# 1.28.0[−][src]Function alloc::alloc::realloc

    pub unsafe fn realloc(ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8

Reallocate memory with the global allocator.

This function forwards calls to the `GlobalAlloc::realloc` method of the allocator registered with the `#[global_allocator]` attribute if there is one, or the `std` crate’s default.

This function is expected to be deprecated in favor of the `realloc` method of the `Global` type when it and the `Alloc` trait become stable.

# Safety

See `GlobalAlloc::realloc`.

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