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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 :
21 : #include "Proxy.hxx"
22 :
23 : #include "sal/alloca.h"
24 : #include "uno/dispatcher.h"
25 : #include "typelib/typedescription.hxx"
26 : #include "cppu/EnvDcp.hxx"
27 :
28 :
29 : //#define LOG_LIFECYCLE_Proxy
30 : #ifdef LOG_LIFECYCLE_Proxy
31 : # include <iostream>
32 : # define LOG_LIFECYCLE_Proxy_emit(x) x
33 :
34 : #else
35 : # define LOG_LIFECYCLE_Proxy_emit(x)
36 :
37 : #endif
38 :
39 :
40 : using namespace com::sun::star;
41 :
42 :
43 0 : static bool relatesToInterface(typelib_TypeDescription * pTypeDescr)
44 : SAL_THROW(())
45 : {
46 0 : switch (pTypeDescr->eTypeClass)
47 : {
48 : // case typelib_TypeClass_TYPEDEF:
49 : case typelib_TypeClass_SEQUENCE:
50 : {
51 0 : switch (((typelib_IndirectTypeDescription *)pTypeDescr)->pType->eTypeClass)
52 : {
53 : case typelib_TypeClass_INTERFACE:
54 : case typelib_TypeClass_UNION: // might relate to interface
55 : case typelib_TypeClass_ANY: // might relate to interface
56 0 : return true;
57 : case typelib_TypeClass_SEQUENCE:
58 : case typelib_TypeClass_STRUCT:
59 : case typelib_TypeClass_EXCEPTION:
60 : {
61 0 : typelib_TypeDescription * pTD = 0;
62 0 : TYPELIB_DANGER_GET( &pTD, ((typelib_IndirectTypeDescription *)pTypeDescr)->pType );
63 0 : bool bRel = relatesToInterface( pTD );
64 0 : TYPELIB_DANGER_RELEASE( pTD );
65 0 : return bRel;
66 : }
67 : default:
68 : ;
69 : }
70 0 : return false;
71 : }
72 : case typelib_TypeClass_STRUCT:
73 : case typelib_TypeClass_EXCEPTION:
74 : {
75 : // ...optimized... to avoid getDescription() calls!
76 0 : typelib_CompoundTypeDescription * pComp = (typelib_CompoundTypeDescription *)pTypeDescr;
77 0 : typelib_TypeDescriptionReference ** pTypes = pComp->ppTypeRefs;
78 0 : for ( sal_Int32 nPos = pComp->nMembers; nPos--; )
79 : {
80 0 : switch (pTypes[nPos]->eTypeClass)
81 : {
82 : case typelib_TypeClass_INTERFACE:
83 : case typelib_TypeClass_UNION: // might relate to interface
84 : case typelib_TypeClass_ANY: // might relate to interface
85 0 : return true;
86 : // case typelib_TypeClass_TYPEDEF:
87 : case typelib_TypeClass_SEQUENCE:
88 : case typelib_TypeClass_STRUCT:
89 : case typelib_TypeClass_EXCEPTION:
90 : {
91 0 : typelib_TypeDescription * pTD = 0;
92 0 : TYPELIB_DANGER_GET( &pTD, pTypes[nPos] );
93 0 : bool bRel = relatesToInterface( pTD );
94 0 : TYPELIB_DANGER_RELEASE( pTD );
95 0 : if (bRel)
96 0 : return true;
97 : }
98 : default:
99 : ;
100 : }
101 : }
102 0 : if (pComp->pBaseTypeDescription)
103 0 : return relatesToInterface( (typelib_TypeDescription *)pComp->pBaseTypeDescription );
104 0 : break;
105 : }
106 : case typelib_TypeClass_UNION: // might relate to interface
107 : case typelib_TypeClass_ANY: // might relate to interface
108 : case typelib_TypeClass_INTERFACE:
109 0 : return true;
110 :
111 : default:
112 : ;
113 : }
114 0 : return false;
115 : }
116 :
117 0 : extern "C" { static void SAL_CALL s_Proxy_dispatch(
118 : uno_Interface * pUnoI,
