Issue 13226: Expose RTLD_* constants in the posix module (original) (raw)
Created on 2011-10-19 22:05 by vstinner, last changed 2022-04-11 14:57 by admin. This issue is now closed.
Messages (9)
Author: STINNER Victor (vstinner) * 
Date: 2011-10-19 22:05
We have a sys.setdlopenflags() function, but required constants are not available on all platforms. The DLFCN is only available on Linux and sunos5 (is plat-sunos5 available for all Solaris and OpenIndiana versions?), but not on OpenBSD, FreBSD, Mac OS X, ... whereas these platforms have the sys.setdlopenflags() function.
My patch contains 7 constants:
- RTLD_LAZY
- RTLD_NOW
- RTLD_GLOBAL
- RTLD_LOCAL
- RTLD_NODELETE
- RTLD_NOLOAD
- RTLD_DEEPBIND (glibc >= 2.3)
The ctypes has two RTDL constants: RTLD_LOCAL and RTLD_GLOBAL. The 2 constants are always available, even if the platform doesn't support them! Extract of _ctypes.c:
/* If RTLD_LOCAL is not defined (Windows!), set it to zero. */ #ifndef RTLD_LOCAL #define RTLD_LOCAL 0 #endif
/* If RTLD_GLOBAL is not defined (cygwin), set it to the same value as RTLD_LOCAL. */ #ifndef RTLD_GLOBAL #define RTLD_GLOBAL RTLD_LOCAL #endif
Lib/plat-sunos5/DLFCN.py contains 25 constants, only 6 are available in my patch. I don't think that we should expose all constants.
Using Google Codesearch, I only found one user of RTLD constants (of the DLFCN module). It's PyKDE4 who calls:
sys.setdlopenflags(DLFCN.RTLD_NOW|DLFCN.RTLD_GLOBAL)
I guess that the 7 constants should be enough for everyone :-) We may add more later on demand. You can add your own constant to your program if you really need a special option on a specific platform.
Author: STINNER Victor (vstinner) *
Date: 2011-10-20 19:40
Updated patch: remove "either" in the documentation. Thanks neologix par the review.
Author: Charles-François Natali (neologix) *
Date: 2011-10-21 07:19
Note that I'm really +10 on this issue: such constants belong to individual modules rather than to the unmanageable Lib/plat-XXX/.
Author: Martin v. Löwis (loewis) *
Date: 2011-10-21 09:42
The patch looks fine to me. However, I don't think it meets Charles-François' requirement of moving the constants into an individual module. Rather than living in the unmanageable plat-XXX, they now live in the unmanageable posixmodule.c...
Author: Roundup Robot (python-dev) 
Date: 2011-10-25 11:34
New changeset c75427c0da06 by Victor Stinner in branch 'default': Issue #13226: Add RTLD_xxx constants to the os module. These constants can by http://hg.python.org/cpython/rev/c75427c0da06
Author: Arfrever Frehtes Taifersar Arahesis (Arfrever) *
Date: 2011-10-31 01:27
Python/sysmodule.c still contains references to DLFCN module.
Author: Roundup Robot (python-dev)
Date: 2011-10-31 10:50
New changeset 05e2bdc00c0c by Victor Stinner in branch 'default': Issue #13226: Update sys.setdlopenflags() docstring http://hg.python.org/cpython/rev/05e2bdc00c0c
Author: STINNER Victor (vstinner) *
Date: 2011-11-02 17:06
sys.getdlopenflags() doc and docstring still contain references to ctypes and DLFCN module.
Author: Roundup Robot (python-dev)
Date: 2013-06-21 15:00
New changeset 1da78c7d382b by Andrew Kuchling in branch 'default': #13226: update references from ctypes/DLFCN modules to os module http://hg.python.org/cpython/rev/1da78c7d382b
History
Date
User
Action
Args
2022-04-11 14:57:22
admin
set
github: 57435
2013-06-21 15:00:42
python-dev
set
messages: +
2011-11-02 17:06:12
vstinner
set
messages: +
2011-10-31 10:50:32
python-dev
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messages: +
2011-10-31 01:27:38
Arfrever
set
messages: +
2011-10-25 11:34:21
vstinner
set
status: open -> closed
resolution: fixed
2011-10-25 11:34:12
python-dev
set
nosy: + python-dev
messages: +
2011-10-21 09:42:21
loewis
set
nosy: + loewis
messages: +
2011-10-21 07:19:48
neologix
set
nosy: + neologix
messages: +
2011-10-20 19:40:45
vstinner
set
files: + posix_rtld-2.patch
messages: +
2011-10-19 23:20:06
Arfrever
set
nosy: + Arfrever
2011-10-19 22:14:17
jwilk
set
nosy: + jwilk
2011-10-19 22:05:43
vstinner
create