Pike-devel June 2020

pike-devel@lists.lysator.liu.se

6 participants
15 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 28 Feb '26

28 Feb '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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Pike Meet-up 2018-Q1
by Henrik Grubbstr�m (Lysator) ＠ Pike (-) developers forum 20 Oct '21

20 Oct '21

Hi. At Pike Conference 2017 it was decided that we ought to hold a more informal meeting in Linköping ~ once every quarter. As the three month mark from the conference is coming up soon, it seems time to announce the first such meeting for 2018: Pike Meet-up 2018-Q1 Date: 2018-02-03 (Sat) Time: 10:00 - afternoon/evening Place: Roxen IS AB S:t Larsgatan 22A Linköping Welcome! /grubba

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Segmentation fault cause
by Stephen R. van den Berg 28 Aug '20

28 Aug '20

Running without these commits, it runs forever. Running with these commits results in segmentation faults every few minutes to hours (this is in heavy threaded/lock code: pgsql driver). I cannot offer a stacktrace yet. commit 4781e5e4fe034cc8b2acef468131d5dbc51ca21f Author: Henrik Grubbström (Grubba) <grubba(a)grubba.org> Date: Sun Jun 28 16:33:02 2020 +0200 Threads.Mutex: Added {try_,}shared_lock(). src/threads.c | 256 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 246 insertions(+), 10 deletions(-) commit 35fa44331e70809a86a97a91bf80e27a38a6f35b Author: Henrik Grubbström (Grubba) <grubba(a)grubba.org> Date: Sat Jun 27 13:58:46 2020 +0200 Thread.Mutex: Keep track of pending locks. Mutex locks are now taken in the same order as the calls to lock(). This prevents potential starvation. src/threads.c | 181 +++++++++++++++++++++++++++++++++++++++++++++--------------- 1 file changed, 137 insertions(+), 44 deletions(-) commit d461910bac03f0fddf714dff8794e73988d07ea6 Author: Henrik Grubbström (Grubba) <grubba(a)grubba.org> Date: Fri Jun 26 12:34:34 2020 +0200 Thread.Mutex: The key pointer is now to the storage (and not the object). src/threads.c | 69 ++++++++++++++++++++++++++++++++++--------------------------- 1 file changed, 39 insertions(+), 30 deletions(-) commit 37406b33d5670026537d4a9aca4776a88a94380b Author: Henrik Grubbström (Grubba) <grubba(a)grubba.org> Date: Thu Jun 25 15:37:42 2020 +0200 Build: Fixed some warnings. src/post_modules/GSSAPI/gssapi.cmod | 1 + src/post_modules/Nettle/hogweed.cmod | 1 + src/post_modules/SDL/SDL.cmod | 2 +- src/post_modules/ZXID/zxid.cmod | 2 +- 4 files changed, 4 insertions(+), 2 deletions(-) commit ea9a8260156eca36ceb1f555fd1c04c9f1c71685 Author: Henrik Grubbström (Grubba) <grubba(a)grubba.org> Date: Wed Jun 24 18:16:52 2020 +0200 Thread.MutexKey: Some preparations for having different kinds of keys. src/threads.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) -- Stephen.

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Crypto.Password and Blowfish
by Stephen R. van den Berg 19 Jul '20

19 Jul '20

Has anyone attempted to add support for Blowfish encryption to Crypto.Password? I have some $2y$... prefixed passwords (interfacing with the PHP password_verify()) which I need to verify. -- Stephen.

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Operator assignment and strict_types
by Marc Simpson 07 Jul '20

07 Jul '20

Hi folks, It looks like operator assignment (op=), increment and decrement statements aren't subjected to the same typechecks as their more explicit equivalents. For example, neither the post-increment nor += statements below warn with strict_types enabled, even though they assign values outside of foo's restricted int domain: int(3..3) foo = 3; foo++; // no warning foo += 1; // no warning foo = foo + 1; // warning from strict_types Similarly, operator assignment on aggregates fails to elicit a warning: array(int) a = ({}); multiset(int) b = (<>); mapping(int:int) c = ([]); // no warnings a += ({ "hey" }); b += (< "hey" >); c += ([ "hey": "there" ]); // warnings from strict_types a = a + ({ "hey" }); b = b + (< "hey" >); c = c + ([ "hey": "there" ]); I'm guessing this is because the checks provided by the F_ASSIGN/F_ASSIGN_SELF case (las.c) only apply to direct assignment; op= and friends are presumably not instrumented for strict_types in the same manner. Have there been any discussions around addressing this inconsistency? Thanks, Marc

