Boost-users

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January 2014

110 participants
102 discussions

[ASIO] Async TCP/UDP server design help
by Terry Lazoki 02 Jan '14

02 Jan '14

I'm having hard time understanding the boost asio design and how i can use it to tackle my problem. My problem: Designing a tcp/udp server that is time efficient. 1. User sends packet through tcp 2. Server receives packet and processes it to build a large tree (n > 20000) 3. Server then parses the new tree and sends a summary packet through udp to another client Conditions/Limitations: - Has to be time efficient, receiving, processing and sending has to be done as fast as possible. - Processing the packet is heavy and can cause delays if its done in the same thread - Parsing the tree is also a little heavy when sending it through udp, can cause delays too Design 1 (2 threads): Thread 1: ASIO TCP and UDP. TCP receives packets and adds it to a circular buffer. While at the same time, processes the shared tree and sends packet through udp. Thread 2: Server grabs packet from circular buffer and processes it Some problems here: - I dont understand the async part here. What happens when tcp receives a packet, if the current thread is continuously parsing the tree and sending packets through udp. Do i need to separate the udp part to another thread? - I have 3 parts of the program that i need to run concurrently, well its really 2 parts and receiving packets through tcp. Any help is appreciated. Thanks,

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Problems installing old BOOST version
by squid squid 02 Jan '14

02 Jan '14

Greetings Everyone I'm a phd student in chemometrics and drug design. I am fairly new to ubuntu C programing although I'm rather experienced in C programing in windows. I have recently come accross a number of codes written in 2005 which I'm interested in learning how they work. Those codes needs BOOST library to complie, however they won't compile on the newest BOOST version installed on my ubuntu 12.04. I set the gcc compiler on lenient so that it ignores all those error messages. The code did compile and ran afterwards. However, when I used GDB debugger to watch how the program flows I noticed that there are likely errors in the way the program runs probably due to using a different BOOST version rather than it's original. Hence I like to install the BOOST version corresponding to the code I downloaded. To do that, I installed Ubuntu 6.02 and downloaded BOOST 1.33.1 both of which were created in late 2005. I downloaded BOOST from: http://www.boost.org/users/history/ but I didnt found any detailed instruction on how to install it. Only vague description on using BOOST jam, I played around with BOOST jam for quite awhile and got roughly the installation outline as follows: -*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* Unpack the trazball in /usr/share/ goto the directory /usr/share/boost_1_33_1/tools/build/jam_src run the script ./build.sh the script creats an executable called bjam, copy that file into /usr/share/boost_1_33_1/ run bjam with: ./bjam "-sTOOLS=gcc" install -*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* My problems starts when running the ./build.sh script, resulting in tons of error messages and no bjam file created. The errors look like: -*-*-*-*-*-*-*-*-*-*-*-*-*-* ... ... search.c:187: error too many arguments to function 'timestamp' In file included from subst.c:2: jam.h:398:24: error: sys/types.h: No such file or directory jam.h:399:23: error: sys/stat.h: No such file or directory ... ...lots more errors.... -*-*-*-*-*-*-*-*-*-*-*-*-* I would greatly appreciate any info on how to deal with this issue. Sincerely

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