Trait SimpleExactSourceDescriptor 

pub trait SimpleExactSourceDescriptor: SourceCleanup {
    type Item;

    // Required method
    unsafe fn simple_exact_fetch_item(&self, index: usize) -> Self::Item;
}

A simple interface describing how to fetch items from an ExactParallelSource.

This is a variant of ExactSourceDescriptor where the ThreadContext parameter is ().

Required Associated Types

type Item

The type of items that this parallel source produces.

Required Methods

unsafe fn simple_exact_fetch_item(&self, index: usize) -> Self::Item

Fetch the item at the given index.

Safety

Given the length len returned by len() in SourceCleanup:

• indices passed to simple_exact_fetch_item() must be in the 0..len range,
• each index in 0..len must be present at most once in all indices passed to calls to simple_exact_fetch_item() and ranges passed to calls to SourceCleanup::cleanup_item_range().

It is therefore undefined behavior to call this function twice with the same index, with an index contained in a range for which cleanup_item_range() was invoked, etc.

You normally shouldn’t have to worry about this, because this API is intended to be called by Paralight’s internal multi-threading engine. This API is public to allow others to implement parallel sources: when implementing your own source(s), you can rely on these unsafe pre-conditions.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors