Nabble - Boost - Users

Re: [shared_ptr] hangs on iPhone

2009-11-26T14:25:08Z

Igor R wrote:
>> the inlined code is trying to lock a spinlock that doesn't exist.
>
> ...which should cause a crash, shouldn't it?

It picks a memory location, thinking that it's a spinlock locked by another
thread, and waits for it to become "unlocked", which never happens. I guess.

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Re: Automating Serialization?

2009-11-26T14:03:12Z

Am Thursday 26 November 2009 14:05:18 schrieb Bilokon, Paul:

> Hi,
>
> By design Boost Serialization requires the user to list each field that
> needs to be serialised.
>
> This is in contrast, for example, with Java and some other languages where
> serialisation is supported (kind of) at the language level.
>
> The current approach requires some code duplication. We have to declare a
> field. We have to manually (de)serialise it. If we need to make a change,
> we make it in at least two distinct places.
>
> Is there any way to automate the process of serialisation, perhaps
> harnessing the power of the preprocessor? E.g. we could label the fields
> that need to be serialised. Is there anything in Boost that could help?

not that I'm aware of, but I even think that's a good thing.
the serialize() function represents a file format, and you want file formats
to be stable and not being changed because someone added a runtime field to a
class.
usually when you do want to add a serialized field you'd also want old
versions of the file still to be readable, so you end up writing custom
(versioned) deserialization code anyway, even if your language has built-in
serialization support.

you could use some compile time code generator to write default serialization
code for you, using e.g. OpenC++, GCC-XML, or Doxygen, but I doubt those
generated functions would stay there very long.
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Re: Query regarding compiling BOOST parallel graph library

2009-11-26T13:20:26Z

I did a guess work of including --with-system along with other --with-XXX while installing and this proved correct. Thanks for all for helping me. So finally if we have to install boost graph parallel library we need to use the following command

bjam --with-mpi --with-graph_parallel --with-system --prefix=Installdir install

Thanks,
Praga.

On Thu, Nov 26, 2009 at 12:01 PM, praga <mail2praga@...> wrote:

I am able to see the graph_parallel library in that directory but not the system library. I have attached the log file with this email. I am not sure what is the problem with system library. I tried to compile like following

[pragatheeswaran@prairiefire ~]$ mpic++ -I /tmp/boost/include adjlist_build_test.cpp -L /tmp/boost/lib/ -lboost_mpi -lboost_serialization -lboost_graph_parallel
/tmp/ccqgYccw.o: In function `__static_initialization_and_destruction_0(int, int)':

adjlist_build_test.cpp:(.text+0xa22): undefined reference to `boost::system::get_system_category()'
adjlist_build_test.cpp:(.text+0xa2e): undefined reference to `boost::system::get_generic_category()'

adjlist_build_test.cpp:(.text+0xa3a): undefined reference to `boost::system::get_generic_category()'
adjlist_build_test.cpp:(.text+0xa46): undefined reference to `boost::system::get_generic_category()'

adjlist_build_test.cpp:(.text+0xa52): undefined reference to `boost::system::get_system_category()'
collect2: ld returned 1 exit status
[pragatheeswaran@prairiefire ~]$ mpic++ -I /tmp/boost/include adjlist_build_test.cpp -L /tmp/boost/lib/ -lboost_mpi -lboost_serialization -lboost_graph_parallel -lboost_system

/usr/bin/ld: cannot find -lboost_system
collect2: ld returned 1 exit status
[pragatheeswaran@prairiefire ~]$

Thanks,
Praga.

On Thu, Nov 26, 2009 at 11:31 AM, Vladimir Prus <vladimir@...> wrote:

Vladimir Prus wrote:

> Vladimir Prus wrote:
>
>> praga wrote:
>>
>>> Thanks for reply.
>>> Actually the problem is I dont have any other libraries in the installed
>>> path other than
>>> libboost_mpi and libboost_serialization.
>>
>> It would be better if you explicitly say so, rather then omitting those
>> libraries and reporting the expected linker errors you get.
>>
>>> So whenever I try to include
>>> libraries such as libboost_system or libboost_graph_parallel I am getting
>>> errors that those libraries are not found.
>>>
>>> I compiled the BOOST using bjam --with-mpi --with-graph_parallel and
>>> installed using command bjam --with-mpi --with-graph_parallel install
>>> --prefix=~/bin/boostpath
>>>
>>> I remember seeing the parallel graph libraries while installing in the
>>> command line but I am not sure why they are not there in the installed
>>> path.
>>
>> Could you please run the following command in the root of your Boost source
>> tree:
>>
>> bjam --with-mpi --with-graph_parallel --prefix=/tmp/boost install > log 2>&1
>>
>> and then run this command:
>>
>> ls /tmp/boost > log
>
> Correction: this should be:
>
> ls /tmp/boost >> log

Correction 2: this should be

ls /tmp/boost/lib >> log

- Volodya

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Re: [shared_ptr] hangs on iPhone

2009-11-26T13:01:25Z

> the inlined code is trying to lock a spinlock that doesn't exist.

...which should cause a crash, shouldn't it?
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Re: [GIL] How to read fixed point channel ?

