mirror of
https://github.com/rn10950/RetroZilla.git
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313 lines
9.6 KiB
C++
313 lines
9.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org Code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Benjamin Smedberg <benjamin@smedbergs.us>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsXPCOMPrivate.h"
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#include "nsIComponentLoader.h"
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#include "nsIModule.h"
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#include "nsVoidArray.h"
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#include "pldhash.h"
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#include NEW_H
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#include "prlog.h"
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#ifdef PR_LOGGING
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static PRLogModuleInfo *sLog = PR_NewLogModule("StaticComponentLoader");
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#endif
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#define LOG(args) PR_LOG(sLog, PR_LOG_DEBUG, args)
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extern const char staticComponentType[];
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struct StaticModuleInfo : public PLDHashEntryHdr {
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nsStaticModuleInfo info;
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nsCOMPtr<nsIModule> module;
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// We want to autoregister the components in the order they come to us
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// in the static component list, so we keep a linked list.
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StaticModuleInfo *next;
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};
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class nsStaticComponentLoader : public nsIComponentLoader
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSICOMPONENTLOADER
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nsStaticComponentLoader() :
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mAutoRegistered(PR_FALSE),
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mFirst(nsnull)
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{ }
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nsresult Init(nsStaticModuleInfo const *aStaticModules,
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PRUint32 aModuleCount);
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private:
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~nsStaticComponentLoader() {
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if (mInfoHash.ops)
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PL_DHashTableFinish(&mInfoHash);
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}
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protected:
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nsresult GetInfoFor(const char *aLocation, StaticModuleInfo **retval);
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PRBool mAutoRegistered;
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nsCOMPtr<nsIComponentManager> mComponentMgr;
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PLDHashTable mInfoHash;
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static PLDHashTableOps sInfoHashOps;
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nsVoidArray mDeferredComponents;
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StaticModuleInfo *mFirst;
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};
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PR_STATIC_CALLBACK(void)
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info_ClearEntry(PLDHashTable *table, PLDHashEntryHdr *entry)
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{
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StaticModuleInfo *info = NS_STATIC_CAST(StaticModuleInfo *, entry);
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info->module = 0;
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info->~StaticModuleInfo();
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}
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PR_STATIC_CALLBACK(PRBool)
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info_InitEntry(PLDHashTable *table, PLDHashEntryHdr *entry, const void *key)
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{
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// Construct so that our nsCOMPtr is zeroed, etc.
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new (NS_STATIC_CAST(void *, entry)) StaticModuleInfo();
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return PR_TRUE;
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}
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/* static */ PLDHashTableOps nsStaticComponentLoader::sInfoHashOps = {
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PL_DHashAllocTable, PL_DHashFreeTable,
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PL_DHashGetKeyStub, PL_DHashStringKey, PL_DHashMatchStringKey,
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PL_DHashMoveEntryStub, info_ClearEntry,
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PL_DHashFinalizeStub, info_InitEntry
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};
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NS_IMPL_THREADSAFE_ISUPPORTS1(nsStaticComponentLoader, nsIComponentLoader)
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nsresult
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nsStaticComponentLoader::Init(nsStaticModuleInfo const *aStaticModules,
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PRUint32 aModuleCount)
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{
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if (!PL_DHashTableInit(&mInfoHash, &sInfoHashOps, nsnull,
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sizeof(StaticModuleInfo), 1024)) {
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mInfoHash.ops = nsnull;
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return NS_ERROR_OUT_OF_MEMORY;
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}
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if (! aStaticModules)
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return NS_OK;
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StaticModuleInfo *prev = nsnull;
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for (PRUint32 i = 0; i < aModuleCount; ++i) {
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StaticModuleInfo *info =
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NS_STATIC_CAST(StaticModuleInfo *,
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PL_DHashTableOperate(&mInfoHash, aStaticModules[i].name,
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PL_DHASH_ADD));
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if (!info)
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return NS_ERROR_OUT_OF_MEMORY;
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info->info = aStaticModules[i];
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if (prev)
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prev->next = info;
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else
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mFirst = info;
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prev = info;
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}
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return NS_OK;
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}
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nsresult
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nsStaticComponentLoader::GetInfoFor(const char *aLocation,
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StaticModuleInfo **retval)
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{
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nsresult rv;
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StaticModuleInfo *info =
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NS_STATIC_CAST(StaticModuleInfo *,
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PL_DHashTableOperate(&mInfoHash, aLocation,