119 : typelib_TypeDescription const * pMemberType,
120 : void * pReturn,
121 : void * pArgs[],
122 : uno_Any ** ppException)
123 : SAL_THROW_EXTERN_C()
124 : {
125 0 : Proxy * pThis = static_cast<Proxy *>(pUnoI);
126 :
127 : typelib_MethodParameter param;
128 0 : sal_Int32 nParams = 0;
129 0 : typelib_MethodParameter * pParams = 0;
130 0 : typelib_TypeDescriptionReference * pReturnTypeRef = 0;
131 : // sal_Int32 nOutParams = 0;
132 :
133 0 : switch (pMemberType->eTypeClass)
134 : {
135 : case typelib_TypeClass_INTERFACE_ATTRIBUTE:
136 0 : if (pReturn)
137 : {
138 : pReturnTypeRef =
139 : ((typelib_InterfaceAttributeTypeDescription *)
140 0 : pMemberType)->pAttributeTypeRef;
141 0 : nParams = 0;
142 0 : pParams = NULL;
143 : }
144 : else
145 : {
146 : param.pTypeRef = ((typelib_InterfaceAttributeTypeDescription *)
147 0 : pMemberType)->pAttributeTypeRef;
148 0 : param.bIn = sal_True;
149 0 : param.bOut = sal_False;
150 0 : nParams = 1;
151 0 : pParams = ¶m;
152 : }
153 0 : break;
154 : case typelib_TypeClass_INTERFACE_METHOD:
155 : {
156 : typelib_InterfaceMethodTypeDescription * method_td =
157 0 : (typelib_InterfaceMethodTypeDescription *) pMemberType;
158 0 : pReturnTypeRef = method_td->pReturnTypeRef;
159 0 : nParams = method_td->nParams;
160 0 : pParams = method_td->pParams;
161 0 : break;
162 : }
163 : default:
164 : OSL_FAIL( "### illegal member typeclass!" );
165 0 : abort();
166 : }
167 :
168 : pThis->dispatch( pReturnTypeRef,
169 : pParams,
170 : nParams,
171 : pMemberType,
172 : pReturn,
173 : pArgs,
174 0 : ppException );
175 0 : }}
176 :
177 0 : extern "C" void SAL_CALL Proxy_free(SAL_UNUSED_PARAMETER uno_ExtEnvironment * /*pEnv*/, void * pProxy) SAL_THROW_EXTERN_C()
178 : {
179 0 : Proxy * pThis = static_cast<Proxy * >(reinterpret_cast<uno_Interface *>(pProxy));
180 0 : delete pThis;
181 0 : }
182 :
183 : extern "C" {
184 0 : static void SAL_CALL s_Proxy_acquire(uno_Interface * pUnoI) SAL_THROW_EXTERN_C()
185 : {
186 0 : Proxy * pProxy = static_cast<Proxy *>(pUnoI);
187 0 : pProxy->acquire();
188 0 : }
189 :
190 0 : static void SAL_CALL s_Proxy_release(uno_Interface * pUnoI) SAL_THROW_EXTERN_C()
191 : {
192 0 : Proxy * pProxy = static_cast<Proxy *>(pUnoI);
193 0 : pProxy->release();
194 0 : }
195 :
196 0 : static void s_acquireAndRegister_v(va_list * pParam)
197 : {
198 0 : uno_Interface * pUnoI = va_arg(*pParam, uno_Interface *);
199 0 : rtl_uString * pOid = va_arg(*pParam, rtl_uString *);
200 0 : typelib_InterfaceTypeDescription * pTypeDescr = va_arg(*pParam, typelib_InterfaceTypeDescription *);
201 0 : uno_ExtEnvironment * pEnv = va_arg(*pParam, uno_ExtEnvironment *);
202 :
203 0 : pUnoI->acquire(pUnoI);
204 0 : pEnv->registerInterface(pEnv, reinterpret_cast<void **>(&pUnoI), pOid, pTypeDescr);
205 0 : }
206 : }
207 :
208 0 : Proxy::Proxy(uno::Mapping const & to_from,
209 : uno_Environment * pTo,
210 : uno_Environment * pFrom,
211 : uno_Interface * pUnoI,
212 : typelib_InterfaceTypeDescription * pTypeDescr,
213 : rtl::OUString const & rOId,
