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__) && defined(__i386__)

    24 /* We'll use this version by default only where we know it helps.

    25 

    26    regparm() generates warnings on Solaris boxes.   See SF bug #692878.

    27 

    28    Instability reported with egcs on a RedHat Linux 7.3.

    29    Let's comment out:

    30    #define FASTCALL __attribute__((stdcall, regparm(3)))

    31    and let's try this:

    32 */

    33 #define FASTCALL __attribute__((regparm(3)))

    34 #define PTRFASTCALL __attribute__((regparm(3)))

    35 #endif

    36 

    37 /* Using __fastcall seems to have an unexpected negative effect under

    38    MS VC++, especially for function pointers, so we won't use it for

    39    now on that platform. It may be reconsidered for a future release

    40    if it can be made more effective.

    41    Likely reason: __fastcall on Windows is like stdcall, therefore

    42    the compiler cannot perform stack optimizations for call clusters.

    43 */

    44 

    45 /* Make sure all of these are defined if they aren't already. */

    46 

    47 #ifndef FASTCALL

    48 #define FASTCALL

    49 #endif

    50 

    51 #ifndef PTRCALL

    52 #define PTRCALL

    53 #endif

    54 

    55 #ifndef PTRFASTCALL

    56 #define PTRFASTCALL

    57 #endif

    58 

    59 #ifndef XML_MIN_SIZE

    60 #if !defined(__cplusplus) && !defined(inline)

    61 #ifdef __GNUC__

    62 #define inline __inline

    63 #endif /* __GNUC__ */

    64 #endif

    65 #endif /* XML_MIN_SIZE */

    66 

    67 #ifdef __cplusplus

    68 #define inline inline

    69 #else

    70 #ifndef inline

    71 #define inline

    72 #endif

    73 #endif