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1 | build 3.zip\build 3\MHLTH_YS_137_Source\JavaScript\resources\javaJDF-1.8.0\src\sun\nio\ch | SocketChannelImpl.java | Mon Jan 22 14:46:54 2018 UTC |
2 | build 3.zip\build 3\MHLTH_YS_137_Source\JavaScript\resources\javaJDF-1.8.0\src\sun\nio\ch | SocketChannelImpl.java | Wed Sep 12 17:45:58 2018 UTC |
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1 | /* | |
2 | * Copyrig ht (c) 200 0, 2013, O racle and/ or its aff iliates. A ll rights reserved. | |
3 | * DO NOT ALTER OR R EMOVE COPY RIGHT NOTI CES OR THI S FILE HEA DER. | |
4 | * | |
5 | * This co de is free software; you can r edistribut e it and/o r modify i t | |
6 | * under t he terms o f the GNU General Pu blic Licen se version 2 only, a s | |
7 | * publish ed by the Free Softw are Founda tion. Ora cle design ates this | |
8 | * particu lar file a s subject to the "Cl asspath" e xception a s provided | |
9 | * by Orac le in the LICENSE fi le that ac companied this code. | |
10 | * | |
11 | * This co de is dist ributed in the hope that it wi ll be usef ul, but WI THOUT | |
12 | * ANY WAR RANTY; wit hout even the implie d warranty of MERCHA NTABILITY or | |
13 | * FITNESS FOR A PAR TICULAR PU RPOSE. Se e the GNU General Pu blic Licen se | |
14 | * version 2 for mor e details (a copy is included in the LIC ENSE file that | |
15 | * accompa nied this code). | |
16 | * | |
17 | * You sho uld have r eceived a copy of th e GNU Gene ral Public License v ersion | |
18 | * 2 along with this work; if not, write to the Fr ee Softwar e Foundati on, | |
19 | * Inc., 5 1 Franklin St, Fifth Floor, Bo ston, MA 0 2110-1301 USA. | |
20 | * | |
21 | * Please contact Or acle, 500 Oracle Par kway, Redw ood Shores , CA 94065 USA | |
22 | * or visi t www.orac le.com if you need a dditional informatio n or have any | |
23 | * questio ns. | |
24 | */ | |
25 | ||
26 | package su n.nio.ch; | |
27 | ||
28 | import jav a.io.FileD escriptor; | |
29 | import jav a.io.IOExc eption; | |
30 | import jav a.net.*; | |
31 | import jav a.nio.Byte Buffer; | |
32 | import jav a.nio.chan nels.*; | |
33 | import jav a.nio.chan nels.spi.* ; | |
34 | import jav a.util.*; | |
35 | import sun .net.NetHo oks; | |
36 | import sun .net.Exten dedOptions Impl; | |
37 | ||
38 | ||
39 | /** | |
40 | * An impl ementation of Socket Channels | |
41 | */ | |
42 | ||
43 | class Sock etChannelI mpl | |
44 | extend s SocketCh annel | |
45 | implem ents SelCh Impl | |
46 | { | |
47 | ||
48 | // Use d to make native rea d and writ e calls | |
49 | privat e static N ativeDispa tcher nd; | |
50 | ||
51 | // Our file desc riptor obj ect | |
52 | privat e final Fi leDescript or fd; | |
53 | ||
54 | // fd value need ed for dev /poll. Thi s value wi ll remain valid | |
55 | // eve n after th e value in the file descriptor object ha s been set to -1 | |
56 | privat e final in t fdVal; | |
57 | ||
58 | // IDs of native threads d oing reads and write s, for sig nalling | |
59 | privat e volatile long read erThread = 0; | |
60 | privat e volatile long writ erThread = 0; | |
61 | ||
62 | // Loc k held by current re ading or c onnecting thread | |
63 | privat e final Ob ject readL ock = new Object(); | |
64 | ||
65 | // Loc k held by current wr iting or c onnecting thread | |
66 | privat e final Ob ject write Lock = new Object(); | |
67 | ||
68 | // Loc k held by any thread that modi fies the s tate field s declared below | |
69 | // DO NOT invoke a blockin g I/O oper ation whil e holding this lock! | |
70 | privat e final Ob ject state Lock = new Object(); | |
71 | ||
72 | // -- The follow ing fields are prote cted by st ateLock | |
73 | ||
74 | // set true when exclusive binding i s on and S O_REUSEADD R is emula ted | |
75 | privat e boolean isReuseAdd ress; | |
76 | ||
77 | // Sta te, increa ses monoto nically | |
78 | privat e static f inal int S T_UNINITIA LIZED = -1 ; | |
79 | privat e static f inal int S T_UNCONNEC TED = 0; | |
80 | privat e static f inal int S T_PENDING = 1; | |
81 | privat e static f inal int S T_CONNECTE D = 2; | |
82 | privat e static f inal int S T_KILLPEND ING = 3; | |
83 | privat e static f inal int S T_KILLED = 4; | |
84 | privat e int stat e = ST_UNI NITIALIZED ; | |
85 | ||
86 | // Bin ding | |
87 | privat e InetSock etAddress localAddre ss; | |
88 | privat e InetSock etAddress remoteAddr ess; | |
89 | ||
90 | // Inp ut/Output open | |
91 | privat e boolean isInputOpe n = true; | |
92 | privat e boolean isOutputOp en = true; | |
93 | privat e boolean readyToCon nect = fal se; | |
94 | ||
95 | // Soc ket adapto r, created on demand | |
96 | privat e Socket s ocket; | |
97 | ||
98 | // -- End of fie lds protec ted by sta teLock | |
99 | ||
100 | ||
101 | // Con structor f or normal connecting sockets | |
102 | // | |
