Struct Span 

pub struct Span { /* private fields */ }

A memory reference returned by JitAllocator::alloc

Implementations

impl Span

pub const fn rx(&self) -> *const u8

Returns a pointer having Read & Execute permissions (references executable memory).

This pointer is never NULL if the allocation succeeded, it points to an executable memory.

pub const fn rw(&self) -> *mut u8

Returns a pointer having Read & Write permissions (references writable memory).

Depending on the type of the allocation strategy this could either be:

• the same address as returned by rx() if the allocator uses RWX mapping (pages have all of Read, Write, and Execute permissions) or MAP_JIT, which requires to call protect_jit_memory() manually.
• a valid pointer, but not the same as rx - this would be valid if dual mapping is used.
• NULL pointer, in case that the allocation strategy doesn’t use RWX, MAP_JIT, or dual mapping. In this case only JitAllocator can copy new code into the executable memory referenced by Span.

pub const fn size(&self) -> usize

pub fn is_icache_clean(&self) -> bool

pub fn is_directly_writeable(&self) -> bool

Trait Implementations

impl Clone for Span

fn clone(&self) -> Span

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Span

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Copy for Span