2008-12-08 04:46:09 +00:00
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// Copyright (C) 2003-2008 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#ifndef _MEMARENA_H
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#define _MEMARENA_H
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#include "Common.h"
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// This class lets you create a block of anonymous RAM, and then arbitrarily map views into it.
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// Multiple views can mirror the same section of the block, which makes it very convient for emulating
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// memory mirrors.
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// Pass ensure_low_mem = true to CreateView if you want arbitrarily positioned views to end up in the low 2GB.
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class MemArena
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{
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public:
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void GrabLowMemSpace(size_t size);
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void ReleaseSpace();
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void* CreateView(s64 offset, size_t size, bool ensure_low_mem = false);
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void* CreateViewAt(s64 offset, size_t size, void* base);
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void ReleaseView(void* view, size_t size);
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// This only finds 1 GB in 32-bit
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static u8* Find4GBBase();
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private:
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#ifdef _WIN32
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HANDLE hMemoryMapping;
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#else
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int fd;
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#endif
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};
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#endif
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