/Modules/expat/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__) && 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