From ndbecker2 at gmail.com  Sun Sep  1 23:36:10 2013
From: ndbecker2 at gmail.com (Neal Becker)
Date: Sun, 01 Sep 2013 17:36:10 -0400
Subject: [C++-sig] double free segfaults
References: <CAEKMBgiUk8cVFh4Pd4HzbWJXshz8-sv41mKpWVK3LfqZvnf63A@mail.gmail.com>
Message-ID: <l00c02$532$1@ger.gmane.org>

Ellery Newcomer wrote:

> Hello all.
> 
> I have been trying to wrap a third party C++ library with boost::python
> (first time using boost::python!), and on a very simple example I seem to
> be getting double free segfaults, so I am here soliciting advice. Does
> anything stand out?
> 
> In gdb, I can't seem to catch it calling any particular destructor more
> than once.
> 
> In pure c++, the class I am wrapping does not exhibit any such segfaults on
> simple usage, eg
> {
> CMOOSApp *app = new CMOOSApp();
> delete app;
> }
> 
> and other classes in the library do not exhibit such segfaults when I wrap
> them.
> 
> c++:
> 
> #include <boost/python.hpp>
> #include <MOOS/libMOOS/MOOSLib.h>
> 
> using namespace boost::python;
> 
> BOOST_PYTHON_MODULE(MOOSCore)
> {
>     class_<CMOOSApp, boost::noncopyable>("MOOSApp");
> }
> 
> python:
> 
> import MOOSCore
> 
> thing = MOOSCore.MOOSApp()
> 
> results:
> 
> $ python test.py
> *** glibc detected *** python: double free or corruption (out):
> 0x0000000000f92b50 ***
> ======= Backtrace: =========
> /lib64/libc.so.6[0x3b8a4760e6]
> /lib64/libc.so.6[0x3b8a478c13]
> 
/usr/lib64/libboost_python.so.5(_ZN5boost6python15instance_holder10deallocateEP7_objectPv+0x15)
[0x7f15ee57a0b5]
> /usr/lib64/libboost_python.so.5(+0x2a394)[0x7f15ee57a394]
> /usr/lib64/libpython2.6.so.1.0[0x3b9de9a715]
> /usr/lib64/libpython2.6.so.1.0[0x3b9de78287]
> /usr/lib64/libpython2.6.so.1.0(PyDict_SetItem+0xa7)[0x3b9de7acf7]
> /usr/lib64/libpython2.6.so.1.0(_PyModule_Clear+0x16d)[0x3b9de7c66d]
> /usr/lib64/libpython2.6.so.1.0(PyImport_Cleanup+0x18f)[0x3b9dee987f]
> /usr/lib64/libpython2.6.so.1.0(Py_Finalize+0x11b)[0x3b9def28ab]
> /usr/lib64/libpython2.6.so.1.0(Py_Main+0x596)[0x3b9deff2d6]
> /lib64/libc.so.6(__libc_start_main+0xfd)[0x3b8a41ecdd]
> python[0x400649]
> 
> 
> the class CMOOSApp is defined here:
> 
> https://oceanai.mit.edu/svn/moos-ivp-aro/releases/moos-ivp-13.5/MOOS_V10Beta_rc2/MOOSCore/Core/libMOOS/App/include/MOOS/libMOOS/App/MOOSApp.h
> 
> my complete code can be found here on the off chance someone wants to
> tinker with it:
> 
> https://bitbucket.org/ariovistus/moos-python

These issues can usually be traced using valgrind


From arbitraryvalue at gmail.com  Fri Sep  6 18:51:47 2013
From: arbitraryvalue at gmail.com (Alex K)
Date: Fri, 6 Sep 2013 12:51:47 -0400
Subject: [C++-sig] Segfault when passing pointer from C++ to Python via
	Boost Python
Message-ID: <CAELmHLrKTuhFxn5Ej3N4WfBt95zHRW6eYt+c+A-KHxH+oNajVA@mail.gmail.com>

Hello all,


I am having issues passing pointers from C++ to python, as I describe here:

http://stackoverflow.com/questions/18646694/pass-pointer-from-c-to-python-w-boost-python

In short, even the example of "Raw C++ pointers" from here:

https://wiki.python.org/moin/boost.python/PointersAndSmartPointers

causes a segfault when I compile and run it, although I can use other
features of Boost Python successfully.  The crash appears to be a segfault
from invoke.hpp, in this function:

template <class RC, class F BOOST_PP_ENUM_TRAILING_PARAMS_Z(1, N, class AC)>
inline PyObject* invoke(invoke_tag_<false,false>, RC const& rc, F& f
BOOST_PP_ENUM_TRAILING_BINARY_PARAMS_Z(1, N, AC, & ac) )
{
    return rc(f( BOOST_PP_ENUM_BINARY_PARAMS_Z(1, N, ac, ()
BOOST_PP_INTERCEPT) ));
}

Does anyone have any suggestions?


Thanks,

Alex
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From simwarg at gmail.com  Tue Sep 10 14:37:39 2013
From: simwarg at gmail.com (Simon W)
Date: Tue, 10 Sep 2013 14:37:39 +0200
Subject: [C++-sig] import extension module in python on OSX
Message-ID: <CA+0NA=09y+T4gQz10vUcnDu695cW174W3th-pVKOe7iVHCxBBQ@mail.gmail.com>

Hello,

I've compiled the example code for Boost.Python:

#include <boost/python.hpp>

char const* greet()

{

    return "hello, world";

}

BOOST_PYTHON_MODULE(hello_ext)

{

    using namespace boost::python;

    def("greet", greet);

}


It compiles and I got an BoostPythonTest.dylib produced by Xcode. I've
tried to put that file in my site-packages folder and som other places in
order to import it into the interpreter like:

import BoostPythonTest

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

ImportError: No module named 'BoostPythonTest'

>>>
I've tried to rename it to BoostPythonTest.so and .pyd and so on: But it
doesn't work. What is the proper extension name for boost python modules on
OSX? I'm using boost 1.53, OSX 1.8 and Python 3.2

Thanks in advance,
Simon
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From wmamrak at gmail.com  Thu Sep 12 00:54:22 2013
From: wmamrak at gmail.com (Wojciech Mamrak)
Date: Thu, 12 Sep 2013 00:54:22 +0200
Subject: [C++-sig] import extension module in python on OSX
In-Reply-To: <CA+0NA=09y+T4gQz10vUcnDu695cW174W3th-pVKOe7iVHCxBBQ@mail.gmail.com>
References: <CA+0NA=09y+T4gQz10vUcnDu695cW174W3th-pVKOe7iVHCxBBQ@mail.gmail.com>
Message-ID: <CAMhLx03Lscphhhupqn9wq8=awCwEbQ05h45uXKaQV5sA3pdD7g@mail.gmail.com>

why didn't you follow the example to the end?

