c56e5ad547
This repairs a bug regarding crashes in a new actor's boot-proc. Previously, if boot-proc raised an exception, the initial assertions would stick around forever. By changing adhoc-assertions to a bag rather than a set, and putting the initial assertions in the bag, we put them somewhere they are guaranteed to be processed during actor termination, even when an exception is signalled during boot. This is an API change wrt the previous Syndicate implementation: assert!/retract! now have bag semantics, not set semantics. We can add set-semantics APIs if we end up needing them, of course, layered on top of the bag implementation. |
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| README.md | ||
README.md
Syndicate: A Networked, Concurrent, Functional Programming Language
Syndicate is an actor-based concurrent language able to express communication, enforce isolation, and manage resources. Network-inspired extensions to a functional core represent imperative actions as values, giving side-effects locality and enabling composition of communicating processes.
Collaborating actors are grouped within task-specific networks (a.k.a. virtual machines) to scope their interactions. Conversations between actors are multi-party (using a publish/subscribe medium), and actors can easily participate in many such conversations at once.
Syndicate makes presence notifications an integral part of pub/sub through its shared dataspaces, akin to tuplespaces. Each shared dataspace doubles as the pub/sub subscription table for its network. Actors react to state change notifications reporting changes in a dataspace, including new subscriptions created by peers and removal of subscriptions when a peer exits or crashes. State change notifications serve to communicate changes in demand for and supply of services, both within a single network and across nested layers of networks-within-networks. Programs can give up responsibility for maintaining shared state and for scoping group communications, letting their containing network take on those burdens.
Contents
This repository contains
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a Racket implementation of Syndicate (plus auxiliary modules) in
racket/syndicate/ -
an ECMAScript 5 implementation of Syndicate in
js/ -
larger example programs:
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examples/platformer, a 2D Platform game written in Syndicate for Racket. -
examples/netstack, a TCP/IP stack written in Syndicate for Racket. It reads and writes raw Ethernet packets from the kernel using Linux- and OSX-specific APIs.
-
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a sketch of a Haskell implementation of the core routing structures of Syndicate in
hs/
Copyright and License
Copyright © Tony Garnock-Jones 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.