|
Hint: you're probably using signed data types. 
Hint2: FFFFFFDE is -34 (i.e. 222 if unsigned char).
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
|
|
|
|
|
Hi All,
I am working on a client server application.
I am having a challenge that i have to serve the 250 client concurrently. Each request takes 2-5 second to execute at server side.
For this what should i use 1 PIPE implementation or SOCKET with a queue? and why?
Which performance is better.
Thanks
|
|
|
|
|
i think if you have to use udp mode, socket might be better.
otherwise i am afraid pipe is better because you just open and close a connect with every client but there would be more operations for socket.
just my own opinion.
|
|
|
|
|
hi,
U can use the following arch if u think this better. go with TCP/IP.
1. create one sock which will be in listen mode.
2. once u got a connect request, create one sock and thread dynmically and bind with the requested client. this socket will serve for that client only.
this can be implemented in multithread mode where on thread always listen for client, and each thread will serve for perticular client.
-Parthi
|
|
|
|
|
I will suggest to use IO Completion Ports with sockets.
i will not advise to have 250 threads for 250 clients...
Search CP with IOCP you will get many good articles..
I hope it helps.
Regards,
Sandip.
|
|
|
|
|
Thanks for the input,
Will it work for the different platform.
I am to create the server for WINDOWS, Linux and MAC.
Thanks
|
|
|
|
|
singh_nav wrote: I am to create the server for WINDOWS, Linux and MAC.
No..
I dont know anything that will work with all three platforms.
I don't understand why server needs to be built for different platforms.
You can have a server on one platform and you can built clients on different platforms.
Your application might have that requirement but just a opinion.
Regards,
Sandip.
|
|
|
|
|
thanks,
Actually my application is build for all these platform.
And i want to design all code into one application, that time i just need to build at different platform only to support it.
Thanks again
|
|
|
|
|
|
Hi all
How do I get my IP address by code? Whats the shortest way possible? I tried getenv but I found out not every computer has their IP add in their environment variables.
Thanks,
Jayjay
|
|
|
|
|
get host name first and then get the details. The following code might be helpful:
char host_name[128];
hostent* host;
gethostname(host_name,128);
host = gethostbyname(host_name);
printf("The local host: Address : %s\n", inet_ntoa(*(struct in_addr*)host->h_addr));
Regards
|
|
|
|
|
Hi kcynic,
the gethostname didnt fill up the host_name. Is there a requirement before using your code?
Thanks,
Jayjay
|
|
|
|
|
did you forget to call WSAStartup？
|
|
|
|
|
Hi kcynic,
It is working now however there is no h_addr just h_addr_list[0] in the struct of hostent, I still can't find the ipadd. Whats your advise on this?
Thanks,
Jayjay
|
|
|
|
|
Hmm, interesting.
With the following code compiled and linked with wsock32, I get an output of
Hostname: xpDesktop
The local host: Address : 210.84.23.xxx
Press any key to continue . . .
#include <windows.h>
#include <winsock2.h>
#include <stdio.h>
int main()
{
char host_name[128];
hostent* host;
WORD verRequested = MAKEWORD(1,1), err;
WSADATA wsaData;
err = WSAStartup(verRequested, &wsaData);
gethostname(host_name,128);
printf("Hostname: %s\n", host_name);
host = gethostbyname(host_name);
printf("The local host: Address : %s\n", inet_ntoa(*(struct in_addr*)host->h_addr));
WSACleanup();
system("pause");
}
|
|
|
|
|
in winsock2.h:
struct hostent {
char FAR * h_name; /* official name of host */
char FAR * FAR * h_aliases; /* alias list */
short h_addrtype; /* host address type */
short h_length; /* length of address */
char FAR * FAR * h_addr_list; /* list of addresses */
#define h_addr h_addr_list[0] /* address, for backward compat */
};
if you call WSAStartup first, you should get the result.
|
|
|
|
|
Actually yes i called WSAStartup first
The host name is jdeguzman however the h_addr_list[0] value is
*jdeguzman
which i dont get why it returns that instead my ip address.
Thanks,
Jayjay
|
|
|
|
|
yes, my result is similar to yours.
and the ip result is returned by calling inet_ntoa function.
what's you code look like?
of course you should check all the callings successful or not. msdn will give you more details i think.
|
|
|
|
|
Its all working now Thanks!
|
|
|
|
|
|
This is my function for you all:
char* GetIpAddress()
{
WSADATA wsaData;
char host_name[128];
hostent* host;
WORD verRequested = MAKEWORD(1,1), err;
err = WSAStartup(verRequested, &wsaData);
gethostname(host_name,128);
host = gethostbyname(host_name);
host->h_addr_list[0];
WSACleanup();
return inet_ntoa(*(struct in_addr*)host->h_addr);
}
|
|
|
|
|
Hi all,
How do I debug a child process inside VC 6.0 or VS in general. The scenario: The main program loads a dll which loads another exe(the process that I wanted to debug), I can debug the dll code fine but can't even set the breakpoint inside created process code. All the related source code was opened inside main program's IDE and all the .pdb files were copied to main program's "debug" dir.
Thanks,
|
|
|
|
|
Go to HKEY_LOCAL_MACHINE>Software>Microsoft>WindowsNT>CurrentVersion>ImageFileExecution Options. Here you can create a key with the name of your exe.[Assuming you are running windowsXP] eg MyProcess.exe.Create a new string value with the following properties. [Name = debugger, data = vsjitdebugger.exe]. Close the registry editor and start your application. When your child process with the name as "MyProcess.exe" gets launched you would be prompted to attach it with vsjitdebugger.
This would only be one way to attach a debugger to your process no sooner than it is launched.
Somethings seem HARD to do, until we know how to do them.
 _AnShUmAn_
|
|
|
|
|
Thanks. I just tried out the IFEO method, the debugger did get triggered but it only left me with a new instance of VS 2008 debugger option(I have both VC6.0 and 9.0 installed) for which I have no way to specify the symbol for the debugger. Is it possible to using the existing VC6.0 debugger(I'm using the VC6.0).
In addition, will DebugBreak for the debugee do the same thing?
Thanks,
|
|
|
|
|
LiYS wrote: ith a new instance of VS 2008 debugger option
You can keep VS 6.0 open and then it would show in the list to select from
LiYS wrote: n addition, will DebugBreak for the debugee do the same thing?
MSDN:The DebugBreak function causes a breakpoint exception to occur in the current process. This allows the calling thread to signal the debugger to handle the exception. The essence is clear now 
Somethings seem HARD to do, until we know how to do them.
_AnShUmAn_
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
