
|
|
1119 |
< |
public Object clone() { |
1119 |
> |
public ReadMostlyVector<E> clone() { |
1120 |
|
SequenceLock lock = this.lock; |
1121 |
|
Object[] a = null; |
1046 |
– |
int c; |
1122 |
|
boolean retry = false; |
1123 |
|
long seq = lock.awaitAvailability(); |
1124 |
|
Object[] items = array; |
1125 |
< |
c = count; |
1126 |
< |
if (c <= items.length) |
1127 |
< |
a = Arrays.copyOf(items, c); |
1125 |
> |
int n = count; |
1126 |
> |
if (n <= items.length) |
1127 |
> |
a = Arrays.copyOf(items, n); |
1128 |
|
else |
1129 |
|
retry = true; |
1130 |
|
if (retry || lock.getSequence() != seq) { |
1131 |
|
lock.lock(); |
1132 |
|
try { |
1133 |
< |
c = count; |
1134 |
< |
a = Arrays.copyOf(array, c); |
1133 |
> |
n = count; |
1134 |
> |
a = Arrays.copyOf(array, n); |
1135 |
|
} finally { |
1136 |
|
lock.unlock(); |
1137 |
|
} |
1138 |
|
} |
1139 |
< |
return new ReadMostlyVector(a, c, capacityIncrement); |
1139 |
> |
return new ReadMostlyVector<E>(a, n, capacityIncrement); |
1140 |
|
} |
1141 |
|
|
1142 |
|
private void writeObject(java.io.ObjectOutputStream s) |
1159 |
|
int cursor; |
1160 |
|
int fence; |
1161 |
|
int lastRet; |
1162 |
< |
boolean haveNext, havePrev; |
1162 |
> |
boolean validNext, validPrev; |
1163 |
|
|
1164 |
|
Itr(ReadMostlyVector<E> list, int index) { |
1165 |
|
this.list = list; |
1172 |
|
} |
1173 |
|
|
1174 |
|
private void refresh() { |
1175 |
+ |
validNext = validPrev = false; |
1176 |
|
do { |
1177 |
|
seq = lock.awaitAvailability(); |
1178 |
|
items = list.array; |
1179 |
< |
fence = list.count; |
1180 |
< |
} while (lock.getSequence() != seq); |
1179 |
> |
} while ((fence = list.count) > items.length || |
1180 |
> |
lock.getSequence() != seq); |
1181 |
|
} |
1182 |
|
|
1183 |
|
public boolean hasNext() { |
1184 |
+ |
boolean valid; |
1185 |
|
int i = cursor; |
1186 |
< |
while (i < fence && i >= 0) { |
1186 |
> |
for (;;) { |
1187 |
> |
if (i >= fence || i < 0 || i >= items.length) { |
1188 |
> |
valid = false; |
1189 |
> |
break; |
1190 |
> |
} |
1191 |
> |
next = items[i]; |
1192 |
|
if (lock.getSequence() == seq) { |
1193 |
< |
next = items[i]; |
1194 |
< |
return haveNext = true; |
1193 |
> |
valid = true; |
1194 |
> |
break; |
1195 |
|
} |
1196 |
|
refresh(); |
1197 |
|
} |
1198 |
< |
return false; |
1198 |
> |
return validNext = valid; |
1199 |
|
} |
1200 |
|
|
1201 |
|
public boolean hasPrevious() { |
1202 |
< |
int i = cursor; |
1203 |
< |
while (i <= fence && i > 0) { |
1202 |
> |
boolean valid; |
1203 |
> |
int i = cursor - 1; |
1204 |
> |
for (;;) { |
1205 |
> |
if (i >= fence || i < 0 || i >= items.length) { |
1206 |
> |
valid = false; |
1207 |
> |
break; |
1208 |
> |
} |
1209 |
> |
prev = items[i]; |
1210 |
|
if (lock.getSequence() == seq) { |
1211 |
< |
prev = items[i - 1]; |
1212 |
< |
return havePrev = true; |
1211 |
> |
valid = true; |
1212 |
> |
break; |
1213 |
|
} |
1214 |
|
refresh(); |
1215 |
|
} |
1216 |
< |
return false; |
1216 |
> |
return validPrev = valid; |
1217 |
|
} |
1218 |
|
|
1219 |
|
public E next() { |
1220 |
< |
if (!haveNext && !hasNext()) |
1221 |
< |
throw new NoSuchElementException(); |
1222 |
< |
haveNext = false; |
1223 |
< |
lastRet = cursor++; |
1224 |
< |
return (E) next; |
1220 |
> |
if (validNext || hasNext()) { |
1221 |
> |
validNext = false; |
1222 |
> |
lastRet = cursor++; |
1223 |
> |
return (E) next; |
1224 |
> |
} |
1225 |
> |
throw new NoSuchElementException(); |
1226 |
|
} |
