[rtp_rtcp] SSRCDatabase class cleaned (including all lint errors)

webrtc/modules/rtp_rtcp/source/ssrc_database.h

 /*
  *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_SSRC_DATABASE_H_
 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_SSRC_DATABASE_H_
 
-#include <map>
+#include <set>
 
+#include "webrtc/base/random.h"
+#include "webrtc/base/scoped_ptr.h"
 #include "webrtc/system_wrappers/include/static_instance.h"
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
 class CriticalSectionWrapper;
 
 class SSRCDatabase {
  public:
   static SSRCDatabase* GetSSRCDatabase();
   static void ReturnSSRCDatabase();
 
   uint32_t CreateSSRC();
-  int32_t RegisterSSRC(const uint32_t ssrc);
-  int32_t ReturnSSRC(const uint32_t ssrc);
+  void RegisterSSRC(uint32_t ssrc);
+  void ReturnSSRC(uint32_t ssrc);
 
  protected:
   SSRCDatabase();
   virtual ~SSRCDatabase();
 
   static SSRCDatabase* CreateInstance() { return new SSRCDatabase(); }
 
  private:
   // Friend function to allow the SSRC destructor to be accessed from the
   // template class.
   friend SSRCDatabase* GetStaticInstance<SSRCDatabase>(
       CountOperation count_operation);
-  static SSRCDatabase* StaticInstance(CountOperation count_operation);
 
-  uint32_t GenerateRandom();
-
-  std::map<uint32_t, uint32_t> _ssrcMap;
-
-  CriticalSectionWrapper* _critSect;
+  rtc::scoped_ptr<CriticalSectionWrapper> crit_;
+  Random random_ GUARDED_BY(crit_);
+  std::set<uint32_t> ssrcs_ GUARDED_BY(crit_);
 };
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_SSRC_DATABASE_H_