Struct Rseq 

pub struct Rseq { /* private fields */ }

The restartable sequence for the current thread.

This structure is used to store the restartable sequence information for the current thread. It is registered with the kernel when the thread is created and unregistered when the thread is destroyed.

Implementations

impl Rseq

pub unsafe fn get() -> Self

Returns the restartable sequence for the current thread.

Panics

Panics if the thread has not been registered for restartable sequences. See rseq_register_thread().

Safety

The returned object must not be used after the current thread calls rseq_unregister_thread().

pub unsafe fn try_get() -> Option<Self>

Returns the restartable sequence for the current thread if registered.

Safety

The returned object must not be used after the current thread calls rseq_unregister_thread().

pub fn as_ptr(&self) -> *mut zx_rseq_t

Returns a pointer to the zx_rseq_t structure.

The returned pointer is only valid until the current thread calls rseq_unregister_thread().

Useful for accessing the zx_rseq_t structure from inline assembly.

pub unsafe fn current_cpu(&self) -> u32

Reads the current CPU ID.

The current CPU can change at any time. Useful for preparing for a restartable sequence.

Safety

This method cannot be used after the current thread calls rseq_unregister_thread(). That invariant is required by the safety contract of get() as well.

pub unsafe fn activate( &self, critical_section: RseqCriticalSection, ) -> RseqScope

Activate a critical section.

The critical section is defined by the critical_section parameter. The critical section is active until the returned RseqScope is dropped.

Safety

The caller must ensure that the returned RseqScope is dropped before calling rseq_unregister_thread().

Trait Implementations

impl Clone for Rseq

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Rseq

impl Debug for Rseq

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

Formats the value using the given formatter.