Your module is called 'hello_ext'.

2013/9/10 Simon W <simwarg at gmail.com>:
> Hello,
>
> I've compiled the example code for Boost.Python:
>
> #include <boost/python.hpp>
>
> char const* greet()
>
> {
>
>     return "hello, world";
>
> }
>
> BOOST_PYTHON_MODULE(hello_ext)
>
> {
>
>     using namespace boost::python;
>
>     def("greet", greet);
>
> }
>
>
> It compiles and I got an BoostPythonTest.dylib produced by Xcode. I've tried
> to put that file in my site-packages folder and som other places in order to
> import it into the interpreter like:
>
> import BoostPythonTest
>
> Traceback (most recent call last):
>
>   File "<stdin>", line 1, in <module>
>
> ImportError: No module named 'BoostPythonTest'
>
>>>>
>
> I've tried to rename it to BoostPythonTest.so and .pyd and so on: But it
> doesn't work. What is the proper extension name for boost python modules on
> OSX? I'm using boost 1.53, OSX 1.8 and Python 3.2
>
> Thanks in advance,
> Simon
>
> _______________________________________________
> Cplusplus-sig mailing list
> Cplusplus-sig at python.org
> https://mail.python.org/mailman/listinfo/cplusplus-sig

From wamplerd at gmail.com  Sun Sep 15 00:59:42 2013
From: wamplerd at gmail.com (Dave Wampler)
Date: Sat, 14 Sep 2013 18:59:42 -0400
Subject: [C++-sig] pyplusplus generate for strict with char* member
Message-ID: <-8316938237133242055@unknownmsgid>

When I try to expose a struct with a char* member,  I get a warning
that pointer members aren't supported currently.

Considering char* is so common in existing APIs, is there a current
workaround or example (like conversion to std::string)?

Thanks,

Dave

From ismail.savaskan at roketsan.com.tr  Tue Sep 17 09:47:26 2013
From: ismail.savaskan at roketsan.com.tr (=?iso-8859-3?Q?=A9smail_SAVA=AAKAN?=)
Date: Tue, 17 Sep 2013 07:47:26 +0000
Subject: [C++-sig] Py++: How to pickle a boost.python object?
Message-ID: <D8FC725F8D57E7458224425BCD89C98C41424447@RSXMBX2.roketsan.com.tr>

Hi,

Is it possible to pickle an object loaded from a c++ library which contains py++ auto-generated code?

For example a c++ struct:
struct Coordinate
{
    int x;
    int y;
};

And its wrapper:
BOOST_PYTHON_MODULE(pyplusplus_test){
    bp::class_< Coordinate >( "Coordinate" )
        .def_readwrite( "x", &Coordinate::x )
        .def_readwrite( "y", &Coordinate::y );
}

I built pyplusplus_test.so libray. Then I wrote a script such as:

import sys
import pickle

sys.path.append('.')

import pyplusplus_test

cord = pyplusplus_test.Coordinate()
cord.x = 23
cord.y = -11
pickle.dumps(cord)

But it failed. The message is "RuntimeError: Pickling of "pyplusplus_test.Coordinate" instances is not enabled (http://www.boost.org/libs/python/doc/v2/pickle.html)"

I know that I can arrange generated code adding def_pickle() calls. But I want to generate wrappers automatically.

Any suggestion?

Thanks.





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From developerdeveloper at yahoo.com  Thu Sep 19 15:23:37 2013
From: developerdeveloper at yahoo.com (Q Q)
Date: Thu, 19 Sep 2013 06:23:37 -0700 (PDT)
Subject: [C++-sig] boost.python: Is a way to auto-fill __dict__ attribute?
Message-ID: <1379597017.44902.YahooMailNeo@web161705.mail.bf1.yahoo.com>

Hi,

The python objects exposed from C++ classes via boost.python have empty __dict__ attributes.
I generated python wrappers using py++.

Can I access __dict__ attributes for boost.python objects?

Thanks.
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From kassiopik at gmail.com  Sat Sep 21 16:52:31 2013
From: kassiopik at gmail.com (Kassiopi Kassiopi2)
Date: Sat, 21 Sep 2013 17:52:31 +0300
Subject: [C++-sig] Boost python simple interfacing
Message-ID: <CALu_b29HXfnAxKeSOEsGC8UXsOaafbSEove5rMTZr+ByHWtynw@mail.gmail.com>

Hi,

I want to call a c++ function from an embedded python shell, using boost
python. All the examples I've seen online describe how to expose a whole
class or some functions, but all cases refer to *standalone* parts of code.
My case is different though. The function I want to expose is not
standalone, and has a dependency:

------- start of documentModule.cpp --------
#include <commandManager.hpp>
#include <boost/python.hpp>

void newDocument( bool makeActive ) {
     // depends on commandManager here
    GetCommandMananager()->submitCommand( new newDocumentCmd( makeActive )
);
}

BOOST_PYTHON(documentModule) {
    using namespace boost::python;
    def( "newDocument", myCadLib::pythonCommands::newDocument,
arg("makeActive") );
}
------- end of documentModule.cpp --------

In reality the situation is more complicated and there are more
dependencies than the one mentioned above.
After generating a .so file with distutils, when I start my application and
I attempt to load the module (.so file) in the embedded python shell I get
an undefined symbols error complaining about the commandManager class.
Of course this is a reasonable request from python and I understand that.
However, I don't really care to generate a standalone python module per se.
I just want it to work in my application's embedded python shell.
Additionally, it wouldn't be meaningful to have the commandManager class
exposed as well, since this is part of my applications internal structure.
Is what I am asking possible with boost python? In the past I have used
SWIG for that, and it generated some additional .cpp and .h files, as well
as a .py module. I can live with generating additional source and header
files if it is an issue for boost python and I don't care to have a
standalone python module, as long as it works inside my application.
I couldn't find anything online as well. All examples I could find where
similar to the boost python tutorial, with standalone parts of code.

