ProcInfoFetcher.h

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#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