Function brk
Source pub unsafe extern "system" fn brk(brk: c_ulong) -> c_ulong
Expand description
brk() and sbrk() change the location of the program break, which
defines the end of the process’s data segment.
§RETURN VALUE
On success, brk() returns zero. On error, -1 is returned, and
errno is set to ENOMEM.
§ERRORS
ENOMEM(12), etc.
§Link
Read the docs
here