Thank you in advance.
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From cedric.gestes at gmail.com  Mon Sep 23 10:04:00 2013
From: cedric.gestes at gmail.com (Cedric GESTES)
Date: Mon, 23 Sep 2013 10:04:00 +0200
Subject: [C++-sig] Boost python simple interfacing
In-Reply-To: <CALu_b29HXfnAxKeSOEsGC8UXsOaafbSEove5rMTZr+ByHWtynw@mail.gmail.com>
References: <CALu_b29HXfnAxKeSOEsGC8UXsOaafbSEove5rMTZr+ByHWtynw@mail.gmail.com>
Message-ID: <CAENT2bJHdXfnKBmdPpXeeejsrYeX8aZyd7WwdM39bKZ4fGgFYA@mail.gmail.com>

On Sep 23, 2013 1:48 AM, "Kassiopi Kassiopi2" <kassiopik at gmail.com> wrote:
>
> Hi,
>
> I want to call a c++ function from an embedded python shell, using boost
python. All the examples I've seen online describe how to expose a whole
class or some functions, but all cases refer to standalone parts of code.
> My case is different though. The function I want to expose is not
standalone, and has a dependency:
>
> ------- start of documentModule.cpp --------
> #include <commandManager.hpp>
> #include <boost/python.hpp>
>
> void newDocument( bool makeActive ) {
>      // depends on commandManager here
>     GetCommandMananager()->submitCommand( new newDocumentCmd( makeActive
) );
> }
>
> BOOST_PYTHON(documentModule) {
>     using namespace boost::python;
>     def( "newDocument", myCadLib::pythonCommands::newDocument,
arg("makeActive") );
> }
> ------- end of documentModule.cpp --------
>
> In reality the situation is more complicated and there are more
dependencies than the one mentioned above.
> After generating a .so file with distutils, when I start my application
and I attempt to load the module (.so file) in the embedded python shell I
get an undefined symbols error complaining about the commandManager class.
do you link the library containing commandManager to your python extension?
> Of course this is a reasonable request from python and I understand that.
However, I don't really care to generate a standalone python module per se.
I just want it to work in my application's embedded python shell.
Additionally, it wouldn't be meaningful to have the commandManager class
exposed as well, since this is part of my applications internal structure.
> Is what I am asking possible with boost python? In the past I have used
SWIG for that, and it generated some additional .cpp and .h files, as well
as a .py module. I can live with generating additional source and header
files if it is an issue for boost python and I don't care to have a
standalone python module, as long as it works inside my application.
> I couldn't find anything online as well. All examples I could find where
similar to the boost python tutorial, with standalone parts of code.
>
> Thank you in advance.
>
>
>
>
> _______________________________________________
> Cplusplus-sig mailing list
> Cplusplus-sig at python.org
> https://mail.python.org/mailman/listinfo/cplusplus-sig
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From j.reid at mail.cryst.bbk.ac.uk  Tue Sep 24 09:31:42 2013
From: j.reid at mail.cryst.bbk.ac.uk (John Reid)
Date: Tue, 24 Sep 2013 08:31:42 +0100
Subject: [C++-sig] Use alternative launcher for bpl-test rule
Message-ID: <l1rf4l$7u4$1@ger.gmane.org>

Hi,

I'm having some problems asking boost.build to start the debugger or
valgrind when it runs some of my python extension bpl-test rules. I saw
in the boost.build code some comments that suggests it hijacks the
testing.launcher feature which I thought would be the way to do this.
Does anyone know if it is possible and what I should be doing?

Thanks,
John.


From giuseppe.corbelli at copanitalia.com  Tue Sep 24 09:33:17 2013
From: giuseppe.corbelli at copanitalia.com (Giuseppe Corbelli)
Date: Tue, 24 Sep 2013 09:33:17 +0200
Subject: [C++-sig] Boost python simple interfacing
In-Reply-To: <CALu_b29HXfnAxKeSOEsGC8UXsOaafbSEove5rMTZr+ByHWtynw@mail.gmail.com>
References: <CALu_b29HXfnAxKeSOEsGC8UXsOaafbSEove5rMTZr+ByHWtynw@mail.gmail.com>
Message-ID: <5241403D.6000906@copanitalia.com>

On 21/09/2013 16:52, Kassiopi Kassiopi2 wrote:
> Hi,
>
> I want to call a c++ function from an embedded python shell, using boost
> python. All the examples I've seen online describe how to expose a whole class
> or some functions, but all cases refer to *standalone* parts of code.
> My case is different though. The function I want to expose is not standalone,
> and has a dependency:
>
> ------- start of documentModule.cpp --------
> #include <commandManager.hpp>
> #include <boost/python.hpp>
>
> void newDocument( bool makeActive ) {
>       // depends on commandManager here
>      GetCommandMananager()->submitCommand( new newDocumentCmd( makeActive ) );
> }
>
> BOOST_PYTHON(documentModule) {
>      using namespace boost::python;
>      def( "newDocument", myCadLib::pythonCommands::newDocument,
> arg("makeActive") );
> }
> ------- end of documentModule.cpp --------
>
> In reality the situation is more complicated and there are more dependencies
> than the one mentioned above.
> After generating a .so file with distutils, when I start my application and I
> attempt to load the module (.so file) in the embedded python shell I get an
> undefined symbols error complaining about the commandManager class.
> Of course this is a reasonable request from python and I understand that.
> However, I don't really care to generate a standalone python module per se. I
> just want it to work in my application's embedded python shell. Additionally,
> it wouldn't be meaningful to have the commandManager class exposed as well,
> since this is part of my applications internal structure.

Seems to me you want both extending and embedding. Never embedded an 
interpreter in a C++ app, so I'm not of much use here.
The two jobs should be fairly independent. Producing the .so to extend the 
interpreter needs to link the commandManager library.
Your extension module needs to access the Command Manager, so make sure it has 
already been initialized before the module is loaded, else the 
GetCommandManager() may return NULL.

-- 
             Giuseppe Corbelli
WASP Software Engineer, Copan Italia S.p.A
Phone: +390303666318  Fax: +390302659932
E-mail: giuseppe.corbelli at copanitalia.com

From wamplerd at gmail.com  Mon Sep 23 03:30:45 2013
From: wamplerd at gmail.com (Dave Wampler)
Date: Sun, 22 Sep 2013 21:30:45 -0400
Subject: [C++-sig] Boost python simple interfacing
In-Reply-To: <CALu_b29HXfnAxKeSOEsGC8UXsOaafbSEove5rMTZr+ByHWtynw@mail.gmail.com>
References: <CALu_b29HXfnAxKeSOEsGC8UXsOaafbSEove5rMTZr+ByHWtynw@mail.gmail.com>
Message-ID: <5032933403680633892@unknownmsgid>

What you're trying to do is fine.  You only need to expose the interface
that python is accessing.  You do need to link in the library that contains
the symbols for the commandManager class however.

