Re: bounded buffer

Yu Han <>
Sun, 24 Jan 2010 12:26:33 +0800
On 01/24/2010 02:38 AM, Larry wrote:


I am writing a little application to capture audio data from a wavein
device and broadcast it to the

internet over http protocol. My application is basically divided into
two segments:

Capturing Thread:
-> waveCapture // waveCapture.h (class)
-> mp3Encoding // mp3Encoder.h (class)

Broadcasting Thread:
-> httpServer // httpServer (class)

So in a nutshell, the capturing thread is the "Producer" and the
broadcasting thread is the "Consumer".

In order to link them I need to code a buffer. The producer will put
data on it whereas the consumer will

retrieve data from it.

I would like to post some code about the server (barebones) so I can get
to the main point later on:

// all code are in the server
// all locks are omitted
struct Buffer
{ ... };

list<Buffer*> clients;

unsigned int copyBuffer(void*)
   while (1)
     // read data from producer
     // copy data to every client in the list

unsigned int __stdcall handleClient(void* a)

     Buffer buf;
     registe(buf); // insert buf to the clients list

Socket* s = (Socket*) a;
string r = s->ReceiveLine();
if (r.empty())

s->SendLine("Hello, I am the server!");

     // read buf and send it


// Disconnect

delete s;

     unregiste(buf); // Is the parameter necessary?

return 0;

int main()
// Server: set up
SocketServer in(8000,5);


// Server: wait for incoming connections
Socket* s=in.Accept();
cout << "a client connected..." << endl;

// Server: spawn a new thread to deal with the client
unsigned int ret;


As you can see, the server waits for incoming connections and spawns a
thread to deal with a single client each time it connects.

Now, in the handleClient() thread I should retrieve data from the buffer
(being written by the "producer") and send it to the client...

Here comes the pain! Since I have to deal with several connections at
the same time I don't know if they should read from one single buffer or
something else...for instance the producer should write to severl
instances of the buffer...

any idea how I should work this out?


   Yu Han

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