DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Untracked file

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Pierre Phaneuf <pp@ludusdesign.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */


// DO NOT COPY THIS CODE INTO YOUR SOURCE!  USE NS_IMPL_NSGETMODULE()

#include "nsGenericFactory.h"
#include "nsMemory.h"
#include "nsCOMPtr.h"
#include "nsIComponentManager.h"
#include "nsIComponentRegistrar.h"
#include "nsIProgrammingLanguage.h"

#ifdef XPCOM_GLUE
#include "nsXPCOMGlue.h"
#include "nsXPCOMPrivate.h"
#endif

nsGenericFactory::nsGenericFactory(const nsModuleComponentInfo *info)
    : mInfo(info)
{
    if (mInfo && mInfo->mClassInfoGlobal)
        *mInfo->mClassInfoGlobal = static_cast<nsIClassInfo *>(this);
}

nsGenericFactory::~nsGenericFactory()
{
    if (mInfo) {
        if (mInfo->mFactoryDestructor)
            mInfo->mFactoryDestructor();
        if (mInfo->mClassInfoGlobal)
            *mInfo->mClassInfoGlobal = 0;
    }
}

NS_IMPL_THREADSAFE_ISUPPORTS3(nsGenericFactory,
                              nsIGenericFactory, 
                              nsIFactory,
                              nsIClassInfo)

NS_IMETHODIMP nsGenericFactory::CreateInstance(nsISupports *aOuter,
                                               REFNSIID aIID, void **aResult)
{
    if (mInfo->mConstructor) {
        return mInfo->mConstructor(aOuter, aIID, aResult);
    }

    return NS_ERROR_FACTORY_NOT_REGISTERED;
}

NS_IMETHODIMP nsGenericFactory::LockFactory(PRBool aLock)
{
    // XXX do we care if (mInfo->mFlags & THREADSAFE)?
    return NS_OK;
}

NS_IMETHODIMP nsGenericFactory::GetInterfaces(PRUint32 *countp,
                                              nsIID* **array)
{
    if (!mInfo->mGetInterfacesProc) {
        *countp = 0;
        *array = nsnull;
        return NS_OK;
    }
    return mInfo->mGetInterfacesProc(countp, array);
}

NS_IMETHODIMP nsGenericFactory::GetHelperForLanguage(PRUint32 language,
                                                     nsISupports **helper)
{
    if (mInfo->mGetLanguageHelperProc)
        return mInfo->mGetLanguageHelperProc(language, helper);
    *helper = nsnull;
    return NS_OK;
}

NS_IMETHODIMP nsGenericFactory::GetContractID(char **aContractID)
{
    if (mInfo->mContractID) {
        *aContractID = (char *)nsMemory::Alloc(strlen(mInfo->mContractID) + 1);
        if (!*aContractID)
            return NS_ERROR_OUT_OF_MEMORY;
        strcpy(*aContractID, mInfo->mContractID);
    } else {
        *aContractID = nsnull;
    }
    return NS_OK;
}

NS_IMETHODIMP nsGenericFactory::GetClassDescription(char * *aClassDescription)
{
    if (mInfo->mDescription) {
        *aClassDescription = (char *)
            nsMemory::Alloc(strlen(mInfo->mDescription) + 1);
        if (!*aClassDescription)
            return NS_ERROR_OUT_OF_MEMORY;
        strcpy(*aClassDescription, mInfo->mDescription);
    } else {
        *aClassDescription = nsnull;
    }
    return NS_OK;
}

NS_IMETHODIMP nsGenericFactory::GetClassID(nsCID * *aClassID)
{
    *aClassID =
        reinterpret_cast<nsCID*>
                        (nsMemory::Clone(&mInfo->mCID, sizeof mInfo->mCID));
    if (! *aClassID)
        return NS_ERROR_OUT_OF_MEMORY;
    return NS_OK;
}

