Commit Graph

16 Commits

Author SHA1 Message Date
Jacek Sieka f5ff9e32ca
introduce asyncraises in transports/asyncsync (#470)
With these fixes, `transports`/`asyncsync` correctly propagate and document their raises information - generally, most transport functions (send etc) raise `TransportError` and `CancelledError` - `closeWait` is special in that it generally doesn't fail.

This PR introduces the syntax `Future[void].Raises([types])` to create the `InternalRaisesFuture` type with the correct encoding for the types - this allows it to be used in user code while retaining the possibility to change the internal representation down the line.

* introduce raising constraints on stream callbacks - these constraints now give a warning when called with a callback that can raise exceptions (raising callbacks would crash 
* fix fail and its tests, which wasn't always given a good generic match
* work around nim bugs related to macro expansion of generic types
* make sure transports raise only `TransportError`-derived exceptions (and `CancelledError`)
2023-11-15 09:38:48 +01:00
Eugene Kabanov 2e8551b0d9
Cancellation fixes and tests. (#445)
* Add callTick and stream cancellation tests.

* Fix stepsAsync() test.

* Cancellation changes.

* Update and add more cancellation tests.

* Fix Posix shutdown call to handle ENOTCONN error.

* With new changes to to cancellation its now possible.

* Refactor testsoon.nim to not produce artifacts after tests are finished.

* Debugging MacOS issue.

* Adjust flaky test times.

* Fix issue.

* Add test for issue #334 which was also addressed in this PR.
Avoid `break` in problematic test.

* Add noCancelWait() call which prohibits cancellation.
Fix closeWait() calls to use noCancelWait() predicate.
Adding sleep to flaky MacOS test.

* Remove all debugging echoes.

* Fix cancelAndWait() which now could perform multiple attempts to cancel target Future (mustCancel behavior).

* Fix issues revealed by switch to different cancelAndWait().

* Address review comments.

* Fix testutils compilation warning.

* Rename callTick() to internalCallTick().

* Add some documentation comments.

* Disable flaky ratelimit test.

* Rename noCancelWait() to noCancel().
Address review comments.
2023-09-15 19:38:39 +03:00
Jacek Sieka 1d6c309d77
clean up `Defect` (#404) 2023-06-05 22:21:50 +02:00
Eugene Kabanov 9ba418cd3b
Eliminate warnings on Windows. (#382) 2023-04-30 19:09:36 +02:00
Jacek Sieka 229de5f842
Compile-time configuration (#371)
This PR moves all compile-time configuration to a single module,
simplifying documentation and access to these features.

Upcomfing features may be enabled either individually, or through a new
`chronosPreviewV4` catch-all designed to allow code to be prepared for
increased strictness in future chronos releases.

`-d:chronosDebug` may be used to enable the existing debugging helpers
together.
2023-03-31 07:35:04 +02:00
Eugene Kabanov be2352027e
Fix nested waitFor (IndexError defect crash) bug. (#309)
Add IndexError crash test for Linux/MacOS.
Add Sentinel version of fix.
Add GetQueuedCompletionStatusEx() support for Windows, which allows to capture more then one event in single `poll()` call.
2022-09-16 22:34:18 +02:00
Eugene Kabanov d270dba8a3
Fix unused warnings, result, asyncCheck and 80 cpl (#185)
* Fix sources to follow 80 characters per line.
Fix unused compilation warnings.
Refactor (remove result) handles.nim.
Fix tests to use asyncSpawn instead of asyncCheck.

* Fix handles for Unix platforms.
2021-05-07 23:52:24 +03:00
Jacek Sieka 4abd7a5645
exception tracking (#166)
* exception tracking

This PR adds minimal exception tracking to chronos, moving the goalpost
one step further.

In particular, it becomes invalid to raise exceptions from `callSoon`
callbacks: this is critical for writing correct error handling because
there's no reasonable way that a user of chronos can possibly _reason_
about exceptions coming out of there: the event loop will be in an
indeterminite state when the loop is executing an _random_ callback.

As expected, there are several issues in the error handling of chronos:
in particular, it will end up in an inconsistent internal state whenever
the selector loop operations fail, because the internal state update
functions are not written in an exception-safe way. This PR turns this
into a Defect, which probably is not the optimal way of handling things
- expect more work to be done here.

Some API have no way of reporting back errors to callers - for example,
when something fails in the accept loop, there's not much it can do, and
no way to report it back to the user of the API - this has been fixed
with the new accept flow - the old one should be deprecated.

Finally, there is information loss in the API: in composite operations
like `poll` and `waitFor` there's no way to differentiate internal
errors from user-level errors originating from callbacks.

* store `CatchableError` in future
* annotate proc's with correct raises information
* `selectors2` to avoid non-CatchableError IOSelectorsException
* `$` should never raise
* remove unnecessary gcsafe annotations
* fix exceptions leaking out of timer waits
* fix some imports
* functions must signal raising the union of all exceptions across all
platforms to enable cross-platform code
* switch to unittest2
* add `selectors2` which supercedes the std library version and fixes
several exception handling issues in there

* fixes

* docs, platform-independent eh specifiers for some functions

* add feature flag for strict exception mode

also bump version to 3.0.0 - _most_ existing code should be compatible
with this version of exception handling but some things might need
fixing - callbacks, existing raises specifications etc.

* fix AsyncCheck for non-void T
2021-03-24 10:08:33 +01:00
Eugene Kabanov 319e2bfc09
Fix Nim's issue #13899 using #14723 and add tests. (#104) 2020-06-24 13:03:36 +03:00
Eugene Kabanov 3d745a4b0c
Fix Nim's issue #13889 https://github.com/nim-lang/Nim/issues/13889. (#90) 2020-04-06 15:49:09 +03:00
cheatfate 74700fdcab Fix bug cancellation handlers not called in wait() and withTimeout().
Fix double completion bug because of callback race.
Fix deprecation warnings.
Rename some internal procedures.
Bump version to 2.3.5.
2020-01-27 22:32:08 +02:00
cheatfate 29d9274e03
Fix some compilation warnings. 2019-10-24 16:01:57 +03:00
cheatfate 80ee289847
Fix rarely appearing Windows bug with close(transport).
Add tests for it.
Add fromProc for all Future[T] in transports.
Add testall to improve tests speed.
Bump version to 2.2.4.
2019-03-31 00:31:10 +02:00
Mamy Ratsimbazafy 9f15c6b752
Rebrand Asyncdispatch2 to Chronos [WIP] (#20)
* Update file headers, copyright date

* Rename files and hopefully fix nimble

* Forgot to change path in tests

* Update readme
2019-02-06 15:49:11 +01:00
cheatfate 44565b398e Improved test for #6. 2018-08-06 22:33:52 +03:00
cheatfate 9fb0eb8f36 Fix #6.
Add tests for #6.
2018-08-06 21:13:44 +03:00