src/thirdparty/VirtualDub/h/vd2/system/seh.h

   1 //      VirtualDub - Video processing and capture application
   2 //      System library component
   3 //      Copyright (C) 1998-2004 Avery Lee, All Rights Reserved.
   4 //
   5 //      Beginning with 1.6.0, the VirtualDub system library is licensed
   6 //      differently than the remainder of VirtualDub.  This particular file is
   7 //      thus licensed as follows (the "zlib" license):
   8 //
   9 //      This software is provided 'as-is', without any express or implied
  10 //      warranty.  In no event will the authors be held liable for any
  11 //      damages arising from the use of this software.
  12 //
  13 //      Permission is granted to anyone to use this software for any purpose,
  14 //      including commercial applications, and to alter it and redistribute it
  15 //      freely, subject to the following restrictions:
  16 //
  17 //      1.      The origin of this software must not be misrepresented; you must
  18 //              not claim that you wrote the original software. If you use this
  19 //              software in a product, an acknowledgment in the product
  20 //              documentation would be appreciated but is not required.
  21 //      2.      Altered source versions must be plainly marked as such, and must
  22 //              not be misrepresented as being the original software.
  23 //      3.      This notice may not be removed or altered from any source
  24 //              distribution.
  25
  26 #ifndef f_VD2_SYSTEM_SEH_H
  27 #define f_VD2_SYSTEM_SEH_H
  28
  29 #include <vd2/system/vdtypes.h>
  30
  31 //////////////////////////////////////////////////////////////////////////////
  32 // Structured Exception Handling (SEH) macros.
  33 //
  34 // These are used for memory access operations that may be possibly invalid
  35 // and must be guarded. This is currently only supported on Win32/Win64
  36 // platforms with the VC++ compiler, since GCC does not currently support SEH.
  37 //
  38 // For cases where a memcpy() is the guarded operation, the VDMemcpyGuarded()
  39 // function should be used instead.
  40 //
  41 //////////////////////////////////////////////////////////////////////////////
  42
  43 #if defined(VD_COMPILER_MSVC) && defined(_WIN32)
  44         #include <excpt.h>
  45
  46         #define vd_seh_guard_try                __try
  47         #define vd_seh_guard_except             __except(GetExceptionCode() == STATUS_ACCESS_VIOLATION ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH)
  48 #else
  49         #define vd_seh_guard_try                if (true)
  50         #define vd_seh_guard_except             else
  51 #endif
  52
  53 #endif
  54