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Two player game, forking & sockets
Post 302528138 by Shang on Monday 6th of June 2011 01:05:50 PM
06-06-2011
Two player game, forking & sockets
Hi.
I am just making first steps in Linux POSIX programming. I have read some tutorials on processes, signals and sockets (thanks Beej!), so some basic knowledge I have already got.
I want to write some very basic game server. My idea is to have main process, which is waiting for new players. If there are at least two clients connected, spawn one process per every player and then start doing some actions (not relevant now). Players (separate processes) would communicate in pairs through hm... I don't know yet, for sure some IPC structure.
According to this very general approach (I am just beginner
) I have few questions:
1. How to provide proper waiting for players, for example when there is no clients at all or there is only one and waits for opponent?
2. How to handle three way inter-process communication? I mean between main process, player1 process, player3 process. I am guessing I would have to use some semaphores.
3. How to handle such communication, when the main process has to gather some information about paired clients moves and waiting for new clients at the same time? Can it be done in one, main process?
4. Could you explain me some basic algorithm how such program should be properly constructed? Some skeleton, names of functions, which manuals I have to study and general hints in order not to make steps blindly.
Thank you in advance.
I am just making first steps in Linux POSIX programming. I have read some tutorials on processes, signals and sockets (thanks Beej!), so some basic knowledge I have already got.
I want to write some very basic game server. My idea is to have main process, which is waiting for new players. If there are at least two clients connected, spawn one process per every player and then start doing some actions (not relevant now). Players (separate processes) would communicate in pairs through hm... I don't know yet, for sure some IPC structure.
According to this very general approach (I am just beginner
) I have few questions:1. How to provide proper waiting for players, for example when there is no clients at all or there is only one and waits for opponent?
2. How to handle three way inter-process communication? I mean between main process, player1 process, player3 process. I am guessing I would have to use some semaphores.
3. How to handle such communication, when the main process has to gather some information about paired clients moves and waiting for new clients at the same time? Can it be done in one, main process?
4. Could you explain me some basic algorithm how such program should be properly constructed? Some skeleton, names of functions, which manuals I have to study and general hints in order not to make steps blindly.
Thank you in advance.
Last edited by Shang; 06-06-2011 at 02:11 PM..
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wait
wait(1) General Commands Manual wait(1) NAME
wait - await process completion SYNOPSIS
[pid] DESCRIPTION
If no argument is specified, waits until all processes (started with of the current shell have completed, and reports on abnormal termina- tions. If a numeric argument pid is given and is the process ID of a background process, waits until that process has completed. Other- wise, if pid is not a background process, exits without waiting for any processes to complete. Because the system call must be executed in the parent process, the shell itself executes without creating a new process (see wait(2)). Command-Line Arguments supports the following command line arguments: The unsigned decimal integer process ID of a command, whose termination is to wait for. WARNINGS
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wait(1)