{ gROOT->Reset(); // Create a new canvas and 3 pads TCanvas *c1; TPad *pad1, *pad2, *pad3; if (!gROOT->IsBatch()) { c1 = new TCanvas("c1","Shared Memory Consumer Example",200,10,700,780); pad1 = new TPad("pad1","This is pad1",0.02,0.52,0.98,0.98,21); pad2 = new TPad("pad2","This is pad2",0.02,0.02,0.48,0.48,21); pad3 = new TPad("pad3","This is pad3",0.52,0.02,0.98,0.48,21); pad1->Draw(); pad2->Draw(); pad3->Draw(); } // Open the memory mapped file "hsimple.map" in "READ" (default) mode. mfile = TMapFile::Create("hsimple.map"); // Print status of mapped file and list its contents mfile->Print(); mfile->ls(); // Create pointers to the objects in shared memory. TH1F *hpx = 0; TH2F *hpxpy = 0; TProfile *hprof = 0; // Loop displaying the histograms. Once the producer stops this // script will break out of the loop. Double_t oldentries = 0; while (1) { hpx = (TH1F *) mfile->Get("hpx", hpx); hpxpy = (TH2F *) mfile->Get("hpxpy", hpxpy); hprof = (TProfile *) mfile->Get("hprof", hprof); if (!hpx || !hpxpy || !hprof || hpx->GetEntries() == oldentries) break; oldentries = hpx->GetEntries(); if (!gROOT->IsBatch()) { pad1->cd(); hpx->Draw(); pad2->cd(); hprof->Draw(); pad3->cd(); hpxpy->Draw("cont"); c1->Modified(); c1->Update(); } else { printf("Entries, hpx=%lld, Mean=%g, RMS=%g\n", (Long64_t)hpx->GetEntries(),hpx->GetMean(),hpx->GetRMS()); } gSystem->Sleep(100); // sleep for 0.1 seconds if (gSystem->ProcessEvents()) break; } }