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A variant of runProcess which returns a value. This works just like runProcess by forking a new process with a captured MVar, but it will return the result of the computation. If the computation throws an exception, it will be re-thrown by fromProcess in the calling thread.

Represents a handle to a process runner that communicates through a Chan. Create with spawnProxy or spawnProxyIO. Use this to call process actions (using fromProxy or inProxy) from any IO that will be executed in a single process that will have a persistent pid and mailbox across invocations. Sharing a single proxy between threads may yield poor performance and is not advised.

Spawn a new process and return a ProcessProxy handle for it.

Same as spawnProxy but can be used from any IO

spawnProxyIO node = fromProcess node spawnProxy

Use a ProcessProxy created with spawnProxy to run a Process computation in the existing Process asynchronously.

Use a ProcessProxy created with spawnProxy to run a Process computation in the existing Process and return the result in any IO.