NS_IMETHODIMP nsGenericFactory::GetClassIDNoAlloc(nsCID *aClassID)
{
    *aClassID = mInfo->mCID;
    return NS_OK;
}

NS_IMETHODIMP nsGenericFactory::GetImplementationLanguage(PRUint32 *langp)
{
    *langp = nsIProgrammingLanguage::CPLUSPLUS;
    return NS_OK;
}

NS_IMETHODIMP nsGenericFactory::GetFlags(PRUint32 *flagsp)
{
    *flagsp = mInfo->mFlags;
    return NS_OK;
}

// nsIGenericFactory: component-info accessors
NS_IMETHODIMP nsGenericFactory::SetComponentInfo(const nsModuleComponentInfo *info)
{
    if (mInfo && mInfo->mClassInfoGlobal)
        *mInfo->mClassInfoGlobal = 0;
    mInfo = info;
    if (mInfo && mInfo->mClassInfoGlobal)
        *mInfo->mClassInfoGlobal = static_cast<nsIClassInfo *>(this);
    return NS_OK;
}

NS_IMETHODIMP nsGenericFactory::GetComponentInfo(const nsModuleComponentInfo **infop)
{
    *infop = mInfo;
    return NS_OK;
}

NS_METHOD nsGenericFactory::Create(nsISupports* outer, const nsIID& aIID, void* *aInstancePtr)
{
    // sorry, aggregation not spoken here.
    nsresult res = NS_ERROR_NO_AGGREGATION;
    if (outer == NULL) {
        nsGenericFactory* factory = new nsGenericFactory;
        if (factory != NULL) {
            res = factory->QueryInterface(aIID, aInstancePtr);
            if (res != NS_OK)
                delete factory;
        } else {
            res = NS_ERROR_OUT_OF_MEMORY;
        }
    }
    return res;
}

NS_COM_GLUE nsresult
NS_NewGenericFactory(nsIGenericFactory* *result,
                     const nsModuleComponentInfo *info)
{
    nsresult rv;
    nsIGenericFactory* fact;
    rv = nsGenericFactory::Create(NULL, NS_GET_IID(nsIGenericFactory), (void**)&fact);
    if (NS_FAILED(rv)) return rv;
    rv = fact->SetComponentInfo(info);
    if (NS_FAILED(rv)) goto error;
    *result = fact;
    return rv;

  error:
    NS_RELEASE(fact);
    return rv;
}

////////////////////////////////////////////////////////////////////////////////

nsGenericModule::nsGenericModule(const char* moduleName, PRUint32 componentCount,
                                 const nsModuleComponentInfo* components,
                                 nsModuleConstructorProc ctor,
                                 nsModuleDestructorProc dtor)
    : mInitialized(PR_FALSE), 
      mModuleName(moduleName),
      mComponentCount(componentCount),
      mComponents(components),
      mFactoriesNotToBeRegistered(nsnull),
      mCtor(ctor),
      mDtor(dtor)
{
}

nsGenericModule::~nsGenericModule()
{
    Shutdown();

#ifdef XPCOM_GLUE
   XPCOMGlueShutdown();
#endif

}

NS_IMPL_THREADSAFE_ISUPPORTS1(nsGenericModule, nsIModule)

nsresult 
nsGenericModule::AddFactoryNode(nsIGenericFactory* fact)
{
    if (!fact)
        return NS_ERROR_FAILURE;

    FactoryNode *node = new FactoryNode(fact, mFactoriesNotToBeRegistered);
    if (!node)
        return NS_ERROR_OUT_OF_MEMORY;
    
    mFactoriesNotToBeRegistered = node;
    return NS_OK;
}


// Perform our one-time intialization for this module
nsresult
nsGenericModule::Initialize(nsIComponentManager *compMgr)
{
    nsresult rv;

    if (mInitialized) {
        return NS_OK;
    }

    if (mCtor) {
        rv = mCtor(this);
        if (NS_FAILED(rv))
            return rv;
    }


