tokio-executor 0.1.0

Future execution primitives


Task execution related traits and utilities.



In the Tokio execution model, futures are lazy. When a future is created, no work is performed. In order for the work defined by the future to happen, the future must be submitted to an executor. A future that is submitted to an executor is called a "task".

The executor is responsible for ensuring that [Future::poll] is called whenever the task is [notified]. Notification happens when the internal state of a task transitions from "not ready" to ready. For example, a socket might have received data and a call to read will now be able to succeed.

This crate provides traits and utilities that are necessary for building an executor, including:

  • The Executor trait describes the API for spawning a future onto an executor.

  • enter marks that the the current thread is entering an execution context. This prevents a second executor from accidentally starting from within the context of one that is already running.

  • DefaultExecutor spawns tasks onto the default executor for the current context.

  • Park abstracts over blocking and unblocking the current thread.


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