[swift-corelibs-dev] NSTask and NSFileHandle implementation

[Chris Bailey]

Hi Daniel:

Support for DISPATCH_SOURCE_TYPE_READ should be there. If I remember 
correctly its just support for processes and VM memory pressure that isn't 
available.

Chris




From:   Daniel Eggert <danieleggert at me.com>
To:     Chris Bailey/UK/IBM at IBMGB
Cc:     Dan Stenmark <daniel.j.stenmark at gmail.com>, Swift core libraries 
<swift-corelibs-dev at swift.org>
Date:   20/04/2016 02:46
Subject:        Re: [swift-corelibs-dev] NSTask and NSFileHandle 
implementation



Wouldn't it still be a huge win to use dispatch for reading from / writing 
to a file descriptor?

/Daniel


On Apr 18, 2016, at 01:52, Chris Bailey via swift-corelibs-dev <
swift-corelibs-dev at swift.org> wrote:

Hi Dan: 

The Dispatch sources are mostly complete - unfortunately 
DISPATCH_SOURCE_TYPE_PROC isn't there and it unlikely to be there in a 
hurry. It would ideally need the underlying kqueue library to have 
EVFILT_PROC support, which it doesn't today. 

Chris




From:        Dan Stenmark via swift-corelibs-dev <
swift-corelibs-dev at swift.org> 
To:        Alexander Alemayhu <alexander at alemayhu.com> 
Cc:        Swift core libraries <swift-corelibs-dev at swift.org> 
Date:        16/04/2016 22:00 
Subject:        Re: [swift-corelibs-dev] NSTask and NSFileHandle 
implementation 
Sent by:        swift-corelibs-dev-bounces at swift.org 



While we’re on the subject, I’ve been out of the loop for a little while: 
how’s the Linux-side implementation of dispatch sources looking these 
days?  In particular, I’m interested in the status of 
DISPATCH_SOURCE_TYPE_READ and DISPATCH_SOURCE_TYPE_PROC. 

Right now, NSTask is using Good Ol’ CFRunLoops for it’s event handling, 
and I’d really like to move that over to GCD as soon as I can. 

Dan 


On Apr 16, 2016, at 1:55 PM, Dan Stenmark <daniel.j.stenmark at gmail.com> 
wrote: 

Hey Alexander, 

I supplied most of the initial implementation of NSTask, but was holding 
off on IO redirection until someone tackled NSFileHandle.  I can’t say if 
anyone else on this list is working on this right now, but if not and if 
you’re really interested in finishing NSFileHandle, I would (very 
happily!) take care of the relevant implementation in NSTask. 

Dan 

On Apr 16, 2016, at 1:50 AM, Alexander Alemayhu via swift-corelibs-dev <
swift-corelibs-dev at swift.org> wrote: 

Hei Everyone, 

Is anyone working on the NSTask and/or NSFileHandle implementation? 

I would like to fix the hangs issue in order to revert 
[3aa8434][0](disable 
NSTask tests for now since it can cause hangs., 2016-01-21), but want to 
avoid 
duplicating work. Fixing this should also resolve [SR-625][1]. 

Thanks. 

[0]: 
https://github.com/apple/swift-corelibs-foundation/commit/3aa8434df50d9513a0ac1646fb52516a092fa728 

[1]: https://bugs.swift.org/browse/SR-625 

-- 
Mit freundlichen Grüßen

Alexander Alemayhu 
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