BOOST Archives Google Group

[Boost-users] [thread] "almost works" clarification

2013-05-21T21:58:41Z

Hello,

Okay, so without starting a flame war, because that is not my
intention... Also bear in mind, I am coming from an informed C# .NET
frame of mind having worked with .NET threading, synchronization,
events, and so forth.

I ran across this article, which although a bit dated, is a pretty

[Boost-users] [thread] SEVERE bug on packaged_task constructor in C++11 mode.

2013-05-21T06:24:50Z

Hi,

There is a severe bug in packaged_task constructor when compiling in
C++11 mode and giving a copyable functor as parameter, as reported in
[link]. I believe that this is not
a regression, this have never worked.

Until I find a fix, the packaged_task could be used only with free

[Boost-users] [accumulator] with complex domain model

2013-05-20T18:29:32Z

Hello,

We've got a complex domain model which must be accumulated and
eventually averaged together. I am already overloading the operators
for that model.

We could roll our own with just the operators we'll need to
accommodate, like +, +=, /, etc, but would like to take a gander at
Boost.Accumulator first. Would be much better, obviously, rather than

[Boost-users] endless loop and/or crash in boost::interprocess

2013-05-20T18:28:18Z

How do I debug a potential endless loop and heap corruption issue involving boost::interprocess "new managed_shared_memory" freezing forever or crashing?
I posted this on stackoverflow but I am hopeful that a real expert in Boost::Interprocess may have seen this freeze-up and crash before.
Outside the debugger it manifests as a freeze-up, inside the debugger it manifests as a series of exceptions inside an endless

[Boost-users] [boost][thread] Future's scheduler

2013-05-20T10:12:38Z

I'm using boost.thread V4 in my projects because I would like to use
futures.
I understand that boost 1.53 implementation of future.then() is incomplete
but I think it's ok
for my current use.

However I think there might be something missing.

I'm in a case where the user of my library provide his own task scheduler

[Boost-users] 64 bit or 32 bit?

2013-05-18T03:48:10Z

Hi,

I have a Windows 8 64 bit OS and would like to use Visual Studio Express
2012 for Windows 8. Should I install a 64 bit or 32 bit version of Boost?

Thanks,

Scott

[Boost-users] [asio] schedule work on all threads of a single io_service::run() pool?

2013-05-17T21:32:57Z

Greetings --

Is there a way to ask the io_service to distribute a particular
handler to every thread that is running the service?

My use case is per-thread watchdogs, and I need the worker threads to
ping the watchdog on some regular interval (e.g., every 5 seconds).

I didn't see anything like this in the docs, and I didn't see anything

[Boost-users] [BGL] assert( source(* (out_edges(v, undigraph).first), undigraph) == v )

2013-05-17T13:38:55Z

Hello,

When I have an undirected graph, for edge_descriptor
source and target still are defined.

That is stated here:
[link]

My question. Is

edge_descriptor ed = * out_edges(v,undigraph).first;

Is there a requirement for graph implementations

[Boost-users] [msm] interrupt_state with more then one event that ends interrupt?

2013-05-17T12:07:38Z

Hi,

Subj, Is that possible?
for example, one event continues processing, the another one finishes
the whole state-machine (some clean-up actions etc).

I tried

struct Interrupt : public msmf::interrupt_state< boost::mpl::vector<Foo,
Bar> > {};

and

struct Interrupt : public msmf::interrupt_state< msmf::ActionSequence_<

[Boost-users] which library to use:cleaning up singletons

2013-05-17T04:08:30Z

hello all:
I have a fairly large code base that has a lot of modules and systems.
The problem is that I have a main "engine" object that holds pointers to
a lot of created modules and components. I'm trying to find a more
dynamic way to do this, and I thought boost might be able to help. As a

[Boost-users] [Boost.Atomic] Wait-free multi-producer queue example bug?

2013-05-16T21:20:15Z

Hi,

In
[link]
I see that pop_all_reverse() is implemented as:

node * pop_all_reverse(void)
{
return head_.exchange(0, boost::memory_order_consume);

Shouldn't the memory order be memory_order_acquire in this example? If

[Boost-users] Interprocess : offset_ptr used as array

2013-05-16T11:44:54Z

Hello,

I have an offset_ptr named tmpData defined like this :

offset_ptr<const byte>* someVariable;
indextype index;
...
offset_ptr<const byte> tmpData = ((offset_ptr<const byte>*)someVariable)[index];

data points actually to the beginning of an array.
The original code, without shared memory was :

[Boost-users] [smart_ptr] Migrating from boost::shared_ptr<> to std::shared_ptr<>

2013-05-16T10:12:21Z

Hi,

with recently acquired (semi) C++11 compiler (YEY!) I started to think
which of BOOST functionality could be replaced by standard counterparts.
First obvious candidates are smart pointers.

