111 lines
3.1 KiB
C++
111 lines
3.1 KiB
C++
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/***
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*ehvccctr.cpp - EH-aware version of copy constructor iterator helper function
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*
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* Copyright (c) 2000-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* These functions are called when constructing and destructing arrays of
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* objects. Their purpose is to assure that constructed elements get
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* destructed if the constructor for one of the elements throws.
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*
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* Must be compiled using "-d1Binl" to be able to specify __thiscall
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* at the user level
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*
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*Revision History:
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* 04-27-00 JJS File created
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*
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****/
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#include <cruntime.h>
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#include <eh.h>
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#if defined (_M_IX86)
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#define CALLTYPE __thiscall
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#else
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#define CALLTYPE __stdcall
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#endif
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#ifdef _WIN32
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void __stdcall __ArrayUnwind(
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void* ptr, // Pointer to array to destruct
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size_t size, // Size of each element (including padding)
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int count, // Number of elements in the array
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void(CALLTYPE *pDtor)(void*) // The destructor to call
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);
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void __stdcall __ehvec_copy_ctor(
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void* dst, // Pointer to destination array
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void* src, // Pointer to source array
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size_t size, // Size of each element (including padding)
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int count, // Number of elements in the array
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void(CALLTYPE *pCopyCtor)(void*,void*), // Constructor to call
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void(CALLTYPE *pDtor)(void*) // Destructor to call should exception be thrown
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){
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int i; // Count of elements constructed
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int success = 0;
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__try
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{
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// Construct the elements of the array
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for( i = 0; i < count; i++ )
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{
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(*pCopyCtor)( dst, src );
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dst = (char*)dst + size;
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src = (char*)src + size;
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}
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success = 1;
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}
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__finally
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{
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if (!success)
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__ArrayUnwind(dst, size, i, pDtor);
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}
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}
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#else
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void __stdcall __ehvec_copy_ctor(
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void* dst, // Pointer to destination array
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void* src, // Pointer to source array
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size_t size, // Size of each element (including padding)
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int count, // Number of elements in the array
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void(CALLTYPE *pCopyCtor)(void*, void*), // Constructor to call
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void(CALLTYPE *pDtor)(void*) // Destructor to call should exception be thrown
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){
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int i; // Count of elements constructed
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try
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{
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// Construct the elements of the array
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for( i = 0; i < count; i++ )
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{
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(*pCopyCtor)( dst, src );
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dst = (char*)dst + size;
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src = (char*)src + size;
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}
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}
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catch(...)
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{
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// If a constructor throws, unwind the portion of the array thus
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// far constructed.
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for( i--; i >= 0; i-- )
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{
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dst = (char*)dst - size;
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try {
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(*pDtor)(dst);
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}
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catch(...) {
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// If the destructor threw during the unwind, quit
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terminate();
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}
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}
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// Propagate the exception to surrounding frames
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throw;
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}
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}
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#endif
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