mirror of
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74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
/*
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* InspIRCd -- Internet Relay Chat Daemon
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*
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* Copyright (C) 2013, 2022 Sadie Powell <sadie@witchery.services>
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* Copyright (C) 2013 Adam <Adam@anope.org>
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* Copyright (C) 2012 Robby <robby@chatbelgie.be>
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* Copyright (C) 2012 ChrisTX <xpipe@hotmail.de>
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* Copyright (C) 2009 John Brooks <john@jbrooks.io>
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* Copyright (C) 2007-2008 Craig Edwards <brain@inspircd.org>
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* Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
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* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
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*
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* This file is part of InspIRCd. InspIRCd is free software: you can
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* redistribute it and/or modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <exception>
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#include <new>
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#include <windows.h>
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/** On windows, all dll files and executables have their own private heap,
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* whereas on POSIX systems, shared objects loaded into an executable share
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* the executable's heap. This means that if we pass an arbitrary pointer to
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* a windows DLL which is not allocated in that dll, without some form of
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* marshalling, we get a page fault. To fix this, these overridden operators
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* new and delete use the windows HeapAlloc and HeapFree functions to claim
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* memory from the windows global heap. This makes windows 'act like' POSIX
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* when it comes to memory usage between dlls and exes.
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*/
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void * ::operator new(size_t iSize)
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{
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void* ptr = HeapAlloc(GetProcessHeap(), 0, iSize);
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/* This is the correct behaviour according to C++ standards for out of memory,
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* not returning null -- Brain
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*/
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if (!ptr)
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throw std::bad_alloc();
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else
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return ptr;
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}
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void ::operator delete(void * ptr)
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{
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if (ptr)
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HeapFree(GetProcessHeap(), 0, ptr);
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}
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void * operator new[] (size_t iSize)
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{
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void* ptr = HeapAlloc(GetProcessHeap(), 0, iSize);
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if (!ptr)
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throw std::bad_alloc();
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else
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return ptr;
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}
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void operator delete[] (void* ptr)
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{
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if (ptr)
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HeapFree(GetProcessHeap(), 0, ptr);
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}
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