Page Speed Optimization Libraries  1.3.25.1
net/instaweb/util/public/null_shared_mem.h
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00001 // Copyright 2011 Google Inc.
00016 
00017 #ifndef NET_INSTAWEB_UTIL_PUBLIC_NULL_SHARED_MEM_H_
00018 #define NET_INSTAWEB_UTIL_PUBLIC_NULL_SHARED_MEM_H_
00019 
00020 #include <cstddef>
00021 #include "net/instaweb/util/public/abstract_shared_mem.h"
00022 #include "net/instaweb/util/public/basictypes.h"
00023 #include "net/instaweb/util/public/string.h"
00024 
00025 namespace net_instaweb {
00026 
00027 class MessageHandler;
00028 
00031 class NullSharedMem : public AbstractSharedMem {
00032  public:
00033   NullSharedMem();
00034   virtual ~NullSharedMem();
00035 
00036   virtual size_t SharedMutexSize() const;
00037 
00038   virtual AbstractSharedMemSegment* CreateSegment(
00039       const GoogleString& name, size_t size, MessageHandler* handler);
00040 
00043   virtual AbstractSharedMemSegment* AttachToSegment(
00044       const GoogleString& name, size_t size, MessageHandler* handler);
00045 
00046   virtual void DestroySegment(const GoogleString& name,
00047                               MessageHandler* handler);
00048 
00049  private:
00050   DISALLOW_COPY_AND_ASSIGN(NullSharedMem);
00051 };
00052 
00053 }  
00054 
00055 #endif  ///< NET_INSTAWEB_UTIL_PUBLIC_NULL_SHARED_MEM_H_
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