April 2013 - Boost-users - lists.preview.boost.org

safe check if lockfree::queue is empty
by niXman 02 Apr '13

02 Apr '13

Hi, I read the docs about lockfree::queue::empty() and understang what this way is not safe in multithreaded program. The question is, how can I verify that the queue is empty? Will it be correct the following code? bool empty() { T *tmp = 0; if ( queue.pop(tmp) ) { queue.push(tmp); return false; } return true; } Thanks. -- Regards, niXman ___________________________________________________ Dual-target(32 & 64-bit) MinGW compilers for 32 and 64-bit Windows: http://sourceforge.net/projects/mingwbuilds/ ___________________________________________________ Another online IDE: http://liveworkspace.org/

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Good lock_guard<mytype> example
by Michael Powell 02 Apr '13

02 Apr '13

Hello, The pattern goes something like this: boost::lock_guard<mytype> guard(*this). However, compiler is asking for a lock or unlock. I don't know what this is, or what it should be. Thank you... Regards, Michael Powell

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Newbie Interprocess message_thread user
by John Davies 01 Apr '13

01 Apr '13

I'm new to Boost and new to Linux. But old to Windows. So I'm doing some initial development in Windows XP. I have two executables made in different projects. I planned on using a message_queue to communicate between the two applications. But sending a message from one app does not make it to the other. I can add and handle messages from one thread to another within the same application. SO I know I have things partially setup correctly. But now I'm at a complete loss. Should two exe files be able to communicate through Boost message_queues? Or am I misunderstanding the whole thing?

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[Boost.Container] missing image in the documentation
by ilya shlyakhter 01 Apr '13

01 Apr '13

At the URL http://www.boost.org/doc/libs/1_53_0/doc/html/container/non_standard_contai… the illustration of stable vector is missing.

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How should I define a wchar_t type for use in mbtowc? [Android] [Serialization]
by Wesley Paugh 01 Apr '13

01 Apr '13

I'm attempting to port Serialization code to Android. Android-ndk-r8d does not have mbtowc implemented, which Serialization apparently uses, somewhere. I would like to recreate this function myself, rather than find another Serialization library entirely or write one myself. The function leverages the wchar_t type, which also does not appear to built into android-ndk-r8d. What is boost serialization expecting this type to be? Can I grab an implementation of it from off of a shelf somewhere?

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