# Module core::ptr [−] [src]

Raw, unsafe pointers, `*const T`, and `*mut T`.

See also the pointer primitive types.

## Reexports

`pub use intrinsics::copy_nonoverlapping;`
`pub use intrinsics::copy;`
`pub use intrinsics::write_bytes;`
`pub use intrinsics::drop_in_place;`

## Structs

Shared | [Unstable] A wrapper around a raw non-null `*mut T` that indicates that the possessor of this wrapper has shared ownership of the referent. Useful for building abstractions like `Rc<T>` or `Arc<T>`, which internally use raw pointers to manage the memory that they own.
Unique | [Unstable] A wrapper around a raw non-null `*mut T` that indicates that the possessor of this wrapper owns the referent. This in turn implies that the `Unique<T>` is `Send`/`Sync` if `T` is `Send`/`Sync`, unlike a raw `*mut T` (which conveys no particular ownership semantics). It also implies that the referent of the pointer should not be modified without a unique path to the `Unique` reference. Useful for building abstractions like `Vec<T>` or `Box<T>`, which internally use raw pointers to manage the memory that they own.

## Functions

null | Creates a null raw pointer.
null_mut | Creates a null mutable raw pointer.
read | Reads the value from `src` without moving it. This leaves the memory in `src` unchanged.
replace | Replaces the value at `dest` with `src`, returning the old value, without dropping either.
swap | Swaps the values at two mutable locations of the same type, without deinitializing either. They may overlap, unlike `mem::swap` which is otherwise equivalent.
write | Overwrites a memory location with the given value without reading or dropping the old value.
read_and_drop | [Unstable]
read_volatile | [Unstable] Performs a volatile read of the value from `src` without moving it. This leaves the memory in `src` unchanged.
write_volatile | [Unstable] Performs a volatile write of a memory location with the given value without reading or dropping the old value.

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