HostInfoIrix.h

Go to the documentation of this file.

//# HostInfo_irix.h: SGI Irix specific memory, swap, and CPU code.
 
 /*
 **  This is a greatly MODIFIED version of a "top" machine dependent file.
 **  The only resemblance it bears to the original is with respect to the
 **  mechanics of finding various system details. The copyright details
 **  follow.
 **
 **  --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
 **
 **  Top users/processes display for Unix
 **  Version 3
 **
 **  This program may be freely redistributed,
 **  but this entire comment MUST remain intact.
 **
 **  Copyright (c) 1984, 1989, William LeFebvre, Rice University
 **  Copyright (c) 1989 - 1994, William LeFebvre, Northwestern University
 **  Copyright (c) 1994, 1995, William LeFebvre, Argonne National Laboratory
 **  Copyright (c) 1996, William LeFebvre, Group sys Consulting
 **  Copyright (c) 2002, Associated Universities Inc.
 */
 
#ifndef CASA_HOSTINFOIRIX_H
#define CASA_HOSTINFOIRIX_H
 
# if defined(HOSTINFO_DO_IMPLEMENT)
 
/*
 *          AUTHOR:       Darrell Schiebel  <drs@nrao.edu>
 *
 * ORIGINAL AUTHORS:      Sandeep Cariapa   <cariapa@sgi.com>
 *                        Larry McVoy       <lm@sgi.com>
 *                        John Schimmel     <jes@sgi.com>
 *                        Ariel Faigon      <ariel@sgi.com>
 */
 
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/swap.h>
#include <sys/sysmp.h>
#include <sys/sysinfo.h>
 
namespace casacore { //# NAMESPACE CASACORE - BEGIN
 
// <summary>
// HostInfo for IRIX machines.
// </summary>
 
// <use visibility=local>
 
// <reviewed reviewer="UNKNOWN" date="before2004/08/25" tests="" demos="">
// </reviewed>
 
// <prerequisite>
//   <li> <linkto class=HostInfo>HostInfo</linkto>
// </prerequisite>
 
// <synopsis> 
// This file provides the IRIX specific functions for HostInfo.
// It is selectively included by HostInfo.cc.
// </synopsis>
//
// <group name="HostInfo">
 
#define pagetok(pages) ((((uint64_t) pages) * pagesize) >> 10)
 
class HostMachineInfo {
friend class HostInfo;
 
    HostMachineInfo( );
    void update_info( );
 
    int valid;
    int cpus;
 
    ptrdiff_t swap_total;
    ptrdiff_t swap_used;
    ptrdiff_t swap_free;
 
    ptrdiff_t memory_total;
    ptrdiff_t memory_used;
    ptrdiff_t memory_free;
 
    ptrdiff_t pagesize;
 
};
 
// </group>
 
 
HostMachineInfo::HostMachineInfo( )  : valid(1) {
 
    pagesize = getpagesize();
 
    if ((cpus = sysmp(MP_NPROCS)) == -1) {
        perror("sysmp(MP_NPROCS)");
        valid = 0;
        return;
    }
 
    struct rminfo   realmem;
    if (sysmp(MP_SAGET, MPSA_RMINFO, &realmem, sizeof(realmem)) == -1) {
        perror("sysmp(MP_SAGET,MPSA_RMINFO, ...)");
        valid = 0;
        return;
    }
 
    memory_total = pagetok(realmem.physmem);
}
 
void HostMachineInfo::update_info( ) {
    int     i;
    struct rminfo   realmem;
    struct sysinfo  sysinfo;
    off_t       fswap;      /* current free swap in blocks */
    off_t       tswap;      /* total swap in blocks */
 
    swapctl(SC_GETFREESWAP, &fswap);
    swapctl(SC_GETSWAPTOT, &tswap);
 
    if (sysmp(MP_SAGET, MPSA_RMINFO, &realmem, sizeof(realmem)) == -1) {
        perror("sysmp(MP_SAGET,MPSA_RMINFO, ...)");
        valid = 0;
        return;
    }
 
    memory_free = pagetok(realmem.freemem);
    memory_used =  memory_total - memory_free;
    swap_total = tswap / 2;
    swap_free = fswap / 2;
    swap_used = swap_total - swap_free;
}
 
# endif
 
} //# NAMESPACE CASACORE - END
 
#endif