Access

polkavm_common::utils

Trait Access 

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pub trait Access<'a> {
    type Error: Display;

    // Required methods
    fn get_reg(&self, reg: Reg) -> u32;
    fn set_reg(&mut self, reg: Reg, value: u32);
    fn read_memory_into_slice<'slice, T>(
        &self,
        address: u32,
        buffer: &'slice mut T,
    ) -> Result<&'slice mut [u8], Self::Error>
       where T: ?Sized + AsUninitSliceMut;
    fn write_memory(
        &mut self,
        address: u32,
        data: &[u8],
    ) -> Result<(), Self::Error>;
    fn sbrk(&mut self, size: u32) -> Option<u32>;
    fn heap_size(&self) -> u32;
    fn program_counter(&self) -> Option<u32>;
    fn native_program_counter(&self) -> Option<u64>;
    fn gas_remaining(&self) -> Option<Gas>;
    fn consume_gas(&mut self, gas: u64);

    // Provided method
    fn read_memory_into_vec(
        &self,
        address: u32,
        length: u32,
    ) -> Result<Vec<u8>, Self::Error> { ... }
}

Required Associated Types§

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type Error: Display

Required Methods§

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fn get_reg(&self, reg: Reg) -> u32

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fn set_reg(&mut self, reg: Reg, value: u32)

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fn read_memory_into_slice<'slice, T>( &self, address: u32, buffer: &'slice mut T, ) -> Result<&'slice mut [u8], Self::Error>
where T: ?Sized + AsUninitSliceMut,

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fn write_memory(&mut self, address: u32, data: &[u8]) -> Result<(), Self::Error>

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fn sbrk(&mut self, size: u32) -> Option<u32>

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fn heap_size(&self) -> u32

Returns the current size of the program’s heap.

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fn program_counter(&self) -> Option<u32>

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fn native_program_counter(&self) -> Option<u64>

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fn gas_remaining(&self) -> Option<Gas>

Gets the amount of gas remaining, or None if gas metering is not enabled for this instance.

Note that this being zero doesn’t necessarily mean that the execution ran out of gas, if the program ended up consuming exactly the amount of gas that it was provided with!

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fn consume_gas(&mut self, gas: u64)

Provided Methods§

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fn read_memory_into_vec( &self, address: u32, length: u32, ) -> Result<Vec<u8>, Self::Error>

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§