diff options
Diffstat (limited to 'chrome_frame/chrome_frame_histograms.h')
-rw-r--r-- | chrome_frame/chrome_frame_histograms.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/chrome_frame/chrome_frame_histograms.h b/chrome_frame/chrome_frame_histograms.h new file mode 100644 index 0000000..03aaab5 --- /dev/null +++ b/chrome_frame/chrome_frame_histograms.h @@ -0,0 +1,54 @@ +// Copyright (c) 2009 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#ifndef CHROME_FRAME_HISTOGRAM_SNAPSHOTS_H_ +#define CHROME_FRAME_HISTOGRAM_SNAPSHOTS_H_ + +#include <map> +#include <string> +#include <vector> + +#include "base/basictypes.h" +#include "base/histogram.h" +#include "base/process.h" +#include "base/scoped_ptr.h" +#include "base/task.h" + +// This class gathers histogram data in the host browser process and +// serializes the data into a vector of strings to be uploaded to the +// Chrome browser process. It records the histogram data which has been +// logged and only uploads the delta with the next log. +// TODO(iyengar) +// This class does not contain any ChromeFrame specific stuff. It should +// be moved to base. +class ChromeFrameHistogramSnapshots { + public: + // Maintain a map of histogram names to the sample stats we've sent. + typedef std::map<std::string, Histogram::SampleSet> LoggedSampleMap; + typedef std::vector<std::string> HistogramPickledList; + + ChromeFrameHistogramSnapshots(); + ~ChromeFrameHistogramSnapshots() {} + + // Extract snapshot data and return it to be sent off to the Chrome browser + // process. + // Return only a delta to what we have already sent. + HistogramPickledList GatherAllHistograms(); + + private: + void GatherHistogram(const Histogram& histogram, + HistogramPickledList* histograms); + + void GatherHistogramDelta(const Histogram& histogram, + const Histogram::SampleSet& snapshot, + HistogramPickledList* histograms); + + // For histograms, record what we've already logged (as a sample for each + // histogram) so that we can send only the delta with the next log. + LoggedSampleMap logged_samples_; + + DISALLOW_COPY_AND_ASSIGN(ChromeFrameHistogramSnapshots); +}; + +#endif // CHROME_RENDERER_HISTOGRAM_SNAPSHOTS_H_ |