#ifdef XPCOM_GLUE
    rv = XPCOMGlueStartup(".");
    if (NS_FAILED(rv))
        return rv;
#endif

    nsCOMPtr<nsIComponentRegistrar> registrar = do_QueryInterface(compMgr, &rv);
    if (NS_FAILED(rv))
        return rv;

    // Eagerly populate factory/class object hash for entries
    // without constructors. If we didn't, the class object would
    // never get created. Also create the factory, which doubles
    // as the class object, if the EAGER_CLASSINFO flag was given.
    // This allows objects to be created (within their modules)
    // via operator new rather than CreateInstance, yet still be
    // QI'able to nsIClassInfo.
    const nsModuleComponentInfo* desc = mComponents;
    for (PRUint32 i = 0; i < mComponentCount; i++) {
        if (!desc->mConstructor ||
            (desc->mFlags & nsIClassInfo::EAGER_CLASSINFO)) {
            nsCOMPtr<nsIGenericFactory> fact;
            nsresult rv = NS_NewGenericFactory(getter_AddRefs(fact), desc);
            if (NS_FAILED(rv)) return rv;

            // if we don't have a mConstructor, then we should not populate
            // the component manager.
            if (!desc->mConstructor) {
                rv = AddFactoryNode(fact);
            } else {
                rv = registrar->RegisterFactory(desc->mCID, 
                                                desc->mDescription,
                                                desc->mContractID, 
                                                fact);
            }
            if (NS_FAILED(rv)) return rv;
        }
        desc++;
    }

    mInitialized = PR_TRUE;
    return NS_OK;
}

// Shutdown this module, releasing all of the module resources
void
nsGenericModule::Shutdown()
{
    // Free cached factories that were not registered.
    FactoryNode* node;
    while (mFactoriesNotToBeRegistered)
    {
        node = mFactoriesNotToBeRegistered->mNext;
        delete mFactoriesNotToBeRegistered;
        mFactoriesNotToBeRegistered = node;
    }

    if (mInitialized) {
        mInitialized = PR_FALSE;

        if (mDtor)
            mDtor(this);
    }
}

// Create a factory object for creating instances of aClass.
NS_IMETHODIMP
nsGenericModule::GetClassObject(nsIComponentManager *aCompMgr,
                                const nsCID& aClass,
                                const nsIID& aIID,
                                void** r_classObj)
{
    nsresult rv;

    // Defensive programming: Initialize *r_classObj in case of error below
    if (!r_classObj) {
        return NS_ERROR_INVALID_POINTER;
    }
    *r_classObj = NULL;

    // Do one-time-only initialization if necessary
    if (!mInitialized) {
        rv = Initialize(aCompMgr);
        if (NS_FAILED(rv)) {
            // Initialization failed! yikes!
            return rv;
        }
    }

    // Choose the appropriate factory, based on the desired instance
    // class type (aClass).
    const nsModuleComponentInfo* desc = mComponents;
    for (PRUint32 i = 0; i < mComponentCount; i++) {
        if (desc->mCID.Equals(aClass)) {
            nsCOMPtr<nsIGenericFactory> fact;
            rv = NS_NewGenericFactory(getter_AddRefs(fact), desc);
            if (NS_FAILED(rv)) return rv;
            return fact->QueryInterface(aIID, r_classObj);
        }
        desc++;
    }
    // not found in descriptions
    return NS_ERROR_FACTORY_NOT_REGISTERED;
}

NS_IMETHODIMP
nsGenericModule::RegisterSelf(nsIComponentManager *aCompMgr,
                              nsIFile* aPath,
                              const char* registryLocation,
                              const char* componentType)
{
    nsresult rv = NS_OK;

