If necessary, a new block is allocated, and data is copied to it. The space is initialized to zeros. The contents of the memory is undefined. They have minimal effect on the current Tru64 UNIX implementation of memory allocation. It must only be called after some storage has been allocated.
Information describing space usage is returned.
Tuning Memory Allocation Note See also the subsection Using the densemalloc Library for information on the densemalloc tuning variables. The behavior of these memory allocation functions can be tuned to optimize their performance in a particular application. The following variables control how the functions operate. Note that these variables and their effects are specific to the current Tru64 UNIX memory allocation implementation. The default values for these variables are specified by libc .