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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_BROWSER_TCMALLOC_INTERNALS_REQUEST_JOB_H_
      6 #define CONTENT_BROWSER_TCMALLOC_INTERNALS_REQUEST_JOB_H_
      7 
      8 #include <map>
      9 #include "base/basictypes.h"
     10 #include "base/memory/singleton.h"
     11 #include "base/process/process.h"
     12 #include "build/build_config.h"  // USE_TCMALLOC
     13 #include "net/url_request/url_request_simple_job.h"
     14 
     15 namespace content {
     16 
     17 class AboutTcmallocOutputs {
     18  public:
     19   // Returns the singleton instance.
     20   static AboutTcmallocOutputs* GetInstance();
     21 
     22   // Records the output for a specified header string.
     23   void SetOutput(const std::string& header, const std::string& output);
     24 
     25   void DumpToHTMLTable(std::string* data);
     26 
     27   // Callback for output returned from a child process.  Adds
     28   // the output for a canonical process-specific header string that
     29   // incorporates the pid.
     30   void OnStatsForChildProcess(base::ProcessId pid,
     31                               int process_type,
     32                               const std::string& output);
     33 
     34  private:
     35   AboutTcmallocOutputs();
     36   ~AboutTcmallocOutputs();
     37 
     38   // A map of header strings (e.g. "Browser", "Renderer PID 123")
     39   // to the tcmalloc output collected for each process.
     40   typedef std::map<std::string, std::string> AboutTcmallocOutputsType;
     41   AboutTcmallocOutputsType outputs_;
     42 
     43   friend struct DefaultSingletonTraits<AboutTcmallocOutputs>;
     44 
     45   DISALLOW_COPY_AND_ASSIGN(AboutTcmallocOutputs);
     46 };
     47 
     48 class TcmallocInternalsRequestJob : public net::URLRequestSimpleJob {
     49  public:
     50   TcmallocInternalsRequestJob(net::URLRequest* request,
     51                               net::NetworkDelegate* network_delegate);
     52 
     53   virtual int GetData(std::string* mime_type,
     54                       std::string* charset,
     55                       std::string* data,
     56                       const net::CompletionCallback& callback) const OVERRIDE;
     57 
     58  protected:
     59   virtual ~TcmallocInternalsRequestJob() {}
     60 
     61  private:
     62   DISALLOW_IMPLICIT_CONSTRUCTORS(TcmallocInternalsRequestJob);
     63 };
     64 
     65 }  // namespace content
     66 
     67 #endif  // CONTENT_BROWSER_TCMALLOC_INTERNALS_REQUEST_JOB_H_
     68