release/src/router/lzo/examples/portab.h

   1 /* portab.h -- portability layer
   2
   3    This file is part of the LZO real-time data compression library.
   4
   5    Copyright (C) 2011 Markus Franz Xaver Johannes Oberhumer
   6    Copyright (C) 2010 Markus Franz Xaver Johannes Oberhumer
   7    Copyright (C) 2009 Markus Franz Xaver Johannes Oberhumer
   8    Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer
   9    Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer
  10    Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer
  11    Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer
  12    Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer
  13    Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer
  14    Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer
  15    Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer
  16    Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer
  17    Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer
  18    Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer
  19    Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer
  20    Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer
  21    All Rights Reserved.
  22
  23    The LZO library is free software; you can redistribute it and/or
  24    modify it under the terms of the GNU General Public License as
  25    published by the Free Software Foundation; either version 2 of
  26    the License, or (at your option) any later version.
  27
  28    The LZO library is distributed in the hope that it will be useful,
  29    but WITHOUT ANY WARRANTY; without even the implied warranty of
  30    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  31    GNU General Public License for more details.
  32
  33    You should have received a copy of the GNU General Public License
  34    along with the LZO library; see the file COPYING.
  35    If not, write to the Free Software Foundation, Inc.,
  36    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  37
  38    Markus F.X.J. Oberhumer
  39    <markus@oberhumer.com>
  40    http://www.oberhumer.com/opensource/lzo/
  41  */
  42
  43
  44 #include "lzo/lzoconf.h"
  45
  46 #if (LZO_CC_MSC && (_MSC_VER >= 1000 && _MSC_VER < 1200))
  47    /* avoid '-W4' warnings in system header files */
  48 #  pragma warning(disable: 4201 4214 4514)
  49 #endif
  50 #if (LZO_CC_MSC && (_MSC_VER >= 1300))
  51    /* avoid '-Wall' warnings in system header files */
  52 #  pragma warning(disable: 4163 4255 4820)
  53    /* avoid warnings about inlining */
  54 #  pragma warning(disable: 4710 4711)
  55 #endif
  56 #if (LZO_CC_MSC && (_MSC_VER >= 1400))
  57    /* avoid warnings when using "deprecated" POSIX functions */
  58 #  pragma warning(disable: 4996)
  59 #endif
  60 #if (LZO_CC_PELLESC && (__POCC__ >= 290))
  61 #  pragma warn(disable:2002)
  62 #endif
  63
  64
  65 /*************************************************************************
  66 //
  67 **************************************************************************/
  68
  69 #if defined(__LZO_MMODEL_HUGE) || defined(ACC_WANT_ACCLIB_GETOPT) || !(defined(LZO_LIBC_ISOC90) || defined(LZO_LIBC_ISOC99))
  70
  71 #include "examples/portab_a.h"
  72
  73 #else
  74
  75 /* INFO:
  76  *   The "portab_a.h" version above uses the ACC library to add
  77  *   support for ancient systems (like 16-bit DOS) and to provide
  78  *   some gimmicks like Windows high-resolution timers.
  79  *   Still, on any halfway modern machine you can also use the
  80  *   following pure ANSI-C code instead.
  81  */
  82
  83 #include <stddef.h>
  84 #include <stdlib.h>
  85 #include <stdio.h>
  86 #include <string.h>
  87 #include <ctype.h>
  88 #include <time.h>
  89 #if defined(CLK_TCK) && !defined(CLOCKS_PER_SEC)
  90 #  define CLOCKS_PER_SEC CLK_TCK
  91 #endif
  92
  93 #if defined(WANT_LZO_MALLOC)
  94 #  define lzo_malloc(a)         (malloc(a))
  95 #  define lzo_free(a)           (free(a))
  96 #endif
  97 #if defined(WANT_LZO_FREAD)
  98 #  define lzo_fread(f,b,s)      (fread(b,1,s,f))
  99 #  define lzo_fwrite(f,b,s)     (fwrite(b,1,s,f))
 100 #endif
 101 #if defined(WANT_LZO_UCLOCK)
 102 #  define lzo_uclock_handle_t   int
 103 #  define lzo_uclock_t          double
 104 #  define lzo_uclock_open(a)    ((void)(a))
 105 #  define lzo_uclock_close(a)   ((void)(a))
 106 #  define lzo_uclock_read(a,b)  *(b) = (clock() / (double)(CLOCKS_PER_SEC))
 107 #  define lzo_uclock_get_elapsed(a,b,c) (*(c) - *(b))
 108 #endif
 109 #if defined(WANT_LZO_WILDARGV)
 110 #  define lzo_wildargv(a,b)     ((void)0)
 111 #endif
 112
 113 #endif
 114
 115
 116 /*************************************************************************
 117 // misc
 118 **************************************************************************/
 119
 120 /* turn on assertions */
 121 #undef NDEBUG
 122 #include <assert.h>
 123
 124 /* just in case */
 125 #undef xmalloc
 126 #undef xfree
 127 #undef xread
 128 #undef xwrite
 129 #undef xputc
 130 #undef xgetc
 131 #undef xread32
 132 #undef xwrite32
 133
 134
 135 #if defined(WANT_XMALLOC)
 136 static lzo_voidp xmalloc(lzo_uint len)
 137 {
 138     lzo_voidp p;
 139     lzo_uint align = (lzo_uint) sizeof(lzo_align_t);
 140
 141     p = (lzo_voidp) lzo_malloc(len > 0 ? len : 1);
 142     if (p == NULL)
 143     {
 144         printf("%s: out of memory\n", progname);
 145         exit(1);
 146     }
 147     if (len >= align && __lzo_align_gap(p, align) != 0)
 148     {
 149         printf("%s: C library problem: malloc() returned misaligned pointer!\n", progname);
 150         exit(1);
 151     }
 152     return p;
 153 }
 154 #endif
 155
 156
 157 #if defined(WANT_LZO_UCLOCK)
 158
 159 /* High quality benchmarking.
 160  *
 161  * Flush the CPU cache to get more accurate benchmark values.
 162  * This needs custom kernel patches. As a result - in combination with
 163  * the perfctr Linux kernel patches - accurate high-quality benchmarking
 164  * is possible.
 165  *
 166  * All other methods (rdtsc, QueryPerformanceCounter, gettimeofday, ...)
 167  * are completely unreliable for our purposes, and the only other
 168  * option is to boot into a legacy single-task operating system
 169  * like plain MSDOS and to directly reprogram the hardware clock.
 170  * [The djgpp2 port of the gcc compiler has support functions for this.]
 171  *
 172  * Also, for embedded systems it's best to benchmark by using a
 173  * CPU emulator/simulator software that can exactly count all
 174  * virtual clock ticks.
 175  */
 176
 177 #if !defined(lzo_uclock_flush_cpu_cache)
 178 #  define lzo_uclock_flush_cpu_cache(h,flags)  ((void)(h))
 179 #endif
 180
 181 #endif
 182
 183
 184 /*
 185 vi:ts=4:et
 186 */
 187