79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
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/*-----------------------------------------------------------------------------
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Microsoft Denali
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Microsoft Confidential
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Copyright 1996 Microsoft Corporation. All Rights Reserved.
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Component: Exception Handling
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File: Except.h
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Owner: DGottner
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Exception handling macros implemented via Win32 structured exceptions.
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Usage:
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TRY
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<try block>
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CATCH (<exception variable>)
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<exception handler>
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END_TRY
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To throw an exception use "THROW (<integer expression>)"
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To set up a termination handler use:
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TRY
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<try block>
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FINALLY
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<termination handler>
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END_TRY
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Rationale:
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This macro package offers a strict subset of Win32 structured exception
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handling. There is no support for exception filters (you have to rethrow
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exceptions), and no support for the resumption model of exception handling
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(though Win32 supports the resumption model)
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The purpose for these restrictions is to make it very easy to rewrite the
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exception handling macros for use with other exception throwing mechanisms.
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It would be easy to use this same interface with C++ exceptions or
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setjmp/longjmp.
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The braces with TRY, CATCH, and FINALLY are optional. Since this code is
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structured using self-bracketing constructs, the braces seem redundant.
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There is no need to declare the datatype of the <exception variable>
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because it is always an integer.
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-----------------------------------------------------------------------------*/
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#ifndef _EXCEPT_H
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#define _EXCEPT_H
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// Pragmas --------------------------------------------------------------------
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//
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// Turn off the "signed/unsigned conversion" warning off because it we get this
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// all the time that we throw an HRESULT. (which is a harmless thing) The
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// warning is usually benign anyway.
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#pragma warning(disable: 4245)
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// Macros ---------------------------------------------------------------------
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#define TRY __try {
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#define CATCH(nException) } __except(1) { DWORD nException = GetExceptionCode();
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#define FINALLY } __finally {
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#define END_TRY }
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#define THROW(nException) RaiseException(nException, 0, 0, NULL)
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#endif // _EXCEPT_H
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