Trait drone_core::token::Token[−][src]

pub unsafe trait Token: Sized + Send + 'static {
    unsafe fn take() -> Self;
}
[−]

A zero-sized affine type, at most one instance of which ever exists.

The above properties can’t be expressed with Rust type-system, therefore the trait is marked unsafe, and it is the implementer responsibility to keep the following invariants:

  1. The type must not implement Clone.
  2. The type must be instantiated only inside Token::take method.
  3. The type must be zero-sized.

Required methods

unsafe fn take() -> Self[src][−]

Creates the token instance.

Safety

At most one instance of the token must ever exist. This invariant can’t be expressed with Rust type-system, therefore the method is marked unsafe, and it is the caller responsibility to keep the invariant.

It is recommended to call this method at the very beginning of the program and pass the instance further to the code.

Since the type is ZST, the method is no-op from the assembly perspective. Likewise passing the instance around doesn’t consume the stack, and storing the instance inside other types doesn’t consume the memory.

Implementors

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Cyccnt<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Privmask<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Busy<_T> where
    _T: RegTag, 

impl<_T> Token for TraceBusID<_T> where
    _T: RegTag, 

impl<_T> Token for Gtsfreq<_T> where
    _T: RegTag, 

impl<_T> Token for Tsprescale<_T> where
    _T: RegTag, 

impl<_T> Token for Swoena<_T> where
    _T: RegTag, 

impl<_T> Token for Txena<_T> where
    _T: RegTag, 

impl<_T> Token for Syncena<_T> where
    _T: RegTag, 

impl<_T> Token for Tsena<_T> where
    _T: RegTag, 

impl<_T> Token for Itmena<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Unlock<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Implementer<_T> where
    _T: RegTag, 

impl<_T> Token for Variant<_T> where
    _T: RegTag, 

impl<_T> Token for Architecture<_T> where
    _T: RegTag, 

impl<_T> Token for Partno<_T> where
    _T: RegTag, 

impl<_T> Token for Revision<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Nmipendset<_T> where
    _T: RegTag, 

impl<_T> Token for Pendsvset<_T> where
    _T: RegTag, 

impl<_T> Token for Pendsvclr<_T> where
    _T: RegTag, 

impl<_T> Token for Pendstset<_T> where
    _T: RegTag, 

impl<_T> Token for Pendstclr<_T> where
    _T: RegTag, 

impl<_T> Token for Isrpending<_T> where
    _T: RegTag, 

impl<_T> Token for Vectpending<_T> where
    _T: RegTag, 

impl<_T> Token for Rettobase<_T> where
    _T: RegTag, 

impl<_T> Token for Vectactive<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Tbloff<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Vectkey<_T> where
    _T: RegTag, 

impl<_T> Token for Endianess<_T> where
    _T: RegTag, 

impl<_T> Token for Prigroup<_T> where
    _T: RegTag, 

impl<_T> Token for Sysresetreq<_T> where
    _T: RegTag, 

impl<_T> Token for Vectclractive<_T> where
    _T: RegTag, 

impl<_T> Token for Vectreset<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Seveonpend<_T> where
    _T: RegTag, 

impl<_T> Token for Sleepdeep<_T> where
    _T: RegTag, 

impl<_T> Token for Sleeponexit<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Stkalign<_T> where
    _T: RegTag, 

impl<_T> Token for Bfhfnmign<_T> where
    _T: RegTag, 

impl<_T> Token for Div0Trp<_T> where
    _T: RegTag, 

impl<_T> Token for UnalignTrp<_T> where
    _T: RegTag, 

impl<_T> Token for Usersetmpend<_T> where
    _T: RegTag, 

impl<_T> Token for Nonbasethrdena<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for PriUsageFault<_T> where
    _T: RegTag, 

impl<_T> Token for PriBusFault<_T> where
    _T: RegTag, 

impl<_T> Token for PriMemManage<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for PriSvCall<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for PriSysTick<_T> where
    _T: RegTag, 

impl<_T> Token for PriPendSv<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Usgfaultena<_T> where
    _T: RegTag, 