214 : cppu::helper::purpenv::ProbeFun * probeFun,
215 : void * pProbeContext
216 : )
217 : SAL_THROW(())
218 : : m_nRef (1),
219 : m_from (pFrom),
220 : m_to (pTo),
221 : m_from_to (pFrom, pTo),
222 : m_to_from (to_from),
223 : m_pUnoI (pUnoI),
224 : m_pTypeDescr (pTypeDescr),
225 : m_aOId (rOId),
226 : m_probeFun (probeFun),
227 0 : m_pProbeContext(pProbeContext)
228 : {
229 : LOG_LIFECYCLE_Proxy_emit(fprintf(stderr, "LIFE: %s -> %p\n", "Proxy::Proxy(<>)", this));
230 :
231 0 : typelib_typedescription_acquire((typelib_TypeDescription *)m_pTypeDescr);
232 0 : if (!((typelib_TypeDescription *)m_pTypeDescr)->bComplete)
233 0 : typelib_typedescription_complete((typelib_TypeDescription **)&m_pTypeDescr);
234 :
235 : OSL_ENSURE(((typelib_TypeDescription *)m_pTypeDescr)->bComplete, "### type is incomplete!");
236 :
237 0 : uno_Environment_invoke(m_to.get(), s_acquireAndRegister_v, m_pUnoI, rOId.pData, pTypeDescr, m_to.get());
238 :
239 : // uno_Interface
240 0 : uno_Interface::acquire = s_Proxy_acquire;
241 0 : uno_Interface::release = s_Proxy_release;
242 0 : uno_Interface::pDispatcher = s_Proxy_dispatch;
243 0 : }
244 :
245 0 : extern "C" { static void s_releaseAndRevoke_v(va_list * pParam)
246 : {
247 0 : uno_ExtEnvironment * pEnv = va_arg(*pParam, uno_ExtEnvironment *);
248 0 : uno_Interface * pUnoI = va_arg(*pParam, uno_Interface *);
249 :
250 0 : pEnv->revokeInterface(pEnv, reinterpret_cast<void *>(pUnoI));
251 0 : pUnoI->release(pUnoI);
252 0 : }}
253 :
254 0 : Proxy::~Proxy()
255 : {
256 : LOG_LIFECYCLE_Proxy_emit(fprintf(stderr, "LIFE: %s -> %p\n", "Proxy::~Proxy()", this));
257 :
258 0 : uno_Environment_invoke(m_to.get(), s_releaseAndRevoke_v, m_to.get(), m_pUnoI);
259 :
260 0 : typelib_typedescription_release((typelib_TypeDescription *)m_pTypeDescr);
261 0 : }
262 :
263 0 : static uno::TypeDescription getAcquireMethod(void)
264 : {
265 : typelib_TypeDescriptionReference * type_XInterface =
266 0 : * typelib_static_type_getByTypeClass(typelib_TypeClass_INTERFACE);
267 :
268 0 : typelib_TypeDescription * pTXInterfaceDescr = 0;
269 0 : TYPELIB_DANGER_GET (&pTXInterfaceDescr, type_XInterface);
270 : uno::TypeDescription acquire(
271 : reinterpret_cast< typelib_InterfaceTypeDescription * >(
272 0 : pTXInterfaceDescr)->ppAllMembers[1]);
273 0 : TYPELIB_DANGER_RELEASE(pTXInterfaceDescr);
274 :
275 0 : return acquire;
276 : }
277 :
278 0 : static uno::TypeDescription getReleaseMethod(void)
279 : {
280 : typelib_TypeDescriptionReference * type_XInterface =
281 0 : * typelib_static_type_getByTypeClass(typelib_TypeClass_INTERFACE);
282 :
283 0 : typelib_TypeDescription * pTXInterfaceDescr = 0;
284 0 : TYPELIB_DANGER_GET (&pTXInterfaceDescr, type_XInterface);
285 : uno::TypeDescription release(
286 : reinterpret_cast< typelib_InterfaceTypeDescription * >(
287 0 : pTXInterfaceDescr)->ppAllMembers[2]);
288 0 : TYPELIB_DANGER_RELEASE(pTXInterfaceDescr);
289 :
290 0 : return release;
291 : }
292 :
293 0 : static uno::TypeDescription s_acquireMethod(getAcquireMethod());