1227 |
|
|
1228 |
|
public E previous() { |
1229 |
< |
if (!havePrev && !hasPrevious()) |
1230 |
< |
throw new NoSuchElementException(); |
1231 |
< |
havePrev = false; |
1232 |
< |
lastRet = cursor--; |
1233 |
< |
return (E) prev; |
1229 |
> |
if (validPrev || hasPrevious()) { |
1230 |
> |
validPrev = false; |
1231 |
> |
lastRet = cursor--; |
1232 |
> |
return (E) prev; |
1233 |
> |
} |
1234 |
> |
throw new NoSuchElementException(); |
1235 |
|
} |
1236 |
|
|
1237 |
|
public void remove() { |
1307 |
|
lock.lock(); |
1308 |
|
try { |
1309 |
|
int c = size; |
1310 |
< |
list.internalAddAt(c + offset, element); |
1310 |
> |
list.rawAddAt(c + offset, element); |
1311 |
|
size = c + 1; |
1312 |
|
} finally { |
1313 |
|
lock.unlock(); |
1321 |
|
try { |
1322 |
|
if (index < 0 || index > size) |
1323 |
|
throw new ArrayIndexOutOfBoundsException(index); |
1324 |
< |
list.internalAddAt(index + offset, element); |
1324 |
> |
list.rawAddAt(index + offset, element); |
1325 |
|
++size; |
1326 |
|
} finally { |
1327 |
|
lock.unlock(); |
1336 |
|
try { |
1337 |
|
int s = size; |
1338 |
|
int pc = list.count; |
1339 |
< |
list.internalAddAllAt(offset + s, elements); |
1339 |
> |
list.rawAddAllAt(offset + s, elements); |
1340 |
|
added = list.count - pc; |
1341 |
|
size = s + added; |
1342 |
|
} finally { |
1355 |
|
if (index < 0 || index > s) |
1356 |
|
throw new ArrayIndexOutOfBoundsException(index); |
1357 |
|
int pc = list.count; |
1358 |
< |
list.internalAddAllAt(index + offset, elements); |
1358 |
> |
list.rawAddAllAt(index + offset, elements); |
1359 |
|
added = list.count - pc; |
1360 |
|
size = s + added; |
1361 |
|
} finally { |
1368 |
|
SequenceLock lock = list.lock; |
1369 |
|
lock.lock(); |
1370 |
|
try { |
1371 |
< |
list.internalClear(offset, size); |
1371 |
> |
list.internalClear(offset, offset + size); |
1372 |
|
size = 0; |
1373 |
|
} finally { |
1374 |
|
lock.unlock(); |
1380 |
|
} |
1381 |
|
|
1382 |
|
public boolean containsAll(Collection<?> c) { |
1383 |
< |
return list.internalContainsAll(c, offset, size); |
1383 |
> |
return list.internalContainsAll(c, offset, offset + size); |
1384 |
|
} |
1385 |
|
|
1386 |
|
public boolean equals(Object o) { |
1388 |
|
return true; |
1389 |
|
if (!(o instanceof List)) |
1390 |
|
return false; |
1391 |
< |
return list.internalEquals((List<?>)(o), offset, size); |
1391 |
> |
return list.internalEquals((List<?>)(o), offset, offset + size); |
1392 |
|
} |
1393 |
|
|
1394 |
|
public E get(int index) { |
1398 |
|
} |
1399 |
|
|
1400 |
|
public int hashCode() { |
1401 |
< |
return list.internalHashCode(offset, size); |
1401 |
> |
return list.internalHashCode(offset, offset + size); |
1402 |
|
} |
1403 |
|
|
1404 |
|
public int indexOf(Object o) { |
1407 |
|
Object[] items = list.array; |
1408 |
|
int c = list.count; |
1409 |
|
if (c <= items.length) { |
1410 |
< |
int idx = internalIndexOf(o, items, offset, offset+size); |
1410 |
> |
int idx = list.validatedIndexOf(o, items, offset, |
1411 |
> |
offset + size, seq); |
1412 |
|
if (lock.getSequence() == seq) |
1413 |
|
return idx < 0 ? -1 : idx - offset; |
1414 |
|
} |
1415 |
|
lock.lock(); |
1416 |
|
try { |
1417 |
< |
int idx = internalIndexOf(o, list.array, offset, offset+size); |
1417 |
> |
int idx = list.rawIndexOf(o, offset, offset + size); |
1418 |
|
return idx < 0 ? -1 : idx - offset; |
1419 |
|
} finally { |
1420 |
|
lock.unlock(); |
1426 |
|
} |
1427 |
|
|
1428 |
|
