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111 lines
4.7 KiB
C++
111 lines
4.7 KiB
C++
/*
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** autostart.cpp
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** This file contains the heads of lists stored in special data segments
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**
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**---------------------------------------------------------------------------
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** Copyright 1998-2006 Randy Heit
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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** The particular scheme used here was chosen because it's small.
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**
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** An alternative that will work with any C++ compiler is to use static
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** classes to build these lists at run time. Under Visual C++, doing things
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** that way can require a lot of extra space, which is why I'm doing things
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** this way.
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**
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** In the case of PClass lists (section creg), I orginally used the
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** constructor to do just that, and the code for that still exists if you
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** compile with something other than Visual C++ or GCC.
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*/
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#include "autosegs.h"
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#if defined(_MSC_VER)
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// The various reg sections are used to group pointers spread across multiple
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// source files into cohesive arrays in the final executable. We don't
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// actually care about these sections themselves and merge them all into
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// a single section during the final link. (.rdata is the standard section
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// for initialized read-only data.)
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#pragma comment(linker, "/merge:.areg=.rdata /merge:.creg=.rdata /merge:.freg=.rdata")
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#pragma comment(linker, "/merge:.greg=.rdata /merge:.yreg=.rdata")
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#pragma section(".areg$a",read)
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__declspec(allocate(".areg$a")) void *const ARegHead = 0;
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#pragma section(".creg$a",read)
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__declspec(allocate(".creg$a")) void *const CRegHead = 0;
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#pragma section(".freg$a",read)
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__declspec(allocate(".freg$a")) void *const FRegHead = 0;
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#pragma section(".greg$a",read)
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__declspec(allocate(".greg$a")) void *const GRegHead = 0;
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#pragma section(".yreg$a",read)
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__declspec(allocate(".yreg$a")) void *const YRegHead = 0;
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// We want visual styles support under XP
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#if defined _M_IX86
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#pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='x86' publicKeyToken='6595b64144ccf1df' language='*'\"")
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#elif defined _M_IA64
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#pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='ia64' publicKeyToken='6595b64144ccf1df' language='*'\"")
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#elif defined _M_X64
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#pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='amd64' publicKeyToken='6595b64144ccf1df' language='*'\"")
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#else
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#pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")
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#endif
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#elif defined(__GNUC__)
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#include "doomtype.h"
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// I don't know of an easy way to merge sections together with the GNU linker,
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// so GCC users will see all of these sections appear in the final executable.
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// (There are linker scripts, but that apparently involves extracting the
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// default script from ld and then modifying it.)
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void *const ARegHead __attribute__((section(SECTION_AREG))) = 0;
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void *const CRegHead __attribute__((section(SECTION_CREG))) = 0;
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void *const FRegHead __attribute__((section(SECTION_FREG))) = 0;
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void *const GRegHead __attribute__((section(SECTION_GREG))) = 0;
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void *const YRegHead __attribute__((section(SECTION_YREG))) = 0;
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#else
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#error Please fix autostart.cpp for your compiler
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#endif
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