impl<_T> Token for Busfaultena<_T> where
    _T: RegTag, 

impl<_T> Token for Memfaultena<_T> where
    _T: RegTag, 

impl<_T> Token for Svcallpended<_T> where
    _T: RegTag, 

impl<_T> Token for Busfaultpended<_T> where
    _T: RegTag, 

impl<_T> Token for Memfaultpended<_T> where
    _T: RegTag, 

impl<_T> Token for Usgfaultpended<_T> where
    _T: RegTag, 

impl<_T> Token for Systickact<_T> where
    _T: RegTag, 

impl<_T> Token for Pendsvact<_T> where
    _T: RegTag, 

impl<_T> Token for Monitoract<_T> where
    _T: RegTag, 

impl<_T> Token for Svcallact<_T> where
    _T: RegTag, 

impl<_T> Token for Usgfaultact<_T> where
    _T: RegTag, 

impl<_T> Token for Busfaultact<_T> where
    _T: RegTag, 

impl<_T> Token for Memfaultact<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Mmarvalid<_T> where
    _T: RegTag, 

impl<_T> Token for Mlsperr<_T> where
    _T: RegTag, 

impl<_T> Token for Mstkerr<_T> where
    _T: RegTag, 

impl<_T> Token for Munstkerr<_T> where
    _T: RegTag, 

impl<_T> Token for Daccviol<_T> where
    _T: RegTag, 

impl<_T> Token for Iaccviol<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Bfarvalid<_T> where
    _T: RegTag, 

impl<_T> Token for Lsperr<_T> where
    _T: RegTag, 

impl<_T> Token for Stkerr<_T> where
    _T: RegTag, 

impl<_T> Token for Unstkerr<_T> where
    _T: RegTag, 

impl<_T> Token for Impreciserr<_T> where
    _T: RegTag, 

impl<_T> Token for Preciserr<_T> where
    _T: RegTag, 

impl<_T> Token for Ibuserr<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Divbyzero<_T> where
    _T: RegTag, 

impl<_T> Token for Unaligned<_T> where
    _T: RegTag, 

impl<_T> Token for Nocp<_T> where
    _T: RegTag, 

impl<_T> Token for Invpc<_T> where
    _T: RegTag, 

impl<_T> Token for Invstate<_T> where
    _T: RegTag, 

impl<_T> Token for Undefinstr<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Debugevt<_T> where
    _T: RegTag, 

impl<_T> Token for Forced<_T> where
    _T: RegTag, 

impl<_T> Token for Vecttbl<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for External<_T> where
    _T: RegTag, 

impl<_T> Token for Vcatch<_T> where
    _T: RegTag, 

impl<_T> Token for Dwttrap<_T> where
    _T: RegTag, 

impl<_T> Token for Bkpt<_T> where
    _T: RegTag, 

impl<_T> Token for Halted<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Address<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Address<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Impdef<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Trcena<_T> where
    _T: RegTag, 

impl<_T> Token for MonReq<_T> where
    _T: RegTag, 

impl<_T> Token for MonStep<_T> where
    _T: RegTag, 

impl<_T> Token for MonPend<_T> where
    _T: RegTag, 

impl<_T> Token for MonEn<_T> where
    _T: RegTag, 

impl<_T> Token for VcHarderr<_T> where
    _T: RegTag, 

impl<_T> Token for VcInterr<_T> where
    _T: RegTag, 

impl<_T> Token for VcBuserr<_T> where
    _T: RegTag, 

impl<_T> Token for VcStaterr<_T> where
    _T: RegTag, 

impl<_T> Token for VcChkerr<_T> where
    _T: RegTag, 

impl<_T> Token for VcNocperr<_T> where
    _T: RegTag, 

impl<_T> Token for VcMmerr<_T> where
    _T: RegTag, 

impl<_T> Token for VcCorereset<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Countflag<_T> where
    _T: RegTag, 

impl<_T> Token for Clksource<_T> where
    _T: RegTag, 

impl<_T> Token for Tickint<_T> where
    _T: RegTag, 

impl<_T> Token for Enable<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Reload<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Current<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Noref<_T> where
    _T: RegTag, 

impl<_T> Token for Skew<_T> where
    _T: RegTag, 

impl<_T> Token for Tenms<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Swoscaler<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for Txmode<_T> where
    _T: RegTag, 

impl<_T: RegTag> Token for Reg<_T>

impl<_T> Token for TrigIn<_T> where
    _T: RegTag, 

impl<_T> Token for EnFCont<_T> where
    _T: RegTag,