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Synchronous read from a serial port with timeout?
by Gözde Bahar KOŞ 22 Jul '10

22 Jul '10

Hello, Is there a way to use synchronous read function with a timeout mechanism? I want my code to block on read function till data/error comes from the serial port or timeout expires. How can I do this with asio? Best Regards, Gözde Bahar Koş ###################################################################### Dikkat: Bu elektronik posta mesaji kisisel ve ozeldir. Eger size gonderilmediyse lutfen gondericiyi bilgilendirip mesaji siliniz. Firmamiza gelen ve giden mesajlar virus taramasindan gecirilmekte, guvenlik nedeni ile kontrol edilerek saklanmaktadir. Mesajdaki gorusler ve bakis acisi gondericiye ait olup Aselsan A.S. resmi gorusu olmak zorunda degildir. ###################################################################### Attention: This e-mail message is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. E-mails to and from the company are monitored for operational reasons and in accordance with lawful business practices. Any views or opinions presented are solely those of the author and do not necessarily represent the views of the company. ######################################################################

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[bind] Possible to use variadic templates with bind?
by Steve Lorimer 22 Jul '10

22 Jul '10

Hi Is it possible to pass variadic template arguments to bind, such that bind uses them as the placeholder arguments (_1, _2, _3 etc) I show my use case below. struct job_queue { // copy f into list for asynchronous envocation by another thread void enqueue(boost::function<void()> f); }; //----------------------------------------------------------------------- // helper class to define correct form of the member function callback template<class T, typename... Args> struct cb { typedef void (T::*type)(Args...); }; // a job defines a callback function which is any member function taking any number of arguments of any type template<class T, typename... Args> class job_t { boost::shared_ptr<job_queue> queue; boost::function<void(Args...)> arg_func; public: job_t(typename cb<T, Args...>::type cb, boost::shared_ptr<T> that, boost::shared_ptr<job_queue> q) : arg_func(boost::bind(cb, that, Args...)), queue(q) {} // normally would be _1, _2, _3, etc void post(Args&... args) { boost::function<void()> f = boost::bind(arg_func, args...); queue->enqueue(f); } };

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boost 1.42 , vs2010 and Vista
by Michał Nowotka 22 Jul '10

22 Jul '10

Hello, I want to install boost 1.42 on my Vista with Visual Studio 2010 from sources. When I invoke bootstrap.bat I get this error: ---------------------------------------------------------------------------------- c:\boost_1_42_0>bootstrap.bat Building Boost.Jam build engine Failed to build Boost.Jam build engine. Please consult bjam.log for furter diagnostics. You can try to obtain a prebuilt binary from http://sf.net/project/showfiles.php?group_id=7586&package_id=72941 Also, you can file an issue at http://svn.boost.org Please attach bjam.log in that case. --------------------------------------------------------------------------------------------------- In the log file I get: --------------------------------------------------------------------------------------------------- Setting environment for using Microsoft Visual Studio 2010 x86 tools. ERROR: Cannot determine the location of the VS Common Tools folder. ### ### Using 'vc10' toolset. ### c:\boost_1_42_0\tools\jam\src>if exist bootstrap rd /S /Q bootstrap c:\boost_1_42_0\tools\jam\src>md bootstrap c:\boost_1_42_0\tools\jam\src>cl /nologo /RTC1 /Zi /MTd /Fobootstrap/ /Fdbootstrap/ -DNT -DYYDEBUG -wd4996 kernel32.lib advapi32.lib user32.lib /Febootstrap\jam0 command.c compile.c debug.c execnt.c expand.c filent.c glob.c hash.c hdrmacro.c headers.c jam.c jambase.c jamgram.c lists.c make.c make1.c newstr.c option.c output.c parse.c pathunix.c regexp.c rules.c scan.c search.c subst.c timestamp.c variable.c modules.c strings.c filesys.c builtins.c pwd.c class.c w32_getreg.c native.c modules/set.c modules/path.c modules/regex.c modules/property-set.c modules/sequence.c modules/order.c command.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set compile.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set debug.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set execnt.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set expand.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set filent.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set glob.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set hash.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set hdrmacro.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set headers.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set jam.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set jambase.c jamgram.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set lists.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set make.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set make1.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set newstr.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set option.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set output.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set parse.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set Generating Code... Compiling... pathunix.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set regexp.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set rules.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set scan.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set search.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set subst.c subst.c(1) : fatal error C1034: stddef.h: no include path set timestamp.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set variable.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set modules.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set strings.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set filesys.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set builtins.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set pwd.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set class.c c:\boost_1_42_0\tools\jam\src\strings.h(8) : fatal error C1034: stddef.h: no include path set w32_getreg.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set native.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set set.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set path.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set regex.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set property-set.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set Generating Code... Compiling... sequence.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set order.c c:\boost_1_42_0\tools\jam\src\jam.h(88) : fatal error C1034: fcntl.h: no include path set Generating Code... --------------------------------------------------------------------------------------------------- Can you tell me what I'm doing wrong? -- Regards Michał Nowotka