public Iterator<E> iterator() { |
1429 |
< |
return new SubItr(this, offset); |
1429 |
> |
return new SubItr<E>(this, offset); |
1430 |
|
} |
1431 |
|
|
1432 |
|
public int lastIndexOf(Object o) { |
1435 |
|
Object[] items = list.array; |
1436 |
|
int c = list.count; |
1437 |
|
if (c <= items.length) { |
1438 |
< |
int idx = internalLastIndexOf(o, items, offset+size-1, offset); |
1438 |
> |
int idx = list.validatedLastIndexOf(o, items, offset+size-1, |
1439 |
> |
offset, seq); |
1440 |
|
if (lock.getSequence() == seq) |
1441 |
|
return idx < 0 ? -1 : idx - offset; |
1442 |
|
} |
1443 |
|
lock.lock(); |
1444 |
|
try { |
1445 |
< |
int idx = internalLastIndexOf(o, list.array, offset+size-1, |
1354 |
< |
offset); |
1445 |
> |
int idx = list.rawLastIndexOf(o, offset + size - 1, offset); |
1446 |
|
return idx < 0 ? -1 : idx - offset; |
1447 |
|
} finally { |
1448 |
|
lock.unlock(); |
1450 |
|
} |
1451 |
|
|
1452 |
|
public ListIterator<E> listIterator() { |
1453 |
< |
return new SubItr(this, offset); |
1453 |
> |
return new SubItr<E>(this, offset); |
1454 |
|
} |
1455 |
|
|
1456 |
|
public ListIterator<E> listIterator(int index) { |
1457 |
< |
return new SubItr(this, index + offset); |
1457 |
> |
return new SubItr<E>(this, index + offset); |
1458 |
|
} |
1459 |
|
|
1460 |
|
public E remove(int index) { |
1461 |
< |
E result; |
1461 |
> |
Object result; |
1462 |
|
SequenceLock lock = list.lock; |
1463 |
|
lock.lock(); |
1464 |
|
try { |
1465 |
< |
if (index < 0 || index >= size) |
1375 |
< |
throw new ArrayIndexOutOfBoundsException(index); |
1465 |
> |
Object[] items = list.array; |
1466 |
|
int i = index + offset; |
1467 |
< |
result = (E)list.array[i]; |
1468 |
< |
list.internalRemoveAt(i); |
1467 |
> |
if (index < 0 || index >= size || i >= items.length) |
1468 |
> |
throw new ArrayIndexOutOfBoundsException(index); |
1469 |
> |
result = items[i]; |
1470 |
> |
list.rawRemoveAt(i); |
1471 |
|
size--; |
1472 |
|
} finally { |
1473 |
|
lock.unlock(); |
1474 |
|
} |
1475 |
< |
return result; |
1475 |
> |
return (E)result; |
1476 |
|
} |
1477 |
|
|
1478 |
|
public boolean remove(Object o) { |
1480 |
|
SequenceLock lock = list.lock; |
1481 |
|
lock.lock(); |
1482 |
|
try { |
1483 |
< |
if (list.internalRemoveAt(internalIndexOf(o, list.array, offset, |
1484 |
< |
offset+size))) { |
1483 |
> |
if (list.rawRemoveAt(list.rawIndexOf(o, offset, |
1484 |
> |
offset + size))) { |
1485 |
|
removed = true; |
1486 |
|
--size; |
1487 |
|
} |
1492 |
|
} |
1493 |
|
|
1494 |
|
public boolean removeAll(Collection<?> c) { |
1495 |
< |
return list.internalRemoveAll(c, offset, size); |
1495 |
> |
return list.internalRemoveAll(c, offset, offset + size); |
1496 |
|
} |
1497 |
|
|
1498 |
|
public boolean retainAll(Collection<?> c) { |
1499 |
< |
return list.internalRetainAll(c, offset, size); |
1499 |
> |
return list.internalRetainAll(c, offset, offset + size); |
1500 |
|
} |
1501 |
|
|
1502 |
|
public E set(int index, E element) { |
1514 |
|
int ssize = toIndex - fromIndex; |
1515 |
|
if (fromIndex < 0 || toIndex > c || ssize < 0) |
1516 |
|
throw new IndexOutOfBoundsException(); |
1517 |
< |
return new ReadMostlyVectorSublist(list, offset+fromIndex, ssize); |
1517 |
> |
return new ReadMostlyVectorSublist<E>(list, offset+fromIndex, ssize); |
1518 |
|
} |
1519 |
|
|
1520 |
|
public Object[] toArray() { |
1521 |
< |
return list.internalToArray(offset, size); |
1521 |
> |
