problem to write a THREAD enabled python extension
Andreas Otto
aotto1968 at users.sourceforge.net
Tue Aug 25 07:24:37 EDT 2009
Stefan Behnel wrote:
>
> You forgot to create a thread state for the new thread. See the
> PyThreadState_New() function.
>
this does not really solve the problem even if the original error does no
happen anymore ...
but a bucket of other error happen >>> sometimes <<< and this mean
that time and (I call it so) internal state stuff has influence on the
problem and create errors like:
1. http://mail.python.org/pipermail/python-list/2004-January/242740.html
2. various PyThreadState_Get -> PyThreadState_Get: no current thread
3. sometimes ThreadState has NULL sometimes not and NULL create an
CORE for "tstate" pointer access operations
4. ... a lot of other problems too
all problems together I come to the conclusion:
1. I spend ~ 1week for a job done in C# or java in a day - and have no
usable solution
2. python need a couple of 100+ C API function for the same job
java need 10+
3. the design on the C-API is amateurish -> significant parts are
implemented as GLOBAL variables
4. the thread support is not more than a joke -> go to 3
5. after pay a lot of effort to get something working the final solution
is significant slower than C# or JAVA
6. you can not truss any-thing in python because you never know
if under some circumstance you get a CORE
the resulting PYTHON code is usable but not significant more readable
as JAVA, C* or even C++ code
mfg
aotto1968
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