#ifdef DEBUG
    printf_stderr("*** Registering components in: %s\n", mModuleName);
#endif

    const nsModuleComponentInfo* cp = mComponents;
    for (PRUint32 i = 0; i < mComponentCount; i++) {
        // Register the component only if it has a constructor
        if (cp->mConstructor) {
            nsCOMPtr<nsIComponentRegistrar> registrar = do_QueryInterface(aCompMgr, &rv);
            if (registrar)
                rv = registrar->RegisterFactoryLocation(cp->mCID, 
                                                        cp->mDescription,
                                                        cp->mContractID, 
                                                        aPath,
                                                        registryLocation,
                                                        componentType);
            if (NS_FAILED(rv)) {
#ifdef DEBUG
                printf_stderr("nsGenericModule %s: unable to register %s component => %x\n",
                       mModuleName?mModuleName:"(null)", cp->mDescription?cp->mDescription:"(null)", rv);
#endif
                break;
            }
        }
        // Call the registration hook of the component, if any
        if (cp->mRegisterSelfProc)
        {
            rv = cp->mRegisterSelfProc(aCompMgr, aPath, registryLocation,
                                       componentType, cp);
            if (NS_FAILED(rv)) {
#ifdef DEBUG
                printf_stderr("nsGenericModule %s: Register hook for %s component returned error => %x\n",
                       mModuleName?mModuleName:"(null)", cp->mDescription?cp->mDescription:"(null)", rv);
#endif
                break;
            }
        }
        cp++;
    }

    return rv;
}

NS_IMETHODIMP
nsGenericModule::UnregisterSelf(nsIComponentManager* aCompMgr,
                            nsIFile* aPath,
                            const char* registryLocation)
{
#ifdef DEBUG
    printf_stderr("*** Unregistering components in: %s\n", mModuleName);
#endif
    const nsModuleComponentInfo* cp = mComponents;
    for (PRUint32 i = 0; i < mComponentCount; i++) {
        // Call the unregistration hook of the component, if any
        if (cp->mUnregisterSelfProc)
        {
            cp->mUnregisterSelfProc(aCompMgr, aPath, registryLocation, cp);
        }

        // Unregister the component
        nsresult rv; 
        nsCOMPtr<nsIComponentRegistrar> registrar = do_QueryInterface(aCompMgr, &rv);
        if (registrar)
             rv = registrar->UnregisterFactoryLocation(cp->mCID, aPath);
        if (NS_FAILED(rv)) {
#ifdef DEBUG
            printf_stderr("nsGenericModule %s: unable to unregister %s component => %x\n",
                   mModuleName, cp->mDescription, rv);
#endif
        }
        cp++;
    }

    return NS_OK;
}

NS_IMETHODIMP
nsGenericModule::CanUnload(nsIComponentManager *aCompMgr, PRBool *okToUnload)
{
    if (!okToUnload) {
        return NS_ERROR_INVALID_POINTER;
    }
    *okToUnload = PR_FALSE;
    return NS_ERROR_FAILURE;
}

NS_COM_GLUE nsresult
NS_NewGenericModule2(nsModuleInfo const *info, nsIModule* *result)
{
    nsresult rv = NS_OK;

    // Create and initialize the module instance
    nsGenericModule *m = 
        new nsGenericModule(info->mModuleName, info->mCount, info->mComponents,
                            info->mCtor, info->mDtor);

    if (!m)
        return NS_ERROR_OUT_OF_MEMORY;

    // Increase refcnt and store away nsIModule interface to m in result
    NS_ADDREF(*result = m);
    return rv;
}

NS_COM_GLUE nsresult
NS_NewGenericModule(const char* moduleName,
                    PRUint32 componentCount,
                    nsModuleComponentInfo* components,
                    nsModuleDestructorProc dtor,
                    nsIModule* *result)
{
    nsModuleInfo info;
    memset(&info, 0, sizeof(info));

    info.mVersion    = NS_MODULEINFO_VERSION;
    info.mModuleName = moduleName;
    info.mComponents = components;
    info.mCount      = componentCount;
    info.mDtor       = dtor;

    return NS_NewGenericModule2(&info, result);
}

////////////////////////////////////////////////////////////////////////////////