08-28-2011
You must free() the original pointer returned by malloc() without any arithmetic option to it.
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1. Programming
For example if i have the piece of code as follows:
CountryName = (char *)malloc((strlen(CountryName)+1)*sizeof(char));
memset(CountryName, 0, strlen(CountryName)+1);
CountryName = SOME VALUE
Now how do i free the memory after use of this code???? :confused: (3 Replies)
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2. AIX
Hi,
how to find free memory in aix? for installing oracle,I have used svmon but not getting proper output (1 Reply)
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Hi,
I want to know how to find out free physical memory in aix, (11 Replies)
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Hi,
Im working on Solaris 9 on SPARC-32 bit running on an Ultra-80, and I have to find out the following:-
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Hi all,
Could please let me know how to get the more memory free space (not added the RAM) in local zone.
-bash-3.00# vmstat 2 5
kthr memory page disk faults cpu
r b w swap free re mf pi po fr de sr s0 s1 s1 s1 in sy cs us sy... (3 Replies)
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6. Red Hat
hi, I have done the below, but am confused as to how much memory is "free"
please help
thanks
$ free
total used free shared buffers cached
Mem: 132033488 48827536 83205952 0 1007696 45404632
-/+ buffers/cache: 2415208 ... (7 Replies)
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I was running a program and it stopped and showed "Out of Memory!". at that time, the RAM used by this process is around 4G and the free memory size of the machine is around 30G. Does anybody know what maybe the reason? this program is written with Perl. the OS of the machine is Solaris U8. And I... (1 Reply)
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All,
AIX: 6.1 64 bits
How to find out Free memory available on AIX 6.1 64 bits
When I used :
svmon -G
size inuse free pin virtual mmode
memory 1048576 612109 191151 215969 549824 Ded-E
pg space 4325376 ... (1 Reply)
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Hi,
I am wondering if there is a way to free up memory in Solaris manually ? the way we can do it in Linux for example :
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free -m
sync
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If I understand your question correctly, you are asking for an explanation of Solaris memory manager. You'd better ask Oracle that question because you are talking about Solaris kernel internals.
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LEARN ABOUT HPUX
xtrealloc
XtRealloc() XtRealloc()
Name
XtRealloc - change the size of an allocated block of storage.
Synopsis
char *XtRealloc(ptr, num);
char *ptr;
Cardinal num;
Inputs
ptr Specifies a pointer to memory allocated with XtMalloc(), XtCalloc(), or XtRealloc(), or NULL.
num Specifies the new number of bytes of memory desired in the block.
Returns
A pointer to allocated memory.
Description
XtRealloc() changes the size of the block of allocated memory pointed to by ptr to be at least num bytes large. In order to make this size
change, it may have to allocate a new block of memory and copy the contents of the old block (or as much as will fit) into the new block.
If it allocates a new block of memory, it frees the old block. In either case, it returns a pointer to a block of memory which is of the
requested size. If there is insufficient memory to allocate the new block, XtRealloc() terminates by calling XtErrorMsg().
If ptr is NULL, XtRealloc() simply calls XtMalloc() to allocate a block of memory of the requested size.
Usage
Note that XtRealloc() may move the contents of your allocated memory to a new location; the return value may or may not be the same as ptr.
Not all memory can be safely reallocated. If there are multiple pointers to a block of memory scattered through out an application (such
as pointers to a widget record), then reallocating that memory is not safe, because all pointers to it cannot be updated. Other memory
(such as the array of children maintained privately by the Composite widget class) can be safely updated because there should be only one
pointer to it in the application (in this case the pointer is the composite.children field of the widget). These cautions are no different
than those required with the standard realloc() function.
In most cases, you will have to cast the return value of XtRealloc() to an appropriate pointer type.
Note that because XtRealloc() behaves like XtMalloc() when passed a NULL pointer, (something that realloc() does not do), you don't have to
write special case code to allocate the first chunk of memory with XtMalloc() and subsequent chunks with XtRealloc(); you can simply use
XtRealloc() everywhere.
Memory allocated with XtRealloc() must be deallocated with XtFree(). The function XtRealloc() is implemented by the Toolkit independently
of the particular environment, so programs ported to a system not supporting malloc will still work.
See Also
XtCalloc(1), XtFree(1), XtMalloc(1), XtNew(1), XtNewString(1).
Xt - Memory Allocation XtRealloc()