Pike-devel March 2011

pike-devel@lists.lysator.liu.se

7 participants
14 discussions

managing comport settings in linux
by Henrik Grubbstr�m (Lysator) ＠ Pike (-) developers forum 10 Apr '26

10 Apr '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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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)?

5 4

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

4 4

Sql.pgsql behavior in case of errors
by aldem-pikedev＠aldem.net 21 Aug '14

21 Aug '14

Hi everyone, I am preparing to use Postgres in my app, found the following strange behavior: ---snip--- Sql.Sql db = Sql.Sql("pgsql://localhost", "test", "test", "test"); db->query("BEGIN"); db->query("INSERT INTO requests (SvTrId) VALUES ('lala')"); catch(db->query("INSERT INTO requests (SvTrId) VALUES ('lala')")); db->query("INSERT INTO requests (SvTrId) VALUES ('juju')"); db->query("ROLLBACK"); ---snip--- Database is opened, row with 'lala' is inserted, second query (obviously) fails as SvTrId is the primary key, but row with 'juju' is inserted *and* appears in the database - i.e. the transaction is *committed*! Studying source code show, that once error is encounter, session is reset, i.e. running transaction is rolled back, everything is closed, temporary tables are deleted and session variables are reset as well, and after that, the next statement(s) will be committed immediately, as there is no active transaction. In my opinion, this is not exactly correct behavior when statement fails, as session still may be needed (especially temporary tables, open cursors etc). Im some cases, this is perfectly normal when SQL statement fails, especially in SERIALIZED transaction isolation level, and it would be more practical to leave the decision as of what to do to the application. Yes, this is true that it is impossible to continue executing statements in failed transaction, but temporary tables etc. may still be needed. Also, silent reconnection is not a good idea too - when there are many transactional statements are executed - it would be nice to have an option to modify this behavior. Best regards, /Alexander

5 6

32 bit abi crashes on darwin
by H. William Welliver III 02 Apr '11

02 Apr '11

I just tried to compile 7.8.352 on a new core i7 box running OSX 10.6 using 32-bit abi and the build fails because the pike generated crashes somewhere in the machine code generation. I compiled using the following command line: make CONFIGUREARGS="--with-abi=32" The backtrace looks like this: Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_PROTECTION_FAILURE at address: 0x0000004f 0x000c0227 in ia32_flush_instruction_cache (start=<value temporarily unavailable, due to optimizations>, len=55) at ia32.c:1047 1047 __asm__ __volatile__(".byte 0x0f\n" (gdb) bt #0 0x000c0227 in ia32_flush_instruction_cache (start=<value temporarily unavailable, due to optimizations>, len=55) at ia32.c:1047 #1 0x0012e61e in eval_low (n=0x838d78, print_error=1) at /Users/hww3/Downloads/Pike-v7.8.352/src/las.c:5241 #2 0x0000b48b in yyparse () at language.yacc:660 #3 0x000ee199 in f_compilation_compile (args=0) at /Users/hww3/Downloads/Pike-v7.8.352/src/program.c:8213 #4 0x0001697b in low_mega_apply (type=APPLY_LOW, args=0, arg1=0x831fb4, arg2=0x1) at apply_low.h:226 #5 0x000181cc in mega_apply (type=APPLY_LOW, args=0, arg1=0x831fb4, arg2=0x1) at /Users/hww3/Downloads/Pike-v7.8.352/src/interpret.c:2211 #6 0x000185b0 in apply (o=0x831fb4, fun=0x1ecfbf "compile", args=0) at /Users/hww3/Downloads/Pike-v7.8.352/src/interpret.c:2604 #7 0x000d939f in f_compilation_env_compile (args=1) at /Users/hww3/Downloads/Pike-v7.8.352/src/program.c:7828 #8 0x0001697b in low_mega_apply (type=APPLY_LOW, args=1, arg1=0x831fdc, arg2=0x1) at apply_low.h:226 #9 0x000181cc in mega_apply (type=APPLY_LOW, args=1, arg1=0x831fdc, arg2=0x1) at /Users/hww3/Downloads/Pike-v7.8.352/src/interpret.c:2211 #10 0x00145d5c in f_compile (args=1) at /Users/hww3/Downloads/Pike-v7.8.352/src/builtin_functions.c:4229 #11 0x000c83ae in get_master () at /Users/hww3/Downloads/Pike-v7.8.352/src/object.c:643 #12 0x000c85bb in debug_master () at /Users/hww3/Downloads/Pike-v7.8.352/src/object.c:689 #13 0x000b61cc in load_pike_master () at /Users/hww3/Downloads/Pike-v7.8.352/src/pike_embed.c:468 #14 0x000022e8 in main (argc=1, argv=0xbffff804) at /Users/hww3/Downloads/Pike-v7.8.352/src/main.c:629 Of course, things work fine using 64 bit ABIs, but I have a need to use some libraries that are 32 bit only, which of course makes everything more complicated. I'm going to assume that it's not something I've done wrong, but please do let me know if my assumption is incorrect :) Thanks in advance, Bill

5 6

float hashing
by Arne Goedeke 31 Mar '11

31 Mar '11

There is a problem with the hash function currently used for floats. It multiplies by some number and casts the result to an UINT32. This will lead to many floats having the same hash value 0. Especially bad case: hash_values(random(Float.MAX)) Also from those results I would say that random is broken for floats. It will always produce values lying within a few orders of magnitues in the above case. There is many options for good hash functions for floats/ints. Any preferences? arne

4 22

Cannot delete branches
by Martin Stjernholm, Roxen IS ＠ Pike developers forum 20 Mar '11

20 Mar '11

I just created a branch with a "mast/" prefix in the pike git, and then I changed my mind and tried to remove it again, but that's denied by the pre-receive hook: > git push origin :mast/precompiler-trouble remote: fatal: Not a valid commit name 0000000000000000000000000000000000000000 remote: git exited with code 128 To git-pike@pike-git.lysator.liu.se:pike.git ! [remote rejected] mast/precompiler-trouble (pre-receive hook declined) error: failed to push some refs to 'git-pike@pike-git.lysator.liu.se:pike.git' This is not intended, right?

2 4

Pike 7.6 in Debian
by Magnus Holmgren, Millnet/Lysator/Debian/Mensa ＠ Pike developers forum 20 Mar '11

20 Mar '11

With Squeeze released I think it's time to drop pike7.6 and focus on newer versions. Anyone against?

3 2

RCSID
by Martin Stjernholm, Roxen IS ＠ Pike developers forum 13 Mar '11

13 Mar '11

Regarding 2e50900, I don't see why rcsid would be significantly less useful in git than in rcs or cvs. Granted, one would have to run a few git commands on the hashes to make sense of them. Not that I object to RCSID's getting removed; I've never had any use for them in any case.

2 3

String.Buffer
by Martin Nilsson (Opera Mini - AFK!) ＠ Pike (-) developers forum 13 Mar '11

13 Mar '11

Can we get a sprintf method into the String.Buffer object? It doesn't look that difficult as low_pike_sprintf takes a string builder struct. I got lost in the type system and dynamic loading in my try though...

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Pike-devel March 2011