129 lines
3.5 KiB
C
129 lines
3.5 KiB
C
/*
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* Wine exception handling
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*
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* Copyright (c) 1999 Alexandre Julliard
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*/
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#ifndef __WINE_WINE_EXCEPTION_H
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#define __WINE_WINE_EXCEPTION_H
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#include <setjmp.h>
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#include "winnt.h"
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#include "thread.h"
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/* The following definitions allow using exceptions in Wine and Winelib code
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*
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* They should be used like this:
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*
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* __TRY()
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* {
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* do some stuff that can raise an exception
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* }
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* __EXCEPT(filter_func,param)
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* {
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* handle the exception here
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* }
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* __ENDTRY()
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*
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* or
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*
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* __TRY()
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* {
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* do some stuff that can raise an exception
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* }
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* __FINALLY(finally_func,param)
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*
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* The filter_func must be defined with the WINE_EXCEPTION_FILTER
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* macro, and return one of the EXCEPTION_* code; it can use
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* GetExceptionInformation and GetExceptionCode to retrieve the
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* exception info.
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*
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* The finally_func must be defined with the WINE_FINALLY_FUNC macro.
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*
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* Warning: you cannot use return, break, or continue inside a __TRY
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* or __EXCEPT block.
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*
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* -- AJ
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*/
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#define __TRY() \
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do { __WINE_FRAME __f; int __state = -1; \
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while (__state != 2) switch(__state) \
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{ case 0: /* try */
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#define __EXCEPT(func,arg) \
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__state = 2; break; \
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case -1: /* init */ \
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__f.frame.Handler = (PEXCEPTION_HANDLER)WINE_exception_handler; \
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__f.u.e.filter = (func); \
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__f.u.e.param = (LPVOID)(arg); \
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EXC_push_frame( &__f.frame ); \
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__state = setjmp( __f.u.e.jmp); \
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break; \
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case 1: /* except */
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#define __ENDTRY() \
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__state++; break; \
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} \
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EXC_pop_frame( &__f.frame ); \
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} while (0);
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#define __FINALLY(func,arg) \
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__state = 2; break; \
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case -1: /* init */ \
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__f.frame.Handler = (PEXCEPTION_HANDLER)WINE_finally_handler; \
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__f.u.f.finally_func = (func); \
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__f.u.f.param = (LPVOID)(arg); \
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EXC_push_frame( &__f.frame ); \
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__ENDTRY()
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#define WINE_EXCEPTION_FILTER(func,arg) DWORD WINAPI func( EXCEPTION_POINTERS *__eptr, LPVOID arg )
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#define WINE_FINALLY_FUNC(func,arg) void WINAPI func( LPVOID arg )
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#define GetExceptionInformation() (__eptr)
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#define GetExceptionCode() (__eptr->ExceptionRecord->ExceptionCode)
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typedef DWORD (*CALLBACK __WINE_FILTER)(PEXCEPTION_POINTERS,LPVOID);
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typedef void (*CALLBACK __WINE_FINALLY)(LPVOID);
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typedef struct
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{
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EXCEPTION_FRAME frame;
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union
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{
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struct /* exception data */
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{
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__WINE_FILTER filter;
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LPVOID param;
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jmp_buf jmp;
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} e;
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struct /* finally data */
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{
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__WINE_FINALLY finally_func;
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LPVOID param;
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} f;
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} u;
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} __WINE_FRAME;
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extern DWORD WINAPI WINE_exception_handler( PEXCEPTION_RECORD record, EXCEPTION_FRAME *frame,
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CONTEXT *context, LPVOID pdispatcher );
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extern DWORD WINAPI WINE_finally_handler( PEXCEPTION_RECORD record, EXCEPTION_FRAME *frame,
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CONTEXT *context, LPVOID pdispatcher );
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static inline EXCEPTION_FRAME *EXC_push_frame( EXCEPTION_FRAME *frame )
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{
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TEB * teb = NtCurrentTeb();
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frame->Prev = teb->except;
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teb->except = frame;
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return frame;
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}
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static inline EXCEPTION_FRAME *EXC_pop_frame( EXCEPTION_FRAME *frame )
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{
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NtCurrentTeb()->except = frame->Prev;
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return frame->Prev;
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}
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#endif /* __WINE_WINE_EXCEPTION_H */
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