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PL_DHASH_LOOKUP));
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if (PL_DHASH_ENTRY_IS_FREE(info))
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return NS_ERROR_FACTORY_NOT_REGISTERED;
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if (!info->module) {
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rv = info->info.getModule(mComponentMgr, nsnull,
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getter_AddRefs(info->module));
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LOG(("nSCL: GetInfoFor(\"%s\"): %lx\n", aLocation, rv));
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if (NS_FAILED(rv))
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return rv;
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}
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*retval = info;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsStaticComponentLoader::Init(nsIComponentManager *mgr, nsISupports *aReg)
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{
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mComponentMgr = mgr;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsStaticComponentLoader::AutoRegisterComponents(PRInt32 when, nsIFile *dir)
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{
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if (mAutoRegistered)
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return NS_OK;
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// if a directory has been explicitly specified, then return early. we
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// don't load static components from disk ;)
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if (dir)
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return NS_OK;
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nsresult rv;
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StaticModuleInfo *info = mFirst;
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while (info) {
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if (!info->module) {
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rv = info->info.getModule(mComponentMgr, nsnull, getter_AddRefs(info->module));
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LOG(("nSCL: getModule(\"%s\"): %lx\n", info->info.name, rv));
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if (NS_FAILED(rv) || !info->module)
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continue; // oh well
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}
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rv = info->module->RegisterSelf(mComponentMgr, nsnull, info->info.name,
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staticComponentType);
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LOG(("nSCL: autoreg of \"%s\": %lx\n", info->info.name, rv));
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if (rv == NS_ERROR_FACTORY_REGISTER_AGAIN)
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mDeferredComponents.AppendElement(info);
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info = info->next;
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}
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mAutoRegistered = PR_TRUE;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsStaticComponentLoader::AutoUnregisterComponent(PRInt32 when,
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nsIFile *component,
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PRBool *retval)
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{
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*retval = PR_FALSE;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsStaticComponentLoader::AutoRegisterComponent(PRInt32 when, nsIFile *component,
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PRBool *retval)
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{
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*retval = PR_FALSE;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsStaticComponentLoader::RegisterDeferredComponents(PRInt32 when,
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PRBool *aRegistered)
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{
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*aRegistered = PR_FALSE;
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if (!mDeferredComponents.Count())
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return NS_OK;
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for (int i = mDeferredComponents.Count() - 1; i >= 0; i--) {
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StaticModuleInfo *info = NS_STATIC_CAST(StaticModuleInfo *,
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mDeferredComponents[i]);
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nsresult rv = info->module->RegisterSelf(mComponentMgr, nsnull,
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info->info.name,
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staticComponentType);
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if (rv != NS_ERROR_FACTORY_REGISTER_AGAIN) {
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if (NS_SUCCEEDED(rv))
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*aRegistered = PR_TRUE;
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mDeferredComponents.RemoveElementAt(i);
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}
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsStaticComponentLoader::OnRegister(const nsCID &aCID, const char *aType,
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const char *aClassName,
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const char *aContractID,
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const char *aLocation,
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PRBool aReplace, PRBool aPersist)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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nsStaticComponentLoader::UnloadAll(PRInt32 aWhen)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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nsStaticComponentLoader::GetFactory(const nsCID &aCID, const char *aLocation,
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const char *aType, nsIFactory **_retval)
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{
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StaticModuleInfo *info;
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nsresult rv;
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if (NS_FAILED(rv = GetInfoFor(aLocation, &info)))
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return rv;
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return info->module->GetClassObject(mComponentMgr, aCID,
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NS_GET_IID(nsIFactory),
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(void **)_retval);
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}
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nsresult
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NewStaticComponentLoader(nsStaticModuleInfo const *aStaticModules,
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PRUint32 aStaticModuleCount,
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nsIComponentLoader **retval)
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{
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nsCOMPtr<nsStaticComponentLoader> lthis = new nsStaticComponentLoader();
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if (!lthis)
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return NS_ERROR_OUT_OF_MEMORY;
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nsresult rv = ((nsStaticComponentLoader*) lthis)->
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Init(aStaticModules, aStaticModuleCount);
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if (NS_FAILED(rv))
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return rv;
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NS_ADDREF(*retval = lthis);
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return NS_OK;
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}
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