103 | Socket ChannelImp l(Selector Provider s p) throws IOExceptio n { | |
104 | su per(sp); | |
105 | th is.fd = Ne t.socket(t rue); | |
106 | th is.fdVal = IOUtil.fd Val(fd); | |
107 | th is.state = ST_UNCONN ECTED; | |
108 | } | |
109 | ||
110 | Socket ChannelImp l(Selector Provider s p, | |
111 | FileDesc riptor fd, | |
112 | boolean bound) | |
113 | th rows IOExc eption | |
114 | { | |
115 | su per(sp); | |
116 | th is.fd = fd ; | |
117 | th is.fdVal = IOUtil.fd Val(fd); | |
118 | th is.state = ST_UNCONN ECTED; | |
119 | if (bound) | |
120 | this.loc alAddress = Net.loca lAddress(f d); | |
121 | } | |
122 | ||
123 | // Con structor f or sockets obtained from serve r sockets | |
124 | // | |
125 | Socket ChannelImp l(Selector Provider s p, | |
126 | FileDesc riptor fd, InetSocke tAddress r emote) | |
127 | th rows IOExc eption | |
128 | { | |
129 | su per(sp); | |
130 | th is.fd = fd ; | |
131 | th is.fdVal = IOUtil.fd Val(fd); | |
132 | th is.state = ST_CONNEC TED; | |
133 | th is.localAd dress = Ne t.localAdd ress(fd); | |
134 | th is.remoteA ddress = r emote; | |
135 | } | |
136 | ||
137 | public Socket so cket() { | |
138 | sy nchronized (stateLoc k) { | |
139 | if (sock et == null ) | |
140 | sock et = Socke tAdaptor.c reate(this ); | |
141 | return s ocket; | |
142 | } | |
143 | } | |
144 | ||
145 | @Overr ide | |
146 | public SocketAdd ress getLo calAddress () throws IOExceptio n { | |
147 | sy nchronized (stateLoc k) { | |
148 | if (!isO pen()) | |
149 | thro w new Clos edChannelE xception() ; | |
150 | return Net.getRev ealedLocal Address(lo calAddress ); | |
151 | } | |
152 | } | |
153 | ||
154 | @Overr ide | |
155 | public SocketAdd ress getRe moteAddres s() throws IOExcepti on { | |
156 | sy nchronized (stateLoc k) { | |
157 | if (!isO pen()) | |
158 | thro w new Clos edChannelE xception() ; | |
159 | return r emoteAddre ss; | |
160 | } | |
161 | } | |
162 | ||
163 | @Overr ide | |
164 | public <T> Socke tChannel s etOption(S ocketOptio n<T> name, T value) | |
165 | th rows IOExc eption | |
166 | { | |
167 | if (name == null) | |
168 | throw ne w NullPoin terExcepti on(); | |
169 | if (!support edOptions( ).contains (name)) | |
170 | throw ne w Unsuppor tedOperati onExceptio n("'" + na me + "' no t supporte d"); | |
171 | ||
172 | sy nchronized (stateLoc k) { | |
173 | if (!isO pen()) | |
174 | thro w new Clos edChannelE xception() ; | |
175 | ||
176 | if (name == Standa rdSocketOp tions.IP_T OS) { | |
177 | Prot ocolFamily family = Net.isIPv6 Available( ) ? | |
178 | StandardPr otocolFami ly.INET6 : StandardP rotocolFam ily.INET; | |
179 | Net. setSocketO ption(fd, family, na me, value) ; | |
180 | retu rn this; | |
181 | } | |
182 | ||
183 | if (name == Standa rdSocketOp tions.SO_R EUSEADDR & & Net.useE xclusiveBi nd()) { | |
184 | // S O_REUSEADD R emulated when usin g exclusiv e bind | |
185 | isRe useAddress = (Boolea n)value; | |
186 | retu rn this; | |
187 | } | |
188 | ||
189 | // no op tions that require s pecial han dling | |
190 | Net.setS ocketOptio n(fd, Net. UNSPEC, na me, value) ; | |
191 | return t his; | |
192 | } | |
193 | } | |
194 | ||
195 | @Overr ide | |
196 | @Suppr essWarning s("uncheck ed") | |
197 | public <T> T get Option(Soc ketOption< T> name) | |
198 | th rows IOExc eption | |
199 | { | |
200 | if (name == null) | |
201 | throw ne w NullPoin terExcepti on(); | |
202 | if (!support edOptions( ).contains (name)) | |
203 | throw ne w Unsuppor tedOperati onExceptio n("'" + na me + "' no t supporte d"); | |
204 | ||
205 | sy nchronized (stateLoc k) { | |
206 | if (!isO pen()) | |
207 | thro w new Clos edChannelE xception() ; | |
208 | ||
209 | if (name == Standa rdSocketOp tions.SO_R EUSEADDR & & | |
210 | Net.useExc lusiveBind ()) | |
211 | { | |
212 | // S O_REUSEADD R emulated when usin g exclusiv e bind | |
213 | retu rn (T)Bool ean.valueO f(isReuseA ddress); | |
214 | } | |
215 | ||
216 | // speci al handlin g for IP_T OS: always return 0 when IPv6 | |
217 | if (name == Standa rdSocketOp tions.IP_T OS) { | |
218 | Prot ocolFamily family = Net.isIPv6 Available( ) ? | |
219 | StandardPr otocolFami ly.INET6 : StandardP rotocolFam ily.INET; | |
220 | retu rn (T) Net .getSocket Option(fd, family, n ame); | |
221 | } | |
222 | ||
223 | // no op tions that require s pecial han dling | |
224 | return ( T) Net.get SocketOpti on(fd, Net .UNSPEC, n ame); | |
225 | } | |
226 | } | |
227 | ||
228 | privat e static c lass Defau ltOptionsH older { | |
229 | st atic final Set<Socke tOption<?> > defaultO ptions = d efaultOpti ons(); | |
230 | ||
231 | pr ivate stat ic Set<Soc ketOption< ?>> defaul tOptions() { | |
232 | HashSet< SocketOpti on<?>> set = new Has hSet<Socke tOption<?> >(8); | |
233 | set.add( StandardSo cketOption s.SO_SNDBU F); | |
