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2020-10-04 15:58:58 hackage simple-cabal 0.1.3 - Cabal file wrapper library https://hackage.haskell.org/package/simple-cabal-0.1.3 (JensPetersen)
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2020-10-04 16:12:22 <tomsmeding> is there a simple way to make command-line hoogle print the _package_ a particular module is from?
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2020-10-04 16:28:36 <c_wraith> can't ghc-pkg do that?
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2020-10-04 16:30:12 <c_wraith> yeah... it depends on having a package database, of course, but ghc-pkg find-module does exist
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2020-10-04 16:38:28 hackage irc-client 1.1.2.0 - An IRC client library. https://hackage.haskell.org/package/irc-client-1.1.2.0 (barrucadu)
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2020-10-04 16:43:12 <tomsmeding> c_wraith: oh that's exactly what I wanted!
2020-10-04 16:43:42 <tomsmeding> though I still wonder why hoogle can't seem to, especially since its web interface does list the source package :p
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2020-10-04 16:52:22 <[exa]> (also ghc-pkg doesn't really help you if you don't have the package installed, right?)
2020-10-04 16:52:50 <geekosaur> right
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2020-10-04 16:53:49 <ibloom> Let's say I have a buffer that I created in the IO monad using mallocBytes. I wrote a bunch of data to it in using poke. Is there a way I can freeze that buffer and access it, read only, from a pure function.
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2020-10-04 16:56:07 <rotaerk> ibloom, it would involve copying the contents of it into a pure value
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2020-10-04 16:56:45 <ibloom> Would I need to actually copy it or can I tell the compiler that it's frozen somehow?
2020-10-04 16:56:45 <[exa]> there are some ways for wrapping it in a "nice" interface, e.g. ByteString can be created from ForeignPtr
2020-10-04 16:56:58 <[exa]> (without copying ofc)
2020-10-04 16:57:00 <c_wraith> ibloom: mallocBytes and poke are part of the FFI, they're not really designed to support freezing. the array/vector packages give you an interface that does support freezing.
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2020-10-04 16:57:30 <[exa]> ibloom: why the raw malloc btw?
2020-10-04 16:57:51 <ibloom> The reason I'm doing this is because I have functions in OpenCL, Cuda and reference functions in Haskell.
2020-10-04 16:58:20 <ibloom> I'd like the haskell functions to just read from the same structures.
2020-10-04 16:58:23 <[exa]> probably better allocate an unboxed vector, convert it to Ptr and send that pointer
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2020-10-04 16:58:51 <[exa]> or are the structures allocated in the foreign code?
2020-10-04 17:00:02 <ibloom> The other reason I'm using malloc is because I homebrewed an append only buffer that can grow indefinitely. So maybe what I'm looking for is a package with a datatype that can be appended indefinitely and then frozen.
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2020-10-04 17:00:55 <rotaerk> the problem with freezing-without-copying is that it can still be mutated through the original pointer to it
2020-10-04 17:01:14 <rotaerk> unless it's an interface that forces the pointer to go out of scope just before the freeze
2020-10-04 17:01:21 <ski> (unless you ensure that you have a unique reference to the mutable block)
2020-10-04 17:01:45 <ski> ibloom : `realloc' ?
2020-10-04 17:02:23 <ibloom> I'm currently using realloc to grow my homebrew buffers.
2020-10-04 17:02:56 <ibloom> Basically I serialize haskell structures into buffers to send them to the GPU. I'm also maintaining haskell versions of the GPU code and I'd like that code to read the same buffers while being pretty clean.
2020-10-04 17:04:03 <ski> you could look at how <https://hackage.haskell.org/package/bytestring-0.11.0.0/docs/Data-ByteString-Internal.html> does things, e.g.
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2020-10-04 17:05:42 <ibloom> ski: I'll take a look at that thanks. I read about a newer variable size vector implementation a while back but I forgot the name.
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