2009-11-26T12:33:48Z

Eloi,

maybe you have to create new channel type which represents a fixed
point value. A good starting point might be scoped_channel_value in
channel.hpp. I'm thinking something like this:

template< typename BaseChannelValue >
class fixed_point
{
typedef fixed_point value_type;
typedef value_type& reference;
typedef value_type* pointer;
typedef const value_type& const_reference;
typedef const value_type* const_pointer;

BOOST_STATIC_CONSTANT(bool,
is_mutable=channel_traits<BaseChannelValue>::is_mutable);

static value_type min_value() { return ; }
static value_type max_value() { return ; }

fixed_point() {}
fixed_point(const fixed_point& c) : _value(c._value) {}
fixed_point(BaseChannelValue val) : _value(val) {}

fixed_point& operator++() { /*todo*/; return *this; }
fixed_point& operator--() { /*todo*/; return *this; }

fixed_point operator++(int) { fixed_point tmp=*this;
this->operator++(); return tmp; }
fixed_point operator--(int) { fixed_point tmp=*this;
this->operator--(); return tmp; }

template <typename Scalar2> fixed_point& operator+=(Scalar2 v) {
/*todo*/; return *this; }
template <typename Scalar2> fixed_point& operator-=(Scalar2 v) {
/*todo*/; return *this; }
template <typename Scalar2> fixed_point& operator*=(Scalar2 v) {
/*todo*/; return *this; }
template <typename Scalar2> fixed_point& operator/=(Scalar2 v) {
/*todo*/; return *this; }

fixed_point& operator=(BaseChannelValue v) { _value=v; return *this; }
operator BaseChannelValue() const { return _value; }

private:

BaseChannelValue _value;
};

Does that goes in your direction?

Regards,
Christian

On Thu, Nov 26, 2009 at 5:24 AM, Eloi Du Bois <eloi.du.bois@...> wrote:

> Hi,
>
> I have a stream with 8.8 (16b) channels encoded with fixed point arithmetics
> (http://knol.google.com/k/anonymous/fixed-point-arithmetic/1b19ktdbl6g9q/2#)
> and I need to create a rgb16 view that can hold my image... I tried with
> interleaved_view but this makes wrong values. I don't know how to manage
> with this...
> How must be encoded the shorts in a rgb16_image_t ?
>
> If anyone could help me, that would be great.
>
> Thanks,
> Eloi.
>
> _______________________________________________
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> Boost-users@...
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>

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Re: [shared_ptr] hangs on iPhone

2009-11-26T12:04:04Z

Igor R wrote:
> Thanks a lot for your answer, you pointed me in the direction I didn't
> think of: __thumb__! Actually, my project was compiled with Thumb
> switched on - which is default in XCode. On the other hand, boost
> libraries was built with their default compiler switches for this
> platform, as defined in boost.build/bjam configuration (probably,
> thumb off?).
> Anyway, now I switched off Thumb in my project settings, and
> everything began to move as expected!

Thanks for tracking this down.

>> Is your application multithreaded, or does even a simple uncontended
>> use of boost::detail::spinlock or boost::detail::spinlock_pool fail?
>
> My application is multithreaded, but spinlock_pool was hanging in
> absolutely "uncontended" places - like in regex, which I use in 1
> thread only.
>
> I still don't understand why it behaved like this - afterall, if
> thumb-enabled code doesn't support such a spinlock, it should crash,
> and if it does support, it should work...

The ARM-specific implementation is only used when __thumb__ is not defined:

#if defined(__GNUC__) && defined( __arm__ ) && !defined( __thumb__ )
# include <boost/smart_ptr/detail/spinlock_gcc_arm.hpp>

because Thumb doesn't support the swp instruction and spinlock_gcc_arm
doesn't compile. This causes an ABI mismatch when Thumb and non-Thumb files
are linked together; the inlined code is trying to lock a spinlock that
doesn't exist.

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downloading files with boost.asio

2009-11-26T11:27:13Z

Hi:

I am needing to use boost.asio for a project.

How would I go about downloading binary files (.zip) in this case using the asio library?

Any help appreciated, and Ideally I need to do this asynchronously.

Regards

Sean.

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Re: Boost-users] Automating Serialization?

2009-11-26T11:00:02Z

Paul Bilokon writes:

>Hi,
>
>By design Boost Serialization requires the user to list each field that needs to be serialised.
>
>This is in contrast, for example, with Java and some other languages where serialisation is supported (kind of) at the language >level.
>
>The current approach requires some code duplication. We have to declare a field. We have to manually (de)serialise it. If we >need to make a change, we make it in at least two distinct places.
>
>Is there any way to automate the process of serialisation, perhaps harnessing the power of the preprocessor? E.g. we could >label the fields that need to be serialised. Is there anything in Boost that could help?

The C++ Middleware Writer doesn't have that problem --
http://webEbenezer.net/comparison.html . (There's a performance section
on that page using Boost 1.38. We're in the process of updating that page
using Boost 1.41 and hope to have those results on line in the next two weeks.)

Regards,
Brian Wood
http://www.webEbenezer.net

"Then Samuel took a stone, and set it between Mizpeh and Shen,
and called the name of it Ebenezer, saying, so far the the L-rd has
helped us."

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Re: [shared_ptr] hangs on iPhone

2009-11-26T10:50:07Z

Thanks a lot for your answer, you pointed me in the direction I didn't
think of: __thumb__! Actually, my project was compiled with Thumb
switched on - which is default in XCode. On the other hand, boost
libraries was built with their default compiler switches for this
platform, as defined in boost.build/bjam configuration (probably,
thumb off?).
Anyway, now I switched off Thumb in my project settings, and
everything began to move as expected!

