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add comments + small fix/change

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svn path=/trunk/; revision=12924
This commit is contained in:
Gunnar Dalsnes 2005-01-11 01:47:35 +00:00
parent 5c84018967
commit b885ecfa57
1 changed files with 9 additions and 8 deletions
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17
reactos/include/pseh/prettybased.h
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@ -39,6 +39,10 @@ on this to access external variables
to prevent variables from being optimized into registers.
See: http://alphalinux.org/archives/axp-list/1998/February1998/0330.html
-you can't use return within a try/except/finally block
-you can't use __LEAVE within a (for/do/while) loop. it will only leave the loop
and not the try-block itself
USAGE:
@ -98,7 +102,7 @@ typedef struct __SEHFrame
{
_SEHPortableFrame_t SEH_Header;
_SEHJmpBuf_t SEH_JmpBuf;
/* alternative: _SEHJmpBuf_t* SEH_JmpRetPtr; */
_SEHJmpBuf_t* SEH_JmpRetPtr;
}
_SEHFrame_t;
@ -151,12 +155,8 @@ void __stdcall _FinallyPretty
if(_SEHSetJmp(jmpRetBuf) == 0)
{
_SEHLongJmp_KeepEsp(myframe->SEH_JmpBuf, (int)&jmpRetBuf);
/* alternative:
myframe->SEH_JmpRetPtr = &jmpRetBuf;
_SEHLongJmp_KeepEsp(myframe->SEH_JmpBuf, 2);
*/
}
}
@ -259,10 +259,9 @@ void __stdcall _FinallyPretty
#define ___ENDTRY \
} while (0); \
\
if (_ret > 1) \
if (_ret == 2) \
{ \
_SEHLongJmp(*((_SEHJmpBuf_t*)_ret), 1); \
/* alternative: _SEHLongJmp(*_SEHFrame->SEH_JmpRetPtr, 1); */ \
_SEHLongJmp(*_SEHFrame->SEH_JmpRetPtr, 1); \
} \
break; \
} \
@ -282,6 +281,7 @@ void __stdcall _FinallyPretty
#define __ENDTRY
#define _SEH_STATIC_FILTER(ACTION_) (ACTION_)
#define __LEAVE __leave
#define __LEAVE2 __leave
#else
#define __TRY2 ___TRY
#define __EXCEPT2 ___EXCEPT_DUAL
@ -292,6 +292,7 @@ void __stdcall _FinallyPretty
#define __FINALLY ___FINALLY_SINGLE
#define __ENDTRY ___ENDTRY
#define __LEAVE break
#define __LEAVE2 break
#endif