On Sep 22, 2013, at 7:48 PM, Kassiopi Kassiopi2 <kassiopik at gmail.com> wrote:

Hi,

I want to call a c++ function from an embedded python shell, using boost
python. All the examples I've seen online describe how to expose a whole
class or some functions, but all cases refer to *standalone* parts of code.
My case is different though. The function I want to expose is not
standalone, and has a dependency:

------- start of documentModule.cpp --------
#include <commandManager.hpp>
#include <boost/python.hpp>

void newDocument( bool makeActive ) {
     // depends on commandManager here
    GetCommandMananager()->submitCommand( new newDocumentCmd( makeActive )
);
}

BOOST_PYTHON(documentModule) {
    using namespace boost::python;
    def( "newDocument", myCadLib::pythonCommands::newDocument,
arg("makeActive") );
}
------- end of documentModule.cpp --------

In reality the situation is more complicated and there are more
dependencies than the one mentioned above.
After generating a .so file with distutils, when I start my application and
I attempt to load the module (.so file) in the embedded python shell I get
an undefined symbols error complaining about the commandManager class.
Of course this is a reasonable request from python and I understand that.
However, I don't really care to generate a standalone python module per se.
I just want it to work in my application's embedded python shell.
Additionally, it wouldn't be meaningful to have the commandManager class
exposed as well, since this is part of my applications internal structure.
Is what I am asking possible with boost python? In the past I have used
SWIG for that, and it generated some additional .cpp and .h files, as well
as a .py module. I can live with generating additional source and header
files if it is an issue for boost python and I don't care to have a
standalone python module, as long as it works inside my application.
I couldn't find anything online as well. All examples I could find where
similar to the boost python tutorial, with standalone parts of code.

Thank you in advance.



_______________________________________________
Cplusplus-sig mailing list
Cplusplus-sig at python.org
https://mail.python.org/mailman/listinfo/cplusplus-sig
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From raghavendra.jain at gmail.com  Tue Sep 24 10:06:31 2013
From: raghavendra.jain at gmail.com (Raghvendra Jain)
Date: Tue, 24 Sep 2013 17:06:31 +0900
Subject: [C++-sig] Boost python simple interfacing
In-Reply-To: <5241403D.6000906@copanitalia.com>
References: <CALu_b29HXfnAxKeSOEsGC8UXsOaafbSEove5rMTZr+ByHWtynw@mail.gmail.com>
 <5241403D.6000906@copanitalia.com>
Message-ID: <CAGFMWUgEXNVfQqBkcZqaMnmpe_oPmQthAHUQ+V6y=fO0me+-fQ@mail.gmail.com>

Well, I have embedded an interpreter inside  C++ code, if your question is
related to that, please write back. May be I can help you with that.
cheers,
Raghav


On Tue, Sep 24, 2013 at 4:33 PM, Giuseppe Corbelli <
giuseppe.corbelli at copanitalia.com> wrote:

> On 21/09/2013 16:52, Kassiopi Kassiopi2 wrote:
>
>> Hi,
>>
>> I want to call a c++ function from an embedded python shell, using boost
>> python. All the examples I've seen online describe how to expose a whole
>> class
>> or some functions, but all cases refer to *standalone* parts of code.
>>
>> My case is different though. The function I want to expose is not
>> standalone,
>> and has a dependency:
>>
>> ------- start of documentModule.cpp --------
>> #include <commandManager.hpp>
>> #include <boost/python.hpp>
>>
>> void newDocument( bool makeActive ) {
>>       // depends on commandManager here
>>      GetCommandMananager()->**submitCommand( new newDocumentCmd(
>> makeActive ) );
>> }
>>
>> BOOST_PYTHON(documentModule) {
>>      using namespace boost::python;
>>      def( "newDocument", myCadLib::pythonCommands::**newDocument,
>> arg("makeActive") );
>> }
>> ------- end of documentModule.cpp --------
>>
>> In reality the situation is more complicated and there are more
>> dependencies
>> than the one mentioned above.
>> After generating a .so file with distutils, when I start my application
>> and I
>> attempt to load the module (.so file) in the embedded python shell I get
>> an
>> undefined symbols error complaining about the commandManager class.
>> Of course this is a reasonable request from python and I understand that.
>> However, I don't really care to generate a standalone python module per
>> se. I
>> just want it to work in my application's embedded python shell.
>> Additionally,
>> it wouldn't be meaningful to have the commandManager class exposed as
>> well,
>> since this is part of my applications internal structure.
>>
>
> Seems to me you want both extending and embedding. Never embedded an
> interpreter in a C++ app, so I'm not of much use here.
> The two jobs should be fairly independent. Producing the .so to extend the
> interpreter needs to link the commandManager library.
> Your extension module needs to access the Command Manager, so make sure it
> has already been initialized before the module is loaded, else the
> GetCommandManager() may return NULL.
>
> --
>             Giuseppe Corbelli
> WASP Software Engineer, Copan Italia S.p.A
> Phone: +390303666318  Fax: +390302659932
> E-mail: giuseppe.corbelli at copanitalia.**com<giuseppe.corbelli at copanitalia.com>
>
> ______________________________**_________________
> Cplusplus-sig mailing list
> Cplusplus-sig at python.org
> https://mail.python.org/**mailman/listinfo/cplusplus-sig<https://mail.python.org/mailman/listinfo/cplusplus-sig>
>
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From ndbecker2 at gmail.com  Wed Sep 25 17:22:22 2013
From: ndbecker2 at gmail.com (Neal Becker)
Date: Wed, 25 Sep 2013 11:22:22 -0400
Subject: [C++-sig] memory leak with __iadd__
Message-ID: <l1uv36$v8h$1@ger.gmane.org>

I've been trying to track down a memory leak.  When I use the following:

 .def ("__iadd__", &hist_t::operator+=, bp::return_self<>())

I have a leak.

When changed to:

 .def (bp::self += hist_t::value_type())

there is no leak.  Any ideas?  I suppose I maybe should just start using the 
latter style and forget the former.



From nikolay.mladenov at gmail.com  Wed Sep 25 19:02:03 2013
From: nikolay.mladenov at gmail.com (Nikolay Mladenov)
Date: Wed, 25 Sep 2013 13:02:03 -0400
Subject: [C++-sig] memory leak with __iadd__
In-Reply-To: <l1uv36$v8h$1@ger.gmane.org>
References: <l1uv36$v8h$1@ger.gmane.org>
Message-ID: <CACbdn-KAi3UdGqDRXh3D=E-c9eKzfZjniDuaLcv5F84go35gWA@mail.gmail.com>

On Wed, Sep 25, 2013 at 11:22 AM, Neal Becker <ndbecker2 at gmail.com> wrote:

> I've been trying to track down a memory leak.  When I use the following:
>
>  .def ("__iadd__", &hist_t::operator+=, bp::return_self<>())
>

but this is no different then any other function def with return_self<>
policy (which i do a lot)?
when do you observe the leak? during def or during a+b in python?