> Is your application multithreaded, or does even a simple uncontended use of boost::detail::spinlock or boost::detail::spinlock_pool fail?

My application is multithreaded, but spinlock_pool was hanging in
absolutely "uncontended" places - like in regex, which I use in 1
thread only.

I still don't understand why it behaved like this - afterall, if
thumb-enabled code doesn't support such a spinlock, it should crash,
and if it does support, it should work... But this's really less
important than the practical aspect, for the moment :) .
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Re: finite state machine performance info

2009-11-26T10:29:21Z

Also note that a lot of performance on ia32 can depend on cache
thrashing. You want to maintain memory locality otherwise you may get
confusing results. If you are using the wall clock for timing, keep an
eye on your disk light to as VM is not impossible without some care
but the cache may not be as appreciated.
This means parameter and data changes that cause flow or "small"
buffer size changes can make important differences in speed unrelated
to raw instruction or access count etc.

On 11/26/09, Eric J. Holtman <eric@...> wrote:

> Conoscenza Silente wrote:
>>
>> I hope to not have offended anyone with this small test / evaluation.
>
> I'm not offended, just genuinely curious.
>
> I'll admit it's possible to have an app that
> does spend a ton of time transitioning. I'm
> just not sure that's the case here.
>
>
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>

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Re: Phoenix question

2009-11-26T09:51:12Z

Can you provide the full code, including the #includes, and say which version of
Boost you're using, and which compiler.

- Rob.

Hello the complete code is given below. I'm using Boost 1.41.0 on VC9 and VC8.

=============================================================================

#include <iostream>

#include <vector>

#include <string>

#include <algorithm>

using std::cout ;

using std::endl ;

#include <boost/algorithm/string/trim.hpp>

#include <boost/spirit/include/phoenix.hpp>

namespace phx = boost::phoenix ;

namespace pha = phx::arg_names ;

namespace str_algo = boost::algorithm ;

void trim(std::string& s)

{

str_algo::trim(s) ;

}

int main (void)

{

std::vector<std::string> vs ;

vs.push_back (" String1 ") ;

vs.push_back (" String2 ") ;

vs.push_back (" String3 ") ;

phx::for_each (pha::arg1, phx::lambda[ cout << pha::arg1 << '\n' ])(vs) ;

cout << "===================================" << endl ;

// What I'm trying to do is call boost::algorithm::trim on all elements of vector.

// the below given statement works without any problem.

std::for_each (vs.begin(), vs.end(), phx::bind(&trim, pha::arg1));

//How do I call boost::algorithm::trim directly using Boost.Phoenix or Boost.Lambda. Below

//I'm trying to do it using phoenix.

//std::for_each (vs.begin(), vs.end(), phx::bind(&str_algo::template trim, pha::_1));

phx::for_each (pha::arg1, phx::lambda[ cout << pha::arg1 << '\n' ])(vs) ;

cout << "===================================" << endl ;

}

===============================================================================

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Re: Query regarding compiling BOOST parallel graph library

2009-11-26T09:31:46Z

Vladimir Prus wrote:

> Vladimir Prus wrote:
>
>> praga wrote:
>>
>>> Thanks for reply.
>>> Actually the problem is I dont have any other libraries in the installed
>>> path other than
>>> libboost_mpi and libboost_serialization.
>>
>> It would be better if you explicitly say so, rather then omitting those
>> libraries and reporting the expected linker errors you get.
>>
>>> So whenever I try to include
>>> libraries such as libboost_system or libboost_graph_parallel I am getting
>>> errors that those libraries are not found.
>>>
>>> I compiled the BOOST using bjam --with-mpi --with-graph_parallel and
>>> installed using command bjam --with-mpi --with-graph_parallel install
>>> --prefix=~/bin/boostpath
>>>
>>> I remember seeing the parallel graph libraries while installing in the
>>> command line but I am not sure why they are not there in the installed
>>> path.
>>
>> Could you please run the following command in the root of your Boost source
>> tree:
>>
>> bjam --with-mpi --with-graph_parallel --prefix=/tmp/boost install > log 2>&1
>>
>> and then run this command:
>>
>> ls /tmp/boost > log
>
> Correction: this should be:
>
> ls /tmp/boost >> log

Correction 2: this should be

ls /tmp/boost/lib >> log

- Volodya

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Re: Query regarding compiling BOOST parallel graph library

2009-11-26T09:30:38Z

Vladimir Prus wrote:

> praga wrote:
>
>> Thanks for reply.
>> Actually the problem is I dont have any other libraries in the installed
>> path other than
>> libboost_mpi and libboost_serialization.
>
> It would be better if you explicitly say so, rather then omitting those
> libraries and reporting the expected linker errors you get.
>
>> So whenever I try to include
>> libraries such as libboost_system or libboost_graph_parallel I am getting
>> errors that those libraries are not found.
>>
>> I compiled the BOOST using bjam --with-mpi --with-graph_parallel and
>> installed using command bjam --with-mpi --with-graph_parallel install
>> --prefix=~/bin/boostpath
>>
>> I remember seeing the parallel graph libraries while installing in the
>> command line but I am not sure why they are not there in the installed
>> path.
>
> Could you please run the following command in the root of your Boost source
> tree:
>
> bjam --with-mpi --with-graph_parallel --prefix=/tmp/boost install > log 2>&1
>
> and then run this command:
>
> ls /tmp/boost > log

Correction: this should be:

ls /tmp/boost >> log

- Volodya

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Re: Query regarding compiling BOOST parallel graph library

2009-11-26T09:21:09Z

praga wrote:

> Thanks for reply.
> Actually the problem is I dont have any other libraries in the installed
> path other than
> libboost_mpi and libboost_serialization.

