JSysinfo.hh

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#ifndef __JSYSTEM__JSYSINFO__
#define __JSYSTEM__JSYSINFO__
 
#ifndef __APPLE__
#include <sys/sysinfo.h>
#else
#include <sys/sysctl.h>
#include <iostream>
/**
 * A minimal custom version to define just the data we need.
 *
 * (because on macOS sys/sysinfo does not exist)
 */
struct sysinfo {
  long uptime;              /* Seconds since boot */
  unsigned long totalram;   /* Total usable main memory size */
  unsigned long freeram;    /* Available memory size */
  unsigned int mem_unit{1}; /* Memory unit size in bytes. 1 means we report memory in bytes */
};
#endif
 
/**
 * \file
 * System information.
 * \author mdejong
 */
namespace JSYSTEM {}
namespace JPP { using namespace JSYSTEM; }
 
namespace JSYSTEM {
 
  /**
   * Auxiliary class for system information.
   * This class encapsulates the <tt>sysinfo</tt> data structure.
   */
  struct JSysinfo :
    public sysinfo
  {
#if !defined(__APPLE__)
    /**
     * Default constructor.
     */
    JSysinfo()
    {
      ::sysinfo(static_cast<sysinfo*>(this));
    }
#else
  JSysinfo() {
      unsigned long totalram;
      size_t len=sizeof(totalram);
      sysctlbyname("hw.memsize",&totalram,&len,NULL,0);
      this->totalram = totalram;
      this->uptime = 0;
      this->freeram = 0;
  }
#endif
 
 
    /**
     * Get total RAM.
     *
     * \return              total RAM [B]
     */
    unsigned long long int getTotalRAM() const
    {
      return (unsigned long long int) this->totalram * (unsigned long long int) this->mem_unit;
    }
  };
}
 
#endif