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[xpressive] Buffer-boundary matching
by gbinfo＠web.de 22 Jul '10

22 Jul '10

Hi all, it seems that the buffer-boundary-matching expressions "\a", "\z" etc. are missing from xpressive. Can anyone confirm this? regards Gerd ___________________________________________________________ GRATIS für alle WEB.DE Nutzer: Die maxdome Movie-FLAT! Jetzt freischalten unter http://movieflat.web.de

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[smart_ptr] No locks in quick allocator for shared pointers
by Manish Vachharajani 21 Jul '10

21 Jul '10

I was wondering if there was a standard way to turn off locks in the quick allocator for smart_ptr without disabling threading for all of Boost? It appears that the scoped_locks in the quick allocator are controlled by BOOST_HAS_THREADS. In turn, BOOST_HAS_THREADS seems to be controllable via BOOST_DISABLE_THREADS. However, I do not want to use this option as I need to link multiple programs against the same boost non-header libraries. Some programs have threading others do not. I want to be able to selectively disable locking for the non-threaded programs. If there is not better way to do this, the patch below adds a BOOST_QA_DISABLE_THREADS that will eliminate the scoped locks. --- .../boost/smart_ptr/detail/quick_allocator.hpp | 12 ++++++------ 1 files changed, 6 insertions(+), 6 deletions(-) diff --git a/ext/boost_1_43_0/boost/smart_ptr/detail/quick_allocator.hpp b/ext/boost_1_43_0/boost/smart_ptr/detail/quick_allocator.hpp index 159bd5e..ed878cb 100644 --- a/ext/boost_1_43_0/boost/smart_ptr/detail/quick_allocator.hpp +++ b/ext/boost_1_43_0/boost/smart_ptr/detail/quick_allocator.hpp @@ -70,7 +70,7 @@ template<unsigned size, unsigned align_> struct allocator_impl #endif -#ifdef BOOST_HAS_THREADS +#if defined(BOOST_HAS_THREADS) && !defined(BOOST_QA_DISABLE_THREADS) static lightweight_mutex & mutex() { @@ -89,7 +89,7 @@ template<unsigned size, unsigned align_> struct allocator_impl static inline void * alloc() { -#ifdef BOOST_HAS_THREADS +#if defined(BOOST_HAS_THREADS) && !defined(BOOST_QA_DISABLE_THREADS) lightweight_mutex::scoped_lock lock( mutex() ); #endif if(block * x = free) @@ -119,7 +119,7 @@ template<unsigned size, unsigned align_> struct allocator_impl } else { -#ifdef BOOST_HAS_THREADS +#if defined(BOOST_HAS_THREADS) && !defined(BOOST_QA_DISABLE_THREADS) lightweight_mutex::scoped_lock lock( mutex() ); #endif if(block * x = free) @@ -144,7 +144,7 @@ template<unsigned size, unsigned align_> struct allocator_impl { if(pv != 0) // 18.4.1.1/13 { -#ifdef BOOST_HAS_THREADS +#if defined(BOOST_HAS_THREADS) && !defined(BOOST_QA_DISABLE_THREADS) lightweight_mutex::scoped_lock lock( mutex() ); #endif block * pb = static_cast<block *>(pv); @@ -161,7 +161,7 @@ template<unsigned size, unsigned align_> struct allocator_impl } else if(pv != 0) // 18.4.1.1/13 { -#ifdef BOOST_HAS_THREADS +#if defined(BOOST_HAS_THREADS) && !defined(BOOST_QA_DISABLE_THREADS) lightweight_mutex::scoped_lock lock( mutex() ); #endif block * pb = static_cast<block *>(pv); @@ -171,7 +171,7 @@ template<unsigned size, unsigned align_> struct allocator_impl } }; -#ifdef BOOST_HAS_THREADS +#if defined(BOOST_HAS_THREADS) && !defined(BOOST_QA_DISABLE_THREADS) template<unsigned size, unsigned align_> lightweight_mutex * allocator_impl<size, align_>::mutex_init = &allocator_impl<size, align_>::mutex(); -- 1.7.0.1 Manish

