boost asio

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[Boost] Detailed description of the boost library ASIO 6 -- boost: ASIO: Error Usage Analysis

1. Overview Generally, most of the types we create for receiving errors are declared as follows: boost::system::error_code error We use this type to accept Errors generated in functions, such: socket.connect(endpoint, error); If the connection fails, the error type will be saved to error. For example, if the connection to the host fails, this error may be returned. boost::

Boost. Asio c ++ network programming translation (26), boost. asio Network Programming

Boost. Asio c ++ network programming translation (26), boost. asio Network ProgrammingBoost. Asio-Other Features This chapter describes some features that Boost. Asio is not so well kno

The implementation of multi-threaded concurrent processing of ASIO network library in boost, and the scheduling and thread safety of ASIO in multithreaded model.

1. Implement multi-Threading method:It's actually multiple threads calling Io_service::run at the same timefor (int i = 0; I! = m_nthreads; ++i){Boost::shared_ptrBoost::bind (boost::asio::io_service::run,m_ioservice));M_listthread.push_back (PTH);}2, multi-threaded scheduling situation:ASIO specifies that the event completion processor can only be called in a thr

Boost. Asio c ++ network programming translation (24), boost. asio Network Programming

Boost. Asio c ++ network programming translation (24), boost. asio Network ProgrammingMultithreading In the Asynchronous Server I have displayed on the client and the server in Chapter 4th. The Asynchronous Server is single-threaded, and all things happen in main: int main() { talk_to_client::ptr client = talk_to

Boost. Asio c ++ network programming translation (20), boost. asio Network Programming

Boost. Asio c ++ network programming translation (20), boost. asio Network ProgrammingThe Asynchronous Server chart is quite complex. From Boost. Asio, You can see four arrows pointing to on_accept, on_read, on_write, and on_check

Boost. Asio c ++ network programming translation (21), boost. asio Network Programming

Boost. Asio c ++ network programming translation (21), boost. asio Network ProgrammingThe author of synchronous VS asynchronous Boost. Asio made a very amazing job: it allows you to freely choose between synchronous and asynchrono

[Boost] ASIO explanation of boost library 5 -- Resolver and Endpoint usage instructions

TCP: resolver is generally used in combination with TCP: resolver: Query. You can use the word "query" to obtain the corresponding information of the socket, generally, we care about the address and port of socket. through TCP: resolver, it is easy to set and query. It uses query to set the IP address in string format, such as or the Host Name HTTP: // The localhost and port "8080" are converted into the internal representation format of the socket, so that we can directly use the

BOOST. Asio, boost

BOOST. Asio, boost ======================================Copyright Notice====================================== Copyright statement: the original article declined to repost what it said, and despised those crawlers who ignored the copyright to capture blog posts at will. I wish you a very happy early time. Please contact me through "contact email (wlsandwho@foxma

Boost. asio Study Notes 1. Installation of the boost library in linux, boost. asioboost

Boost. asio Study Notes 1. Installation of the boost library in linux, boost. asioboost You are welcome to reprint it. Please enter the original address for reprinting.: Http:// The first step to learn about open-source libraries is to compile and install the librari

C ++ -- boost: Introduction to the use of asio

used at the operating system level. The most significant difference is that, at TCP distance, the Reactor will notify the upper-layer application when the kernel receives TCP data, the following code extracts data from the kernel and calls the processing function for processing (when and how ). After receiving data from TCP, The Proactor will copy the data to the specified space by the kernel, and then immediately call the registered callback function for processing. It seems that Proactor is

[Boost] ASIO explanation of boost Library 8-a few simple examples of TCP

I have made some minor changes and made notes on several examples on the boost official website. Synchronization Client Void test_asio_synclient () {typedef boost: ASIO: io_service ioservice; // The namespace has several common classes: accetpt, resolver, endpoint, sockettypedef boost:

[Boost] Write a simple socket communication program with ASIO

boost/asio库中封装了很多关于scoket的函数,当然,asio库还包含很多底层的库。我们可以用socket编写一个基于UDP协议的黑框通讯程序。要想使用asio里面的函数,大多都需要先创建一个io_service对象,然后通过这个serveice来构造不同的对象,所以第一步,我们得创建两个对象: boost::asio::io_service io_service;

[Boost] ASIO explanation of boost Library 1 -- difference between strand and io_service

Namespace {// strand provides serial execution to ensure thread security. The post or dispatch method will not be executed concurrently. // io_service cannot guarantee thread security. Boost: ASIO: io_service m_service; Boost: ASIO: strand m_strand (m_service); Boost: mutex

[Boost] ASIO explanation of boost library 2 -- io_service: exit when the run function has no task

The io_service: Work class can enable the io_service: Run function to not return the result when no task exists until the work object is destroyed. Void test_asio_nowork () {boost: ASIO: io_service Ios; print_debug ("iOS before"); IOs. run (); print_debug ("iOS end");} void test_asio_work () {boost: ASIO: io_service I

QT+BOOST::ASIO+TCP File Transfer

Client:void Qt_boost::p bsendfileclicked (){QString filename = Ui.lefilename->text ();Qbytearray ba = Filename.tolatin1 ();char * pfilename = ();Std::ifstream IFS (Pfilename, ios::in|ios::binary|ios::ate);Long size = Ifs.tellg ();Char *p = new Char[size];IFS.SEEKG (0, Ios::beg); (p, size);Ifs.close ();Tcp::resolver _resolver (*ioservice);Tcp::resolver::query query (TCP::V4 (), "", "10800");Tcp::resolver::iterator _iterator = _resolver.resolve (query);Tcp::socket _socket

Boost. asio series -- Timer

Synchronize Timer The timer name provided in asio is deadline_timer, which provides the time-out function. First, we will use the simplest Timer synchronization method as an example to demonstrate how to use it. # Include# IncludeInt main (){Boost: asio: io_serviceIo;Boost: asio

Boost. asio series-buffer

: mutable_buffers_type bufs = B. prepare (512); // reserve 512 bytes in output sequenceSize_t n = sock. receive (bufs );B. commit (n); // encoded ed data is "committed" from output sequence to input sequenceStd: istream is ( B );Std: string s;Is> s; In addition, the asio namespace also provides a read_until function that can be used to read strings that meet the specified conditions. This function is very useful for parsing protocols. Size_t n =

Boost note--asio--(1) Simple synchronous communication small sample

Looking at the information of the Boost.asio Library of the day, it is still a little confused. For ASIO's study to continue, at the same time here also recorded the first small example of their own start. It feels better to start with a small example and then to understand what those principles are. Because the conceptual principle is too abstract, with a small example to know how to be a routine. For the ASIO library in the later study will continue

Async_write function of boost ASIO

Boost ASIO is a library for Asynchronous Network Communication. Among them, async_write is a common function. However, if it is not used correctly, unexpected potential bugs may occur. For example, the following code: for (int i=0; i The code is simple, that is, loop N times and send n buffer blocks. Our goal is to receive buffer1, buffer2 ,......, Buffer n. However, in fact, the above Code is faulty, and

Boost::asio Getting Started anatomy

Boost::asio can perform synchronous or asynchronous operations on I/O objects such as sockets, it is necessary to understand Boost::asio, your programs, and the process of their interaction before using Boost::asio. As an example

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