Struct Statistics

pub struct Statistics { /* private fields */ }

Struct of WasmEdge Statistics.

Implementations

impl Statistics

pub fn create() -> WasmEdgeResult<Self>

Creates a new Statistics.

Error

If fail to create a Statistics, then an error is returned.

pub fn instr_count(&self) -> u64

Returns the instruction count in execution.

pub fn instr_per_sec(&self) -> f64

Returns the instruction count per second in execution.

Notice

For the following cases,

• Statistics is not enabled, or
• the total execution time is 0

The instructions per second could be NaN, which represents divided-by-zero. Use the is_nan function of F64 to check the return value before use it, for example,

use wasmedge_sys::Statistics;

// create a Statistics instance
let stat = Statistics::create().expect("fail to create a Statistics");

// check instruction count per second
assert!(stat.instr_per_sec().is_nan());

pub fn cost_in_total(&self) -> u64

Returns the total cost in execution.

pub fn set_cost_table(&mut self, cost_table: impl AsRef<[u64]>)

Sets the cost of instructions.

Arguments

• cost_table - The slice of cost table.

pub fn set_cost_limit(&mut self, limit: u64)

Sets the cost limit in execution.

Arguments

• limit - The cost limit.

pub fn clear(&mut self)

Clears the data in this statistics.

pub fn as_ptr(&self) -> *const WasmEdge_StatisticsContext

Available on crate feature ffi only.

Provides a raw pointer to the inner Statistics context.

Trait Implementations

impl Clone for Statistics

fn clone(&self) -> Statistics

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Statistics

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

Formats the value using the given formatter.

impl Drop for Statistics

fn drop(&mut self)

Executes the destructor for this type.