234 | set.add( StandardSo cketOption s.SO_RCVBU F); | |
235 | set.add( StandardSo cketOption s.SO_KEEPA LIVE); | |
236 | set.add( StandardSo cketOption s.SO_REUSE ADDR); | |
237 | set.add( StandardSo cketOption s.SO_LINGE R); | |
238 | set.add( StandardSo cketOption s.TCP_NODE LAY); | |
239 | // addit ional opti ons requir ed by sock et adaptor | |
240 | set.add( StandardSo cketOption s.IP_TOS); | |
241 | set.add( ExtendedSo cketOption .SO_OOBINL INE); | |
242 | if (Exte ndedOption sImpl.flow Supported( )) { | |
243 | set. add(jdk.ne t.Extended SocketOpti ons.SO_FLO W_SLA); | |
244 | } | |
245 | return C ollections .unmodifia bleSet(set ); | |
246 | } | |
247 | } | |
248 | ||
249 | @Overr ide | |
250 | public final Set <SocketOpt ion<?>> su pportedOpt ions() { | |
251 | re turn Defau ltOptionsH older.defa ultOptions ; | |
252 | } | |
253 | ||
254 | privat e boolean ensureRead Open() thr ows Closed ChannelExc eption { | |
255 | sy nchronized (stateLoc k) { | |
256 | if (!isO pen()) | |
257 | thro w new Clos edChannelE xception() ; | |
258 | if (!isC onnected() ) | |
259 | thro w new NotY etConnecte dException (); | |
260 | if (!isI nputOpen) | |
261 | retu rn false; | |
262 | else | |
263 | retu rn true; | |
264 | } | |
265 | } | |
266 | ||
267 | privat e void ens ureWriteOp en() throw s ClosedCh annelExcep tion { | |
268 | sy nchronized (stateLoc k) { | |
269 | if (!isO pen()) | |
270 | thro w new Clos edChannelE xception() ; | |
271 | if (!isO utputOpen) | |
272 | thro w new Clos edChannelE xception() ; | |
273 | if (!isC onnected() ) | |
274 | thro w new NotY etConnecte dException (); | |
275 | } | |
276 | } | |
277 | ||
278 | privat e void rea derCleanup () throws IOExceptio n { | |
279 | sy nchronized (stateLoc k) { | |
280 | readerTh read = 0; | |
281 | if (stat e == ST_KI LLPENDING) | |
282 | kill (); | |
283 | } | |
284 | } | |
285 | ||
286 | privat e void wri terCleanup () throws IOExceptio n { | |
287 | sy nchronized (stateLoc k) { | |
288 | writerTh read = 0; | |
289 | if (stat e == ST_KI LLPENDING) | |
290 | kill (); | |
291 | } | |
292 | } | |
293 | ||
294 | public int read( ByteBuffer buf) thro ws IOExcep tion { | |
295 | ||
296 | if (buf == n ull) | |
297 | throw ne w NullPoin terExcepti on(); | |
298 | ||
299 | sy nchronized (readLock ) { | |
300 | if (!ens ureReadOpe n()) | |
301 | retu rn -1; | |
302 | int n = 0; | |
303 | try { | |
304 | ||
305 | // S et up the interrupti on machine ry; see | |
306 | // A bstractInt erruptible Channel fo r details | |
307 | // | |
308 | begi n(); | |
309 | ||
310 | sync hronized ( stateLock) { | |
311 | if (!isOpe n()) { | |
312 | // Either the curren t thread i s already interrupte d, so | |
313 | // begin() closed th e channel, or anothe r thread c losed the | |
314 | // channel since we checked it a few byt ecodes ago . In | |
315 | // either case the v alue retur ned here i s irreleva nt since | |
316 | // the inv ocation of end() in the finall y block wi ll throw | |
317 | // an appr opriate ex ception. | |
318 | // | |
319 | return 0; | |
320 | ||
321 | } | |
322 | ||
323 | // Save th is thread so that it can be si gnalled on those | |
324 | // platfor ms that re quire it | |
325 | // | |
326 | readerThre ad = Nativ eThread.cu rrent(); | |
327 | } | |
328 | ||
329 | // B etween the previous test of is Open() and the retur n of the | |
330 | // I OUtil.read invocatio n below, t his channe l might be closed | |
331 | // o r this thr ead might be interru pted. We rely upon the | |
332 | // i mplicit sy nchronizat ion point in the ker nel read() call to | |
333 | // m ake sure t hat the ri ght thing happens. In either case the | |
334 | // i mplCloseSe lectableCh annel meth od is ulti mately inv oked in | |
335 | // s ome other thread, so there are three pos sibilities : | |
336 | // | |
337 | // - implClo seSelectab leChannel( ) invokes nd.preClos e() | |
338 | // before this threa d invokes read(), in which cas e the | |
339 | // read re turns imme diately wi th either EOF or an error, | |
340 | // the lat ter of whi ch will ca use an IOE xception t o be | |
341 | // thrown. | |
342 | // | |
343 | // - implClo seSelectab leChannel( ) invokes nd.preClos e() after | |
344 | // this th read is bl ocked in r ead(). On some oper ating | |
345 | // systems (e.g., So laris and Windows) t his causes the read | |
346 | // to retu rn immedia tely with either EOF or an err or | |
347 | // indicat ion. | |
348 | // | |
349 | // - implClo seSelectab leChannel( ) invokes nd.preClos e() after | |
350 | // this th read is bl ocked in r ead() but the operat ing | |
351 | // system (e.g., Lin ux) doesn' t support preemptive close, | |
352 | // so impl CloseSelec tableChann el() proce eds to sig nal this | |
353 | // thread, thereby c ausing the read to r eturn imme diately | |
