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Version 4.0.2.1, tag libreoffice-4.0.2.1
[LibreOffice.git] / cppu / source / helper / purpenv / helper_purpenv_Proxy.cxx
blobf0706e190dbba6ce7f243110628307e4811c573d
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 static bool relatesToInterface(typelib_TypeDescription * pTypeDescr)
44 SAL_THROW(())
45 {
46 switch (pTypeDescr->eTypeClass)
47 {
48 // case typelib_TypeClass_TYPEDEF:
49 case typelib_TypeClass_SEQUENCE:
50 {
51 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 return true;
57 case typelib_TypeClass_SEQUENCE:
58 case typelib_TypeClass_STRUCT:
59 case typelib_TypeClass_EXCEPTION:
60 {
61 typelib_TypeDescription * pTD = 0;
62 TYPELIB_DANGER_GET( &pTD, ((typelib_IndirectTypeDescription *)pTypeDescr)->pType );
63 bool bRel = relatesToInterface( pTD );
64 TYPELIB_DANGER_RELEASE( pTD );
65 return bRel;
66 }
67 default:
68 ;
69 }
70 return false;
71 }
72 case typelib_TypeClass_STRUCT:
73 case typelib_TypeClass_EXCEPTION:
74 {
75 // ...optimized... to avoid getDescription() calls!
76 typelib_CompoundTypeDescription * pComp = (typelib_CompoundTypeDescription *)pTypeDescr;
77 typelib_TypeDescriptionReference ** pTypes = pComp->ppTypeRefs;
78 for ( sal_Int32 nPos = pComp->nMembers; nPos--; )
79 {
80 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 return true;
86 // case typelib_TypeClass_TYPEDEF:
87 case typelib_TypeClass_SEQUENCE:
88 case typelib_TypeClass_STRUCT:
89 case typelib_TypeClass_EXCEPTION:
90 {
91 typelib_TypeDescription * pTD = 0;
92 TYPELIB_DANGER_GET( &pTD, pTypes[nPos] );
93 bool bRel = relatesToInterface( pTD );
94 TYPELIB_DANGER_RELEASE( pTD );
95 if (bRel)
96 return true;
97 }
98 default:
99 ;
100 }
101 }
102 if (pComp->pBaseTypeDescription)
103 return relatesToInterface( (typelib_TypeDescription *)pComp->pBaseTypeDescription );
104 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 return true;
110
111 default:
112 ;
113 }
114 return false;
115 }
116
117 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 Proxy * pThis = static_cast<Proxy *>(pUnoI);
126
127 typelib_MethodParameter param;
128 sal_Int32 nParams = 0;
129 typelib_MethodParameter * pParams = 0;
130 typelib_TypeDescriptionReference * pReturnTypeRef = 0;
131 // sal_Int32 nOutParams = 0;
132
133 switch (pMemberType->eTypeClass)
134 {
135 case typelib_TypeClass_INTERFACE_ATTRIBUTE:
136 if (pReturn)
137 {
138 pReturnTypeRef =
139 ((typelib_InterfaceAttributeTypeDescription *)
140 pMemberType)->pAttributeTypeRef;
141 nParams = 0;
142 pParams = NULL;
143 }
144 else
145 {
146 param.pTypeRef = ((typelib_InterfaceAttributeTypeDescription *)
147 pMemberType)->pAttributeTypeRef;
148 param.bIn = sal_True;
149 param.bOut = sal_False;
150 nParams = 1;
151 pParams = &param;
152 }
153 break;
154 case typelib_TypeClass_INTERFACE_METHOD:
155 {
156 typelib_InterfaceMethodTypeDescription * method_td =
157 (typelib_InterfaceMethodTypeDescription *) pMemberType;
158 pReturnTypeRef = method_td->pReturnTypeRef;
159 nParams = method_td->nParams;
160 pParams = method_td->pParams;
161 break;
162 }
163 default:
164 OSL_FAIL( "### illegal member typeclass!" );
165 abort();
166 }
167
168 pThis->dispatch( pReturnTypeRef,
169 pParams,
170 nParams,
171 pMemberType,
172 pReturn,
173 pArgs,
174 ppException );
175 }}
176
177 extern "C" void SAL_CALL Proxy_free(SAL_UNUSED_PARAMETER uno_ExtEnvironment * /*pEnv*/, void * pProxy) SAL_THROW_EXTERN_C()
178 {
179 Proxy * pThis = static_cast<Proxy * >(reinterpret_cast<uno_Interface *>(pProxy));
180 delete pThis;
181 }
182
183 extern "C" {
184 static void SAL_CALL s_Proxy_acquire(uno_Interface * pUnoI) SAL_THROW_EXTERN_C()
185 {
186 Proxy * pProxy = static_cast<Proxy *>(pUnoI);
187 pProxy->acquire();
188 }
189
190 static void SAL_CALL s_Proxy_release(uno_Interface * pUnoI) SAL_THROW_EXTERN_C()
191 {
192 Proxy * pProxy = static_cast<Proxy *>(pUnoI);
193 pProxy->release();
194 }
195
