chase
396 lines
9.0 KiB
C
396 lines
9.0 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/* $TOG: SmConMgmt.c /main/6 1998/04/06 14:35:42 mgreess $ */
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/* *
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* (c) Copyright 1993, 1994 Hewlett-Packard Company *
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* (c) Copyright 1993, 1994 International Business Machines Corp. *
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* (c) Copyright 1993, 1994 Sun Microsystems, Inc. *
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* (c) Copyright 1993, 1994 Novell, Inc. *
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*/
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/*************************************<+>*************************************
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*****************************************************************************
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**
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** File: SmConMgmt.c
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**
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** Project: HP DT Session Manager (dtsession)
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**
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** Description:
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** -----------
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** Contains all code which performs contention management functionality
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**
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**
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*******************************************************************
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** (c) Copyright Hewlett-Packard Company, 1990. All rights are
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** reserved. Copying or other reproduction of this program
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** except for archival purposes is prohibited without prior
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** written consent of Hewlett-Packard Company.
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********************************************************************
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**
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**
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**
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*****************************************************************************
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*************************************<+>*************************************/
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#include <stdio.h>
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#include <fcntl.h>
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#if !defined(__linux__)
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#include <nlist.h>
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#endif
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#include <X11/Intrinsic.h>
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#include "Sm.h"
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#include "SmProtocol.h"
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#include "SmConMgmt.h"
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#include "SmCommun.h"
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/*
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* Define statements
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*/
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#ifdef mips
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#include <sys/fixpoint.h>
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#endif /* mips */
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#ifndef KMEM_FILE
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#define KMEM_FILE "/dev/kmem"
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#endif
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#ifndef KERNEL_FILE
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# ifdef mips
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# define KERNEL_FILE "/vmunix"
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# else /* not mips */
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# define KERNEL_FILE "/hp-ux"
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# endif /* mips */
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#endif
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#ifdef mips
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#define GPGSLIM "gpgslim"
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#define FREEMEM "freemem"
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#else /* not mips */
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# ifdef __hpux
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# ifdef __hp9000s800
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# define GPGSLIM "gpgslim"
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# define FREEMEM "freemem"
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# endif /* __hp9000s800 */
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# endif /* __hpux */
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#endif /* mips */
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#ifndef GPGSLIM
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#define GPGSLIM "_gpgslim"
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#endif /* not defined GPGSLIM */
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#ifndef FREEMEM
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#define FREEMEM "_freemem"
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#endif /* not defined FREEMEM */
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int clientRunning;
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/*
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* Variables global to this module only
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*/
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#if !defined(__linux__)
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static struct nlist namelist[3];
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#endif
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static int freemem_loc, gpgslim_loc, gpgslim, freemem;
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static int clientTimeout;
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/*
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* Functions local to this module
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*/
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static void HandleClientMessage(Widget smWidget, XtPointer dummy,
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XEvent *event);
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static void WaitClientTimeout(XtPointer, XtIntervalId *);
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/*************************************<->*************************************
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*
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* GetMemoryUtilization ()
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*
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*
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* Description:
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* -----------
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* Returns 1 of 3 values. Tells the calling program that memory is not
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* available, that it is full (paging has started), or that it is not
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* full.
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*
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*
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* Inputs:
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* ------
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*
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*
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* Outputs:
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* -------
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* An integer value representing the current memory utilization of the
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* system.
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*
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*
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* Comments:
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* --------
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* WARNING: This routine, by its very nature is non-portable. It depends
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* on an OS having some kind of access to its memory utilization.
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*
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* DOUBLE WARNING: The mips architecture code has never been tested.
