resourceMonitor.hh

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#ifndef resourceMonitor_hh
#define resourceMonitor_hh
 
#include <iostream>
 
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#include <string.h>
#include <time.h>
 
extern "C" { 
#ifdef __sun__
  // Solaris 2.5 does not have getrusage in <sys/resource.h>
  int getrusage(int who, struct rusage* ru);
#endif
}
 
namespace concepts {
 
  // ******************************************************* ResourceMonitor **
 
  class ResourceMonitor {
    friend std::ostream& operator <<(std::ostream& os, ResourceMonitor& rm) { 
      return rm.sample(os); }
 
    rusage ru_;
  public:
    ResourceMonitor() { getrusage(RUSAGE_SELF, &ru_); }
 
    std::ostream& sample(std::ostream& os);
 
    float utime();
  };
  
}
 
  // ******************************************************** ResourceTimer **
 
class ResourceTimer {
public:
 
  ResourceTimer() {
    memset(&t_old, 0, sizeof(t_old));
    memset(&t_cur, 0, sizeof(t_cur));
    start();
  }
 
  ~ResourceTimer() { }
 
  void start();
  double stop(int nrun = 1);
 
  double reset(int nrun = 1) {
    double t = stop(nrun);
    //start();
    t_old = t_cur;
    return t;
  }
 
 
  timespec t_old;
  timespec t_cur;
};
 
#endif // resourceMonitor_hh