294 0 : static uno::TypeDescription s_releaseMethod(getReleaseMethod());
295 :
296 0 : void Proxy::acquire(void)
297 : {
298 0 : if (m_probeFun)
299 : m_probeFun(true,
300 : this,
301 : m_pProbeContext,
302 0 : *typelib_static_type_getByTypeClass(typelib_TypeClass_VOID),
303 : NULL,
304 : 0,
305 0 : s_acquireMethod.get(),
306 : NULL,
307 : NULL,
308 0 : NULL);
309 :
310 0 : if (osl_atomic_increment(&m_nRef) == 1)
311 : {
312 : // rebirth of proxy zombie
313 0 : void * pThis = this;
314 0 : m_from.get()->pExtEnv->registerProxyInterface(m_from.get()->pExtEnv,
315 : &pThis,
316 : Proxy_free,
317 : m_aOId.pData,
318 0 : m_pTypeDescr);
319 : OSL_ASSERT(pThis == this);
320 : }
321 :
322 0 : if (m_probeFun)
323 : m_probeFun(false,
324 : this,
325 : m_pProbeContext,
326 0 : *typelib_static_type_getByTypeClass(typelib_TypeClass_VOID),
327 : NULL,
328 : 0,
329 0 : s_acquireMethod.get(),
330 : NULL,
331 : NULL,
332 0 : NULL);
333 :
334 0 : }
335 :
336 0 : void Proxy::release(void)
337 : {
338 0 : cppu::helper::purpenv::ProbeFun * probeFun = m_probeFun;
339 0 : void * pProbeContext = m_pProbeContext;
340 :
341 0 : if (m_probeFun)
342 : m_probeFun(true,
343 : this,
344 : m_pProbeContext,
345 0 : *typelib_static_type_getByTypeClass(typelib_TypeClass_VOID),
346 : NULL,
347 : 0,
348 0 : s_releaseMethod.get(),
349 : NULL,
350 : NULL,
351 0 : NULL);
352 :
353 0 : if (osl_atomic_decrement(&m_nRef) == 0)
354 0 : m_from.get()->pExtEnv->revokeInterface(m_from.get()->pExtEnv, this);
355 :
356 0 : if (probeFun)
357 : probeFun(false,
358 : this,
359 : pProbeContext,
360 0 : *typelib_static_type_getByTypeClass(typelib_TypeClass_VOID),
361 : NULL,
362 : 0,
363 0 : s_releaseMethod.get(),
364 : NULL,
365 : NULL,
366 0 : NULL);
367 :
368 0 : }
369 :
370 :
371 : extern "C" {
372 0 : static void s_type_destructData_v(va_list * pParam)
373 : {
374 0 : void * ret = va_arg(*pParam, void *);
375 0 : typelib_TypeDescriptionReference * pReturnTypeRef = va_arg(*pParam, typelib_TypeDescriptionReference *);
376 :
377 0 : uno_type_destructData(ret, pReturnTypeRef, 0);
378 0 : }
379 :
380 0 : static void s_dispatcher_v(va_list * pParam)
381 : {
382 0 : uno_Interface * pUnoI = va_arg(*pParam, uno_Interface *);
383 0 : typelib_TypeDescription const * pMemberType = va_arg(*pParam, typelib_TypeDescription const *);
384 0 : void * pReturn = va_arg(*pParam, void *);
385 0 : void ** pArgs = va_arg(*pParam, void **);
386 0 : uno_Any ** ppException = va_arg(*pParam, uno_Any **);
387 :
388 0 : pUnoI->pDispatcher(pUnoI, pMemberType, pReturn, pArgs, ppException);
389 0 : }
390 : }
391 :
392 0 : void Proxy::dispatch(typelib_TypeDescriptionReference * pReturnTypeRef,
393 : typelib_MethodParameter * pParams,
394 : sal_Int32 nParams,
395 : typelib_TypeDescription const * pMemberType,
396 : void * pReturn,
397 : void * pArgs[],
398 : uno_Any ** ppException)
399 : {
400 0 : if (m_probeFun)
401 : m_probeFun(true,
402 : this,
403 : m_pProbeContext,
404 : pReturnTypeRef,
405 : pParams,
406 : nParams,