Thing is, there is lots of functions that take boost::shared_ptr<> as
arguments (or return them) and it is just not easy to do do. My questions:

[Boost-users] [SmartPtr] enable_shared_from_raw / weak_from_raw remains not associated

2013-05-16T09:58:27Z

I'm converting existing code with parent-child object tree to boost
shared_ptr/weak_ptr with parents having [now shared] ownership over the
children and children having weak reference to the parent. In the existing
code a parent usually becomes the children as constructor parameters, and

[Boost-users] PROBLEM WITH BOOST MPI

2013-05-15T19:37:34Z

Hi friends,

I have to run distributed_delta_stepping with graphs in CSR fromat. So I
tried with "distributed_shortest_path_tes t.cpp" located at "<top of boost
source tree>/libs/graph_parallel/test / ". It reads a random graph in
adjacency list format. But I have to run DIMACS_USA graph in CSR format.

[Boost-users] Re: How to Boost static lib build under Mountain Lion and XCODE 4.6

2013-05-15T18:11:42Z

Hi,

I'm trying to install and use Boost 1_53_0 on MAC OS X Mountain Lion and
use it with the latest XCODE 4.6.x. I want to port a small MS VS MFC C++
app. I developed on Windows to MAC.

Specifically I need to install and build boost as static libraries. I'm
completely new to programming on the MAC side of things. I understand that

[Boost-users] [Graph] Problem with large vertex ids

2013-05-15T15:54:10Z

Hi all,

I'm trying to understand/fix some bugs in pgRouting that use the boost
libraries. I know C not not C++, so I can understand most of the more
C-ish parts. We have an old bug that I believe is caused when we add an
edge and it has large vertex ids or when there is a large number between

[Boost-users] Statechart timer extension and new version of visualizer

2013-05-15T06:20:50Z

Hi,

I have implemented timers for library Boost Statechart. It was tested
only on Linux because it uses POSIX threads. It is extension that
replaces fifo_scheduler and fifo_worker with only one class Scheduler.
That means that it is suitable only for asynchronous state machines.

The source codes with example and short description can be downloaded

[Boost-users] directory monitoring with dynamically added dirs

2013-05-14T23:42:12Z

I'm trying to dynamically add directories from a config file before I enter
my programs main loop using the ASIO dir monitor example. I've not been
able to understand the internals yet. Below is my current iteration of what
I'm trying. I have been able to get the simple examples running just like

[Boost-users] (no subject)

2013-05-14T15:10:59Z

Hi
I have a problem with my code I using mpi.
The error is with mca_btl_tcp_frag_recv, and I don´t know what mean...
The error complete

[../../../../../../ompi/mca/bt l/tcp/btl_tcp_frag.c:216:mca_b tl_tcp_frag_recv]
mca_btl_tcp_frag_recv: readv failed: Connection timed out (110)

and

[btl_tcp_frag.c:216:mca_btl_tc p_frag_recv] mca_btl_tcp_frag_recv:

[Boost-users] [msm] Injecting events to FSMs from different translation units

2013-05-13T21:27:36Z

Hi,

I am using boost msm to design state machines for a relatively large
project.

The documentation online is pretty good and I was able to figure out most
features by looking at the sample code (thanks!).

My particular application has multiple FSM instances active at any given
time, and what I would like to do is to be able to generate events for a

[Boost-users] Interprocess : vectors of vectors

2013-05-13T15:05:44Z

Hello,

I'd like to share a vector of vectors (jagged 2D array).
The data come from a deserialization.
I know the size of the "external" vector. The sizes of the "internal" vectors are discovered during deserialization.

I read :
[link]

[Boost-users] boost::addressof and std::nullptr_t

2013-05-12T06:05:34Z

Hello,

With MSVC 2010 the following code fails to compile :

std::nullptr_t np;
boost::addressof( np );

The error being :

1>....\boost/utility/addressof .hpp(59): error C2666:
'boost::detail::addressof_impl <T>::f' : 2 overloads have similar conversions
1> with
1> [

[Boost-users] Constraining unordered template constructors

2013-05-12T04:37:10Z

I have a class that I want to have accept 0-5 arguments in any order for
it's constructor. Each argument is a const references to one of 5
possible class types. All arguments must be distinct in type, passing
the same type twice in an error. Passing an argument that is not one of
the 5 supported types is also an error.

Re: [Boost-users] Boost-users Digest, Vol 3442, Issue 1

2013-05-11T15:52:20Z

Does the wrapping include handling 'qwer' on platforms where int is not 4 bytes?
It may, I don't have a way to test it.

