pthread_shared_mem.h

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// Copyright 2011 Google Inc.

#ifndef PAGESPEED_KERNEL_THREAD_PTHREAD_SHARED_MEM_H_
#define PAGESPEED_KERNEL_THREAD_PTHREAD_SHARED_MEM_H_

#include <cstddef>
#include <map>
#include <utility>

#include "pagespeed/kernel/base/abstract_shared_mem.h"
#include "pagespeed/kernel/base/basictypes.h"
#include "pagespeed/kernel/base/string.h"

namespace net_instaweb {
class MessageHandler;

class PthreadSharedMem : public AbstractSharedMem {
 public:
  PthreadSharedMem();
  virtual ~PthreadSharedMem();

  virtual size_t SharedMutexSize() const;

  virtual AbstractSharedMemSegment* CreateSegment(
      const GoogleString& name, size_t size, MessageHandler* handler);

  virtual AbstractSharedMemSegment* AttachToSegment(
      const GoogleString& name, size_t size, MessageHandler* handler);

  virtual void DestroySegment(const GoogleString& name,
                              MessageHandler* handler);

  static void Terminate();

 private:
  typedef std::map<GoogleString, std::pair<char*, size_t> > SegmentBaseMap;

  static SegmentBaseMap* AcquireSegmentBases();

  static void UnlockSegmentBases();

  GoogleString PrefixSegmentName(const GoogleString& name);

  static SegmentBaseMap* segment_bases_;

  static size_t s_instance_count_;
  size_t instance_number_;

  
};

}  

#endif