3 3

an automap bug
by Mateusz Krawczuk 06 Jul '20

06 Jul '20

Reproduces both on pike 8 from apt repository and pike compiled on master: $ ./pike -v Pike v8.1 release 13 Copyright © 1994-2018 Linköping University Pike comes with ABSOLUTELY NO WARRANTY; This is free software and you are welcome to redistribute it under certain conditions; read the files COPYING and COPYRIGHT in the Pike distribution for more details. $ $ cat automap1.pike int main() { write( "%O\n", combine_path("foo", ({ "abc", "cde" })[*] ) ); } $ $ cat automap2.pike int main() { string s = "foo"; write("%O\n", combine_path(s, ({ "abc", "cde" })[*] ) ); } $ $ ./pike automap1.pike ({ /* 2 elements */ "foo/abc", "foo/cde" }) $ $ ./pike automap2.pike automap2.pike:4:[*] not supported here. Pike: Failed to compile script. $ $ pike -v Pike v8.0 release 498 Copyright © 1994-2017 Linköping University Pike comes with ABSOLUTELY NO WARRANTY; This is free software and you are welcome to redistribute it under certain conditions; read the files COPYING and COPYRIGHT in the Pike distribution for more details. $ pike automap1.pike ({ /* 2 elements */ "foo/abc", "foo/cde" }) $ $ pike automap2.pike automap2.pike:4:[*] not supported here.

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Recursive typedefs and add_constant
by Chris Angelico 28 Jun '20

28 Jun '20

I've run into a weirdness involving a recursive typedef and adding a constant. Example: typedef string|int|array(foo) foo; If compiled on its own, this creates a recursive typedef that can handle arbitrarily-nested arrays of strings and ints. Contrast: typedef multiset(string|int) strint; add_constant("strint", strint); typedef string|int|array(strint) foo; This will reference the added constant, and will allow strings, integers, and multisets of strings/ints, but not recursively. What if both names are the same? constant code = #" typedef string|int|array(foo) foo; foo x = 1.0; "; typedef multiset(string|int) strint; void compile_error(string filename, int line, string msg) {write("%s\n", msg);} int main() { write("Without constant:\n"); catch {compile_string(code, "-", this);}; add_constant("foo", strint); write("\nWith constant:\n"); catch {compile_string(code, "-", this);}; } Is the array of foo supposed to be a recursive reference, or a reference to the constant? And is there a way to force one interpretation or the other? A related problem (or a consequence of this) is that repeatedly recompiling a provider of constants can cause strangenesses, up to and including quadratically-increasing compilation time. Consider this cut-down version of part of one of my apps: constant code = #" #ifdef FAST typedef string|mapping(string:string|_echoable_message)|array(_echoable_message) _echoable_message; typedef _echoable_message echoable_message; #else typedef string|mapping(string:string|echoable_message)|array(echoable_message) echoable_message; #endif typedef echoable_message|function(object,object,string:echoable_message) command_handler; bool assess_command(command_handler f) { object|mapping flags = functionp(f) ? function_object(f) : mappingp(f) ? f : ([]); return flags->ok; } protected void create(string n) { #ifndef FAST2 add_constant(\"echoable_message\", echoable_message); #endif add_constant(\"assess_command\", assess_command); } "; int main() { add_constant("commands", ([])); System.Timer tm = System.Timer(); while (1) { compile_string(code)(); write("Compiled in %.2fs\n", tm->get()); } } Running this with -DFAST uses a different name temporarily, dodging the problem. Using -DFAST2 doesn't add the typedef as a constant, also dodging the problem. But otherwise, it quickly starts taking notable time to run each compilation - each iteration about 3-4 times as long as the previous. The question is: Should echoable_message be using the added constant, or should it be defined recursively? I actually don't know what is correct behaviour here. ChrisA

1 0

`-> and the context argument
by Stephen R. van den Berg 20 Jun '20

20 Jun '20

The docs say this: mixed `->(string index, object|void context, int|void access) Parameter context Context in the current object to start the search from. If UNDEFINED or left out, this_program::this is to be be used (ie start at the current context and ignore any overloaded symbols). Can someone illustrate this with an example which shows how context can differ and how it could be used? -- Stephen.

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Pike-devel June 2020