162 lines
5 KiB
C
162 lines
5 KiB
C
/* portab.h -- portability layer
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This file is part of the LZO real-time data compression library.
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Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer
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All Rights Reserved.
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The LZO library is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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The LZO library 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 for more details.
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You should have received a copy of the GNU General Public License
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along with the LZO library; see the file COPYING.
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If not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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Markus F.X.J. Oberhumer
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<markus@oberhumer.com>
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http://www.oberhumer.com/opensource/lzo/
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*/
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#include "lzo/lzoconf.h"
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#if (LZO_CC_MSC && (_MSC_VER >= 1000 && _MSC_VER < 1200))
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/* avoid `-W4' warnings in system header files */
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# pragma warning(disable: 4201 4214 4514)
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#endif
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#if (LZO_CC_MSC && (_MSC_VER >= 1300))
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/* avoid `-Wall' warnings in system header files */
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# pragma warning(disable: 4163 4255 4820)
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/* avoid warnings about inlining */
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# pragma warning(disable: 4710 4711)
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#endif
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#if (LZO_CC_MSC && (_MSC_VER >= 1400))
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/* avoid warnings when using "deprecated" POSIX functions */
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# pragma warning(disable: 4996)
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#endif
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#if (LZO_CC_PELLESC && (__POCC__ >= 290))
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# pragma warn(disable:2002)
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#endif
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/*************************************************************************
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//
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**************************************************************************/
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#if defined(__LZO_MMODEL_HUGE) || !(defined(LZO_LIBC_ISOC90) || defined(LZO_LIBC_ISOC99))
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#include "examples/portab_a.h"
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#else
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/* INFO:
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* The "portab_a.h" version above uses the ACC library to add
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* support for ancient systems (like 16-bit DOS) and to provide
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* some gimmicks like Windows high-resolution timers.
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* Still, on any halfway modern machine you can also use the
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* following pure ANSI-C code instead.
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*/
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#include <stddef.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <time.h>
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#if defined(CLK_TCK) && !defined(CLOCKS_PER_SEC)
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# define CLOCKS_PER_SEC CLK_TCK
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#endif
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#if defined(WANT_LZO_MALLOC)
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# define lzo_malloc(a) (malloc(a))
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# define lzo_free(a) (free(a))
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#endif
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#if defined(WANT_LZO_FREAD)
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# define lzo_fread(f,b,s) (fread(b,1,s,f))
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# define lzo_fwrite(f,b,s) (fwrite(b,1,s,f))
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#endif
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#if defined(WANT_LZO_UCLOCK)
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# define lzo_uclock_handle_t int
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# define lzo_uclock_t double
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# define lzo_uclock_open(a) ((void)(a))
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# define lzo_uclock_close(a) ((void)(a))
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# define lzo_uclock_read(a,b) *(b) = (clock() / (double)(CLOCKS_PER_SEC))
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# define lzo_uclock_get_elapsed(a,b,c) (*(c) - *(b))
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#endif
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#if defined(WANT_LZO_WILDARGV)
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# define lzo_wildargv(a,b) ((void)0)
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#endif
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#endif
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/*************************************************************************
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// misc
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**************************************************************************/
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/* turn on assertions */
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#undef NDEBUG
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#include <assert.h>
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/* just in case */
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#undef xmalloc
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#undef xfree
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#undef xread
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#undef xwrite
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#undef xputc
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#undef xgetc
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#undef xread32
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#undef xwrite32
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#if defined(WANT_LZO_UCLOCK)
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/* High quality benchmarking.
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*
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* Flush the CPU cache to get more accurate benchmark values.
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* This needs custom kernel patches. As a result - in combination with
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* the perfctr Linux kernel patches - accurate high-quality benchmarking
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* is possible.
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*
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* All other methods (rdtsc, QueryPerformanceCounter, gettimeofday, ...)
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* are completely unreliable for our purposes, and the only other
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* option is to boot into a legacy single-task operating system
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* like plain MSDOS and to directly reprogram the hardware clock.
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* [The djgpp2 port of the gcc compiler has support functions for this.]
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*
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* Also, for embedded systems it's best to benchmark by using a
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* CPU emulator/simulator software that can exactly count all
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* virtual clock ticks.
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*/
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#if !defined(lzo_uclock_flush_cpu_cache)
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# define lzo_uclock_flush_cpu_cache(h,flags) ((void)(h))
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#endif
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#endif
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/*
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vi:ts=4:et
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*/
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