unix_misc.cpp

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
 *  
 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 
 *      
 * The contents of this file, and the files included with this file, are 
 * subject to the current version of the RealNetworks Public Source License 
 * Version 1.0 (the "RPSL") available at 
 * http://www.helixcommunity.org/content/rpsl unless you have licensed 
 * the file under the RealNetworks Community Source License Version 1.0 
 * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl, 
 * in which case the RCSL will apply. You may also obtain the license terms 
 * directly from RealNetworks.  You may not use this file except in 
 * compliance with the RPSL or, if you have a valid RCSL with RealNetworks 
 * applicable to this file, the RCSL.  Please see the applicable RPSL or 
 * RCSL for the rights, obligations and limitations governing use of the 
 * contents of the file.  
 *  
 * This file is part of the Helix DNA Technology. RealNetworks is the 
 * developer of the Original Code and owns the copyrights in the portions 
 * it created. 
 *  
 * This file, and the files included with this file, is distributed and made 
 * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS 
 * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * 
 * Technology Compatibility Kit Test Suite(s) Location: 
 *    http://www.helixcommunity.org/content/tck 
 * 
 * Contributor(s): 
 *  
 * ***** END LICENSE BLOCK ***** */ 

#include <string.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include "debug.h"

// srobinson : What UNIX was this included for? - perhaps
// we can replace this with an #ifndef for that platform
//
// dbrumley  : I think sys/errono.h is needed on multiple platforms
// (Linux 1&2, FreeBSD, SCO UnixWare, others?).
//          
#if defined _SOLARIS || defined _IRIX || defined _OSF1 || defined _HPUX || defined _AIX || defined _BEOS || defined __QNXNTO__
#include <errno.h>
#include <string.h>                     // for strerror() prototype
#else
#include <sys/errno.h>
#endif

#include "unix_misc.h"
#include "debug.h"

#ifdef _BEOS
#define MAX_BEOS_FDLIMIT 2000
int setfdlimit(int limit)
{
    return limit > MAX_BEOS_FDLIMIT ? MAX_BEOS_FDLIMIT : limit;
}
#else
#if     defined __aix__

int setfdlimit(int limit)
{
        return limit > MAX_AIX_FDLIMIT ? MAX_AIX_FDLIMIT : limit;
}
#else

#if     defined _FREEBSD || defined _OPENBSD || defined _NETBSD
#define RLIM_FMT "%qd"
#else
#define RLIM_FMT "%d"
#endif  /* FreeBSD, *BSD, etc. */

int
setfdlimit(int limit)
{
        struct rlimit rl;
       int reallimit = limit;

        if (getrlimit(FDLIMIT, &rl) < 0) {
                DPRINTF(D_INFO, ("Can not get resource limit: %s\n", 
			strerror(errno)));
                return limit;
        }
        
        DPRINTF(D_INFO, ("cur: " RLIM_FMT ", max: " RLIM_FMT "\n",
                rl.rlim_cur, rl.rlim_max));

        /*
         * Can't get more than the system max limit
         * so adjust the requested limit down.
         */
        if (limit > rl.rlim_max)
                limit = rl.rlim_max;

        /*
         * Set the new limit if it is higher than the current limit
         */
        if (rl.rlim_cur < limit) {
                rl.rlim_cur = limit;

                if (setrlimit(FDLIMIT, &rl) < 0) {
                        DPRINTF(D_INFO, ("Can not set resource limit: %s\n", 
                                strerror(errno)));
                }

                rl.rlim_max = limit;

                if (setrlimit(FDLIMIT, &rl) < 0) {
                        DPRINTF(D_INFO, ("Can not set resource limit: %s\n", 
                                strerror(errno)));
                }

                getrlimit(FDLIMIT, &rl);
        }

#if defined _SUN || defined _SOLARIS
       /* Solaris has a broken getrlimit.  We'll try it the hard way */
       while (rl.rlim_cur < reallimit)
       {
           rl.rlim_cur += 512;
           rl.rlim_max = rl.rlim_cur;
           setrlimit(FDLIMIT, &rl);
       }
#endif

        DPRINTF(D_INFO, ("cur: " RLIM_FMT ", max: " RLIM_FMT "\n",
                rl.rlim_cur, rl.rlim_max));

        return rl.rlim_cur;
}

#endif /* __aix__ */
#endif /* _BEOS */