4c0e291658
during/spawn used not to add linkage assertions to its initial-assertion set. In addition, if a spawned actor died in its initial boot procedure, its initial assertions would never be visible. These two problems interlocked to cause a space leak in during/spawn, where monitoring facets would never be cleaned up. This change does two things: - adds linkage assertions to the initial-assertion set in during/spawn - properly briefly signals initial-assertions even when a new actor immediately crashes. Together, these repair the space leak in during/spawn with a crashy child startup procedure. |
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| examples | ||
| historical | ||
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| imperative | ||
| js | ||
| racket | ||
| LICENSE | ||
| 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
-
a Racket implementation of Syndicate (plus auxiliary modules) in
racket/syndicate/ -
an ECMAScript 5 implementation of Syndicate in
js/ -
larger example programs:
-
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.
-
-
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/>.