valloc - aligned memory allocator
Valloc is obsoleted by the current version of malloc, which aligns page-sized and larger allocations.
Valloc allocates size bytes aligned on a page boundary. It is implemented by calling malloc(3) with a slightly larger request, saving the
true beginning of the block allocated, and returning a properly aligned pointer.
Valloc returns a null pointer(0) if there is no available memory or if the arena has been detectably corrupted by storing outside the
bounds of a block.
Vfree isn't implemented.
3rd Berkeley Distribution May 12, 1986 VALLOC(3C)
Check Out this Related Man Page
MALLOC(3) Library Functions Manual MALLOC(3)NAME
malloc, free, realloc, calloc, alloca - memory allocator
char *realloc(ptr, size)
char *calloc(nelem, elsize)
unsigned nelem, elsize;
Malloc and free provide a general-purpose memory allocation package. Malloc returns a pointer to a block of at least size bytes beginning
on a word boundary.
The argument to free is a pointer to a block previously allocated by malloc; this space is made available for further allocation, but its
contents are left undisturbed.
Needless to say, grave disorder will result if the space assigned by malloc is overrun or if some random number is handed to free.
Malloc maintains multiple lists of free blocks according to size, allocating space from the appropriate list. It calls sbrk (see brk(2))
to get more memory from the system when there is no suitable space already free.
Realloc changes the size of the block pointed to by ptr to size bytes and returns a pointer to the (possibly moved) block. The contents
will be unchanged up to the lesser of the new and old sizes.
In order to be compatible with older versions, realloc also works if ptr points to a block freed since the last call of malloc, realloc or
calloc; sequences of free, malloc and realloc were previously used to attempt storage compaction. This procedure is no longer recommended.
Calloc allocates space for an array of nelem elements of size elsize. The space is initialized to zeros.
Alloca allocates size bytes of space in the stack frame of the caller. This temporary space is automatically freed on return.
Each of the allocation routines returns a pointer to space suitably aligned (after possible pointer coercion) for storage of any type of
object. If the space is of pagesize or larger, the memory returned will be page-aligned.
SEE ALSO brk(2), pagesize(2)DIAGNOSTICS
Malloc, realloc and calloc return a null pointer (0) if there is no available memory or if the arena has been detectably corrupted by stor-
ing outside the bounds of a block. Malloc may be recompiled to check the arena very stringently on every transaction; those sites with a
source code license may check the source code to see how this can be done.
When realloc returns 0, the block pointed to by ptr may be destroyed.
The current implementation of malloc does not always fail gracefully when system memory limits are approached. It may fail to allocate
memory when larger free blocks could be broken up, or when limits are exceeded because the size is rounded up. It is optimized for sizes
that are powers of two.
Alloca is machine dependent; its use is discouraged.
4th Berkeley Distribution May 14, 1986 MALLOC(3)
when I am compiling the cxx file on the system with compiler version (CC: Sun C++ 5.9 SunOS_sparc 2007/05/03) , I am facing the following error:-
/opt/SUNWspro/bin/CC -dy -misalign -xcode=abs64 -xarch=v9 -D__EXTENSIONS__ -Dsun4_R5=1 -I. -Isun4_R5_v... (0 Replies)
I have assignment to create script to compress file as .ZIP with password.
I don't know the command line in AIX. It's very new for me.
I'm try to use zip or tar but I don't have any option for encrypt with password.
Please kindly suggest me.
Thank you very much.
Multidev (7 Replies)
Writing a Tool to simulate non-sequential disk I/O (simulate db file sequential read) in C POSIX
I have over the years come across the same issue a couple of times, and it normally is that the read speed on SAN is absolutely atrocious when doing non-sequential I/O to the disks. Problem being of... (7 Replies)
I was hoping to test a bug posted by oracle, which indicates that the system may crash when using a zfs volume as a swap device. We moved swap away from zfs and over to raw disk devices in order to stop the crashes we've been experiencing.
What I wanted to do was to re-create the crash in a... (8 Replies)
Being a moderator at openATV, a forum for Linux settup boxes, I have seen reports, and sometimes am experiencing myself, artefacts during video playback or timeshift.
As the artefacts are non repetetive (rewinding and watching again does not show artefacts), I can exclude a corrupted video source.... (23 Replies)
anyone have any idea how do to this with auth_attr?
I suspect if I grant him
that will work but I'm unsure. Just looking for a second opinion. (10 Replies)