Pike-devel September 2016

pike-devel@lists.lysator.liu.se

7 participants
17 discussions

Re: Playing music using pike and SDL.
by Martin Nilsson (lvl 60) ＠ Pike (-) developers forum 13 Mar '26

13 Mar '26

Were you not able to get any C code to play through SDL either? Does your SDL library have a mixer compiled in it (I think it is optional)?

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managing comport settings in linux
by Henrik Grubbstr�m (Lysator) ＠ Pike (-) developers forum 13 Mar '26

13 Mar '26

Not a good idea; the design philosophy of Pike is that Pike-level code should never be able to cause memory corruption at C-level. With ioctls there's no way to know what data a specific ioctl wants without reading the documentation for that specific ioctl for that specific OS. ioctls and fcntls are a way for device handlers to hook in APIs that aren't standard across all filedescriptors. / Henrik Grubbström (Lysator) Previous text: >2004-08-17 13:32: >Subject: managing comport settings in linux >-------------------------------------------------------------------- >What would be nice, is a way to define ioctl methods in >Pike. Perhaps something like > >object i = Stdio.IOCTL(4242 /* request_id */ ); >i->add_int_parameter(); >i->add_string_parameter(); >i->set_return_type(STRING); > >string ret = i(fd, 1, "somestring"); > > >That ought to be possible, or..? > > / Marcus Agehall (PacketFront) >

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full MySQL 4.x support. or pike roadmap
by thomas.gusenleitner＠com-bet.com ＠ Pike developers forum 01 Mar '26

01 Mar '26

HI to all! mysql 4.x support works only with a mysql CFLAGS=-DUSE_OLD_FUNCTIONS is this correct ? are there plans to make a full 4.x support ? bye, thomas

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Optimised map
by Martin Karlgren 09 Jan '17

09 Jan '17

Hi, Having realised the benefits of functional programming, I’ve been quite annoyed by the rumour of how expensive function calls are in Pike. I decided to look into f_map and could see how much seemingly unnecessary work it does when it calls apply_svalue once for each entry in the array – it should be possible to reuse the pike_frame if it’s about to be thrown away after the function call (if it has other refs on the other hand, it can’t be reused – it’s probably used as a scope in some other frame). I’ve pushed my optimised variant in marty/optimised_map – it seems to work quite well and provides a major speedup. In fact, it’s a bit faster than the corresponding foreach variant. I haven’t verified correctness in various corner cases, and some input on whether it’s correct to do the things init_frame_reuse_context does only once before multiple function calls would be nice too. The *_reuse_context stuff in interpret.c should be applicable wherever the same svalue is applied repeatedly with the same number of arguments (I haven’t looked for it outside of f_map really). What do you all think? Good idea or did I overlook something? Without optimisation: map: 1.660797 array index: 1.335115 array append: 1.17917 With optimisation: map: 0.877659 array index: 1.351158 array append: 1.189812 Test program: int main() { array base = allocate(10000000, 1); float gmap = gauge { array res = map (base, lambda(int i) { return i + 2; }); }; float garrayindex = gauge { array res = allocate(sizeof(base)); foreach (base; int idx; int i) { res[i] = i + 2; } }; float garrayappend = gauge { array res = ({}); foreach (base, int i) { res += ({ i + 2 }); } }; werror ("map: %O\n", gmap); werror ("array index: %O\n", garrayindex); werror ("array append: %O\n", garrayappend); } /Marty

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Clean-room Engine.IO implementation committed to git 8.0/8.1
by Stephen R. van den Berg 23 Nov '16

23 Nov '16

Please review, any comments are welcome. The docs still need improvement, working on that. Currently tackling Socket.IO. -- Stephen.

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WebSocket, skips parse_variables at times, why?
by Stephen R. van den Berg 22 Nov '16

22 Nov '16

I'm currently implementing the Engine.IO (and possibly Socket.IO) protocol in Pike (bidirectional realtime communication with JavaScript clients). While doing so I noticed (to my dismay) that in WebSocket, I find the following code snippet: protected int parse_variables() { if (has_index(request_headers, "sec-websocket-key")) return 0; return ::parse_variables(); } I.e. parse_variables() is skipped on real websocket connections. What would be the reason why this is being skipped? I need to parse the variables on the URL of the soon-to-be-upgraded websocket connection; so it would be more convenient if it was handled automatically. -- Stephen.

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Added permessage-deflate support to WebSocket
by Stephen R. van den Berg 22 Nov '16

22 Nov '16

Added it to both 8.0 and 8.1. It's in use in my Socket.IO implementation, and so far it passes all tests. Since testing it involves using a webbrowser as counterpart, my tests are sadly not comprehensive. Arne, could you check the code and see if it meets your criteria on the proposed visible interfaces? There is a little bit of trickery involved in the rsv bits. In order to know if to decompress, we need to know the RSV1 bit on the *first* frame part of the larger frameset. -- Stephen.

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nettle in fedora/centos does not include the secp192 and 224 curves
by Martin Bähr 22 Nov '16

22 Nov '16

hi, i just discovered that nettle in fedora/centos does not include the secp192 and 224 curves. this is not discovered during build, but instead just leads to a runtime error. (the installation succeeds despite the error) to make building pike work properly, the absence of these needs to be tested, so the code referencing them can be skipped. i verified that, removing the references to those curves makes pike run without error, though i am not sure if this should be a compile option or if automatic detection is better. greetings, martin.

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Performance/memory usage difference?
by Stephen R. van den Berg 22 Nov '16

22 Nov '16

Given two solutions: 1.==================================================== class A { final int b; final C e; class C { final int D() { return b; } }; void create() { e = C(); }; }; or 2.: ================================================ class C { final array b; final array D() { return b; }; void create(array _b) { b = _b; }; }; class A { final array b; final C e; void create() { e = C(b); }; }; ==================================================== Assuming that there are (a lot) more other members and methods in both classes (which are accessed within the class, not cross-class), and further assuming that the A class is being instantiated a *lot*: What would the runtime impact of these two approaches considering CPU time and memory used? I would guess that solution 1 would be slightly more efficient, both memory and CPU-wise. Or am I overlooking something here where due to the nested stack frames of solution 1, the actual CPU or memory usage is higher than expected? -- Stephen.

4 3

Pike 8.0.294 beta
by Peter Bortas 22 Nov '16

22 Nov '16

Pike 8.0.294 beta/release candidate: https://pike.lysator.liu.se/pub/pike/beta/8.0.294/Pike-v8.0.294.tar.gz Other builds: https://pike.lysator.liu.se/pub/pike/beta/8.0.294/Pike-v8.0.294-Darwin-15.4… https://pike.lysator.liu.se/pub/pike/beta/8.0.294/Pike-v8.0.294-win32-oldli… -- Peter Bortas, NSC

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Pike-devel September 2016