Function alloc::heap::reallocate
[−]
[src]
pub unsafe fn reallocate(ptr: *mut u8, old_size: usize, size: usize, align: usize) -> *mut u8
Resize the allocation referenced by ptr
`ptrto
` to size
`size` bytes.
On failure, return a null pointer and leave the original allocation intact.
If the allocation was relocated, the memory at the passed-in pointer is undefined after the call.
Behavior is undefined if the requested size is 0 or the alignment is not a power of 2. The alignment must be no larger than the largest supported page size on the platform.
The old_size
`old_sizeand
` and align
`alignparameters are the parameters that were used to create the allocation referenced by
` parameters are the parameters that were used to
create the allocation referenced by ptr
`ptr. The
`. The old_size
`old_size` parameter may be
any value in range_inclusive(requested_size, usable_size).