It would be better if you explicitly say so, rather then omitting those
libraries and reporting the expected linker errors you get.

> So whenever I try to include
> libraries such as libboost_system or libboost_graph_parallel I am getting
> errors that those libraries are not found.
>
> I compiled the BOOST using bjam --with-mpi --with-graph_parallel and
> installed using command bjam --with-mpi --with-graph_parallel install
> --prefix=~/bin/boostpath
>
> I remember seeing the parallel graph libraries while installing in the
> command line but I am not sure why they are not there in the installed
> path.

Could you please run the following command in the root of your Boost source
tree:

bjam --with-mpi --with-graph_parallel --prefix=/tmp/boost install > log 2>&1

and then run this command:

ls /tmp/boost > log

and then archive and post the 'log' file? Please run the commands exactly as written --
in fact, just copy paste them in your terminal.

- Volodya

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Re: Phoenix question

2009-11-26T09:16:20Z

On Thu, Nov 26, 2009 at 7:46 AM, Surya Kiran Gullapalli <suryakiran.gullapalli@...> wrote:

Hello all,
first of all, apologies for cross posting. I've a question in phoenix and I do not know where will it fit in.

the piece of code is located at

http://pastebin.com/f16f5c6a2

What is wrong with line #9 .

Can you provide the full code, including the #includes, and say which version of
Boost you're using, and which compiler.

- Rob.

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Re: Query regarding compiling BOOST parallel graph library

2009-11-26T09:13:06Z

Thanks for reply.

Actually the problem is I dont have any other libraries in the installed path other than

libboost_mpi and libboost_serialization. So whenever I try to include libraries such as libboost_system or libboost_graph_parallel I am getting errors that those libraries are not found.

I compiled the BOOST using bjam --with-mpi --with-graph_parallel and installed using command bjam --with-mpi --with-graph_parallel install --prefix=~/bin/boostpath

I remember seeing the parallel graph libraries while installing in the command line but I am not sure why they are not there in the installed path.

Any suggestions ?

Thanks,
Praga.

On Thu, Nov 26, 2009 at 10:53 AM, Vladimir Prus <vladimir@...> wrote:

praga wrote:

> The MPI program works correctly after setting the LD_LIBRARY_PATH.
> I still have problems with parallel_graph library compilation.
> Any suggestions ?
>
> [pragatheeswaran@prairiefire test]$ mpic++ -I ~/bin/boostpath/include
> adjlist_build_test.cpp -L ~/bin/boostpath/lib/ -lboost_mpi
> -lboost_serialization
> /tmp/ccNyFVXh.o: In function `__static_initialization_and_destruction_0(int,
> int)':
> adjlist_build_test.cpp:(.text+0xa22): undefined reference to
> `boost::system::get_system_category()'

You need to add -lboost_system to the end of your compile command. FWIW,
the following might be of general help when dealing with linker
errors:

http://vladimir_prus.blogspot.com/2009/06/linking-101.html

> adjlist_build_test.cpp:(.text+0x2076): undefined reference to
> `boost::graph::distributed::communicator(boost::graph::distributed::mpi_process_group
> const&)'

Hopefully, given the above suggestions and the URL, you will be able to figure
what do do about this linker error, too.

- Volodya

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Boost.Serialization not building 3

2009-11-26T09:04:09Z

I could track it down to the differnce of the nested
shared_ptr_helper::non_polymorphic struct versus
shared_ptr_helper::polymorphic struct within boost::archive::detail namespace.
This non_polymorphic struct uses the singleton and returns the shared_ptr
wrapped type (thru the 'get_const_instance()' function), while the polymorphic
variant adds an extra call to get the extended type info.

So my guess is that it will never work, but ofc who am I to judge :)

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Re: [shared_ptr] hangs on iPhone

2009-11-26T08:55:38Z

Igor R wrote:

> Hello,
>
> My application works on iphone simulator, but hangs when running on
> iphone itself. Pausing it and looking at the stack trace shows the
> picture very similar to the one desribed here:
> http://article.gmane.org/gmane.comp.lib.boost.user/47644
> I.e., the call stack origins from different place each time, but ends
> up with an attempt to addref shared_ptr and spinning in the spinlock.
> I could try and use XCode "native" tr1::shared_ptr version, but
> boost::shared_ptr is used by many other boost libraries, so it
> wouldn't help.
> So my question is if there's any fix/workaround/compiler-switch that I
> can apply to overcome this issue and avoid re-writing the whole
> project without boost?

You might try to comment out the lines

#if defined(__GNUC__) && defined( __arm__ ) && !defined( __thumb__ )
# include <boost/smart_ptr/detail/spinlock_gcc_arm.hpp>

in smart_ptr/detail/spinlock.hpp and see if that helps... although it might
be better to investigate why the ARM spinlock doesn't work on the iPhone. Is
your application multithreaded, or does even a simple uncontended use of
boost::detail::spinlock or boost::detail::spinlock_pool fail? (Their tests
can be found in libs/smart_ptr/test.)