196 static void s_acquireAndRegister_v(va_list * pParam)
197 {
198 uno_Interface * pUnoI = va_arg(*pParam, uno_Interface *);
199 rtl_uString * pOid = va_arg(*pParam, rtl_uString *);
200 typelib_InterfaceTypeDescription * pTypeDescr = va_arg(*pParam, typelib_InterfaceTypeDescription *);
201 uno_ExtEnvironment * pEnv = va_arg(*pParam, uno_ExtEnvironment *);
202
203 pUnoI->acquire(pUnoI);
204 pEnv->registerInterface(pEnv, reinterpret_cast<void **>(&pUnoI), pOid, pTypeDescr);
205 }
206 }
207
208 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 m_pProbeContext(pProbeContext)
228 {
229 LOG_LIFECYCLE_Proxy_emit(fprintf(stderr, "LIFE: %s -> %p\n", "Proxy::Proxy(<>)", this));
230
231 typelib_typedescription_acquire((typelib_TypeDescription *)m_pTypeDescr);
232 if (!((typelib_TypeDescription *)m_pTypeDescr)->bComplete)
233 typelib_typedescription_complete((typelib_TypeDescription **)&m_pTypeDescr);
234
235 OSL_ENSURE(((typelib_TypeDescription *)m_pTypeDescr)->bComplete, "### type is incomplete!");
236
237 uno_Environment_invoke(m_to.get(), s_acquireAndRegister_v, m_pUnoI, rOId.pData, pTypeDescr, m_to.get());
238
239 // uno_Interface
240 uno_Interface::acquire = s_Proxy_acquire;
241 uno_Interface::release = s_Proxy_release;
242 uno_Interface::pDispatcher = s_Proxy_dispatch;
243 }
244
245 extern "C" { static void s_releaseAndRevoke_v(va_list * pParam)
246 {
247 uno_ExtEnvironment * pEnv = va_arg(*pParam, uno_ExtEnvironment *);
248 uno_Interface * pUnoI = va_arg(*pParam, uno_Interface *);
249
250 pEnv->revokeInterface(pEnv, reinterpret_cast<void *>(pUnoI));
251 pUnoI->release(pUnoI);
252 }}
253
254 Proxy::~Proxy()
255 {
256 LOG_LIFECYCLE_Proxy_emit(fprintf(stderr, "LIFE: %s -> %p\n", "Proxy::~Proxy()", this));
257
258 uno_Environment_invoke(m_to.get(), s_releaseAndRevoke_v, m_to.get(), m_pUnoI);
259
260 typelib_typedescription_release((typelib_TypeDescription *)m_pTypeDescr);
261 }
262
263 static uno::TypeDescription getAcquireMethod(void)
264 {
265 typelib_TypeDescriptionReference * type_XInterface =
266 * typelib_static_type_getByTypeClass(typelib_TypeClass_INTERFACE);
267
268 typelib_TypeDescription * pTXInterfaceDescr = 0;
269 TYPELIB_DANGER_GET (&pTXInterfaceDescr, type_XInterface);
270 uno::TypeDescription acquire(
271 reinterpret_cast< typelib_InterfaceTypeDescription * >(
272 pTXInterfaceDescr)->ppAllMembers[1]);
273 TYPELIB_DANGER_RELEASE(pTXInterfaceDescr);
274
275 return acquire;
276 }
277
278 static uno::TypeDescription getReleaseMethod(void)
279 {
280 typelib_TypeDescriptionReference * type_XInterface =
281 * typelib_static_type_getByTypeClass(typelib_TypeClass_INTERFACE);
282
283 typelib_TypeDescription * pTXInterfaceDescr = 0;
284 TYPELIB_DANGER_GET (&pTXInterfaceDescr, type_XInterface);
285 uno::TypeDescription release(
286 reinterpret_cast< typelib_InterfaceTypeDescription * >(
287 pTXInterfaceDescr)->ppAllMembers[2]);
288 TYPELIB_DANGER_RELEASE(pTXInterfaceDescr);
289
290 return release;
291 }
292
293 static uno::TypeDescription s_acquireMethod(getAcquireMethod());
294 static uno::TypeDescription s_releaseMethod(getReleaseMethod());
295
296 void Proxy::acquire(void)
297 {
298 if (m_probeFun)
299 m_probeFun(true,
300 this,
301 m_pProbeContext,
302 *typelib_static_type_getByTypeClass(typelib_TypeClass_VOID),
303 NULL,
304 0,
305 s_acquireMethod.get(),
306 NULL,
307 NULL,
308 NULL);
309
310 if (osl_atomic_increment(&m_nRef) == 1)
311 {
312 // rebirth of proxy zombie
313 void * pThis = this;
314 m_from.get()->pExtEnv->registerProxyInterface(m_from.get()->pExtEnv,
315 &pThis,
316 Proxy_free,
317 m_aOId.pData,
318 m_pTypeDescr);
319 OSL_ASSERT(pThis == this);
320 }
321
322 if (m_probeFun)
323 m_probeFun(false,
324 this,
325 m_pProbeContext,
326 *typelib_static_type_getByTypeClass(typelib_TypeClass_VOID),
327 NULL,
328 0,
329 s_acquireMethod.get(),
330 NULL,
331 NULL,
332 NULL);
333
334 }
335
336 void Proxy::release(void)
337 {