407 : pMemberType,
408 : pReturn,
409 : pArgs,
410 0 : ppException);
411 :
412 0 : void ** args = (void **) alloca( sizeof (void *) * nParams );
413 :
414 0 : typelib_TypeDescription * return_td = 0;
415 0 : void * ret = pReturn;
416 0 : if (pReturnTypeRef)
417 : {
418 0 : TYPELIB_DANGER_GET(&return_td, pReturnTypeRef);
419 :
420 0 : if (relatesToInterface(return_td))
421 0 : ret = alloca(return_td->nSize);
422 :
423 0 : TYPELIB_DANGER_RELEASE(return_td);
424 : }
425 :
426 0 : for (sal_Int32 nPos = 0; nPos < nParams; ++ nPos)
427 : {
428 0 : typelib_MethodParameter const & param = pParams[nPos];
429 0 : typelib_TypeDescription * td = 0;
430 0 : TYPELIB_DANGER_GET( &td, param.pTypeRef );
431 0 : if (relatesToInterface(td))
432 : {
433 0 : args[nPos] = alloca(td->nSize);
434 0 : if (param.bIn)
435 : {
436 0 : uno_copyAndConvertData(args[nPos], pArgs[nPos], td, m_from_to.get());
437 : }
438 : }
439 : else
440 : {
441 0 : args[nPos] = pArgs[nPos];
442 : }
443 0 : TYPELIB_DANGER_RELEASE( td );
444 : }
445 :
446 : uno_Any exc_data;
447 0 : uno_Any * exc = &exc_data;
448 :
449 : // do the UNO call...
450 0 : uno_Environment_invoke(m_to.get(), s_dispatcher_v, m_pUnoI, pMemberType, ret, args, &exc);
451 :
452 0 : if (exc == 0)
453 : {
454 0 : for (sal_Int32 nPos = 0; nPos < nParams; ++ nPos)
455 : {
456 0 : if (args[nPos] != pArgs[nPos])
457 : {
458 0 : typelib_MethodParameter const & param = pParams[nPos];
459 0 : if (param.bOut)
460 : {
461 0 : if (param.bIn) // is inout
462 : {
463 0 : uno_type_destructData(pArgs[nPos], param.pTypeRef, 0);
464 : }
465 0 : uno_type_copyAndConvertData(pArgs[ nPos ],
466 0 : args[ nPos ],
467 : param.pTypeRef,
468 0 : m_to_from.get());
469 : }
470 0 : uno_Environment_invoke(m_to.get(), s_type_destructData_v, args[nPos], param.pTypeRef, 0);
471 : }
472 : }
473 0 : if (ret != pReturn)
474 : {
475 : uno_type_copyAndConvertData(pReturn,
476 : ret,
477 : pReturnTypeRef,
478 0 : m_to_from.get());
479 :
480 0 : uno_Environment_invoke(m_to.get(), s_type_destructData_v, ret, pReturnTypeRef, 0);
481 : }
482 :
483 0 : *ppException = 0;
484 : }
485 : else // exception occurred
486 : {
487 0 : for (sal_Int32 nPos = 0; nPos < nParams; ++ nPos)
488 : {
489 0 : if (args[nPos] != pArgs[nPos])
490 : {
491 0 : typelib_MethodParameter const & param = pParams[nPos];
492 0 : if (param.bIn)
493 : {
494 0 : uno_Environment_invoke(m_to.get(), s_type_destructData_v, args[nPos], param.pTypeRef, 0);
495 : }
496 : }
497 : }
498 :
499 : uno_type_any_constructAndConvert(*ppException,
500 : exc->pData,
501 : exc->pType,
502 0 : m_to_from.get());
503 :
504 : // FIXME: need to destruct in m_to
505 0 : uno_any_destruct(exc, 0);
506 : }
507 :
508 0 : if (m_probeFun)
509 : m_probeFun(false,
510 : this,
511 : m_pProbeContext,
512 : pReturnTypeRef,
513 : pParams,
514 : nParams,
515 : pMemberType,
516 : pReturn,
517 : pArgs,
518 0 : ppException);
519 0 : }
520 :
521 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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