>
> I have a leak.
>
> When changed to:
>
>  .def (bp::self += hist_t::value_type())
>
> there is no leak.  Any ideas?  I suppose I maybe should just start using
> the
> latter style and forget the former.
>
>
> _______________________________________________
> Cplusplus-sig mailing list
> Cplusplus-sig at python.org
> https://mail.python.org/mailman/listinfo/cplusplus-sig
>
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From kassiopik at gmail.com  Wed Sep 25 22:06:57 2013
From: kassiopik at gmail.com (Kassiopi Kassiopi2)
Date: Wed, 25 Sep 2013 23:06:57 +0300
Subject: [C++-sig] Boost python simple interfacing
In-Reply-To: <CAGFMWUgEXNVfQqBkcZqaMnmpe_oPmQthAHUQ+V6y=fO0me+-fQ@mail.gmail.com>
References: <CALu_b29HXfnAxKeSOEsGC8UXsOaafbSEove5rMTZr+ByHWtynw@mail.gmail.com>
 <5241403D.6000906@copanitalia.com>
 <CAGFMWUgEXNVfQqBkcZqaMnmpe_oPmQthAHUQ+V6y=fO0me+-fQ@mail.gmail.com>
Message-ID: <CALu_b29v9ZsWhp=CMwFKVoHbbQNfY-Mm-cMm9KMDup+HBxk2Bg@mail.gmail.com>

Hi,

I apologize for the delayed reply.

I was hoping to avoid linking the commandManager into the .so file. I am
trying to avoid that because then, I will have to do this for any other
module that I create and uses the commandManager. I would prefer to declare
it as extern or something similar if possible. If I link it into to .so,
then I will have to link it to all the modules I intend to create,
separately. Moreover, the commandManager is statically linked into my
executable, so linking it in every single python module, feels like
overkill.
Furthermore, since my call to the commandManager looks like:

GetCommandManager()->submitCommand( new newDocumentCommand(makeActive) );

I will have to also link against the commands that will be sent to the
commandManager as well. And if there are hundreds of commands, it's obvious
that there is a lot of redundant stuff, since all these classes are also
declared, defined and statically linked in the executable of my application.

So it all ends up to the question: Is it absolutely necessary? No other way?


On Tue, Sep 24, 2013 at 11:06 AM, Raghvendra Jain <
raghavendra.jain at gmail.com> wrote:

> Well, I have embedded an interpreter inside  C++ code, if your question is
> related to that, please write back. May be I can help you with that.
> cheers,
> Raghav
>
>
> On Tue, Sep 24, 2013 at 4:33 PM, Giuseppe Corbelli <
> giuseppe.corbelli at copanitalia.com> wrote:
>
>> On 21/09/2013 16:52, Kassiopi Kassiopi2 wrote:
>>
>>> Hi,
>>>
>>> I want to call a c++ function from an embedded python shell, using boost
>>> python. All the examples I've seen online describe how to expose a whole
>>> class
>>> or some functions, but all cases refer to *standalone* parts of code.
>>>
>>> My case is different though. The function I want to expose is not
>>> standalone,
>>> and has a dependency:
>>>
>>> ------- start of documentModule.cpp --------
>>> #include <commandManager.hpp>
>>> #include <boost/python.hpp>
>>>
>>> void newDocument( bool makeActive ) {
>>>       // depends on commandManager here
>>>      GetCommandMananager()->**submitCommand( new newDocumentCmd(
>>> makeActive ) );
>>> }
>>>
>>> BOOST_PYTHON(documentModule) {
>>>      using namespace boost::python;
>>>      def( "newDocument", myCadLib::pythonCommands::**newDocument,
>>> arg("makeActive") );
>>> }
>>> ------- end of documentModule.cpp --------
>>>
>>> In reality the situation is more complicated and there are more
>>> dependencies
>>> than the one mentioned above.
>>> After generating a .so file with distutils, when I start my application
>>> and I
>>> attempt to load the module (.so file) in the embedded python shell I get
>>> an
>>> undefined symbols error complaining about the commandManager class.
>>> Of course this is a reasonable request from python and I understand that.
>>> However, I don't really care to generate a standalone python module per
>>> se. I
>>> just want it to work in my application's embedded python shell.
>>> Additionally,
>>> it wouldn't be meaningful to have the commandManager class exposed as
>>> well,
>>> since this is part of my applications internal structure.
>>>
>>
>> Seems to me you want both extending and embedding. Never embedded an
>> interpreter in a C++ app, so I'm not of much use here.
>> The two jobs should be fairly independent. Producing the .so to extend
>> the interpreter needs to link the commandManager library.
>> Your extension module needs to access the Command Manager, so make sure
>> it has already been initialized before the module is loaded, else the
>> GetCommandManager() may return NULL.
>>
>> --
>>             Giuseppe Corbelli
>> WASP Software Engineer, Copan Italia S.p.A
>> Phone: +390303666318  Fax: +390302659932
>> E-mail: giuseppe.corbelli at copanitalia.**com<giuseppe.corbelli at copanitalia.com>
>>
>> ______________________________**_________________
>> Cplusplus-sig mailing list
>> Cplusplus-sig at python.org
>> https://mail.python.org/**mailman/listinfo/cplusplus-sig<https://mail.python.org/mailman/listinfo/cplusplus-sig>
>>
>
>
> _______________________________________________
> Cplusplus-sig mailing list
> Cplusplus-sig at python.org
> https://mail.python.org/mailman/listinfo/cplusplus-sig
>
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From ndbecker2 at gmail.com  Thu Sep 26 16:44:08 2013
From: ndbecker2 at gmail.com (Neal Becker)
Date: Thu, 26 Sep 2013 10:44:08 -0400
Subject: [C++-sig] memory leak with __iadd__
References: <l1uv36$v8h$1@ger.gmane.org>
 <CACbdn-KAi3UdGqDRXh3D=E-c9eKzfZjniDuaLcv5F84go35gWA@mail.gmail.com>
Message-ID: <l21h7f$e4o$1@ger.gmane.org>

Nikolay Mladenov wrote:

> On Wed, Sep 25, 2013 at 11:22 AM, Neal Becker <ndbecker2 at gmail.com> wrote:
> 
>> I've been trying to track down a memory leak.  When I use the following:
>>
>>  .def ("__iadd__", &hist_t::operator+=, bp::return_self<>())
>>
> 
> but this is no different then any other function def with return_self<>
> policy (which i do a lot)?
> when do you observe the leak? during def or during a+b in python?
> 
> 

The leak must be in using +=.  The def is only executed once.  This is a big 
leak, causing eventual OOM.


