Struct rustc_codegen_ssa::coverageinfo::ffi::Counter
source · #[repr(C)]pub struct Counter {
pub kind: CounterKind,
id: u32,
}
Expand description
A reference to an instance of an abstract “counter” that will yield a value in a coverage
report. Note that id
has different interpretations, depending on the kind
:
- For
CounterKind::Zero
,id
is assumed to be0
- For
CounterKind::CounterValueReference
,id
matches thecounter_id
of the injected instrumentation counter (theindex
argument to the LLVM intrinsicinstrprof.increment()
) - For
CounterKind::Expression
,id
is the index into the coverage map’s array of counter expressions. Aligns with llvm::coverage::Counter Important: The Rust struct layout (order and types of fields) must match its C++ counterpart.
Fields
kind: CounterKind
id: u32
Implementations
sourceimpl Counter
impl Counter
sourcepub fn zero() -> Self
pub fn zero() -> Self
Constructs a new Counter
of kind Zero
. For this CounterKind
, the
id
is not used.
sourcepub fn counter_value_reference(counter_id: CounterValueReference) -> Self
pub fn counter_value_reference(counter_id: CounterValueReference) -> Self
Constructs a new Counter
of kind CounterValueReference
, and converts
the given 1-based counter_id to the required 0-based equivalent for
the Counter
encoding.
sourcepub fn expression(mapped_expression_index: MappedExpressionIndex) -> Self
pub fn expression(mapped_expression_index: MappedExpressionIndex) -> Self
Constructs a new Counter
of kind Expression
.
sourcepub fn zero_based_id(&self) -> u32
pub fn zero_based_id(&self) -> u32
An explicitly-named function to get the ID value, making it more obvious that the stored value is now 0-based.
Trait Implementations
Auto Trait Implementations
impl RefUnwindSafe for Counter
impl Send for Counter
impl Sync for Counter
impl Unpin for Counter
impl UnwindSafe for Counter
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Layout
Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...)
attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.
Size: 8 bytes