Sweden-Number/include/wine/exception.h

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/*
* Wine exception handling
*
* Copyright (c) 1999 Alexandre Julliard
*/
#ifndef __WINE_WINE_EXCEPTION_H
#define __WINE_WINE_EXCEPTION_H
#include <setjmp.h>
#include "winnt.h"
#include "thread.h"
/* The following definitions allow using exceptions in Wine and Winelib code
*
* They should be used like this:
*
* __TRY
* {
* do some stuff that can raise an exception
* }
* __EXCEPT(filter_func,param)
* {
* handle the exception here
* }
* __ENDTRY
*
* or
*
* __TRY
* {
* do some stuff that can raise an exception
* }
* __FINALLY(finally_func,param)
*
* The filter_func must be defined with the WINE_EXCEPTION_FILTER
* macro, and return one of the EXCEPTION_* code; it can use
* GetExceptionInformation and GetExceptionCode to retrieve the
* exception info.
*
* The finally_func must be defined with the WINE_FINALLY_FUNC macro.
*
* Warning: inside a __TRY or __EXCEPT block, 'break' or 'continue' statements
* break out of the current block. 'return' causes disaster and must
* never be used.
*
* -- AJ
*/
/* Define this if you want to use your compiler built-in __try/__except support.
* This is only useful when compiling to a native Windows binary, as the built-in
* compiler exceptions will most certainly not work under Winelib.
*/
#ifdef USE_COMPILER_EXCEPTIONS
#define __TRY __try
#define __EXCEPT(func,arg) __except((func)(GetExceptionInformation(),GetExceptionCode(),(arg)))
#define __FINALLY(func,arg) __finally { (func)(!AbnormalTermination(),(arg)); }
#define __ENDTRY /*nothing*/
#else /* USE_COMPILER_EXCEPTIONS */
#define __TRY \
do { __WINE_FRAME __f; \
int __first = 1; \
for (;;) if (!__first) \
{ \
do {
#define __EXCEPT(func,arg) \
} while(0); \
EXC_pop_frame( &__f.frame ); \
break; \
} else { \
__f.frame.Handler = (PEXCEPTION_HANDLER)WINE_exception_handler; \
__f.u.e.filter = (func); \
__f.u.e.param = (LPVOID)(arg); \
EXC_push_frame( &__f.frame ); \
if (setjmp( __f.u.e.jmp)) { \
EXC_pop_frame( &__f.frame ); \
do {
#define __ENDTRY \
} while (0); \
break; \
} \
__first = 0; \
} \
} while (0);
#define __FINALLY(func,arg) \
} while(0); \
EXC_pop_frame( &__f.frame ); \
(func)( TRUE, (LPVOID)(arg) ); \
break; \
} else { \
__f.frame.Handler = (PEXCEPTION_HANDLER)WINE_finally_handler; \
__f.u.f.finally_func = (func); \
__f.u.f.param = (LPVOID)(arg); \
EXC_push_frame( &__f.frame ); \
__first = 0; \
} \
} while (0);
/* Dummy structure for using GetExceptionCode in filter as well as in handler */
typedef struct
{
union { struct { DWORD code; } e; } u;
} __WINE_DUMMY_FRAME;
typedef DWORD (*CALLBACK __WINE_FILTER)(PEXCEPTION_POINTERS,__WINE_DUMMY_FRAME,LPVOID);
typedef void (*CALLBACK __WINE_FINALLY)(BOOL,LPVOID);
#define WINE_EXCEPTION_FILTER(func,arg) \
DWORD WINAPI func( EXCEPTION_POINTERS *__eptr, __WINE_DUMMY_FRAME __f, LPVOID arg )
#define WINE_FINALLY_FUNC(func,arg) \
void WINAPI func( BOOL __normal, LPVOID arg )
#define GetExceptionInformation() (__eptr)
#define GetExceptionCode() (__f.u.e.code)
#define AbnormalTermination() (!__normal)
typedef struct
{
EXCEPTION_FRAME frame;
union
{
struct /* exception data */
{
__WINE_FILTER filter;
LPVOID param;
DWORD code;
jmp_buf jmp;
} e;
struct /* finally data */
{
__WINE_FINALLY finally_func;
LPVOID param;
} f;
} u;
} __WINE_FRAME;
extern DWORD WINAPI WINE_exception_handler( PEXCEPTION_RECORD record, EXCEPTION_FRAME *frame,
CONTEXT *context, LPVOID pdispatcher );
extern DWORD WINAPI WINE_finally_handler( PEXCEPTION_RECORD record, EXCEPTION_FRAME *frame,
CONTEXT *context, LPVOID pdispatcher );
#endif /* USE_COMPILER_EXCEPTIONS */
static inline EXCEPTION_FRAME *EXC_push_frame( EXCEPTION_FRAME *frame )
{
#if defined(__GNUC__) && defined(__i386__)
EXCEPTION_FRAME *prev;
__asm__ __volatile__(".byte 0x64\n\tmovl (0),%0"
"\n\tmovl %0,(%1)"
"\n\t.byte 0x64\n\tmovl %1,(0)"
: "=&r" (prev) : "r" (frame) : "memory" );
return prev;
#else
TEB * teb = NtCurrentTeb();
frame->Prev = teb->except;
teb->except = frame;
return frame->Prev;
#endif
}
static inline EXCEPTION_FRAME *EXC_pop_frame( EXCEPTION_FRAME *frame )
{
#if defined(__GNUC__) && defined(__i386__)
__asm__ __volatile__(".byte 0x64\n\tmovl %0,(0)"
: : "r" (frame->Prev) : "memory" );
return frame->Prev;
#else
NtCurrentTeb()->except = frame->Prev;
return frame->Prev;
#endif
}
#endif /* __WINE_WINE_EXCEPTION_H */