gecko-dev/xpcom/components/nsStaticComponentLoader.cpp

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5.4 KiB
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/* -*- Mode: C++; tab-width: 8; 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) 2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Benjamin Smedberg <benjamin@smedbergs.us>
*
* 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 ***** */
#include "nsStaticComponentLoader.h"
#include "nsComponentManager.h"
#include "nsCOMPtr.h"
#include "pldhash.h"
#include "nsIModule.h"
#include NEW_H
#include "prlog.h"
#ifdef PR_LOGGING
static PRLogModuleInfo *sLog = PR_NewLogModule("StaticComponentLoader");
#endif
#define LOG(args) PR_LOG(sLog, PR_LOG_DEBUG, args)
extern const char staticComponentType[];
struct StaticModuleInfo : public PLDHashEntryHdr {
nsStaticModuleInfo info;
nsCOMPtr<nsIModule> module;
// We want to autoregister the components in the order they come to us
// in the static component list, so we keep a linked list.
StaticModuleInfo *next;
};
PR_STATIC_CALLBACK(void)
info_ClearEntry(PLDHashTable *table, PLDHashEntryHdr *entry)
{
StaticModuleInfo *info = NS_STATIC_CAST(StaticModuleInfo *, entry);
info->module = 0;
info->~StaticModuleInfo();
}
PR_STATIC_CALLBACK(PRBool)
info_InitEntry(PLDHashTable *table, PLDHashEntryHdr *entry, const void *key)
{
// Construct so that our nsCOMPtr is zeroed, etc.
new (NS_STATIC_CAST(void *, entry)) StaticModuleInfo();
return PR_TRUE;
}
/* static */ PLDHashTableOps nsStaticModuleLoader::sInfoHashOps = {
PL_DHashAllocTable, PL_DHashFreeTable,
PL_DHashGetKeyStub, PL_DHashStringKey, PL_DHashMatchStringKey,
PL_DHashMoveEntryStub, info_ClearEntry,
PL_DHashFinalizeStub, info_InitEntry
};
nsresult
nsStaticModuleLoader::Init(nsStaticModuleInfo const *aStaticModules,
PRUint32 aModuleCount)
{
if (!PL_DHashTableInit(&mInfoHash, &sInfoHashOps, nsnull,
sizeof(StaticModuleInfo), 1024)) {
mInfoHash.ops = nsnull;
return NS_ERROR_OUT_OF_MEMORY;
}
if (! aStaticModules)
return NS_OK;
StaticModuleInfo *prev = nsnull;
for (PRUint32 i = 0; i < aModuleCount; ++i) {
StaticModuleInfo *info =
NS_STATIC_CAST(StaticModuleInfo *,
PL_DHashTableOperate(&mInfoHash, aStaticModules[i].name,
PL_DHASH_ADD));
if (!info)
return NS_ERROR_OUT_OF_MEMORY;
info->info = aStaticModules[i];
if (prev)
prev->next = info;
else
mFirst = info;
prev = info;
}
return NS_OK;
}
void
nsStaticModuleLoader::EnumerateModules(StaticLoaderCallback cb,
nsTArray<DeferredModule> &deferred)
{
for (StaticModuleInfo *c = mFirst; c; c = c->next) {
if (!c->module) {
nsresult rv = c->info.
getModule(nsComponentManagerImpl::gComponentManager, nsnull,
getter_AddRefs(c->module));
LOG(("nSCL: EnumerateModules(): %lx\n", rv));
if (NS_FAILED(rv))
continue;
}
cb(c->info.name, c->module, deferred);
}
}
nsresult
nsStaticModuleLoader::GetModuleFor(const char *aLocation,
nsIModule* *aResult)
{
nsresult rv;
StaticModuleInfo *info =
NS_STATIC_CAST(StaticModuleInfo *,
PL_DHashTableOperate(&mInfoHash, aLocation,
PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_FREE(info))
return NS_ERROR_FACTORY_NOT_REGISTERED;
if (!info->module) {
rv = info->info.
getModule(nsComponentManagerImpl::gComponentManager, nsnull,
getter_AddRefs(info->module));
LOG(("nSCL: GetModuleForFor(\"%s\"): %lx\n", aLocation, rv));
if (NS_FAILED(rv))
return rv;
}
NS_ADDREF(*aResult = info->module);
return NS_OK;
}