1 | /* internal.h |
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2 | |
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3 | Internal definitions used by Expat. This is not needed to compile |
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4 | client code. |
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5 | |
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6 | The following calling convention macros are defined for frequently |
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7 | called functions: |
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8 | |
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9 | FASTCALL - Used for those internal functions that have a simple |
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10 | body and a low number of arguments and local variables. |
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11 | |
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12 | PTRCALL - Used for functions called though function pointers. |
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13 | |
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14 | PTRFASTCALL - Like PTRCALL, but for low number of arguments. |
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15 | |
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16 | inline - Used for selected internal functions for which inlining |
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17 | may improve performance on some platforms. |
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18 | |
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19 | Note: Use of these macros is based on judgement, not hard rules, |
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20 | and therefore subject to change. |
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21 | */ |
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22 | |
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23 | #if defined(__GNUC__) && defined(__i386__) && !defined(__MINGW32__) |
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24 | /* We'll use this version by default only where we know it helps. |
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25 | |
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26 | regparm() generates warnings on Solaris boxes. See SF bug #692878. |
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27 | |
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28 | Instability reported with egcs on a RedHat Linux 7.3. |
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29 | Let's comment out: |
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30 | #define FASTCALL __attribute__((stdcall, regparm(3))) |
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31 | and let's try this: |
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32 | */ |
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33 | #define FASTCALL __attribute__((regparm(3))) |
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34 | #define PTRFASTCALL __attribute__((regparm(3))) |
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35 | #endif |
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36 | |
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37 | /* Using __fastcall seems to have an unexpected negative effect under |
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38 | MS VC++, especially for function pointers, so we won't use it for |
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39 | now on that platform. It may be reconsidered for a future release |
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40 | if it can be made more effective. |
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41 | Likely reason: __fastcall on Windows is like stdcall, therefore |
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42 | the compiler cannot perform stack optimizations for call clusters. |
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43 | */ |
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44 | |
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45 | /* Make sure all of these are defined if they aren't already. */ |
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46 | |
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47 | #ifndef FASTCALL |
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48 | #define FASTCALL |
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49 | #endif |
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50 | |
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51 | #ifndef PTRCALL |
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52 | #define PTRCALL |
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53 | #endif |
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54 | |
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55 | #ifndef PTRFASTCALL |
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56 | #define PTRFASTCALL |
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57 | #endif |
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58 | |
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59 | #ifndef XML_MIN_SIZE |
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60 | #if !defined(__cplusplus) && !defined(inline) |
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61 | #ifdef __GNUC__ |
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62 | #define inline __inline |
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63 | #endif /* __GNUC__ */ |
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64 | #endif |
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65 | #endif /* XML_MIN_SIZE */ |
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66 | |
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67 | #ifdef __cplusplus |
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68 | #define inline inline |
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69 | #else |
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70 | #ifndef inline |
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71 | #define inline |
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72 | #endif |
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73 | #endif |
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