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Re: Query regarding compiling BOOST parallel graph library

2009-11-26T08:53:42Z

praga wrote:

> The MPI program works correctly after setting the LD_LIBRARY_PATH.
> I still have problems with parallel_graph library compilation.
> Any suggestions ?
>
> [pragatheeswaran@prairiefire test]$ mpic++ -I ~/bin/boostpath/include
> adjlist_build_test.cpp -L ~/bin/boostpath/lib/ -lboost_mpi
> -lboost_serialization
> /tmp/ccNyFVXh.o: In function `__static_initialization_and_destruction_0(int,
> int)':
> adjlist_build_test.cpp:(.text+0xa22): undefined reference to
> `boost::system::get_system_category()'

You need to add -lboost_system to the end of your compile command. FWIW,
the following might be of general help when dealing with linker
errors:

http://vladimir_prus.blogspot.com/2009/06/linking-101.html

> adjlist_build_test.cpp:(.text+0x2076): undefined reference to
> `boost::graph::distributed::communicator(boost::graph::distributed::mpi_process_group
> const&)'

Hopefully, given the above suggestions and the URL, you will be able to figure
what do do about this linker error, too.

- Volodya

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Re: finite state machine performance info

2009-11-26T08:45:49Z

Conoscenza Silente wrote:
>
> I hope to not have offended anyone with this small test / evaluation.

I'm not offended, just genuinely curious.

I'll admit it's possible to have an app that
does spend a ton of time transitioning. I'm
just not sure that's the case here.

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Re: finite state machine performance info

2009-11-26T08:43:16Z

It is a good point.
I cannot say it right now that's why I did the dummy application.
It was just to have a rough idea abouut speed and fasteness in general.
Next time I will start with some data taken from it directly.
I hope to not have offended anyone with this small test / evaluation.

On Thu, Nov 26, 2009 at 5:23 PM, Eric J. Holtman <eric@...> wrote:

Conoscenza Silente wrote:

Whell I did a small test application to test the usage of boost::pool_allocator and boost::fast_pool_allocator. My application will possibly do a lot of transition from a state to another.

You didn't answer my question. If your application
only spends 10% of its time actually transitioning
states, then it doesn't really matter if you can
speed that up by a factor of 2 or 10.

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[shared_ptr] hangs on iPhone

2009-11-26T08:39:33Z

Hello,

My application works on iphone simulator, but hangs when running on
iphone itself. Pausing it and looking at the stack trace shows the
picture very similar to the one desribed here:
http://article.gmane.org/gmane.comp.lib.boost.user/47644
I.e., the call stack origins from different place each time, but ends
up with an attempt to addref shared_ptr and spinning in the spinlock.
I could try and use XCode "native" tr1::shared_ptr version, but
boost::shared_ptr is used by many other boost libraries, so it
wouldn't help.
So my question is if there's any fix/workaround/compiler-switch that I
can apply to overcome this issue and avoid re-writing the whole
project without boost?

Thanks!
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Re: finite state machine performance info

2009-11-26T08:23:36Z

Conoscenza Silente wrote:
> Whell I did a small test application to test the usage of
> boost::pool_allocator and boost::fast_pool_allocator. My application
> will possibly do a lot of transition from a state to another.
>

You didn't answer my question. If your application
only spends 10% of its time actually transitioning
states, then it doesn't really matter if you can
speed that up by a factor of 2 or 10.

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Re: finite state machine performance info

2009-11-26T08:18:37Z

Whell I did a small test application to test the usage of boost::pool_allocator and boost::fast_pool_allocator. My application will possibly do a lot of transition from a state to another.
I found that it is better to use state chart classes without allocator.
In the code below tese are the results:

Without allocator 5.7 sec
with boost::pool_allocator 10.7 sec
with boost::fast_pool_allocator 8.7 sec

Next action could be

test with another allocator
try the asynchronous version

Any suggestion?

#include <boost/statechart/simple_state.hpp>
#include <boost/statechart/state_machine.hpp>
#include <boost/statechart/event.hpp>
#include <boost/statechart/transition.hpp>
#include <boost/timer.hpp>
#include <boost/progress.hpp>
#include <boost/pool/pool_alloc.hpp>

using namespace boost::statechart;

struct state_1;
struct state_2;
struct state_3;
struct state_4;

struct main_machine :
state_machine<
main_machine,
state_1

// without allocator I have 5.6 seconds (used also in events)

//,boost::pool_allocator< main_machine > // with this
// allocator I go to 10 sec used also in events

//,boost::fast_pool_allocator< main_machine > // with this
//allocator I go to 8.7 sec

> {};

struct event_1_2 : event< event_1_2
//, boost::fast_pool_allocator< event_1_2 >
>{};
struct event_2_3 : event< event_2_3
//, boost::fast_pool_allocator< event_2_3 >
>{};
struct event_3_4 : event< event_3_4
//, boost::fast_pool_allocator< event_3_4 >
>{};
struct event_4_1 : event< event_4_1
//, boost::fast_pool_allocator< event_4_1 >
>{};

struct state_1
: simple_state< state_1, main_machine >
{
typedef transition< event_1_2, state_2 > reactions;
};

struct state_2
: simple_state< state_2, main_machine >
{
typedef transition< event_2_3, state_3 > reactions;
};

struct state_3
: simple_state< state_3, main_machine >
{
//typedef transition< event_3_4, state_4 > arc; // it doesn't work
typedef transition< event_3_4, state_4 > reactions;

