Function std::rt::heap::allocate   
            
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        [src]
pub unsafe fn allocate(size: usize, align: usize) -> *mut u8
Unstable
Return a pointer to size bytes of memory aligned to align.
On failure, return a null pointer.
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.