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*
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*
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*************************************<->***********************************/
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int
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GetMemoryUtilization(void)
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{
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#if !defined(__linux__)
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static int init = 0;
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static int kmem;
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#if !defined(SVR4) && !defined(hpV4) && !defined(_POWER) && !defined(CSRG_BASED)
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extern void nlist();
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#endif
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int i;
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#ifdef __hpux
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setresgid(-1, smGD.conMgmtGID, -1);
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#else
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#ifndef SVR4
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setregid(smGD.runningGID, smGD.conMgmtGID);
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#else
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setgid(smGD.runningGID);
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setegid(smGD.conMgmtGID);
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#endif
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#endif
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if(!init)
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{
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namelist[0].n_name = FREEMEM;
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namelist[1].n_name = GPGSLIM;
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namelist[2].n_name = (char *) NULL;
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nlist( KERNEL_FILE, namelist);
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for(i = 0; i < 2; i++)
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{
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if (namelist[i].n_type == 0 ||
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namelist[i].n_value == 0)
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{
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#ifdef __hpux
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setresgid(-1, smGD.runningGID, -1);
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#else
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#ifndef SVR4
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setregid(smGD.conMgmtGID, smGD.runningGID);
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#else
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setgid(smGD.conMgmtGID);
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setegid(smGD.runningGID);
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#endif
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#endif
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return(MEM_NOT_AVAILABLE);
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}
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}
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freemem_loc = namelist[0].n_value;
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gpgslim_loc = namelist[1].n_value;
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kmem = open(KMEM_FILE, O_RDONLY);
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if (kmem < 0)
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{
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#ifdef __hpux
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setresgid(-1, smGD.runningGID, -1);
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#else
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#ifndef SVR4
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setregid(smGD.conMgmtGID, smGD.runningGID);
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#else
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setgid(smGD.conMgmtGID);
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setegid(smGD.runningGID);
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#endif
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#endif
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return(MEM_NOT_AVAILABLE);
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}
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(void) lseek(kmem, gpgslim_loc, 0);
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#ifdef mips
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{
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fix temp;
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(void) read(kmem, (char *)&temp, sizeof(fix));
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gpgslim = FIX_TO_DBL(temp);
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}
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#else /* not mips */
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(void) read(kmem, (char *)&gpgslim, sizeof(int));
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#endif /* mips */
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init = 1;
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}
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(void) lseek(kmem, freemem_loc, 0);
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#ifdef mips
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{
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fix temp;
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(void) read(kmem, (char *)&temp, sizeof(fix));
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freemem = FIX_TO_DBL(temp);
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}
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#else /* not mips */
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(void) read(kmem, (char *)&freemem, sizeof(int));
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#endif /* mips */
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#ifdef __hpux
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setresgid(-1, smGD.runningGID, -1);
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#else
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#ifndef SVR4
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setregid(smGD.conMgmtGID, smGD.runningGID);
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#else
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setgid(smGD.conMgmtGID);
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setegid(smGD.runningGID);
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#endif
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#endif
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if(freemem >= gpgslim)
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{
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return(MEM_NOT_FULL);
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}
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else
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{
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return(MEM_FULL);
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}
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#else /* linux */
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return(MEM_NOT_FULL);
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#endif /* linux */
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}
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/*************************************<->*************************************
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*
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* WaitForClientMap ()
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*
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*
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* Description:
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* -----------
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* This routine waits for the workspace manager to send it information
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* about a client being mapped, before returning to start the next client
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*
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*
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* Inputs:
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* ------
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*
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*
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* Outputs:
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* -------
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*
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* Comments:
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* --------
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*
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*************************************<->***********************************/
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void
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WaitForClientMap( void )
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{
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XtInputMask isThere;
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XEvent event;
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XClientMessageEvent *cEvent = (XClientMessageEvent *) &event;
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XtIntervalId clientTimerId;
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XtAddEventHandler(smGD.topLevelWid,
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0,
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True,
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(XtEventHandler)HandleClientMessage,
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(XtPointer) NULL);
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/*
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* Set a timer which stops the block on waiting for the
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* client to start. This value is fetched from the
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* waitClientTimeout resource.
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*/
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clientRunning = False;
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clientTimeout = False;
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clientTimerId = XtAppAddTimeOut(smGD.appCon,
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smRes.waitClientTimeout,
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WaitClientTimeout, NULL);
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while((clientRunning == False) && (clientTimeout == False))
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{
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XtAppProcessEvent(smGD.appCon, XtIMAll);
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}
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XtRemoveTimeOut(clientTimerId);
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XtRemoveEventHandler(smGD.topLevelWid,
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0,
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True,
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(XtEventHandler)HandleClientMessage,
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(XtPointer) NULL);
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return;
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}
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/*************************************<->*************************************
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*
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* WaitClientTimeout
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*
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*
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* Description:
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* -----------
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* Timeout procedure the WaitForClientMap routine. It stops a loop waiting
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* for the last started app to get mapped.
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*
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*
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* Inputs:
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* ------
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*
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*
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* Outputs:
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* -------
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* clientTimeout = (global) flag that stops the loop
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*
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* Comments:
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* --------
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*
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*************************************<->***********************************/
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static void
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WaitClientTimeout(
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XtPointer client_data,
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XtIntervalId *id )
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{
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clientTimeout = True;
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return;
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}
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/*************************************<->*************************************
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*
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* HandleClientMessage
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*
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*
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* Description:
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* -----------
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* This is the event handler registered to receive the client message
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* from dtwm when a client has beem managed
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*
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*
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*************************************<->***********************************/
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static void
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HandleClientMessage( Widget smWidget,
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XtPointer dummy,
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XEvent *event)
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{
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if (event->type == ClientMessage)
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{
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ProcessClientMessage(event);
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}
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return;
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} /* END OF FUNCTION HandleClientMessage */
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