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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Brad Fitzpatrick‏Verified account @bradfitz 29 Jun 2017
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      Replying to @willie @bagder

      Oh yeah. I've been scarred by that from a past life. I feel your pain.

      1 reply 0 retweets 1 like
    2. Jimmy Zelinskie‏ @jimmyzelinskie 29 Jun 2017
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      Replying to @bradfitz @willie @bagder

      Can you do this with zero copy?

      2 replies 0 retweets 0 likes
    3. Willie Abrams‏ @willie 29 Jun 2017
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      Replying to @jimmyzelinskie @bradfitz @bagder

      Haven’t gotten that far yet on performance tuning. Just some basic stuff, getting it working. It’s my first mix of C & Go.

      1 reply 0 retweets 0 likes
    4. Hector Martin‏ @marcan42 30 Jun 2017
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      Replying to @willie @jimmyzelinskie and

      Good luck. In my experience C interop is one of Go's weakest points (and the main reason why I don't use it). Dragons lurk under the hood.

      1 reply 0 retweets 0 likes
    5. Willie Abrams‏ @willie 30 Jun 2017
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      Replying to @marcan42 @jimmyzelinskie and

      Anything in particular I need to be aware of? My tests have been intentionally simple so far.

      1 reply 0 retweets 0 likes
    6. Hector Martin‏ @marcan42 30 Jun 2017
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      Replying to @willie @jimmyzelinskie and

      Be very careful with memory management. Last I used it, the requirements/guarantees wrt Go-owned memory were unclear/poorly documented.

      2 replies 0 retweets 1 like
    7. Brad Fitzpatrick‏Verified account @bradfitz 30 Jun 2017
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      Replying to @marcan42 @willie and

      The requirements were defined and documented a few releases back. There's also a runtime check for the rules. No as bad anymore.

      2 replies 0 retweets 0 likes
    8. Hector Martin‏ @marcan42 30 Jun 2017
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      Replying to @bradfitz @willie and

      Is there some kind of pinning mechanism for Go memory to avoid having to make copies?

      1 reply 0 retweets 0 likes
    9. Brad Fitzpatrick‏Verified account @bradfitz 30 Jun 2017
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      Replying to @marcan42 @willie and

      You can just share things directly, no copies required, in most cases. See https://golang.org/cmd/cgo/#hdr-Passing_pointers …

      2 replies 0 retweets 0 likes
    10. Hector Martin‏ @marcan42 30 Jun 2017
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      Replying to @bradfitz @willie and

      I remember reading that at some point. It's still *very* restrictive. Works fine for flat buffers but data structures are hell.

      2 replies 0 retweets 0 likes
      Hector Martin‏ @marcan42 30 Jun 2017
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      Replying to @marcan42 @bradfitz and

      E.g. the only way to follow those rules and use complex context-based callback APIs is to indirect through a map or similar.

      10:23 AM - 30 Jun 2017
      1 reply 0 retweets 0 likes
        1. Willie Abrams‏ @willie 30 Jun 2017
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          Replying to @marcan42 @bradfitz and

          I programmed things for the old QuickTime component manager — I can handle refcons and all those hoops just fine if I need it. :-)

          0 replies 0 retweets 0 likes
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