Trait Alloc 

pub trait Alloc: AllocErrorType + AllocMut {
    // Required method
    fn alloc(
        &self,
        layout: Layout,
    ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>;

    // Provided method
    fn zalloc(
        &self,
        layout: Layout,
    ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error> { ... }
}

A memory allocation interface.

Required Methods

fn alloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

Attempts to allocate a block of memory fitting the given Layout.

Errors

Errors are implementation-defined, refer to AllocErrorType::Error and Error.

The standard implementations may return:

• Err(Error::AllocFailed(layout, cause)) if allocation fails. cause is typically Cause::Unknown. If the os_err_reporting feature is enabled, it will be Cause::OSErr(oserr). In this case, oserr will be the error from last_os_error().raw_os_error().
• Err(Error::ZeroSizedLayout) if layout.size() == 0.

Provided Methods

fn zalloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

Attempts to allocate a zeroed block of memory fitting the given Layout.

Errors

Errors are implementation-defined, refer to AllocErrorType::Error and Error.

The standard implementations may return:

• Err(Error::AllocFailed(layout, cause)) if allocation fails. cause is typically Cause::Unknown. If the os_err_reporting feature is enabled, it will be Cause::OSErr(oserr). In this case, oserr will be the error from last_os_error().raw_os_error().
• Err(Error::ZeroSizedLayout) if layout.size() == 0.

Implementations on Foreign Types

impl Alloc for Global

Available on non-crate feature no_alloc only.

fn alloc(&self, layout: Layout) -> Result<NonNull<u8>, Error>

fn zalloc(&self, layout: Layout) -> Result<NonNull<u8>, Error>

impl Alloc for System

Available on crate feature std and non-crate feature no_alloc only.

fn alloc(&self, layout: Layout) -> Result<NonNull<u8>, Error>

fn zalloc(&self, layout: Layout) -> Result<NonNull<u8>, Error>

impl<A: AllocMut + ?Sized> Alloc for RefCell<A>

fn alloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

fn zalloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

impl<A: AllocMut + ?Sized> Alloc for Mutex<A>

fn alloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

fn zalloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

impl<A: AllocMut + ?Sized> Alloc for RwLock<A>

fn alloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

fn zalloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

impl<A: Alloc + ?Sized> Alloc for &A

fn alloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

fn zalloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

impl<A: Alloc + ?Sized> Alloc for &mut A

fn alloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

fn zalloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

impl<A: Alloc + ?Sized> Alloc for Box<A>

fn alloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

fn zalloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

impl<A: Alloc + ?Sized> Alloc for Rc<A>

fn alloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

fn zalloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

impl<A: Alloc + ?Sized> Alloc for Arc<A>

fn alloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

fn zalloc( &self, layout: Layout, ) -> Result<NonNull<u8>, <Self as AllocErrorType>::Error>

Implementors

impl Alloc for CAlloc

impl Alloc for DefaultAlloc

Available on non-crate feature no_alloc only.