119 lines
3.5 KiB
C++
119 lines
3.5 KiB
C++
/***
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*ehvecctr.cpp - EH-aware version of constructor iterator helper function
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*
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* Copyright (c) 1990-2001, 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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* 10-11-93 JDR Module created
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* 05-09-94 BES Module adapted for CRT source conventions
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* 05-13-94 SKS Remove _CRTIMP modifier
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* 10-10-94 CFW Fix EH/SEH exception handling.
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* 10-17-94 BWT Disable code for PPC.
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* 11-09-94 CFW Back out 10-10-94 change.
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* 02-08-95 JWM Mac merge.
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* 04-14-95 JWM Re-fix EH/SEH exception handling.
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* 04-17-95 JWM Restore non-WIN32 behavior.
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* 05-17-99 PML Remove all Macintosh support.
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* 05-20-99 PML Turn off __thiscall for IA64.
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* 07-12-99 RDL Image relative fixes under CC_P7_SOFT25.
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* 03-15-00 PML Remove CC_P7_SOFT25, which is now on permanently.
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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_ctor(
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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 *pCtor)(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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(*pCtor)( ptr );
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ptr = (char*)ptr + 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(ptr, size, i, pDtor);
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}
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}
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#else
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void __stdcall __ehvec_ctor(
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void* ptr, // Pointer to array to destruct
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unsigned 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 *pCtor)(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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(*pCtor)( ptr );
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ptr = (char*)ptr + 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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ptr = (char*)ptr - size;
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try {
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(*pDtor)(ptr);
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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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