//state_3(){std::cout<<"3";}
//~state_3(){std::cout<<"~3";}
};

struct state_4
: simple_state< state_4, main_machine >
{
typedef transition< event_4_1, state_1 > reactions;
   };

void main(){
main_machine fsm;
fsm.initiate();
{
boost::progress_timer t; // count the time elapsed
// before distruction: not very precise
// for expected big differences

for( int i = 0; i < 1000000; i ++ ){

fsm.process_event( event_1_2() );
fsm.process_event( event_2_3() );
fsm.process_event( event_3_4() );
fsm.process_event( event_4_1() );
}
   }
}

On Thu, Nov 26, 2009 at 4:57 PM, Eric J. Holtman <eric@...> wrote:
> Conoscenza Silente wrote:
>>
>> I would like to fasten up the whole process; let's say that I would
>> like to avoid the creation/destruction of the class each time using
>> object already allocated in memory that are deleted only at the exit
>> of the application.
>> Is this a good way in your opinion ?
>>
>>
>
> So when you profile your entire application, how much
> time is being spent in boost's state library?
> _______________________________________________
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> Boost-users@...
> http://lists.boost.org/mailman/listinfo.cgi/boost-users
>

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Re: Query regarding compiling BOOST parallel graph library

2009-11-26T08:12:39Z

The MPI program works correctly after setting the LD_LIBRARY_PATH.

I still have problems with parallel_graph library compilation.

Any suggestions ?

[pragatheeswaran@prairiefire test]$ mpic++ -I ~/bin/boostpath/include adjlist_build_test.cpp -L ~/bin/boostpath/lib/ -lboost_mpi -lboost_serialization

/tmp/ccNyFVXh.o: In function `__static_initialization_and_destruction_0(int, int)':

adjlist_build_test.cpp:(.text+0xa22): undefined reference to `boost::system::get_system_category()'

adjlist_build_test.cpp:(.text+0xa2e): undefined reference to `boost::system::get_generic_category()'

adjlist_build_test.cpp:(.text+0xa3a): undefined reference to `boost::system::get_generic_category()'

adjlist_build_test.cpp:(.text+0xa46): undefined reference to `boost::system::get_generic_category()'

adjlist_build_test.cpp:(.text+0xa52): undefined reference to `boost::system::get_system_category()'

/tmp/ccNyFVXh.o: In function `test_main(int, char**)':

adjlist_build_test.cpp:(.text+0x1966): undefined reference to `boost::graph::distributed::mpi_process_group::mpi_process_group(boost::mpi::communicator)'

adjlist_build_test.cpp:(.text+0x2076): undefined reference to `boost::graph::distributed::communicator(boost::graph::distributed::mpi_process_group const&)'

adjlist_build_test.cpp:(.text+0x217b): undefined reference to `boost::graph::distributed::communicator(boost::graph::distributed::mpi_process_group const&)'

adjlist_build_test.cpp:(.text+0x2483): undefined reference to `boost::graph::distributed::communicator(boost::graph::distributed::mpi_process_group const&)'

adjlist_build_test.cpp:(.text+0x2690): undefined reference to `boost::graph::distributed::communicator(boost::graph::distributed::mpi_process_group const&)'

adjlist_build_test.cpp:(.text+0x2d8e): undefined reference to `boost::graph::distributed::communicator(boost::graph::distributed::mpi_process_group const&)'

/tmp/ccNyFVXh.o:adjlist_build_test.cpp:(.text+0x2e93): more undefined references to `boost::graph::distributed::communicator(boost::graph::distributed::mpi_process_group const&)' follow

/tmp/ccNyFVXh.o: In function `test_main(int, char**)':

adjlist_build_test.cpp:(.text+0x34cc): undefined reference to `boost::graph::distributed::mpi_process_group::~mpi_process_group()'

adjlist_build_test.cpp:(.text+0x34e8): undefined reference to `boost::graph::distributed::mpi_process_group::~mpi_process_group()'

Thanks,
Praga.

On Thu, Nov 26, 2009 at 1:11 AM, Raymond Wan <r.wan@...> wrote:

Hi praga,

praga wrote:

I guess you are right.. I have some problems with some basic boost mpi
stuffs itself..

Have you set your $LD_LIBRARY_PATH environment variable? I haven't installed 1.41, but for v1.40, I added /usr/local/boost_1_40_0/lib to the search path.

As for an earlier e-mail of your's, in terms of boost installation, one thing that I did which was different was that I added "using mpi ;" to the end of my project-config.jam file before running bjam. I don't know if it is necessary; it's something I did for an older version of boost a while back and haven't bothered to check if it's still needed...

Ray

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Re: finite state machine performance info

2009-11-26T07:57:03Z

Conoscenza Silente wrote:
> I would like to fasten up the whole process; let's say that I would
> like to avoid the creation/destruction of the class each time using
> object already allocated in memory that are deleted only at the exit
> of the application.
> Is this a good way in your opinion ?
>
>

So when you profile your entire application, how much
time is being spent in boost's state library?
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[Statechart] How to model this scenario?