1 0

PBGL Compile error on windows.
by Khaldoun "Hal" Alaqqad 21 Jul '10

21 Jul '10

I am trying to build the PBGL's boost_graph_mpi on windows 7 64bit. I generated the project files for VS 8/9/10, however the build has consistently shown compile errors: distributed_property_map.hpp(240): error C3855: 'boost::parallel::detail::associative_cache_ghost_cell_storage': template parameter 'Associativity' is incompatible with the declaration I tried to look for hints anywhere on the web, but did not find anything. Can anybody advise. Thanks.

1 0

Multi_index composite_key~~
by isjk 21 Jul '10

21 Jul '10

hi all, now,I have a composite_key like this, struct leader_key : boost::multi_index::composite_key< channel_info, BOOST_MULTI_INDEX_MEMBER(channel_info, boost::uint64_t, st_md5_), BOOST_MULTI_INDEX_MEMBER(channel_info, boost::uint32_t, st_rank_), BOOST_MULTI_INDEX_MEMBER(channel_info, boost::uint8_t, st_degrees_), BOOST_MULTI_INDEX_MEMBER(channel_info, boost::uint8_t, st_lan_type_) > { }; I used "md5, rank, degrees, lan_type" to query. I want to the result like this, equal to md5, less than rank degrees from small to large equal to lan_type How should I do?

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[BGL] request to be added to list of BGL users
by Nil Geisweiller 21 Jul '10

21 Jul '10

Hi, OpenCog, an open source Artificial General Intelligence framework project http://www.opencog.org/wiki/The_Open_Cognition_Project uses BGL and we'll be pleased to be added to the list of BGL Users. Should you need any more info let me know. Regards, Nil

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Odd boost::filesystem path behaviour?
by Tim Rawlinson 21 Jul '10

21 Jul '10

Hi, The following seems wrong to me, specifically the behaviour on Windows: path("/c:/file") Linux Windows by iteration "/", "c:", "file" "/", "c:", "/", "file" root_path "/" "/" relative_path "c:/file" "file" Is this behaviour correct? For reference, the boost::filesystem documents says: "All basic_path string or sequence arguments that describe a path shall accept the portable pathname format, ...", which the above path seems to be but it is interpreting it in a platform specific and, to my eyes, incorrect way. - Tim

1 0

[thread/condition_variable] crashes in condition variable
by Dietmar Hummel 21 Jul '10

21 Jul '10

Hi all! I have a problem with the condition variable class. I wrote a sync object class (something which two threads have a reference to, the one is waiting on in in wait() the other will signal it with signal(). This is some pseudo code which illustrates my problem: function doSomething() { // the sync object is to keep this thread // waiting until the other one is done CPGSUSyncObject cSyncObject; // give a pointer of the sync object to another thread ... // at one time in the future the other thread will call // its signal routine which calls condition_variable::notify_all // wait until the other one has done its tasks cSyncObject.wait(); } My problem (as far as I can see it) is the following: condition_variable::notify_all() calls wake_waiters() but does further tasks after this call (I assume that wake_waiters() is doing the real signalling by the os?). But if I have the task switch fast enough, it may happen that my doSomething() method runs out of scope deleting cSyncObject which is itself deleting the condition_variable. So the vector iteration code in condition_variable::notify_all() crashes because the object is already destroyed... Any help or good hints are appreciated... Regards Dietmar

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