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Full Discussion: Will we get SEGV if we try to “delete []” un-initialized integer pointer variable.
Top Forums Programming Will we get SEGV if we try to “delete []” un-initialized integer pointer variable. Post 56229 by S.P.Prasad on Wednesday 29th of September 2004 10:21:11 AM
Old 09-29-2004
Though I am not sure of the exact reason but this could be a probable reason:

When we want to delete the contents of an array allocated with new[], we need to use the delete[] operator. Whether we have to use the delete or the delete[] operator - we need to tell this to compiler, cause for example an 'int*' could either point to a single integer, allocated using 'new int', or to an array of integers.

If we allocate an array of integers like int* var = new int[5];
then we should explicitly delete the array by calling delete [] var which would tell the compiler to free all the memory as held by the array.

Similarly there could be a problem if we allocate memory for a array element using new, and later try to de-allocate it using delete[]. We might get memory corruption - since compiler might try to delete whole memory for an entire array - while we have only allocated memory for a single element.
 

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LEARN ABOUT DEBIAN

ost_mempagerobject

ost::MemPagerObject(3)					     Library Functions Manual					    ost::MemPagerObject(3)

NAME

       ost::MemPagerObject -

       This class is used to create derived classes which are constructed within a memory pager pool.

SYNOPSIS

       #include <misc.h>

   Public Member Functions
       void * operator new (size_t size, MemPager &pager)
	   Allocate memory from a memory pager.
       void * operator new[] (size_t size, MemPager &pager)
	   Allocate array from a memory pager.
       void operator delete (void *)
	   Mempager delete does nothing; the pool purges.
       void operator delete[] (void *)
	   Array mempager delete does nothing; the pool purges.

Detailed Description
       This class is used to create derived classes which are constructed within a memory pager pool.

       create objects in a memory pager.

       Author:
	   David Sugar dyfet@ostel.com

Member Function Documentation
   void ost::MemPagerObject::operator delete (void *) [inline]
       Mempager delete does nothing; the pool purges.

   void ost::MemPagerObject::operator delete[] (void *) [inline]
       Array mempager delete does nothing; the pool purges.

   void* ost::MemPagerObject::operator new (size_tsize, MemPager &pager) [inline]
       Allocate memory from a memory pager. Parameters:
	   size of new passed from operator.
	   pager to allocate from.

   void* ost::MemPagerObject::operator new[] (size_tsize, MemPager &pager) [inline]
       Allocate array from a memory pager. Parameters:
	   size of new passed from operator.
	   pager to allocate from.

Author
       Generated automatically by Doxygen for GNU CommonC++ from the source code.

GNU CommonC++							  Sat Jun 23 2012					    ost::MemPagerObject(3)
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