2009-11-26T07:28:08Z

Suppose I have a character in a game. He can run, and do two types of attacks. He can initiate either an attack first or a jump first, and then initiate the other second and it will perform both at the same time until one finishes, then go back to just one until that one is also finished, and finally go back to just running on the ground. Additionally, he can be knocked back either on the ground or while already in the air. The system has the following properties:

- If he is attacking (regardless of whether it be on the ground or in the air), he cannot initiate another attack until the first one is done.   Otherwise he can always initiate an attack (even in the air).
- If he is jumping, he cannot jump again until the first jump is finished.
- Regardless of whether he is jumping or on the ground, he can initiate attack 1, initiate attack 2, or jump. All of this is only possible if he is not currently being knocked back.
- There are separate animations for:
      jumping
      attack 1 while on the ground
      attack 2 while on the ground
      attack 1 while jumping
      attack 2 while jumping
      knockback

If being knocked back, the knockback animation takes priority over whatever other animation was being played at the time. After the knockback is complete, it will continue from the previous animation, assuming that state has not finished.

I feel like I should use some type of concurrent states here, but I'm not sure how to model the combinatorial factor (i.e. playing different animations depending on the *combination* of states). I'm also not sure how to model the priority of the knockback animation. In fact, this is not just related to the Statechart library, but I'm unclear how to do this using UML State Machines as well.

Any advice appreciated.
Zach

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Re: msvc fail to link with dynamic boost_program_options library

2009-11-26T07:12:48Z

Hi all,

In case anyone is still interested... With the release of Boost 1.41 I
looked into this problem again and found out it was my own mistake.
When linking to a DLL of boost_program_options (in my case without
autolinking), I got two unresolved symbols to the following "global"
variables:
boost::options_description::m_default_line_length and
boost::program_options::arg

The problem was in my CMakeLists.txt file, where I assumed that
setting Boost_USE_STATIC_LIBS to Off would be sufficient. In that case
BOOST_ALL_DYN_LINK is not defined. As a consequence the definition of
BOOST_PROGRAM_OPTIONS_DECL was empty when importing the library, hence
no __declspec( dllimport ) and correspondingly a linker-error.

I don't know if this is the solution for the others, but by explicitly
defining BOOST_ALL_DYN_LINK (or BOOST_PROGRAM_OPTIONS_DYN_LINK) I can
now link my apps to a boost_program_options dll.

Regards,
André

On Wed, Oct 14, 2009 at 2:44 PM, Vladimir Prus
<vladimir@...> wrote:

> André Prins wrote:
>
>> Hi all,
>>
>> I am having exactly the same problems when trying to link my main-app
>> to a DLL-version of Boost::program_options. (using MSVC 9 and Boost
>> 1.40).
>>
>>> main.obj : error LNK2001: unresolved external symbol "public: static
>>> unsigned int const
>>> boost::program_options::options_description::m_default_line_length"
>>> (?m_default_line_length@options_description@program_options@boost@@2IB)
>>
>> For the first unresolved external, to the
>> options_description::m_default_line_length, there is a workaround, by
>> explicitly specifying a line-length as the second argument when
>> constructing your descriptions. E.g.
>>
>> po::options_description descriptions( "All options", 80 ); // Note
>> the extra argument 80
>>
>>> main.obj : error LNK2001: unresolved external symbol "class
>>> std::basic_string<char,struct std::char_traits<char>,class
>>> std::allocator<char> > boost::program_options::arg"
>>> (?arg@program_options@boost@@3V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@A)
>>
>> For the second unresolved external, I could not find a solution and I
>> decided to build a static version of Boost::program_options. This
>> solved both of these two problems.
>
> It would be nice if somebody figure what this problem is and explain this to me. Or
> provide a patch ;-)
>
> - Volodya
>
>
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XL C/C++ 8.0

2009-11-26T06:54:28Z

Hi boost users,

Does anyone successfully compiled boost 1.40 or 1.41 with XL C/C++ 8.0 ?

If yes did you modified the sources because it does not compile out of
the box on my system.

--
Florent,

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smime.p7s (6K) Download Attachment

Re: Removing LEDA adaptors from Boost.Graph

2009-11-26T06:32:52Z

Are there any users who are using the LEDA interfaces to Boost.Graph? There are several tickets filed against them but the tickets are all years old. Is it safe to remove them? Do they need a deprecation period first?

Hi Jeremiah,
I would be using LEDA adapters. I can help starting January to maintain it. But I doubt apart from me if anyone else would be using it.

Maybe we can move them into boost/graph/3rdparty and put a note in the docs that they may be unmaintained?

Andrew Sutton
andrew.n.sutton@...

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Automating Serialization?

2009-11-26T05:05:18Z

Hi,

By design Boost Serialization requires the user to list each field that needs to be serialised.

This is in contrast, for example, with Java and some other languages where serialisation is supported (kind of) at the language level.

The current approach requires some code duplication. We have to declare a field. We have to manually (de)serialise it. If we need to make a change, we make it in at least two distinct places.

Is there any way to automate the process of serialisation, perhaps harnessing the power of the preprocessor? E.g. we could label the fields that need to be serialised. Is there anything in Boost that could help?