Opinions may differ on the readability of:

typedef mpl::string<'hell','o wo','rld'> ......

vs:

typedef mpl::string<'h','e','l','l','o ',' ','w','o','r','l','d'>.....

[Boost-users] Compile error using boost 1.53.0, clang, libstdc++ and C++11

2013-05-11T10:51:59Z

Hi,

at the moment I try to compile a project that is using boost on my mac.
The project is using c++11 features so I need to use clang with libstdc++.
I compiled boost with:

It seems that trying to include
"boost/date_time/gregorian/gre gorian.hpp" leads to the compile error
below. Googling I found some remarks about char16_t and char32_t types

[Boost-users] CANNOT COMPILE BOOST 153 WITH GCC-4.8

2013-05-10T17:57:47Z

Hi guys,
I've tried to compile boost 153 with gcc-4.8 and two weird things are
happening.

1 - a bunch of warning during compile time
2 - any program using boost thread errors out :

Threading support unavaliable: it has been explicitly disabled with
BOOST_DISABLE_THREADS"

Can you please help me figure out what I'm doing wrong

[Boost-users] [lockfree] overwriting push?

2013-05-10T17:16:58Z

I'm using boost::lockfree::spsc_queue in an audio graph to allow audio
input samples written from one thread to be read from another. This
currently looks like:

class RingBuffer {
public:
RingBuffer() : mLockFreeQueue( 0 ) {}

RingBuffer( size_t size ) : mLockFreeQueue( size + 1 ), mSize( size ) {}

[Boost-users] Boost Serialization now results in a compiler error - I have a fix, but I'm still unsure as to the cause

2013-05-10T07:32:15Z

Dear boosters,

I work with Cinder, creating an audio mixing app. Having recently
reached a milestone, I've upgraded from Vs2010 to Vs2012 as well as to
the latest Cinder (0.8.5) which also upgraded boost to 1.53.

While porting some code over that uses Serialization, I suddenly
provoked the following compiler error:

[Boost-users] Problems with MPI and PBGL

2013-05-10T01:51:02Z

[Boost-users] Access violation while deleting ssl socket

2013-05-10T00:05:42Z

I just upgraded the boost libraries from 1.43 to 1.53 and switched from a 32bit build to a 64bit build. The code worked fine before the upgrade but in 1.53 I am getting an out of access violation while trying to delete the sslSocket.

Here is a sample of the code:

ssl::stream<ip::tcp::socket>* sslSocket = (ssl::stream<ip::tcp::socket>* ) NULL;

[Boost-users] UDP: socket::open does not take an endpoint

2013-05-08T20:01:06Z

Hello,

boost::asio::ip::udp::socket offers two ways to open:

a) pass io_service and endpoint to the socket::socket

b) pass io_service to socket::socket, then call socket::open

===

The UDP async server example uses method (a):

boost::asio::ip::udp::socket Socket(
IoService,
boost::asio::ip::udp::endpoint (boost::asio::ip::udp::v4(), 13));

[Boost-users] weird problem with mutexes on boost::interprocess

2013-05-08T13:10:29Z

It seems we found a weird bug with boost interprocess, some internal
problem on the scoped_lock is generating a deadlock.

A simple correct usage like

void foo() {
scoped_lock<t_mutex> lock(amutex);
.....

is producing the deadlock when running 100 concurrent processes

after changing to

[Boost-users] boost::variant & c++11

2013-05-08T00:39:49Z

Hi -

I seem to have run into a regression with boost::variant from 1.48 to
1.53. With C++11 enabled, using g++, the following code seems to confuse
variant's constructor selection machinery: if you look at the line after
attempts to convert construct from extract<my_variant> to A or B. It should

[Boost-users] boost::disable_interruption problem

2013-05-07T10:52:25Z

Hi. I'm trying to use boost package in Eclipse platform. In this line of
code:

boost::this_thread::disable_in terruption di;

Although boost-1.41.0-17 is installed and I have included boost/thread.hpp
in the code, I receive the this error:

undefined reference to
'boost::this_thread::disable_i nterruption::disable_interrupt ion()

Re: [Boost-users] Boost-users Digest, Vol 3438, Issue 1

2013-05-07T10:59:40Z

In Windows, if you change the size of a mapping you are not guaranteed to get the same
address again.
______________________________ _________________
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Boost-us...@lists.boost.org
[link]

[Boost-users] [Boost.AutoBuffer] discussion

2013-05-07T04:01:23Z

How might I get your current version?

—John

______________________________ _________________
Boost-users mailing list
Boost-us...@lists.boost.org
[link]

[Boost-users] Interprocess : appending data

2013-05-06T16:10:11Z

Hello,

I create a shared_memory_object, truncate it to set its size, and then create a mapped_region.

