C#•12mo ago

heart beat in console program

I have a code that implements multi-threaded socket communication with c++, and I want to add an additional heart beat code. However, when the server is waiting for a client message through recv for each thread, how does make run the heart beat? If you let me know the logic or hint, I want to try it.

 
while ((nReceive = ::recv(hClient,
                            szBuffer, sizeof(szBuffer), 0)) > 0)
    {
        puts(szBuffer);
        //Send received strings to all connected clients
        SendChattingMessage(szBuffer);
        memset(szBuffer, 0, sizeof(szBuffer));
    }

 
while ((nReceive = ::recv(hClient,
                            szBuffer, sizeof(szBuffer), 0)) > 0)
    {
        puts(szBuffer);
        //Send received strings to all connected clients
        SendChattingMessage(szBuffer);
        memset(szBuffer, 0, sizeof(szBuffer));
    }

recv enter infiniteloop, and waiting until recevie message from client. i wanna make heart beat code. but It can't since recv. this is all code: https://ideone.com/TWRvnB

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15 Replies

Buddy•12mo ago

C++ and C# are two entirely different languages $cpp

MODiX•12mo ago

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JJOP•12mo ago

If C#, How to resolve this problem? I think idea(algorithm) is same whatever any langauge

Buddy•12mo ago

There are different heartbeat implementations, most of the time you can just send a single byte and that is the heartbeat, each 15th second or so.

JJOP•12mo ago

yea, i know, but since receive, I can't image idea. because

 while ((nReceive = ::recv(hClient,
                            szBuffer, sizeof(szBuffer), 0)) > 0)

 while ((nReceive = ::recv(hClient,
                            szBuffer, sizeof(szBuffer), 0)) > 0)

Threads on the server enter an infinite standby state through recv, so that any thread cannot send a message to the client by heartbeats after a certain period of time.

Buddy•12mo ago

Huh?

JJOP•12mo ago

Could you understand my meaning?

Jimmacle•12mo ago

you're sending and receiving on the same thread?

JJOP•12mo ago

upload code is not include thread about heart beat

Jimmacle•12mo ago

i didn't look at the code, i don't understand what the problem is

JJOP•12mo ago

this is my code https://ideone.com/7YeptO I included heart beat thread

Ideone.com

Ideone is something more than a pastebin; it's an online compiler and debugging tool which allows to compile and run code online in more than 40 programming languages.

Jimmacle•12mo ago

i'm not asking for more code, i'm asking for you to explain the issue more clearly i don't know C++ that well anyway

JJOP•12mo ago

Even if a heartbeat thread is created after acceptance or before acceptance, it is executed only at the beginning, but is not executed again after being executed once. This is because each thread is in a standby state through receive. this is my issue

Jimmacle•12mo ago

am i missing something or is your heartbeat thread not a loop? if you don't use a loop it's only going to execute the code once

JJOP•12mo ago

oh thanks, I understood. Actuall I didn't know thread execute in the loop continuosly

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heart beat in console program