From giuseppe.corbelli at copanitalia.com  Fri Sep 27 12:39:46 2013
From: giuseppe.corbelli at copanitalia.com (Giuseppe Corbelli)
Date: Fri, 27 Sep 2013 12:39:46 +0200
Subject: [C++-sig] Boost python simple interfacing
In-Reply-To: <CALu_b29v9ZsWhp=CMwFKVoHbbQNfY-Mm-cMm9KMDup+HBxk2Bg@mail.gmail.com>
References: <CALu_b29HXfnAxKeSOEsGC8UXsOaafbSEove5rMTZr+ByHWtynw@mail.gmail.com>
 <5241403D.6000906@copanitalia.com>
 <CAGFMWUgEXNVfQqBkcZqaMnmpe_oPmQthAHUQ+V6y=fO0me+-fQ@mail.gmail.com>
 <CALu_b29v9ZsWhp=CMwFKVoHbbQNfY-Mm-cMm9KMDup+HBxk2Bg@mail.gmail.com>
Message-ID: <52456072.50302@copanitalia.com>

On 25/09/2013 22:06, Kassiopi Kassiopi2 wrote:
> Hi,
>
> I apologize for the delayed reply.
>
> I was hoping to avoid linking the commandManager into the .so file. I am
> trying to avoid that because then, I will have to do this for any other module
> that I create and uses the commandManager. I would prefer to declare it as
> extern or something similar if possible. If I link it into to .so, then I will
> have to link it to all the modules I intend to create, separately. Moreover,
> the commandManager is statically linked into my executable, so linking it in
> every single python module, feels like overkill.
> Furthermore, since my call to the commandManager looks like:
>
> GetCommandManager()->submitCommand( new newDocumentCommand(makeActive) );
>
> I will have to also link against the commands that will be sent to the
> commandManager as well. And if there are hundreds of commands, it's obvious
> that there is a lot of redundant stuff, since all these classes are also
> declared, defined and statically linked in the executable of my application.

Well, the .so needs to have access to the GetCommandManager symbol, so I see 
no way out here. Besides it also needs to create newDocumentCommand instances, 
so it must have access to the constructor, too.
If command manager is something like a singleton make sure you're getting the 
same object in the C++ app and in the .so. Just declaring it static here and 
there doesn't work.
In theory you could also have a static python library without module support, 
and link everything static. I just don't know how much work would it take.

-- 
             Giuseppe Corbelli
WASP Software Engineer, Copan Italia S.p.A
Phone: +390303666318  Fax: +390302659932
E-mail: giuseppe.corbelli at copanitalia.com

From nikolay.mladenov at gmail.com  Thu Sep 26 19:18:04 2013
From: nikolay.mladenov at gmail.com (Nikolay Mladenov)
Date: Thu, 26 Sep 2013 13:18:04 -0400
Subject: [C++-sig] memory leak with __iadd__
In-Reply-To: <l21h7f$e4o$1@ger.gmane.org>
References: <l1uv36$v8h$1@ger.gmane.org>
 <CACbdn-KAi3UdGqDRXh3D=E-c9eKzfZjniDuaLcv5F84go35gWA@mail.gmail.com>
 <l21h7f$e4o$1@ger.gmane.org>
Message-ID: <CACbdn-JXf-pz99xf==gwjr3etMCCzd5zFibupgUut7rD8gwbjg@mail.gmail.com>

if you
.def ("test_iadd", &hist_t::operator+=, bp::return_self<>())

and you use it instead of += do you get the leak?


On Thu, Sep 26, 2013 at 10:44 AM, Neal Becker <ndbecker2 at gmail.com> wrote:

> Nikolay Mladenov wrote:
>
> > On Wed, Sep 25, 2013 at 11:22 AM, Neal Becker <ndbecker2 at gmail.com>
> wrote:
> >
> >> I've been trying to track down a memory leak.  When I use the following:
> >>
> >>  .def ("__iadd__", &hist_t::operator+=, bp::return_self<>())
> >>
> >
> > but this is no different then any other function def with return_self<>
> > policy (which i do a lot)?
> > when do you observe the leak? during def or during a+b in python?
> >
> >
>
> The leak must be in using +=.  The def is only executed once.  This is a
> big
> leak, causing eventual OOM.
>
> _______________________________________________
> Cplusplus-sig mailing list
> Cplusplus-sig at python.org
> https://mail.python.org/mailman/listinfo/cplusplus-sig
>
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From cedric.gestes at gmail.com  Fri Sep 27 14:06:24 2013
From: cedric.gestes at gmail.com (Cedric GESTES)
Date: Fri, 27 Sep 2013 14:06:24 +0200
Subject: [C++-sig] Boost python simple interfacing
In-Reply-To: <CALu_b29v9ZsWhp=CMwFKVoHbbQNfY-Mm-cMm9KMDup+HBxk2Bg@mail.gmail.com>
References: <CALu_b29HXfnAxKeSOEsGC8UXsOaafbSEove5rMTZr+ByHWtynw@mail.gmail.com>
 <5241403D.6000906@copanitalia.com>
 <CAGFMWUgEXNVfQqBkcZqaMnmpe_oPmQthAHUQ+V6y=fO0me+-fQ@mail.gmail.com>
 <CALu_b29v9ZsWhp=CMwFKVoHbbQNfY-Mm-cMm9KMDup+HBxk2Bg@mail.gmail.com>
Message-ID: <CAENT2bJe=qZDDrQ2RtBJFp5EOnm0s-WZqgz55qwqC+ozbSvZPA@mail.gmail.com>

On Wed, Sep 25, 2013 at 10:06 PM, Kassiopi Kassiopi2 <kassiopik at gmail.com>wrote:

> Hi,
>
> I apologize for the delayed reply.
>
> I was hoping to avoid linking the commandManager into the .so file. I am
> trying to avoid that because then, I will have to do this for any other
> module that I create and uses the commandManager. I would prefer to declare
> it as extern or something similar if possible. If I link it into to .so,
> then I will have to link it to all the modules I intend to create,
> separately. Moreover, the commandManager is statically linked into my
> executable, so linking it in every single python module, feels like
> overkill.
> Furthermore, since my call to the commandManager looks like:
>
> GetCommandManager()->submitCommand( new newDocumentCommand(makeActive) );
>
> I will have to also link against the commands that will be sent to the
> commandManager as well. And if there are hundreds of commands, it's obvious
> that there is a lot of redundant stuff, since all these classes are also
> declared, defined and statically linked in the executable of my application.
>
> So it all ends up to the question: Is it absolutely necessary? No other
> way?
>
Just link the command manager in dynamic everywhere. (you your singleton
will works that way)