I would like to know it would be possible to append new data, by applying a new truncation.

Also, is it possible to have a second name pointing in the same memory, but with an offset ?

Thanks.

[Boost-users] [Boost.AutoBuffer] discussion

2013-05-06T07:22:57Z

Thanks. I found that copy, and it had your name on it too, so I figure it must be the
same code.

I like the feature of making an "uninitialized" expansion, too. In particular, for
dealing with "out" parameters of OS API calls or legacy code, I want to naturally give my
buffer as a vector.data(). But it is annoying to me that it needs to zero out the whole

[Boost-users] thread crash on windows with icc in Release

2013-05-06T06:09:10Z

Hello Boost Users,

I want to start using boost.
The program below crashes for me in Release only.

I am running in Visual studio 9.0 with icc 11.1.
I compiled boost (1.53/1.52) with:

void change_count() {}

int main(int, char*[]) {
boost::thread thread_1(change_count);
thread_1.join();

[Boost-users] Call for Papers - Meeting C++ 2013

2013-05-05T14:15:41Z

Hello boost community!

A short reminder that there are only 10 days left to submit a talk to Meeting C++ 2013:

[link]

So far there have been plenty of good talks submitted, the schedule will be really good again!

[Boost-users] Boost under Linux, invoking bootstrap

2013-05-05T11:10:21Z

I am trying to get started using Boost under Linux in order to test my
TTI library using the latest trunk. So first I try using bootstrap with:

./bootstrap.sh --prefix=~/bin

It completes succesfully but nothing is put in my home bin subdirectory.
Did I do something wrong ?

Invoking ./b2 --help does seem to work.

[Boost-users] fusion io problem

2013-05-05T06:03:41Z

Hello,

I run into the problem to provide ostream operator<< support for
spirit's debug facility and for lazyness using fusion's io support:

---8<---

namespace fusion = boost::fusion;

namespace client {

struct point {
int x,y;
};

template<typename CharT>

[Boost-users] mpl::c_str> compile error

2013-05-04T19:24:21Z

Hello,

the code here doesn't compile:

namespace mpl = boost::mpl;

typedef mpl::string<'h','e','l','l','o ',' ','w','o','r','l','d'>::type
my_hello;

int main()
{
std::cout << mpl::c_str<my_hello>::value << '\n';
std::cout << BOOST_MPL_LIMIT_STRING_SIZE << '\n';

As usual, the example from docs works. The error is:

[Boost-users] Access violation while deleting ssl socket

2013-05-03T22:48:02Z

Here is a sample of the code:

ssl::stream<ip::tcp::socket>* sslSocket = (ssl::stream<ip::tcp::socket>* ) NULL;

[Boost-users] Fwd: [BGL] wrapping bundled properties

2013-05-03T22:41:15Z

Hi,

I have my own container and define a wrapper around it to make it behave
like a BGL graph.
Is it possible (and does it make sense) to define wrapper for bundled
properties i.e. I want to control the storage of the bundled properties but
want the expression to evaluate

G[n].color = white

[Boost-users] [Graph] undefined trait functions

2013-05-03T06:50:46Z

Hi!

I've a problem, with Boost Graph Library and gcc 4.7.
I have a legacy graph representation that i like to wrap with a graph
adaptor to access boost graph algorythms.

1: I've created a graph adaptor, that contains my legacy graph. This is a
simple struct:

struct legacy_graph_adaptor {

[Boost-users] What ever happened to Boost.AutoBuffer?

2013-05-02T23:52:05Z

I recall some "detail" code in Boost that does exactly what I want: allocate a
probably-good-enough size on the stack but switch to heap if needed. But I can't remember
where I saw it.

Looking around, I came across mentions of Boost.AutoBuffer by Thorsten Ottosen, but all
links are dead.
______________________________ _________________

[Boost-users] serialization of boost::shared_ptr to stl collection

2013-05-01T12:35:51Z

Hello All,

I have got the following warning

1>boost\boost_1_44_0\boost\mpl \print.hpp(51): warning C4308: negative
integral constant converted to unsigned type
1> boost\boost_1_44_0\boost\seria lization\static_warning.hpp(92 )
being compiled
1> with
1> [
1>

[Boost-users] [BGL] graphviz imcompatible with dijkstra_shortest_paths

2013-05-01T02:36:16Z

Hello,

I try to use graphviz. But when I add "#include
<boost/graph/graphviz.hpp>" to the example
"[link]",
I get a compilation error.

I use boost 1.53 and vs2012 express with command line option "/link
libboost_graph-vc110-s-1_53.li b libboost_regex-vc110-s-1_53.li b". The