Other Aliasns_calloc, ns_free, ns_malloc
ns_calloc(size_t num, size_t esize)
ns_realloc(void *ptr, size_t size)
The AOLserver memory storage allocation code was moved into Tcl core beginning with Tcl 8.4.0. Starting with AOLserver 3.5, these memory allocation functions are wrappers that call Tcl_Alloc and Tcl_Free. Earlier versions of AOLserver used this fast memory storage allocator internally, or the platform's memory allocator depending on how you configured it.
The actual amount of memory allocated or freed will be different from the requested amount. This is because the fast memory allocation code pools memory into chunks and manages that memory internally. In addition, the Tcl distribution may be compiled to allocate even more memory which is used internally for diagnostic reasons. Using ns_free to free memory created by routines other than ns_malloc, ns_realloc and ns_calloc will almost certainly result in segmentation faults or undefined behavior.
The lowercase and mixed-case versions are identical; the lowercase versions are preferred.
- ns_calloc(num, esize)
Allocates a block of memory that is num * esize large,
zeros it, and returns a pointer to the beginning of the memory block
or NULL if the operation fails.
ns_free() frees the memory space pointed to by ptr. This pointer
must have been created with a previous call to ns_malloc(), ns_calloc()
or ns_realloc(). If ptr is NULL, no operation is performed. ns_free()
returns no value.
ns_malloc() allocates size bytes and returns a pointer to the
allocated memory. The memory is not cleared. The value returned
is a pointer to the allocated memory or NULL if the request fails.
The memory must be freed by ns_free.
- ns_realloc(ptr, size)
ns_realloc changes the size of the memory block pointed to
by ptr to size bytes. The contents will be unchanged
to the minimum of the old and new sizes. Newly allocated memory
will be uninitialized. If ptr is NULL, the call is equivalent
to ns_malloc(size); if size is equal to zero, the
call is equivalent to ns_free(ptr). Unless ptr
is NULL, it must have been returned by an earlier call to
ns_malloc(), ns_calloc() or ns_realloc().