net_instaweb::NullSharedMem Class Reference

#include "null_shared_mem.h"

Inheritance diagram for net_instaweb::NullSharedMem:

Public Member Functions
virtual size_t	SharedMutexSize () const
	Size of mutexes inside shared memory segments.
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)
virtual bool	IsDummy ()
	Does not actually support any operations.

Detailed Description

A stub implementation of shared memory for systems where we do not have a real one. Fails all the operations.

Member Function Documentation

virtual AbstractSharedMemSegment* net_instaweb::NullSharedMem::AttachToSegment ( const GoogleString &  name, size_t  size, MessageHandler *  handler  )

virtual

Attaches to an existing segment, which must have been created already. May return NULL on failure

Implements net_instaweb::AbstractSharedMem.

virtual AbstractSharedMemSegment* net_instaweb::NullSharedMem::CreateSegment ( const GoogleString &  name, size_t  size, MessageHandler *  handler  )

virtual

This should be called upon main process/thread initialization to create a shared memory segment that will be accessed by other processes/threads as identified by a unique name (via AttachToSegment). It will remove any previous segment with the same name. The memory will be zeroed out.

May return NULL on failure.

Implements net_instaweb::AbstractSharedMem.

virtual void net_instaweb::NullSharedMem::DestroySegment ( const GoogleString &  name, MessageHandler *  handler  )

virtual

Cleans up the segment with given name. You should call this after there is no longer any need for AttachToSegment to succeed.

Implements net_instaweb::AbstractSharedMem.

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The documentation for this class was generated from the following file:

• pagespeed/kernel/base/null_shared_mem.h