src/expat/lib/internal.h

   1 /* internal.h
   2
   3    Internal definitions used by Expat.  This is not needed to compile
   4    client code.
   5
   6    The following calling convention macros are defined for frequently
   7    called functions:
   8
   9    FASTCALL    - Used for those internal functions that have a simple
  10                  body and a low number of arguments and local variables.
  11
  12    PTRCALL     - Used for functions called though function pointers.
  13
  14    PTRFASTCALL - Like PTRCALL, but for low number of arguments.
  15
  16    inline      - Used for selected internal functions for which inlining
  17                  may improve performance on some platforms.
  18
  19    Note: Use of these macros is based on judgement, not hard rules,
  20          and therefore subject to change.
  21 */
  22
  23 #if defined(__GNUC__)
  24 /* Instability reported with egcs on a RedHat Linux 7.3.
  25    Let's comment it out:
  26    #define FASTCALL __attribute__((stdcall, regparm(3)))
  27    and let's try this:
  28 */
  29 #define FASTCALL __attribute__((regparm(3)))
  30 #define PTRCALL
  31 #define PTRFASTCALL __attribute__((regparm(3)))
  32
  33 #elif defined(WIN32)
  34 /* Using __fastcall seems to have an unexpected negative effect under
  35    MS VC++, especially for function pointers, so we won't use it for
  36    now on that platform. It may be reconsidered for a future release
  37    if it can be made more effective.
  38    Likely reason: __fastcall on Windows is like stdcall, therefore
  39    the compiler cannot perform stack optimizations for call clusters.
  40 */
  41 #ifdef FASTCALL
  42 #undef FASTCALL
  43 #endif
  44 #define FASTCALL
  45 #define PTRCALL
  46 #define PTRFASTCALL
  47
  48 #endif
  49
  50 #ifndef FASTCALL
  51 #define FASTCALL
  52 #endif
  53
  54 #ifndef PTRCALL
  55 #define PTRCALL
  56 #endif
  57
  58 #ifndef PTRFASTCALL
  59 #define PTRFASTCALL
  60 #endif
  61
  62 #ifndef XML_MIN_SIZE
  63 #if !defined(__cplusplus) && !defined(inline)
  64 #ifdef __GNUC__
  65 #define inline __inline
  66 #endif /* __GNUC__ */
  67 #endif
  68 #endif /* XML_MIN_SIZE */
  69
  70 #ifdef __cplusplus
  71 #define inline inline
  72 #else
  73 #ifndef inline
  74 #define inline
  75 #endif
  76 #endif