354 | // with IO Status.INT ERRUPTED. | |
355 | // | |
356 | // I n all thre e cases th e invocati on of end( ) in the f inally | |
357 | // c lause will notice th at the cha nnel has b een closed and | |
358 | // t hrow an ap propriate exception (Asynchron ousCloseEx ception | |
359 | // o r ClosedBy InterruptE xception) if necessa ry. | |
360 | // | |
361 | // * There is A fourth po ssibility. implClose Selectable Channel() | |
362 | // i nvokes nd. preClose() , signals reader/wri ter thred and quickl y | |
363 | // m oves on to nd.close( ) in kill( ), which d oes a real close. | |
364 | // T hen a thir d thread a ccepts a n ew connect ion, opens file or | |
365 | // w hatever th at causes the releas ed "fd" to be recycl ed. All | |
366 | // a bove happe ns just be tween our last isOpe n() check and the | |
367 | // n ext kernel read reac hed, with the recycl ed "fd". T he solutio n | |
368 | // i s to postp one the re al kill() if there i s a reader or/and | |
369 | // w riter thre ad(s) over there "wa iting", le ave the cl eanup/kill | |
370 | // t o the read er or writ er thread. (the preC lose() sti ll happens | |
371 | // s o the conn ection get s cut off as usual). | |
372 | // | |
373 | // F or socket channels t here is th e addition al wrinkle that | |
374 | // a synchronou s shutdown works muc h like asy nchronous close, | |
375 | // e xcept that the chann el is shut down rathe r than com pletely | |
376 | // c losed. Th is is anal ogous to t he first t wo cases a bove, | |
377 | // e xcept that the shutd own operat ion plays the role o f | |
378 | // n d.preClose (). | |
379 | for (;;) { | |
380 | n = IOUtil .read(fd, buf, -1, n d); | |
381 | if ((n == IOStatus.I NTERRUPTED ) && isOpe n()) { | |
382 | // The system ca ll was int errupted b ut the cha nnel | |
383 | // is still open , so retry | |
384 | contin ue; | |
385 | } | |
386 | return IOS tatus.norm alize(n); | |
387 | } | |
388 | ||
389 | } finall y { | |
390 | read erCleanup( ); // Clear r eader thre ad | |
391 | // T he end met hod, which is define d in our s uperclass | |
392 | // A bstractInt erruptible Channel, r esets the interrupti on | |
393 | // m achinery. If its ar gument is true then it returns | |
394 | // n ormally; o therwise i t checks t he interru pt and ope n state | |
395 | // o f this cha nnel and t hrows an a ppropriate exception if | |
396 | // n ecessary. | |
397 | // | |
398 | // S o, if we a ctually ma naged to d o any I/O in the abo ve try | |
399 | // b lock then we pass tr ue to the end method . We also pass | |
400 | // t rue if the channel w as in non- blocking m ode when t he I/O | |
401 | // o peration w as initiat ed but no data could be transf erred; | |
402 | // t his preven ts spuriou s exceptio ns from be ing thrown in the | |
403 | // r are event that a cha nnel is cl osed or a thread is | |
404 | // i nterrupted at the ex act moment that a no n-blocking I/O | |
405 | // r equest is made. | |
406 | // | |
407 | end( n > 0 || ( n == IOSta tus.UNAVAI LABLE)); | |
408 | ||
409 | // E xtra case for socket channels: Asynchron ous shutdo wn | |
410 | // | |
411 | sync hronized ( stateLock) { | |
412 | if ((n <= 0) && (!is InputOpen) ) | |
413 | return IOStatus. EOF; | |
414 | } | |
415 | ||
416 | asse rt IOStatu s.check(n) ; | |
417 | ||
418 | } | |
419 | } | |
420 | } | |
421 | ||
422 | public long read (ByteBuffe r[] dsts, int offset , int leng th) | |
423 | th rows IOExc eption | |
424 | { | |
425 | if ((offset < 0) || (l ength < 0) || (offse t > dsts.l ength - le ngth)) | |
426 | throw ne w IndexOut OfBoundsEx ception(); | |
427 | sy nchronized (readLock ) { | |
428 | if (!ens ureReadOpe n()) | |
429 | retu rn -1; | |
430 | long n = 0; | |
431 | try { | |
432 | begi n(); | |
433 | sync hronized ( stateLock) { | |
434 | if (!isOpe n()) | |
435 | return 0; | |
436 | readerThre ad = Nativ eThread.cu rrent(); | |
437 | } | |
438 | ||
439 | for (;;) { | |
440 | n = IOUtil .read(fd, dsts, offs et, length , nd); | |
441 | if ((n == IOStatus.I NTERRUPTED ) && isOpe n()) | |
442 | contin ue; | |
443 | return IOS tatus.norm alize(n); | |
444 | } | |
445 | } finall y { | |
446 | read erCleanup( ); | |
447 | end( n > 0 || ( n == IOSta tus.UNAVAI LABLE)); | |
448 | sync hronized ( stateLock) { | |
449 | if ((n <= 0) && (!is InputOpen) ) | |
450 | return IOStatus. EOF; | |
451 | } | |
452 | asse rt IOStatu s.check(n) ; | |
453 | } | |
454 | } | |
455 | } | |
456 | ||
457 | public int write (ByteBuffe r buf) thr ows IOExce ption { | |
458 | if (buf == n ull) | |
459 | throw ne w NullPoin terExcepti on(); | |
460 | sy nchronized (writeLoc k) { | |
461 | ensureWr iteOpen(); | |
462 | int n = 0; | |
463 | try { | |
464 | begi n(); | |
465 | sync hronized ( stateLock) { | |
466 | if (!isOpe n()) | |
