- Boost-users - lists.boost.org

Catching boost::thread_interrupted
by rbock＠eudoxos.de 08 Sep '08

08 Sep '08

Hi, currently I am making my first steps using Boost.Thread (1.36.0). The interrupt feature looks very cool, so I tried to use it, but somehow failed to catch boost::thread_interrupted. The code is attached to this mail. I was expecting to see something like Thread 0x60b050 got interrupted Thread 0x60b3e0 got interrupted Instead I got Thread 0x60b050 caught something else Thread 0x60b3e0 caught something else Can somebody please enlighten me? Thanks and regards, Roland

1 0

Boost.MPL.Vector -> Boost.Tuple
by Олег Царев 08 Sep '08

08 Sep '08

typedef boost::mpl::vector< A, B, C > Sequence; typedef typename Question< Sequence >::type Result; BOOST_MPL_ASSERT( boost::mpl::is_same< Result, boost::tuple< A, B, C > >); How write Question? I don't want to write specialisation for every dimension of tuple manually. Implementation should be compatible with the last stable Boost release (1.36) Thank you

2 2

What is the logic behind the library naming conventions?
by cowwoc 07 Sep '08

07 Sep '08

Hi, I am investigating possible library naming convention and I would appreciate getting your feedback on why Boost uses the naming convention it does. The discussion thread can be found here: http://discuss.joelonsoftware.com/default.asp?design.4.676033.4 I am sure the Boost team put a lot of thought into this so I would appreciate your insight on this discussion. Thank you, Gili -- View this message in context: http://www.nabble.com/What-is-the-logic-behind-the-library-naming-conventio… Sent from the Boost - Users mailing list archive at Nabble.com.

1 0

Mutidimensional subscriptor operator
by Agustín K-ballo Bergé 07 Sep '08

07 Sep '08

Is there anything at boost that will help me build classes that support multidimensional subscriptor operator? I'm thinking in some CRTP-based solution in which I implement a subscriptor operator taking a tuple (or any other sequence of types type), that would create all the intermediate proxy types needed. Agustín K-ballo Bergé.-

1 0

[dataflow][review] Dataflow.Signals and threading - new docs and examples
by Stjepan Rajko 07 Sep '08

07 Sep '08

Hello, I have added a section on threading to the Dataflow.Signals tutorial: http://tinyurl.com/69subd (my hosting provider appears to be having some intermittent problems today - I apologize to any reviewers impacted by this) This new section summarizes information related to threading, and presents a new example component that uses the Threadpool library by Oliver Kowalke to provide support for asynchronous signals. Here is an excerpt regarding the Threadpool component: The purpose of the component is to make a signal call asynchronous. Instead of the consumer component processing the signal immediately, the signal call will be added to a thread pool and processed later. async_component is a class template, templated on the threadpool type, and the type of the underlying component that will process the asynchronous signal. The three examples provided are: * mixing synchronous and asynchronous signals * assigning priorities to tasks / signals * using asynchronous signals for cyclic networks Thanks to everyone that has participated in the discussion regarding this library so far. I hope this documentation update will provide some additional information on how the library can be used / extended. Stjepan

1 0

Building boost.regex with icu support
by Sean Farrow 07 Sep '08

07 Sep '08

Hi: How do I build boost.regex on windows with bjam and icu support? Cheers Sean. __________ Information from ESET NOD32 Antivirus, version of virus signature database 3423 (20080906) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com

3 7

[dataflow.signals][thread_safe_signals] How to alter the Calling of chained signals
by Manuel Jung 07 Sep '08

07 Sep '08

Hi! I want to use dataflow.signals, which is build on top of thread_safe_signals. Each call of a producer (each signal) is put into a threadpool. Now i want not to execute the whole chain of data processing at once, but just one chain link at the time and put a new task to the threadpool than. The goal is that i can put rather complex and long (running) dataflow chains in the threadpool, which are divided into many pieces, so the threadpool can often decide which task is most important. So how can i alter the call of the next signal in a signal network/chain? Kind regards Manuel

2 12

Directory structure query
by Sean Farrow 07 Sep '08

07 Sep '08

Hi: When building boost regex with icu support with in the C:\Program Files\boost\Boost_trunk\bin.v2\libs\regex\build\msvc-8.0\release\ I have a build-no directory. What is this directory. It appears to build fine, and aditionally seems to be the static library. Any information apreciated. Sean. __________ Information from ESET NOD32 Antivirus, version of virus signature database 3423 (20080906) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com

1 0

newbie question on cyclic shared pointers
by MGE 07 Sep '08

07 Sep '08

Hi guys, I have a data structure containing cycles of boost::shared_ptrs. I understand that this is not advisable since the cycles may not be deleted when shared pointers go out of scope. Possible solutions include the use of weak_ptrs or, alternatively, manually removing the cycles before deletion of pointers. I am finding it difficult to use weak_ptrs because I cannot guarantee that the single shared_ptr will outlive the numerous weak_ptrs. So I am trying to manually break the cycle at deletion. I would be grateful if somebody could take a look at the code below, which illustrates my basic approach. Assuming that I stringently break all cycles when a Child class or Parent class goes out of scope, would this approach avoid memory leaks? Would it be possible to put code into the destructor of Parent and Child classes that automatically sets the shared pointer owned by the class to null (not using the reset() function but by using the method below) hence guaranteeing that cycles are broken at deletion? Thanks for any advice! Best regards, MGE --------------------- struct Child; struct Parent { boost::shared_ptr<Child> myChild; }; struct Child { boost::shared_ptr<Parent> myParent; }; boost::shared_ptr<Child> child(new Child()); boost::shared_ptr<Parent> parent(new Parent()); // create a cycle of pointers parent->myChild = child; child->myParent = parent; // do something // .... // later, manually break the cycle parent->myChild = boost::shared_ptr<Child>(new Child()); child->myParent = boost::shared_ptr<Parent>(new Parent()); // there are no longer any cyclic pointers // parent and child go out of scope here, hopefully releasing all memory? -- View this message in context: http://www.nabble.com/newbie-question-on-cyclic-shared-pointers-tp19353536p… Sent from the Boost - Users mailing list archive at Nabble.com.

2 1

[filesystem] [random] Demo code in August 2008 Linux Gazette
by Scott McMurray 06 Sep '08

06 Sep '08

All, I just saw this article in the Linux Gazette ("Populating a Filesystem with Random Data"), and thought that people looking for a fairly simple example of boost might be interested: http://linuxgazette.net/153/pfeiffer.html Enjoy, ~ Scott

1 0