alright i made the change and here is the code:
cdef double count(int n) nogil:
cdef int i, j, k
cdef double out
for i from 0 <= i < n:
for j from 0 <= j < n:
out = 0
for k from 0 <= k < n:
out += k
return out
def myinterface():
cdef int n = 10000000
cdef double out
out = count(n)
return out
this compiles but when i test with this python script I hang on the function
call:
import threading
from giltest import myinterface
class NoGil(threading.Thread):
def __init__(self):
super(NoGil, self).__init__()
def run(self):
a = myinterface()
print 'non gil', a
class Gil():
def run(self):
print 'gil thread'
if __name__=='__main__':
a = NoGil()
b = Gil()
a.start()
b.run()
raw_input()
i presume this is because myinterface() doesn't release the gil, and thus
waits for count() to return.
How do I work this so that I can run a c-function outside the gil and thus
make use of the multi-cores on my machine?
Thanks!
Chris
On Wed, May 13, 2009 at 11:58 AM, Chris Colbert <[email protected]> wrote:
> thanks
>
>
> On Wed, May 13, 2009 at 11:48 AM, Dag Sverre Seljebotn <
> [email protected]> wrote:
>
>> Chris Colbert wrote:
>> > I'm trying to test writing extensions that release the gil. This simple
>> > example is failing cython compilation with errors stating that the
>> > count() function requires the gil.
>> >
>> > Can anyone point me in the right direction?
>>
>> http://trac.cython.org/cython_trac/ticket/205
>>
>> A fix is scheduled at "not before the 0.12 release".
>>
>> Until then, you must use the
>>
>> for i from 0 <= i < n:
>> ...
>>
>> syntax.
>>
>> --
>> Dag Sverre
>> _______________________________________________
>> Cython-dev mailing list
>> [email protected]
>> http://codespeak.net/mailman/listinfo/cython-dev
>>
>
>
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