| Martin v. Löwis | fc03a94 | 2003-01-25 22:41:29 +0000 | [diff] [blame] | 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 | |
| Gregory P. Smith | 7c6309c | 2012-07-14 14:12:35 -0700 | [diff] [blame] | 23 | #if defined(__GNUC__) && defined(__i386__) && !defined(__MINGW32__) |
| Fred Drake | 08317ae | 2003-10-21 15:38:55 +0000 | [diff] [blame] | 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: |
| Martin v. Löwis | fc03a94 | 2003-01-25 22:41:29 +0000 | [diff] [blame] | 30 | #define FASTCALL __attribute__((stdcall, regparm(3))) |
| 31 | and let's try this: |
| 32 | */ |
| 33 | #define FASTCALL __attribute__((regparm(3))) |
| Martin v. Löwis | fc03a94 | 2003-01-25 22:41:29 +0000 | [diff] [blame] | 34 | #define PTRFASTCALL __attribute__((regparm(3))) |
| Fred Drake | 08317ae | 2003-10-21 15:38:55 +0000 | [diff] [blame] | 35 | #endif |
| Martin v. Löwis | fc03a94 | 2003-01-25 22:41:29 +0000 | [diff] [blame] | 36 | |
| Martin v. Löwis | fc03a94 | 2003-01-25 22:41:29 +0000 | [diff] [blame] | 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 | */ |
| Martin v. Löwis | fc03a94 | 2003-01-25 22:41:29 +0000 | [diff] [blame] | 44 | |
| Fred Drake | 08317ae | 2003-10-21 15:38:55 +0000 | [diff] [blame] | 45 | /* Make sure all of these are defined if they aren't already. */ |
| Martin v. Löwis | fc03a94 | 2003-01-25 22:41:29 +0000 | [diff] [blame] | 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 |