467 | return 0; | |
468 | writerThre ad = Nativ eThread.cu rrent(); | |
469 | } | |
470 | for (;;) { | |
471 | n = IOUtil .write(fd, buf, -1, nd); | |
472 | if ((n == IOStatus.I NTERRUPTED ) && isOpe n()) | |
473 | contin ue; | |
474 | return IOS tatus.norm alize(n); | |
475 | } | |
476 | } finall y { | |
477 | writ erCleanup( ); | |
478 | end( n > 0 || ( n == IOSta tus.UNAVAI LABLE)); | |
479 | sync hronized ( stateLock) { | |
480 | if ((n <= 0) && (!is OutputOpen )) | |
481 | throw new Asynch ronousClos eException (); | |
482 | } | |
483 | asse rt IOStatu s.check(n) ; | |
484 | } | |
485 | } | |
486 | } | |
487 | ||
488 | public long writ e(ByteBuff er[] srcs, int offse t, int len gth) | |
489 | th rows IOExc eption | |
490 | { | |
491 | if ((offset < 0) || (l ength < 0) || (offse t > srcs.l ength - le ngth)) | |
492 | throw ne w IndexOut OfBoundsEx ception(); | |
493 | sy nchronized (writeLoc k) { | |
494 | ensureWr iteOpen(); | |
495 | long n = 0; | |
496 | try { | |
497 | begi n(); | |
498 | sync hronized ( stateLock) { | |
499 | if (!isOpe n()) | |
500 | return 0; | |
501 | writerThre ad = Nativ eThread.cu rrent(); | |
502 | } | |
503 | for (;;) { | |
504 | n = IOUtil .write(fd, srcs, off set, lengt h, nd); | |
505 | if ((n == IOStatus.I NTERRUPTED ) && isOpe n()) | |
506 | contin ue; | |
507 | return IOS tatus.norm alize(n); | |
508 | } | |
509 | } finall y { | |
510 | writ erCleanup( ); | |
511 | end( (n > 0) || (n == IOS tatus.UNAV AILABLE)); | |
512 | sync hronized ( stateLock) { | |
513 | if ((n <= 0) && (!is OutputOpen )) | |
514 | throw new Asynch ronousClos eException (); | |
515 | } | |
516 | asse rt IOStatu s.check(n) ; | |
517 | } | |
518 | } | |
519 | } | |
520 | ||
521 | // pac kage-priva te | |
522 | int se ndOutOfBan dData(byte b) throws IOExcepti on { | |
523 | sy nchronized (writeLoc k) { | |
524 | ensureWr iteOpen(); | |
525 | int n = 0; | |
526 | try { | |
527 | begi n(); | |
528 | sync hronized ( stateLock) { | |
529 | if (!isOpe n()) | |
530 | return 0; | |
531 | writerThre ad = Nativ eThread.cu rrent(); | |
532 | } | |
533 | for (;;) { | |
534 | n = sendOu tOfBandDat a(fd, b); | |
535 | if ((n == IOStatus.I NTERRUPTED ) && isOpe n()) | |
536 | contin ue; | |
537 | return IOS tatus.norm alize(n); | |
538 | } | |
539 | } finall y { | |
540 | writ erCleanup( ); | |
541 | end( (n > 0) || (n == IOS tatus.UNAV AILABLE)); | |
542 | sync hronized ( stateLock) { | |
543 | if ((n <= 0) && (!is OutputOpen )) | |
544 | throw new Asynch ronousClos eException (); | |
545 | } | |
546 | asse rt IOStatu s.check(n) ; | |
547 | } | |
548 | } | |
549 | } | |
550 | ||
551 | protec ted void i mplConfigu reBlocking (boolean b lock) thro ws IOExcep tion { | |
552 | IO Util.confi gureBlocki ng(fd, blo ck); | |
553 | } | |
554 | ||
555 | public InetSocke tAddress l ocalAddres s() { | |
556 | sy nchronized (stateLoc k) { | |
557 | return l ocalAddres s; | |
558 | } | |
559 | } | |
560 | ||
561 | public SocketAdd ress remot eAddress() { | |
562 | sy nchronized (stateLoc k) { | |
563 | return r emoteAddre ss; | |
564 | } | |
565 | } | |
566 | ||
567 | @Overr ide | |
568 | public SocketCha nnel bind( SocketAddr ess local) throws IO Exception { | |
569 | sy nchronized (readLock ) { | |
570 | synchron ized (writ eLock) { | |
571 | sync hronized ( stateLock) { | |
572 | if (!isOpe n()) | |
573 | throw new Closed ChannelExc eption(); | |
574 | if (state == ST_PEND ING) | |
575 | throw new Connec tionPendin gException (); | |
576 | if (localA ddress != null) | |
577 | throw new Alread yBoundExce ption(); | |
578 | InetSocket Address is a = (local == null) ? | |
579 | new In etSocketAd dress(0) : Net.check Address(lo cal); | |
580 | SecurityMa nager sm = System.ge tSecurityM anager(); | |
581 | if (sm != null) { | |
582 | sm.che ckListen(i sa.getPort ()); | |
583 | } | |
584 | NetHooks.b eforeTcpBi nd(fd, isa .getAddres s(), isa.g etPort()); | |
585 | Net.bind(f d, isa.get Address(), isa.getPo rt()); | |
586 | localAddre ss = Net.l ocalAddres s(fd); | |
587 | } | |
588 | } | |
589 | } | |
590 | re turn this; | |
591 | } | |
592 | ||
593 | public boolean i sConnected () { | |
594 | sy nchronized (stateLoc k) { | |
595 | return ( state == S T_CONNECTE D); | |
596 | } | |
597 | } | |
598 | ||
599 | public boolean i sConnectio nPending() { | |
600 | sy nchronized (stateLoc k) { | |
601 | return ( state == S T_PENDING) ; | |
602 | } | |
603 | } | |
604 | ||
605 | void e nsureOpenA ndUnconnec ted() thro ws IOExcep tion { // package-pr ivate | |
606 | sy nchronized (stateLoc k) { | |
607 | if (!isO pen()) | |
608 | thro w new Clos edChannelE xception() ; | |
609 | if (stat e == ST_CO NNECTED) | |
610 | thro w new Alre adyConnect edExceptio n(); | |
611 | if (stat e == ST_PE NDING) | |
