From 16f504a9dca3fe3b70568f67b7d41241ae485288 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 18:49:04 +0200 Subject: Adding upstream version 7.0.6-dfsg. Signed-off-by: Daniel Baumann --- src/libs/xpcom18a4/xpcom/io/nsFastLoadPtr.h | 112 ++++++++++++++++++++++++++++ 1 file changed, 112 insertions(+) create mode 100644 src/libs/xpcom18a4/xpcom/io/nsFastLoadPtr.h (limited to 'src/libs/xpcom18a4/xpcom/io/nsFastLoadPtr.h') diff --git a/src/libs/xpcom18a4/xpcom/io/nsFastLoadPtr.h b/src/libs/xpcom18a4/xpcom/io/nsFastLoadPtr.h new file mode 100644 index 00000000..0c832357 --- /dev/null +++ b/src/libs/xpcom18a4/xpcom/io/nsFastLoadPtr.h @@ -0,0 +1,112 @@ +/* -*- 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 FastLoad code. + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 2001 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * Brendan Eich (original author) + * + * 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 ***** */ + +#ifndef nsFastLoadPtr_h___ +#define nsFastLoadPtr_h___ + +/** + * Mozilla FastLoad file object pointer template type. + * + * Use nsFastLoadPtr rather than nsCOMPtr when declaring a strong XPCOM + * ref member of a data structure that's conditionally loaded at application + * startup. You must be willing to tolerate the null mRawPtr test on every + * dereference of this member pointer, or else copy it to a local to optimize + * away the cost. + */ + +#ifndef nsCOMPtr_h___ +#include "nsCOMPtr.h" +#endif + +#ifndef nsIFastLoadService_h___ +#include "nsIFastLoadService.h" +#endif + +#ifdef VBOX_WITH_XPCOM_NAMESPACE_CLEANUP +#define gFastLoadService_ VBoxNsxpgFastLoadService_ +#endif /* VBOX_WITH_XPCOM_NAMESPACE_CLEANUP */ + +/** + * nsFastLoadPtr is a template class, so we don't want a class static service + * pointer member declared in nsFastLoadPtr, above. Plus, we need special + * declaration magic to export data across DLL/DSO boundaries. So we use an + * old-fashioned global variable that refers weakly to the one true FastLoad + * service. This pointer is maintained by that singleton's ctor and dtor. + */ +PR_EXPORT_DATA(nsIFastLoadService*) gFastLoadService_; + +template +class nsFastLoadPtr : public nsCOMPtr { + public: + nsDerivedSafe* get() const { + if (!this->mRawPtr) { + gFastLoadService_->GetFastLoadReferent( + NS_REINTERPRET_CAST(nsISupports**, + &this->mRawPtr)); + } + return NS_REINTERPRET_CAST(nsDerivedSafe*, this->mRawPtr); + } + + /** + * Deserialize an nsFastLoadPtr from aInputStream, skipping the referent + * object, but saving the object's offset for later deserialization. + * + * Lowercase name _a la_ get, because it's called the same way -- not via + * operator->(). + */ + nsresult read(nsIObjectInputStream* aInputStream) { + return gFastLoadService_->ReadFastLoadPtr(aInputStream, + NS_REINTERPRET_CAST(nsISupports**, + &this->mRawPtr)); + } + + /** + * Serialize an nsFastLoadPtr reference and possibly the referent object, + * if that object has not yet been serialized. + * + * Lowercase name _a la_ get, because it's called the same way -- not via + * operator->(). + */ + nsresult write(nsIObjectOutputStream* aOutputStream) { + return gFastLoadService_->WriteFastLoadPtr(aOutputStream, + NS_REINTERPRET_CAST(nsISupports*, + this->mRawPtr)); + } +}; + +#endif // nsFastLoadPtr_h___ -- cgit v1.2.3