/* Record the host after connection is established*/
static void host_added(int ihost, int sock){
htime[ihost]=myclockd();
proc_remove_all(ihost);/*remove all entries. */
LOCK(mhost);
nhostup++;
hsock[ihost]=sock;
FD_SET(sock, &active_fd_set);
UNLOCK(mhost);
add_host_wrap(-1);//wakes up listen_host().
info("connected to %s\n", hosts[ihost]);
gdk_threads_add_idle(host_up, GINT_TO_POINTER(ihost));
}
/*remove the host upon disconnection*/
static void host_removed(int sock){
int ihost=host_from_sock(sock);
if(ihost==-1) return;
close(sock);
LOCK(mhost);
nhostup--;
hsock[ihost]=-1;
FD_CLR(sock, &active_fd_set);
UNLOCK(mhost);
add_host_wrap(-1);
gdk_threads_add_idle(host_down, GINT_TO_POINTER(ihost));
info("disconnected from %s\n", hosts[ihost]);
}
/**
called by monitor to talk to scheduler.
*/
int scheduler_cmd(int host,int pid, int command){
if(command==CMD_DISPLAY){
return scheduler_display(host, pid);
}else{
int sock=hsock[host];
if(sock==-1){
add_host_wrap(host);
sleep(1);
}
if(sock==-1) return 1;
int cmd[2];
cmd[0]=command;
cmd[1]=pid;/*pid */
int ans=stwriteintarr(sock,cmd,2);
if(ans){/*communicated failed.*/
close(sock);
}
return ans;
}
}