612 | thro w new Conn ectionPend ingExcepti on(); | |
613 | } | |
614 | } | |
615 | ||
616 | public boolean c onnect(Soc ketAddress sa) throw s IOExcept ion { | |
617 | int localP ORT
|
|
618 | ||
619 | sy nchronized (readLock ) { | |
620 | synchron ized (writ eLock) { | |
621 | ensu reOpenAndU nconnected (); | |
622 | Inet SocketAddr ess isa = Net.checkA ddress(sa) ; | |
623 | Secu rityManage r sm = Sys tem.getSec urityManag er(); | |
624 | if ( sm != null ) | |
625 | sm.checkCo nnect(isa. getAddress ().getHost Address(), | |
626 | isa. getPort()) ; | |
627 | sync hronized ( blockingLo ck()) { | |
628 | int n = 0; | |
629 | try { | |
630 | try { | |
631 | be gin(); | |
632 | sy nchronized (stateLoc k) { | |
633 | if (!isO pen()) { | |
634 | retu rn false; | |
635 | } | |
636 | // notif y hook onl y if unbou nd | |
637 | if (loca lAddress = = null) { | |
638 | NetH ooks.befor eTcpConnec t(fd, | |
639 | i sa.getAddr ess(), | |
640 | i sa.getPort ()); | |
641 | } | |
642 | readerTh read = Nat iveThread. current(); | |
643 | } | |
644 | fo r (;;) { | |
645 | InetAddr ess ia = i sa.getAddr ess(); | |
646 | if (ia.i sAnyLocalA ddress()) | |
647 | ia = InetAddre ss.getLoca lHost(); | |
648 | n = Net. connect(fd , | |
649 | ia , | |
650 | is a.getPort( )); | |
651 | if ( (n == IOStat us.INTERRU PTED) | |
652 | && isOpen()) | |
653 | cont inue; | |
654 | break; | |
655 | } | |
656 | ||
657 | } fina lly { | |
658 | re aderCleanu p(); | |
659 | en d((n > 0) || (n == I OStatus.UN AVAILABLE) ); | |
660 | as sert IOSta tus.check( n); | |
661 | } | |
662 | } catch (I OException x) { | |
663 | // If an excepti on was thr own, close the chann el after | |
664 | // inv oking end( ) so as to avoid bog us | |
665 | // Asy nchronousC loseExcept ions | |
666 | close( ); | |
667 | throw x; | |
668 | } | |
669 | synchroniz ed (stateL ock) { | |
670 | remote Address = isa; | |
671 | if (n > 0) { | |
672 | ||
673 | // Connectio n succeede d; disallo w further | |
674 | // invocatio n | |
675 | st ate = ST_C ONNECTED; | |
676 | if (isOpen() ) | |
677 | localAdd ress = Net .localAddr ess(fd); | |
678 | re turn true; | |
679 | } | |
680 | // If nonblockin g and no e xception t hen connec tion | |
681 | // pen ding; disa llow anoth er invocat ion | |
682 | if (!i sBlocking( )) | |
683 | st ate = ST_P ENDING; | |
684 | else | |
685 | as sert false ; | |
686 | } | |
687 | } | |
688 | retu rn false; | |
689 | } | |
690 | } | |
691 | } | |
692 | ||
693 | public boolean f inishConne ct() throw s IOExcept ion { | |
694 | sy nchronized (readLock ) { | |
695 | synchron ized (writ eLock) { | |
696 | sync hronized ( stateLock) { | |
697 | if (!isOpe n()) | |
698 | throw new Closed ChannelExc eption(); | |
699 | if (state == ST_CONN ECTED) | |
700 | return true; | |
701 | if (state != ST_PEND ING) | |
702 | throw new NoConn ectionPend ingExcepti on(); | |
703 | } | |
704 | int n = 0; | |
705 | try { | |
706 | try { | |
707 | begin( ); | |
708 | synchr onized (bl ockingLock ()) { | |
709 | sy nchronized (stateLoc k) { | |
710 | if (!isO pen()) { | |
711 | retu rn false; | |
712 | } | |
713 | readerTh read = Nat iveThread. current(); | |
714 | } | |
715 | if (!isBlock ing()) { | |
716 | for (;;) { | |
717 | n = checkConne ct(fd, fal se, | |
718 | readyTo Connect); | |
719 | if ( (n == IO Status.INT ERRUPTED) | |
720 | && isOpe n()) | |
721 | continue; | |
722 | brea k; | |
723 | } | |
724 | } else { | |
725 | for (;;) { | |
726 | n = checkConne ct(fd, tru e, | |
727 | readyTo Connect); | |
728 | if ( n == 0) { | |
729 | // Loop in case of | |
730 | // spuriou s notifica tions | |
731 | continue; | |
732 | } | |
733 | if ( (n == IO Status.INT ERRUPTED) | |
734 | && isOpe n()) | |
735 | continue; | |
736 | brea k; | |
737 | } | |
738 | } | |
739 | } | |
740 | } finally { | |
741 | synchr onized (st ateLock) { | |
742 | re aderThread = 0; | |
743 | if (state == ST_KILLPE NDING) { | |
744 | kill(); | |
745 | // poll( )/getsocko pt() does not report | |
746 | // error (throws e xception, with n = 0 ) | |
747 | // on Li nux platfo rm after d up2 and | |
748 | // signa l-wakeup. Force n to 0 so the | |
749 | // end() can throw appropria te excepti on | |
750 | n = 0; | |
751 | } | |
752 | } | |
753 | end((n > 0) || ( n == IOSta tus.UNAVAI LABLE)); | |
754 | assert IOStatus. check(n); | |
755 | } | |
756 | } ca tch (IOExc eption x) { | |
757 | // If an e xception w as thrown, close the channel a fter | |
758 | // invokin g end() so as to avo id bogus | |
759 | // Asynchr onousClose Exceptions | |
760 | close(); | |
761 | throw x; | |
762 | } | |
763 | if ( n > 0) { | |
764 | synchroniz ed (stateL ock) { | |
765 | state = ST_CONNE CTED; | |
766 | if (is Open()) | |
767 | lo calAddress = Net.loc alAddress( fd); | |
768 | } | |
769 | return tru e; | |
770 | } | |
