package picos
Install
Dune Dependency
Authors
Maintainers
Sources
sha256=862d61383e2df93a876bedcffb1fd1ddc0f96c50b0e9c07943a2aee1f0e182be
sha512=87805379017ef4a7f2c11b954625a3757a0f1431bb9ba59132202de278b3e41adbe0cdc20e3ab23b7c9a8c5a15faeb7ec79348e7d80f2b14274b00df0893b8c0
CHANGES.md.html
0.5.0
Major additions, changes, bug fixes, improvements, and restructuring (@polytypic, @c-cube)
Additions:
Minimalistic Cohttp implementation
Implicitly propagated
Flock
of fibers for structured concurrencyOption to terminate
Bundle
andFlock
on returnEvent
abstractionSynchronization and communication primitives:
Incremental variable or
Ivar
Countdown
Latch
Semaphore
Stream
of events
Multi-producer, multi-consumer lock-free queue optimized for schedulers
Multithreaded (work-stealing) FIFO scheduler
Support
quota
for FIFO based schedulersTransactional interface for atomically completing multiple
Computation
s
Changes:
Redesigned resource management based on
('r -> 'a) -> 'a
functionsRedesigned
spawn
interface allowingFLS
entries to be populated before spawnIntroduced concept of fatal errors, which must terminate the scheduler or the whole program
Simplified
FLS
interface
Improvements:
Signficantly reduced per fiber memory usage of various sample schedulers
Picos has now been split into multiple packages and libraries:
pkg:
picos
lib:
picos
lib:
picos.domain
lib:
picos.thread
pkg:
picos_aux
lib:
picos_aux.htbl
lib:
picos_aux.mpmcq
lib:
picos_aux.mpscq
lib:
picos_aux.rc
pkg:
picos_lwt
lib:
picos_lwt
lib:
picos_lwt.unix
pkg:
picos_meta
(integration tests)pkg:
picos_mux
lib:
picos_mux.fifo
lib:
picos_mux.multififo
lib:
picos_mux.random
lib:
picos_mux.thread
pkg:
picos_std
lib:
picos_std.event
lib:
picos_std.finally
lib:
picos_std.structured
lib:
picos_std.sync
pkg:
picos_io
lib:
picos_io
lib:
picos_io.fd
lib:
picos_io.select
pkg:
picos_io_cohttp
lib:
picos_io_cohttp
0.4.0
Renamed
Picos_mpsc_queue
toPicos_mpscq
. (@polytypic)Core API changes:
Added
Computation.returned
. (@polytypic)
Lwt
interop improvements:Fixed
Picos_lwt
handling ofCancel_after
to not raise in case of cancelation. (@polytypic)Redesigned
Picos_lwt
to take aSystem
module, which must implement a semi thread-safe trigger mechanism to allow unblockingLwt
promises on the main thread. (@polytypic)Added
Picos_lwt_unix
interface toLwt
, which includes an internalSystem
module implemented usingLwt_unix
. (@polytypic)Dropped thunking from
Picos_lwt.await
. (@polytypic)
Added a randomized multicore scheduler
Picos_randos
for testing. (@polytypic)Changed
Picos_select.check_configured
to always (re)configure signal handling on the current thread. (@polytypic)Picos_structured
:Added a minimalistic
Promise
abstraction. (@polytypic)Changed to more consistently not treat
Terminate
as an error. (@polytypic)
Changed schedulers to take
~forbid
as an optional argument. (@polytypic)Various minor additions, fixes, and documentation improvements. (@polytypic)
0.3.0
Core API changes:
Added
Fiber.set_computation
, which represents a semantic changeRenamed
Fiber.computation
toFiber.get_computation
Added
Computation.attach_canceler
Added
Fiber.sleep
Added
Fiber.create_packed
Removed
Fiber.try_attach
Removed
Fiber.detach
Most of the above changes were motivated by work on and requirements of the added structured concurrency library (@polytypic)
Added a basic user level structured concurrent programming library
Picos_structured
(@polytypic)Added a functorized
Picos_lwt
providing direct style effects based interface to programming with Lwt (@polytypic)Added missing
Picos_stdio.Unix.select
(@polytypic)
0.2.0
Documentation fixes and restructuring (@polytypic)
Scheduler friendly
waitpid
,wait
, andsystem
inPicos_stdio.Unix
for platforms other than Windows (@polytypic)Added
Picos_select.configure
to allow, and sometimes require, configuringPicos_select
for co-operation with libraries that also deal with signals (@polytypic)Moved
Picos_tls
intoPicos_thread.TLS
(@polytypic)Enhanced
sleep
andsleepf
inPicos_stdio.Unix
to block in a scheduler friendly manner (@polytypic)
0.1.0
First experimental release of Picos.
Core:
picos
— A framework for interoperable effects based concurrency.
Sample schedulers:
picos.fifos
— Basic single-threaded effects based Picos compatible scheduler for OCaml 5.picos.threaded
— BasicThread
based Picos compatible scheduler for OCaml 4.
Scheduler agnostic libraries:
picos.sync
— Basic communication and synchronization primitives for Picos.picos.stdio
— Basic IO facilities based on OCaml standard libraries for Picos.picos.select
— BasicUnix.select
based IO event loop for Picos.
Auxiliary libraries:
picos.domain
— Minimalistic domain API available both on OCaml 5 and on OCaml 4.picos.exn_bt
— Wrapper for exceptions with backtraces.picos.fd
— Externally reference counted file descriptors.picos.htbl
— Lock-free hash table.picos.mpsc_queue
— Multi-producer, single-consumer queue.picos.rc
— External reference counting tables for disposable resources.picos.tls
— Thread-local storage.