[gdalsnes] 12924: add comments + small fix/change

add comments + small fix/change
Modified: trunk/reactos/include/pseh/prettybased.h
  _____  

Modified: trunk/reactos/include/pseh/prettybased.h
--- trunk/reactos/include/pseh/prettybased.h	2005-01-11 01:12:36 UTC
(rev 12923)
+++ trunk/reactos/include/pseh/prettybased.h	2005-01-11 01:47:35 UTC
(rev 12924)
@@ -39,8 +39,12 @@

 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:
 
 __TRY{
@@ -98,7 +102,7 @@
 {
  _SEHPortableFrame_t SEH_Header;
  _SEHJmpBuf_t SEH_JmpBuf;
-/* alternative: _SEHJmpBuf_t* SEH_JmpRetPtr; */
+ _SEHJmpBuf_t* SEH_JmpRetPtr;
 }
 _SEHFrame_t;
 
@@ -151,12 +155,8 @@
     
    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 @@
 #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 @@
    #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 @@
    #define __FINALLY ___FINALLY_SINGLE
    #define __ENDTRY ___ENDTRY
    #define __LEAVE break
+   #define __LEAVE2 break
 #endif