338 cppu::helper::purpenv::ProbeFun * probeFun = m_probeFun;
339 void * pProbeContext = m_pProbeContext;
340
341 if (m_probeFun)
342 m_probeFun(true,
343 this,
344 m_pProbeContext,
345 *typelib_static_type_getByTypeClass(typelib_TypeClass_VOID),
346 NULL,
347 0,
348 s_releaseMethod.get(),
349 NULL,
350 NULL,
351 NULL);
352
353 if (osl_atomic_decrement(&m_nRef) == 0)
354 m_from.get()->pExtEnv->revokeInterface(m_from.get()->pExtEnv, this);
355
356 if (probeFun)
357 probeFun(false,
358 this,
359 pProbeContext,
360 *typelib_static_type_getByTypeClass(typelib_TypeClass_VOID),
361 NULL,
362 0,
363 s_releaseMethod.get(),
364 NULL,
365 NULL,
366 NULL);
367
368 }
369
370
371 extern "C" {
372 static void s_type_destructData_v(va_list * pParam)
373 {
374 void * ret = va_arg(*pParam, void *);
375 typelib_TypeDescriptionReference * pReturnTypeRef = va_arg(*pParam, typelib_TypeDescriptionReference *);
376
377 uno_type_destructData(ret, pReturnTypeRef, 0);
378 }
379
380 static void s_dispatcher_v(va_list * pParam)
381 {
382 uno_Interface * pUnoI = va_arg(*pParam, uno_Interface *);
383 typelib_TypeDescription const * pMemberType = va_arg(*pParam, typelib_TypeDescription const *);
384 void * pReturn = va_arg(*pParam, void *);
385 void ** pArgs = va_arg(*pParam, void **);
386 uno_Any ** ppException = va_arg(*pParam, uno_Any **);
387
388 pUnoI->pDispatcher(pUnoI, pMemberType, pReturn, pArgs, ppException);
389 }
390 }
391
392 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 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 ppException);
411
412 void ** args = (void **) alloca( sizeof (void *) * nParams );
413
414 typelib_TypeDescription * return_td = 0;
415 void * ret = pReturn;
416 if (pReturnTypeRef)
417 {
418 TYPELIB_DANGER_GET(&return_td, pReturnTypeRef);
419
420 if (relatesToInterface(return_td))
421 ret = alloca(return_td->nSize);
422
423 TYPELIB_DANGER_RELEASE(return_td);
424 }
425
426 for (sal_Int32 nPos = 0; nPos < nParams; ++ nPos)
427 {
428 typelib_MethodParameter const & param = pParams[nPos];
429 typelib_TypeDescription * td = 0;
430 TYPELIB_DANGER_GET( &td, param.pTypeRef );
431 if (relatesToInterface(td))
432 {
433 args[nPos] = alloca(td->nSize);
434 if (param.bIn)
435 {
436 uno_copyAndConvertData(args[nPos], pArgs[nPos], td, m_from_to.get());
437 }
438 }
439 else
440 {
441 args[nPos] = pArgs[nPos];
442 }
443 TYPELIB_DANGER_RELEASE( td );
444 }
445
446 uno_Any exc_data;
447 uno_Any * exc = &exc_data;
448
449 // do the UNO call...
450 uno_Environment_invoke(m_to.get(), s_dispatcher_v, m_pUnoI, pMemberType, ret, args, &exc);
451
452 if (exc == 0)
453 {
454 for (sal_Int32 nPos = 0; nPos < nParams; ++ nPos)
455 {
456 if (args[nPos] != pArgs[nPos])
457 {
458 typelib_MethodParameter const & param = pParams[nPos];
459 if (param.bOut)
460 {
461 if (param.bIn) // is inout
462 {
463 uno_type_destructData(pArgs[nPos], param.pTypeRef, 0);
464 }
465 uno_type_copyAndConvertData(pArgs[ nPos ],
466 args[ nPos ],
467 param.pTypeRef,
468 m_to_from.get());
469 }
470 uno_Environment_invoke(m_to.get(), s_type_destructData_v, args[nPos], param.pTypeRef, 0);
471 }
472 }
473 if (ret != pReturn)
474 {
475 uno_type_copyAndConvertData(pReturn,
476 ret,
477 pReturnTypeRef,
478 m_to_from.get());
479
480 uno_Environment_invoke(m_to.get(), s_type_destructData_v, ret, pReturnTypeRef, 0);
481 }
482
483 *ppException = 0;
484 }
485 else // exception occurred
486 {
487 for (sal_Int32 nPos = 0; nPos < nParams; ++ nPos)
488 {
489 if (args[nPos] != pArgs[nPos])
490 {
491 typelib_MethodParameter const & param = pParams[nPos];
492 if (param.bIn)
493 {
494 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 m_to_from.get());
503
504 // FIXME: need to destruct in m_to
505 uno_any_destruct(exc, 0);
506 }
507
508 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 ppException);
519 }
520
521 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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