>
>
> On Tue, Sep 24, 2013 at 11:06 AM, Raghvendra Jain <
> raghavendra.jain at gmail.com> wrote:
>
>> Well, I have embedded an interpreter inside  C++ code, if your question
>> is related to that, please write back. May be I can help you with that.
>> cheers,
>> Raghav
>>
>>
>> On Tue, Sep 24, 2013 at 4:33 PM, Giuseppe Corbelli <
>> giuseppe.corbelli at copanitalia.com> wrote:
>>
>>> On 21/09/2013 16:52, Kassiopi Kassiopi2 wrote:
>>>
>>>> Hi,
>>>>
>>>> I want to call a c++ function from an embedded python shell, using boost
>>>> python. All the examples I've seen online describe how to expose a
>>>> whole class
>>>> or some functions, but all cases refer to *standalone* parts of code.
>>>>
>>>> My case is different though. The function I want to expose is not
>>>> standalone,
>>>> and has a dependency:
>>>>
>>>> ------- start of documentModule.cpp --------
>>>> #include <commandManager.hpp>
>>>> #include <boost/python.hpp>
>>>>
>>>> void newDocument( bool makeActive ) {
>>>>       // depends on commandManager here
>>>>      GetCommandMananager()->**submitCommand( new newDocumentCmd(
>>>> makeActive ) );
>>>> }
>>>>
>>>> BOOST_PYTHON(documentModule) {
>>>>      using namespace boost::python;
>>>>      def( "newDocument", myCadLib::pythonCommands::**newDocument,
>>>> arg("makeActive") );
>>>> }
>>>> ------- end of documentModule.cpp --------
>>>>
>>>> In reality the situation is more complicated and there are more
>>>> dependencies
>>>> than the one mentioned above.
>>>> After generating a .so file with distutils, when I start my application
>>>> and I
>>>> attempt to load the module (.so file) in the embedded python shell I
>>>> get an
>>>> undefined symbols error complaining about the commandManager class.
>>>> Of course this is a reasonable request from python and I understand
>>>> that.
>>>> However, I don't really care to generate a standalone python module per
>>>> se. I
>>>> just want it to work in my application's embedded python shell.
>>>> Additionally,
>>>> it wouldn't be meaningful to have the commandManager class exposed as
>>>> well,
>>>> since this is part of my applications internal structure.
>>>>
>>>
>>> Seems to me you want both extending and embedding. Never embedded an
>>> interpreter in a C++ app, so I'm not of much use here.
>>> The two jobs should be fairly independent. Producing the .so to extend
>>> the interpreter needs to link the commandManager library.
>>> Your extension module needs to access the Command Manager, so make sure
>>> it has already been initialized before the module is loaded, else the
>>> GetCommandManager() may return NULL.
>>>
>>> --
>>>             Giuseppe Corbelli
>>> WASP Software Engineer, Copan Italia S.p.A
>>> Phone: +390303666318  Fax: +390302659932
>>> E-mail: giuseppe.corbelli at copanitalia.**com<giuseppe.corbelli at copanitalia.com>
>>>
>>> ______________________________**_________________
>>> Cplusplus-sig mailing list
>>> Cplusplus-sig at python.org
>>> https://mail.python.org/**mailman/listinfo/cplusplus-sig<https://mail.python.org/mailman/listinfo/cplusplus-sig>
>>>
>>
>>
>> _______________________________________________
>> Cplusplus-sig mailing list
>> Cplusplus-sig at python.org
>> https://mail.python.org/mailman/listinfo/cplusplus-sig
>>
>
>
> _______________________________________________
> Cplusplus-sig mailing list
> Cplusplus-sig at python.org
> https://mail.python.org/mailman/listinfo/cplusplus-sig
>
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From asu_mcs at yahoo.com  Mon Sep 30 17:40:29 2013
From: asu_mcs at yahoo.com (sam)
Date: Mon, 30 Sep 2013 08:40:29 -0700 (PDT)
Subject: [C++-sig] fault core dump error
In-Reply-To: <1332405580.70881.YahooMailClassic@web45212.mail.sp1.yahoo.com>
Message-ID: <1380555629.58902.YahooMailBasic@web160403.mail.bf1.yahoo.com>

Hello,
I wrote a C program that loop inside a folder which has about 200 text files. Each file has almost 60000 lines. I created 2D array [60000][200] to store files in it. No compilation problem at all, but when I try to run it I get this error (fault core dump). Yes I did use malloc()  
This is my code:

///////////////



#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>

#define WIDTH 200     // total number of files
#define HEIGHT 60000  // total number of lines for each file

int main ()
{

  double **array1; array1 [HEIGHT][WIDTH];
  
 
 int w ,h;
 int fnum = 1;
 char filename [64];
double *data;
 FILE * fpr; 
 FILE * fpw;


   // reading files data to array1 
   
     array1 = (double **) malloc(HEIGHT*sizeof(double));

   
   for (w=0;w<WIDTH;w++)
   {
      
	   sprintf(filename, "C:/User/data%d.txt", fnum);
	  ;
	                      
	   fpr = fopen(filename, "r");
	    
	   for (h=0;h<HEIGHT;h++)
	   {
	   array1[h] = (double *) malloc(WIDTH*sizeof(double));
	  

		  fscanf(fpr, "%lf",  &array1 [h][w]);
		    
		    fclose(fpr);
			
	   }


	  
	   fnum ++;
    }    
   

	return 0;
}


////////////////

Thank you,
Sam
 


From wright at esrf.fr  Mon Sep 30 17:49:20 2013
From: wright at esrf.fr (Jonathan WRIGHT)
Date: Mon, 30 Sep 2013 17:49:20 +0200
Subject: [C++-sig] fault core dump error
In-Reply-To: <1380555629.58902.YahooMailBasic@web160403.mail.bf1.yahoo.com>
References: <1380555629.58902.YahooMailBasic@web160403.mail.bf1.yahoo.com>
Message-ID: <52499D80.3060607@esrf.fr>

Hello,
You are reading on a closed file, try moving the fclose to the other 
side of the curly bracket.
HTH,
Jon
	
> 	   fpr = fopen(filename, "r");
> 	
> 	   for (h=0;h<HEIGHT;h++)
> 	   {
> 	   array1[h] = (double *) malloc(WIDTH*sizeof(double));
> 	
>
> 		  fscanf(fpr, "%lf",  &array1 [h][w]);
> 		
> 		    fclose(fpr);
> 			
> 	   }
>

From talljimbo at gmail.com  Mon Sep 30 17:56:51 2013
From: talljimbo at gmail.com (Jim Bosch)
Date: Mon, 30 Sep 2013 11:56:51 -0400
Subject: [C++-sig] fault core dump error
In-Reply-To: <1380555629.58902.YahooMailBasic@web160403.mail.bf1.yahoo.com>
References: <1380555629.58902.YahooMailBasic@web160403.mail.bf1.yahoo.com>
Message-ID: <52499F43.5070207@gmail.com>

I think you may be sending to a mailing list that isn't really appropriate for your questions; this list concerns integrating C++ with Python (often focusing on Boost.Python), not general C/C++ programming.