return list.internalToArray(offset, offset + size); |
1522 |
|
} |
1523 |
|
|
1524 |
|
public <T> T[] toArray(T[] a) { |
1525 |
< |
return list.internalToArray(a, offset, size); |
1525 |
> |
return list.internalToArray(a, offset, offset + size); |
1526 |
|
} |
1527 |
|
|
1528 |
|
public String toString() { |
1529 |
< |
return list.internalToString(offset, size); |
1529 |
> |
return list.internalToString(offset, offset + size); |
1530 |
|
} |
1531 |
|
|
1532 |
|
} |
1541 |
|
int cursor; |
1542 |
|
int fence; |
1543 |
|
int lastRet; |
1544 |
< |
boolean haveNext, havePrev; |
1544 |
> |
boolean validNext, validPrev; |
1545 |
|
|
1546 |
|
SubItr(ReadMostlyVectorSublist<E> sublist, int index) { |
1547 |
|
this.sublist = sublist; |
1555 |
|
} |
1556 |
|
|
1557 |
|
private void refresh() { |
1558 |
+ |
validNext = validPrev = false; |
1559 |
|
do { |
1560 |
+ |
int n; |
1561 |
|
seq = lock.awaitAvailability(); |
1562 |
|
items = list.array; |
1563 |
< |
int c = list.count; |
1563 |
> |
if ((n = list.count) > items.length) |
1564 |
> |
continue; |
1565 |
|
int b = sublist.offset + sublist.size; |
1566 |
< |
fence = b < c ? b : c; |
1566 |
> |
fence = b < n ? b : n; |
1567 |
|
} while (lock.getSequence() != seq); |
1568 |
|
} |
1569 |
|
|
1570 |
|
public boolean hasNext() { |
1571 |
+ |
boolean valid; |
1572 |
|
int i = cursor; |
1573 |
< |
while (i < fence && i >= 0) { |
1573 |
> |
for (;;) { |
1574 |
> |
if (i >= fence || i < 0 || i >= items.length) { |
1575 |
> |
valid = false; |
1576 |
> |
break; |
1577 |
> |
} |
1578 |
> |
next = items[i]; |
1579 |
|
if (lock.getSequence() == seq) { |
1580 |
< |
next = items[i]; |
1581 |
< |
return haveNext = true; |
1580 |
> |
valid = true; |
1581 |
> |
break; |
1582 |
|
} |
1583 |
|
refresh(); |
1584 |
|
} |
1585 |
< |
return false; |
1585 |
> |
return validNext = valid; |
1586 |
|
} |
1587 |
|
|
1588 |
|
public boolean hasPrevious() { |
1589 |
< |
int i = cursor; |
1590 |
< |
while (i <= fence && i > 0) { |
1589 |
> |
boolean valid; |
1590 |
> |
int i = cursor - 1; |
1591 |
> |
for (;;) { |
1592 |
> |
if (i >= fence || i < 0 || i >= items.length) { |
1593 |
> |
valid = false; |
1594 |
> |
break; |
1595 |
> |
} |
1596 |
> |
prev = items[i]; |
1597 |
|
if (lock.getSequence() == seq) { |
1598 |
< |
prev = items[i - 1]; |
1599 |
< |
return havePrev = true; |
1598 |
> |
valid = true; |
1599 |
> |
break; |
1600 |
|
} |
1601 |
|
refresh(); |
1602 |
|
} |
1603 |
< |
return false; |
1603 |
> |
return validPrev = valid; |
1604 |
|
} |
1605 |
|
|
1606 |
|
public E next() { |
1607 |
< |
if (!haveNext && !hasNext()) |
1608 |
< |
throw new NoSuchElementException(); |
1609 |
< |
haveNext = false; |
1610 |
< |
lastRet = cursor++; |
1611 |
< |
return (E) next; |
1607 |
> |
if (validNext || hasNext()) { |
1608 |
> |
validNext = false; |
1609 |
> |
lastRet = cursor++; |
1610 |
> |
return (E) next; |
1611 |
> |
} |
1612 |
> |
throw new NoSuchElementException(); |
1613 |
|
} |
1614 |
|
|
1615 |
|
public E previous() { |
1616 |
< |
if (!havePrev && !hasPrevious()) |
1617 |
< |
throw new NoSuchElementException(); |
1618 |
< |
havePrev = false; |
1619 |
< |
lastRet = cursor--; |
1620 |
< |
return (E) prev; |
1616 |
> |
if (validPrev || hasPrevious()) { |
1617 |
> |
validPrev = false; |
1618 |
> |
lastRet = cursor--; |
1619 |
> |
return (E) prev; |
1620 |
> |
} |
1621 |
> |
throw new NoSuchElementException(); |
1622 |
|
} |
1623 |
|
|
1624 |
|
public int nextIndex() { |