Flint

Flynn transfers the programming from the actuator model to Swift, providing a new level of security and performance for your highly parallel Swift code. Flynn is very inspired by Pony’s programming language. Here’s what you need to know:

Actuators are parallel safety classes Swift

The use of actors to separate parallel logic ensures safety, performance and efficiency.

Simultaneous course on the Datastore : Actor {
// Everything in this actuator is safe and cannot be accessed at the same time by
// any other private storage of the AC drive
: [String] [String] = [:]


}

Behaviour – asynchronous method calls

Actors provide behaviour (similar to a normal method call at the call site) that is performed asynchronously from the caller’s point of view.

let datastore = Competitor datastore()
datastore.beStore(Somekeys, SomeValues)

From an actor’s point of view, the behaviour is performed synchronously (in the same order as the call code).

Simultaneous course on the Datastore : Actors…
// The behavior is called asynchronously but executed synchronously on the _beStore private(_key : string, _value : string) {storage [key] = value}}.

Actors working on annexes

Unlike other attempts to bring the programming of actor models to Swift, Flynn does not use queued control rooms. Instead, Flynn includes a modified version of the Pony language. This makes Flynn’s actors much easier than those in DispatchQueues; you can send messages to millions of actors in an incredibly efficient way.

Using FlynnLint

Flynn provides frameworks for safe parallelism, but relies on you, the developer, to follow best practices for safe parallelism. FlynnLint helps you apply these best practices during the compilation phase. It protects you from many parallel traps and does not allow you to compile dangerous code:

In this example we have a public variable on our counter. Public variables are not allowed because they are accessible from other wires that violate the parallel security of the actor’s paradigm.

Remote agents are agents who work elsewhere

RemoteActors is an advanced topic that will probably only be useful for a subgroup of developers.

As of version 0.2 Flynn has a new type of actor – RemoteActor. RemoteActors behave like Actors; they have an internal state that is secured in parallel, and you communicate with them by naming behaviors. RemoteActors are designed to work outside your usual Flynn environment, usually a different process running on a different machine. Because RemoteActors works elsewhere, it is more limited than normal actors (for example, you cannot select an insecure access option for RemoteActors). See the RemoteActor documentation for more information.

Products

Actor-model programming for Swift

Actor-model programming for Swift

Did you publish anything with Flynn’s help? Let us know!

Equipment

Flynn is fully compatible with the Swift package manager.

SwiftPackage Manager

If you use rapidpm, you can add Flynn as an attachment directly to your Package.fast file.

Search: [
.package(url: https://github.com/KittyMac/Flynn.git, .upToNextMajor(from: 0.1.1)),
],

Xcode

To integrate it into Xcode, simply add it as a packet dependency by clicking on the following link

File -> Quick Packages -> Add a dependency to a package

and put a url in that storeroom. Follow the instructions to complete the addition of the dependency. Refer to the release page or select the main branch for the bleed edge.

Flynn is most effective in combination with FlynnLint. FlynnLint protects you from accidentally entering these races into your very parallel code by using the best Flynn programming methods.

HIGHLY RECOMMEND that you use FlynnLint!

FlynnLint is in the Flynn repository in the metamap. Just add a new phase of Run Script:

FLYNNLINTSWIFTPM=${SRCROOT}/.build/checkouts/flynn/meta/FlynnLint
FLYNNLINTXCODE=${{{BUILD_ROOT}/…/SourcePackages/checkouts/flynn/meta/FlynnLint

if [ -f ${FLYNNLINTSWIFTPM} ] ; then${FLYNNLINTSWIFTPM} ${SRCROOT} elif [ -f ${FLYNNLINTXCODE} ] ; then${FLYNNLINTXCODE}${SRCROOT} a further echo warning : It’s impossible to find Flynn ribbon, abortion…
fi

For example:

Actor-model programming for Swift

  • Place the FlynnLint design phase before the source compilation phase.
  • Place the FlynnLint construction phase in front of all other code lines.

FlynnLint manages all guides submitted as an argument. If you want to limit it to a subset of directories, all you have to do is make a list of each directory after you call FlynnLint. For example, if you use rapidpm and your source files are in /Sources and /Tests, only those folders are listed below:

${FLYNLINTSWIFTPM} ${SRCROOT}/Source ${SRCROOT}/Tests

GitHub

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