Many thanks,

Paul

Paul Bilokon, Vice President
Citigroup | FX - Options Trading | Quants

33 Canada Square | Canary Wharf | Floor 3
London, E14 5LB
Phone: +44 20 798-62191

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Re: Boost.Serialization not building

2009-11-26T04:55:33Z

It is even not compiling with base struct Foo alone. I probably miss the
crucial point somewhere. The documentation is really hard to follow.

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Mac OSX - gcc crash

2009-11-26T04:40:50Z

Hello,

My question is not focused, but maybe someone had similar experience
and could share his conslucions.
I'm porting to iPhone (SDK 3.1.2, XCode3.2.1) rather big static
library that uses boost very extensively. It compiles and works well
under the simulator both in debug and in release modes. But when I try
to compile it for the device, gcc4.2 crashes ("exists with code 1"). I
found-out that if I do not generate debug symbols, the compilation
succeeds. However, then I can't debug the application on iPhone - it
doesn't stop on breakpoints and I can't step through the code (if the
application would work on the device like it works on simulator,
debugging wouldn't be an issue, but it doens't work for some reason).
Again, I even don't know *where* the compiler crashes and whether it's
related to boost headers or not, but any idea/experience would be
greatly appreciated.

Thanks.
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Boost.Serialization not building

2009-11-26T04:30:20Z

Dear all,

we just upgrade to Boost 1.41 and get a compile error in Boost.Serialization:

1>c:\work sdk\boost_1_41_0\boost/archive/shared_ptr_helper.hpp(114) : error
C2440: 'return' : cannot convert from 'const
boost::serialization::extended_type_info_typeid<T>' to 'const
boost::serialization::extended_type_info *'

There was already a discussion about this on the newsgroup but no solution was
posted: http://thread.gmane.org/gmane.comp.lib.boost.user/52384/focus=52390

The case is easy reproducable:

struct Foo
{
//virtual ~Foo(){}
};

struct Foo2 : public Foo
{
template <class Archive>
void serialize(Archive& /*ar*/, const unsigned int /*version*/)
{
}
};

struct Bla
{
template <class Archive>
void serialize(Archive& ar, const unsigned int /*version*/)
{
ar & BOOST_SERIALIZATION_NVP(m_ptrFoo2);
}

boost::shared_ptr<Foo2> m_ptrFoo2;
};

void F()
{
std::stringstream sstr;
Bla bla;

boost::archive::xml_iarchive ia(sstr);

ia >> boost::serialization::make_nvp("bla", bla);
}

Can somebody help? Adding a virtual dtor does remove the problem (and is
exactly the difference with 'test_shared_ptr.cpp') but this is unwanted.

wkr

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Re: gcc problems on mac os 10.6...

2009-11-26T04:14:38Z

Hi,

I am on Snow Leopard, and Boost.Python builds for me fine (even the
fat 3-way binary). It seems that you have a custom Python installed in
/Library/Frameworks/Python.framework, and the build process prefers
this one instead of the "system"
/System/Library/Frameworks/Python.framework. When I installed the
custom 2.5 one from python.org, I had the same error, because the
build process picked up this custom install of Python. I uninstalled
it, and the build picked up the system python, which worked well.

I am not sure why the python from python.org does not work, if it's
something that's fixed in later releases (2.6, 3.0, 3.1), or not. But
building against system python works (Snow Leopard contains versions
2.3, 2.5 and 2.6, for Tiger, Leopard, and Snow Leopard compatibility
respectively, with 2.6 being the default). How to specify which Python
you want to build against is specified in [1] (not used myself, but
seems it's what will help you).

HTH,
Boris

[1]: http://www.boost.org/doc/libs/1_41_0/libs/python/doc/building.html#python-configuration-parameters

On Wed, Nov 25, 2009 at 5:30 PM, Wong Hua <wong.hua@...> wrote:

> I would like to install the python headers from boost, but after
> successfully (?) building under mac os 1.5, I get this error when trying to
> build boost on mac os 10.6 machines (tried on two machines with the same
> result)
>
> ./bootstrap.sh doesn't have problems
> ./bjam give me all kinds of errors
>
> The kind of errors I get :
>
> ...failed darwin.compile.c++
> bin.v2/libs/python/build/darwin-4.2.1/release/threading-multi/numeric.o...
> darwin.compile.c++
> bin.v2/libs/python/build/darwin-4.2.1/release/threading-multi/list.o
> In file included from
> /Library/Frameworks/Python.framework/Versions/2.5/include/python2.5/Python.h:57,
>                from ./boost/python/detail/wrap_python.hpp:142,
>                from ./boost/python/detail/prefix.hpp:13,
>                from ./boost/python/list.hpp:8,
>                from libs/python/src/list.cpp:5:
> /Library/Frameworks/Python.framework/Versions/2.5/include/python2.5/pyport.h:761:2:
> error: #error "LONG_BIT definition appears wrong for platform (bad gcc/glibc
> config?)."
>
> On the mac os 10.5 machine
> gcc version 4.0.1 (Apple Inc. build 5490)
>
> On the mac os 10.6 machines
> gcc version 4.0.1 (Apple Inc. build 5490)
> gcc version 4.2.1 (Apple Inc. build 5646) (dot 1)
>
> Python is 2.5.4 for all and located in /Library/Frameworks
>
> are there any options I have to use with bootstrap.sh or bjam?
>
>
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