771 | retu rn false; | |
772 | } | |
773 | } | |
774 | } | |
775 | ||
776 | @Overr ide | |
777 | public SocketCha nnel shutd ownInput() throws IO Exception { | |
778 | sy nchronized (stateLoc k) { | |
779 | if (!isO pen()) | |
780 | thro w new Clos edChannelE xception() ; | |
781 | if (!isC onnected() ) | |
782 | thro w new NotY etConnecte dException (); | |
783 | if (isIn putOpen) { | |
784 | Net. shutdown(f d, Net.SHU T_RD); | |
785 | if ( readerThre ad != 0) | |
786 | NativeThre ad.signal( readerThre ad); | |
787 | isIn putOpen = false; | |
788 | } | |
789 | return t his; | |
790 | } | |
791 | } | |
792 | ||
793 | @Overr ide | |
794 | public SocketCha nnel shutd ownOutput( ) throws I OException { | |
795 | sy nchronized (stateLoc k) { | |
796 | if (!isO pen()) | |
797 | thro w new Clos edChannelE xception() ; | |
798 | if (!isC onnected() ) | |
799 | thro w new NotY etConnecte dException (); | |
800 | if (isOu tputOpen) { | |
801 | Net. shutdown(f d, Net.SHU T_WR); | |
802 | if ( writerThre ad != 0) | |
803 | NativeThre ad.signal( writerThre ad); | |
804 | isOu tputOpen = false; | |
805 | } | |
806 | return t his; | |
807 | } | |
808 | } | |
809 | ||
810 | public boolean i sInputOpen () { | |
811 | sy nchronized (stateLoc k) { | |
812 | return i sInputOpen ; | |
813 | } | |
814 | } | |
815 | ||
816 | public boolean i sOutputOpe n() { | |
817 | sy nchronized (stateLoc k) { | |
818 | return i sOutputOpe n; | |
819 | } | |
820 | } | |
821 | ||
822 | // Abs tractInter ruptibleCh annel sync hronizes i nvocations of this m ethod | |
823 | // usi ng Abstrac tInterrupt ibleChanne l.closeLoc k, and als o ensures that this | |
824 | // met hod is onl y ever inv oked once. Before w e get to t his method , isOpen | |
825 | // (wh ich is vol atile) wil l have bee n set to f alse. | |
826 | // | |
827 | protec ted void i mplCloseSe lectableCh annel() th rows IOExc eption { | |
828 | sy nchronized (stateLoc k) { | |
829 | isInputO pen = fals e; | |
830 | isOutput Open = fal se; | |
831 | ||
832 | // Close the under lying file descripto r and dup it to a kn own fd | |
833 | // that' s already closed. T his preven ts other o perations on this | |
834 | // chann el from us ing the ol d fd, whic h might be recycled in the | |
835 | // meant ime and al located to an entire ly differe nt channel . | |
836 | // | |
837 | if (stat e != ST_KI LLED) | |
838 | nd.p reClose(fd ); | |
839 | ||
840 | // Signa l native t hreads, if needed. If a targe t thread i s not | |
841 | // curre ntly block ed in an I /O operati on then no harm is d one since | |
842 | // the s ignal hand ler doesn' t actually do anythi ng. | |
843 | // | |
844 | if (read erThread ! = 0) | |
845 | Nati veThread.s ignal(read erThread); | |
846 | ||
847 | if (writ erThread ! = 0) | |
848 | Nati veThread.s ignal(writ erThread); | |
849 | ||
850 | // If th is channel is not re gistered t hen it's s afe to clo se the fd | |
851 | // immed iately sin ce we know at this p oint that no thread is | |
852 | // block ed in an I /O operati on upon th e channel and, since the | |
853 | // chann el is mark ed closed, no thread will star t another such | |
854 | // opera tion. If this chann el is regi stered the n we don't close | |
855 | // the f d since it might be in use by a selector . In that case | |
856 | // closi ng this ch annel caus ed its key s to be ca ncelled, s o the | |
857 | // last selector t o deregist er a key f or this ch annel will invoke | |
858 | // kill( ) to close the fd. | |
859 | // | |
860 | if (!isR egistered( )) | |
861 | kill (); | |
862 | } | |
863 | } | |
864 | ||
865 | public void kill () throws IOExceptio n { | |
866 | sy nchronized (stateLoc k) { | |
867 | if (stat e == ST_KI LLED) | |
868 | retu rn; | |
869 | if (stat e == ST_UN INITIALIZE D) { | |
870 | stat e = ST_KIL LED; | |
871 | retu rn; | |
872 | } | |
873 | assert ! isOpen() & & !isRegis tered(); | |
874 | ||
875 | // Postp one the ki ll if ther e is a wai ting reade r | |
876 | // or wr iter threa d. See the comments in read() for | |
877 | // more detailed e xplanation . | |
878 | if (read erThread = = 0 && wri terThread == 0) { | |
879 | nd.c lose(fd); | |
880 | stat e = ST_KIL LED; | |
881 | } else { | |
882 | stat e = ST_KIL LPENDING; | |
883 | } | |
884 | } | |
885 | } | |
886 | ||
887 | /** | |
888 | * Tra nslates na tive poll revent ops into a re ady operat ion ops | |
889 | */ | |
890 | public boolean t ranslateRe adyOps(int ops, int initialOps , | |
891 | Sel ectionKeyI mpl sk) { | |
892 | in t intOps = sk.nioInt erestOps() ; // Do th is just on ce, it syn chronizes | |
893 | in t oldOps = sk.nioRea dyOps(); | |
894 | in t newOps = initialOp s; | |
895 | ||
896 | if ((ops & N et.POLLNVA L) != 0) { | |
897 | // This should onl y happen i f this cha nnel is pr e-closed w hile a | |
