ProcInfoFetcher.h

Go to the documentation of this file.

#ifndef FWCore_Services_ProcInfoFetcher_h
#define FWCore_Services_ProcInfoFetcher_h
// -*- C++ -*-
//
// Package:     Services
// Class  :     ProcInfoFetcher
//
//
// Original Author:  Chris Jones
//         Created:  Sun May  6 11:14:28 CDT 2012
//

// system include files

// user include files

// forward declarations
namespace edm {
  namespace service {
    struct ProcInfo {
      ProcInfo() : vsize(), rss() {}
      ProcInfo(double sz, double rss_sz) : vsize(sz), rss(rss_sz) {}

      bool operator==(const ProcInfo& p) const { return vsize == p.vsize && rss == p.rss; }

      bool operator>(const ProcInfo& p) const { return vsize > p.vsize || rss > p.rss; }

      // see proc(4) man pages for units and a description
      double vsize;  // in MB (used to be in pages?)
      double rss;    // in MB (used to be in pages?)
    };

    class ProcInfoFetcher {
    public:
      ProcInfoFetcher();
      ~ProcInfoFetcher();
      ProcInfoFetcher(ProcInfoFetcher const&) = delete;
      ProcInfoFetcher& operator=(ProcInfoFetcher const&) = delete;

      ProcInfo fetch() const;

    private:
      double pg_size_;
      int fd_;
      mutable char buf_[500];
    };
  }  // namespace service
}  // namespace edm
#endif