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works, but not yet used. And wants relay host identifier added in.

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This commit is contained in:
ehouse 2005-09-19 04:34:51 +00:00
parent 57ccb08528
commit 255656f009
2 changed files with 97 additions and 0 deletions
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57
xwords4/relay/permid.cpp Normal file
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/* -*-mode: C; fill-column: 78; c-basic-offset: 4; -*- */
/*
* Copyright 2005 by Eric House (fixin@peak.org). All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "permid.h"
#include <stdio.h>
#include "mlock.h"
using namespace std;
pthread_mutex_t PermID::s_guard = PTHREAD_MUTEX_INITIALIZER;
string
PermID::GetNextUniqueID()
{
MutexLock ml( &s_guard );
char buf[32]; /* should last for a while :-) */
FILE* f = fopen( "/etc/xwrelay/xwrelay_id.txt", "r+" );
if ( f ) {
fscanf( f, "%s\n", buf );
rewind( f );
} else {
f = fopen( "/etc/xwrelay/xwrelay_id.txt", "w" );
buf[0] = '0';
buf[1] = '\0';
}
int n = atoi(buf) + 1;
sprintf( buf, "%d", n );
fprintf( f, "%s\n", buf );
fclose( f );
string s(buf);
logf( "new id will be %s", s.c_str() );
return s;
}

40
xwords4/relay/permid.h Normal file
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/* -*-mode: C; fill-column: 78; c-basic-offset: 4; -*- */
/*
* Copyright 2005 by Eric House (fixin@peak.org). All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _PERMID_H
#define _PERMID_H
#include <string>
/* Able to get a unique ID for every game ever started. A simple file
* somewhere stores an ascii string representing a number. That's
* incremented, saved and returned each time. In a world with multiple relays
* (multiple machines) the ID could include a host identifier to guarantee
* uniqueness.
*/
class PermID {
public:
static std::string GetNextUniqueID();
private:
static pthread_mutex_t s_guard; /* guard access to the whole process */
};
#endif