898 | // selec tion opera tion is in progress | |
899 | // ## Th row an err or if this channel h as not bee n pre-clos ed | |
900 | return f alse; | |
901 | } | |
902 | ||
903 | if ((ops & ( Net.POLLER R | Net.PO LLHUP)) != 0) { | |
904 | newOps = intOps; | |
905 | sk.nioRe adyOps(new Ops); | |
906 | // No ne ed to poll again in checkConne ct, | |
907 | // the e rror will be detecte d there | |
908 | readyToC onnect = t rue; | |
909 | return ( newOps & ~ oldOps) != 0; | |
910 | } | |
911 | ||
912 | if (((ops & Net.POLLIN ) != 0) && | |
913 | ((intOps & Selecti onKey.OP_R EAD) != 0) && | |
914 | (state = = ST_CONNE CTED)) | |
915 | newOps | = Selectio nKey.OP_RE AD; | |
916 | ||
917 | if (((ops & Net.POLLCO NN) != 0) && | |
918 | ((intOps & Selecti onKey.OP_C ONNECT) != 0) && | |
919 | ((state == ST_UNCO NNECTED) | | (state = = ST_PENDI NG))) { | |
920 | newOps | = Selectio nKey.OP_CO NNECT; | |
921 | readyToC onnect = t rue; | |
922 | } | |
923 | ||
924 | if (((ops & Net.POLLOU T) != 0) & & | |
925 | ((intOps & Selecti onKey.OP_W RITE) != 0 ) && | |
926 | (state = = ST_CONNE CTED)) | |
927 | newOps | = Selectio nKey.OP_WR ITE; | |
928 | ||
929 | sk .nioReadyO ps(newOps) ; | |
930 | re turn (newO ps & ~oldO ps) != 0; | |
931 | } | |
932 | ||
933 | public boolean t ranslateAn dUpdateRea dyOps(int ops, Selec tionKeyImp l sk) { | |
934 | re turn trans lateReadyO ps(ops, sk .nioReadyO ps(), sk); | |
935 | } | |
936 | ||
937 | public boolean t ranslateAn dSetReadyO ps(int ops , Selectio nKeyImpl s k) { | |
938 | re turn trans lateReadyO ps(ops, 0, sk); | |
939 | } | |
940 | ||
941 | // pac kage-priva te | |
942 | int po ll(int eve nts, long timeout) t hrows IOEx ception { | |
943 | as sert Threa d.holdsLoc k(blocking Lock()) && !isBlocki ng(); | |
944 | ||
945 | sy nchronized (readLock ) { | |
946 | int n = 0; | |
947 | try { | |
948 | begi n(); | |
949 | sync hronized ( stateLock) { | |
950 | if (!isOpe n()) | |
951 | return 0; | |
952 | readerThre ad = Nativ eThread.cu rrent(); | |
953 | } | |
954 | n = Net.poll(f d, events, timeout); | |
955 | } finall y { | |
956 | read erCleanup( ); | |
957 | end( n > 0); | |
958 | } | |
959 | return n ; | |
960 | } | |
961 | } | |
962 | ||
963 | /** | |
964 | * Tra nslates an interest operation set into a native po ll event s et | |
965 | */ | |
966 | public void tran slateAndSe tInterestO ps(int ops , Selectio nKeyImpl s k) { | |
967 | in t newOps = 0; | |
968 | if ((ops & S electionKe y.OP_READ) != 0) | |
969 | newOps | = Net.POLL IN; | |
970 | if ((ops & S electionKe y.OP_WRITE ) != 0) | |
971 | newOps | = Net.POLL OUT; | |
972 | if ((ops & S electionKe y.OP_CONNE CT) != 0) | |
973 | newOps | = Net.POLL CONN; | |
974 | sk .selector. putEventOp s(sk, newO ps); | |
975 | } | |
976 | ||
977 | public FileDescr iptor getF D() { | |
978 | re turn fd; | |
979 | } | |
980 | ||
981 | public int getFD Val() { | |
982 | re turn fdVal ; | |
983 | } | |
984 | ||
985 | @Overr ide | |
986 | public String to String() { | |
987 | St ringBuffer sb = new StringBuff er(); | |
988 | sb .append(th is.getClas s().getSup erclass(). getName()) ; | |
989 | sb .append('[ '); | |
990 | if (!isOpen( )) | |
991 | sb.appen d("closed" ); | |
992 | el se { | |
993 | synchron ized (stat eLock) { | |
994 | swit ch (state) { | |
995 | case ST_UNCONN ECTED: | |
996 | sb.append( "unconnect ed"); | |
997 | break; | |
998 | case ST_PENDIN G: | |
999 | sb.append( "connectio n-pending" ); | |
1000 | break; | |
1001 | case ST_CONNEC TED: | |
1002 | sb.append( "connected "); | |
1003 | if (!isInp utOpen) | |
1004 | sb.app end(" ishu t"); | |
1005 | if (!isOut putOpen) | |
1006 | sb.app end(" oshu t"); | |
1007 | break; | |
1008 | } | |
1009 | Inet SocketAddr ess addr = localAddr ess(); | |
1010 | if ( addr != nu ll) { | |
1011 | sb.append( " local=") ; | |
1012 | sb.append( Net.getRev ealedLocal AddressAsS tring(addr )); | |
1013 | } | |
1014 | if ( remoteAddr ess() != n ull) { | |
1015 | sb.append( " remote=" ); | |
1016 | sb.append( remoteAddr ess().toSt ring()); | |
1017 | } | |
1018 | } | |
1019 | } | |
1020 | sb .append('] '); | |
1021 | re turn sb.to String(); | |
1022 | } | |
1023 | ||
1024 | ||
1025 | // -- Native met hods -- | |
1026 | ||
1027 | privat e static n ative int checkConne ct(FileDes criptor fd , | |
1028 | boolean block, bo olean read y) | |
1029 | th rows IOExc eption; | |
1030 | ||
1031 | privat e static n ative int sendOutOfB andData(Fi leDescript or fd, byt e data) | |
1032 | th rows IOExc eption; | |
1033 | ||
1034 | static { | |
1035 | IO Util.load( ); | |
1036 | nd = new Soc ketDispatc her(); | |
1037 | } | |
1038 | ||
1039 | } |
Araxis Merge (but not the data content of this report) is Copyright © 1993-2016 Araxis Ltd (www.araxis.com). All rights reserved.