Good luck!

Jim



On 09/30/2013 11:40 AM, sam wrote:
> Hello,
> I wrote a C program that loop inside a folder which has about 200 text files. Each file has almost 60000 lines. I created 2D array [60000][200] to store files in it. No compilation problem at all, but when I try to run it I get this error (fault core dump). Yes I did use malloc()
> This is my code:
>
> ///////////////
>
>
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <math.h>
> #include <string.h>
>
> #define WIDTH 200     // total number of files
> #define HEIGHT 60000  // total number of lines for each file
>
> int main ()
> {
>
>    double **array1; array1 [HEIGHT][WIDTH];
>
>
>   int w ,h;
>   int fnum = 1;
>   char filename [64];
> double *data;
>   FILE * fpr;
>   FILE * fpw;
>
>
>     // reading files data to array1
>
>       array1 = (double **) malloc(HEIGHT*sizeof(double));
>
>
>     for (w=0;w<WIDTH;w++)
>     {
>
> 	   sprintf(filename, "C:/User/data%d.txt", fnum);
> 	  ;
> 	
> 	   fpr = fopen(filename, "r");
> 	
> 	   for (h=0;h<HEIGHT;h++)
> 	   {
> 	   array1[h] = (double *) malloc(WIDTH*sizeof(double));
> 	
>
> 		  fscanf(fpr, "%lf",  &array1 [h][w]);
> 		
> 		    fclose(fpr);
> 			
> 	   }
>
>
> 	
> 	   fnum ++;
>      }
>
>
> 	return 0;
> }
>
>
> ////////////////
>
> Thank you,
> Sam
>
>
> _______________________________________________
> Cplusplus-sig mailing list
> Cplusplus-sig at python.org
> https://mail.python.org/mailman/listinfo/cplusplus-sig
>


From asu_mcs at yahoo.com  Mon Sep 30 18:11:15 2013
From: asu_mcs at yahoo.com (sam)
Date: Mon, 30 Sep 2013 09:11:15 -0700 (PDT)
Subject: [C++-sig] fault core dump error
In-Reply-To: <52499D80.3060607@esrf.fr>
Message-ID: <1380557475.54044.YahooMailBasic@web160401.mail.bf1.yahoo.com>

Thank you Jonathan for your quick response.

well, i did move it. still same problem. it has something to do with memory


--------------------------------------------
On Mon, 9/30/13, Jonathan WRIGHT <wright at esrf.fr> wrote:

 Subject: Re: [C++-sig] fault core dump error
 To: cplusplus-sig at python.org
 Date: Monday, September 30, 2013, 9:49 AM
 
 Hello,
 You are reading on a closed file, try moving the fclose to
 the other 
 side of the curly bracket.
 HTH,
 Jon
 ??? 
 > ??? ???fpr =
 fopen(filename, "r");
 > ??? 
 > ??? ???for
 (h=0;h<HEIGHT;h++)
 > ??? ???{
 > ??? ???array1[h] =
 (double *) malloc(WIDTH*sizeof(double));
 > ??? 
 >
 > ??? ??? ?
 fscanf(fpr, "%lf",? &array1 [h][w]);
 > ??? ??? 
 > ??? ??? ? ?
 fclose(fpr);
 > ??? ???
 ??? 
 > ??? ???}
 >
 _______________________________________________
 Cplusplus-sig mailing list
 Cplusplus-sig at python.org
 https://mail.python.org/mailman/listinfo/cplusplus-sig
 

From brandsmeier at gmx.de  Mon Sep 30 18:18:56 2013
From: brandsmeier at gmx.de (Holger Brandsmeier)
Date: Mon, 30 Sep 2013 18:18:56 +0200
Subject: [C++-sig] fault core dump error
In-Reply-To: <1380555629.58902.YahooMailBasic@web160403.mail.bf1.yahoo.com>
References: <1332405580.70881.YahooMailClassic@web45212.mail.sp1.yahoo.com>
 <1380555629.58902.YahooMailBasic@web160403.mail.bf1.yahoo.com>
Message-ID: <CAFP7zVujZF5LZcGEQMM20n4YvejZkbX54LFfypLT72+JzmnRqQ@mail.gmail.com>

Sam,

this looks really awful:
  double **array1; array1 [HEIGHT][WIDTH];
do you mean:
  double **array1; //array1 [HEIGHT][WIDTH];

But this might not be your probablem. You say " folder which has about
200 text files", but your code is treating this as "exactly 200 text
files", you need to do something there.

Then again please recall the reminder of Jim Bosch and maybe post this
problem on a different list, maybe stackexchange?

-Holger


On Mon, Sep 30, 2013 at 5:40 PM, sam <asu_mcs at yahoo.com> wrote:
> Hello,
> I wrote a C program that loop inside a folder which has about 200 text files. Each file has almost 60000 lines. I created 2D array [60000][200] to store files in it. No compilation problem at all, but when I try to run it I get this error (fault core dump). Yes I did use malloc()
> This is my code:
>
> ///////////////
>
>
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <math.h>
> #include <string.h>
>
> #define WIDTH 200     // total number of files
> #define HEIGHT 60000  // total number of lines for each file
>
> int main ()
> {
>
>   double **array1; array1 [HEIGHT][WIDTH];
>
>
>  int w ,h;
>  int fnum = 1;
>  char filename [64];
> double *data;
>  FILE * fpr;
>  FILE * fpw;
>
>
>    // reading files data to array1
>
>      array1 = (double **) malloc(HEIGHT*sizeof(double));
>
>
>    for (w=0;w<WIDTH;w++)
>    {
>
>            sprintf(filename, "C:/User/data%d.txt", fnum);
>           ;
>
>            fpr = fopen(filename, "r");
>
>            for (h=0;h<HEIGHT;h++)
>            {
>            array1[h] = (double *) malloc(WIDTH*sizeof(double));
>
>
>                   fscanf(fpr, "%lf",  &array1 [h][w]);
>
>                     fclose(fpr);
>
>            }
>
>
>
>            fnum ++;
>     }
>
>
>         return 0;
> }
>
>
> ////////////////
>
> Thank you,
> Sam
>
>
> _______________________________________________
> Cplusplus-sig mailing list
> Cplusplus-sig at python.org
> https://mail.python.org/mailman/listinfo/cplusplus-sig