AMPS::MMapStoreBuffer Class Reference

A Buffer implementation that uses a memory mapped file as its storage. More...

#include <MMapStoreBuffer.hpp>

Inheritance diagram for AMPS::MMapStoreBuffer:

Public Member Functions
	MMapStoreBuffer (const std::string &fileName_)
	Create an MMapStoreBuffer using fileName_ as the name of the memory mapped file used for storage. More...
virtual void	setSize (size_t newSize_)
	Set the size for the buffer. More...
Public Member Functions inherited from AMPS::MemoryStoreBuffer
virtual size_t	getSize () const
	Get the current size of the Buffer in bytes. More...
virtual size_t	getPosition () const
	Get the current position in the buffer. More...
virtual void	setPosition (size_t position_)
	Set the buffer postion to a location. More...
virtual void	putByte (char byte_)
	Put a byte into the buffer at the current position and advance. More...
virtual char	getByte ()
	Get the next byte from the buffer and advance. More...
virtual void	putSizet (size_t s_)
	Put a size_t value into the buffer at the current position and advance past it. More...
virtual size_t	getSizet ()
	Get a size_t value at the current buffer position and advance past it. More...
virtual void	putInt32 (amps_int32_t s_)
	Put a 32-bit int value into the buffer and advance past it. More...
virtual amps_int32_t	getInt32 ()
	Get the 32-bit int value at the current buffer position and advance past it. More...
virtual void	putUint32 (amps_uint32_t s_)
	Put an unsigned 32-bit int value into the buffer at the current position and advance past the end of it. More...
virtual amps_uint32_t	getUint32 ()
	Get the unsigned 32-bit int value at the current buffer position and advance past it. More...
virtual void	putInt64 (amps_int64_t s_)
	Put an amps_int64_t value into the buffer at the current position and advance past it. More...
virtual amps_int64_t	getInt64 ()
	Get a 64-bit int value at the current buffer position and advance past it. More...
virtual void	putUint64 (amps_uint64_t s_)
	Put an amps_uint64_t value into the buffer at the current position and advance past it. More...
virtual amps_uint64_t	getUint64 ()
	Get an unsigned 64-bit int value at the current buffer position and advance past it. More...
virtual void	putBytes (const char *data_, size_t dataLength_)
	Put the given length of bytes in data into the buffer at the current position and advance past them. More...
virtual void	putBytes (const Buffer::ByteArray &bytes_)
	Put the given bytes into the buffer at the current position and advance past them. More...
virtual Buffer::ByteArray	getBytes (size_t numBytes_)
	Get the given number of bytes from the buffer. More...
virtual void	copyBytes (char *buffer_, size_t numBytes_)
	Copy the given number of bytes from this buffer to the given buffer. More...
virtual void	zero (size_t offset_, size_t length_)
	Set the given number of bytes in the buffer to zero starting at the given position. More...
virtual void	copyBytes (size_t destination_, size_t source_, size_t number_)
	Move the given number of bytes at the given location to the new location Buffer should do this in the most optimal fashion. More...

Detailed Description

A Buffer implementation that uses a memory mapped file as its storage.

Constructor & Destructor Documentation

AMPS::MMapStoreBuffer::MMapStoreBuffer ( const std::string &  fileName_ )

inline

Create an MMapStoreBuffer using fileName_ as the name of the memory mapped file used for storage.

If the file exists and contains valid messages, they will be available for replay.

Parameters

fileName_

The name of the file mapped to memory.

Member Function Documentation

virtual void AMPS::MMapStoreBuffer::setSize ( size_t  newSize_ )

inlinevirtual

Set the size for the buffer.

Parameters

newSize_

The new size in bytes for the buffer.

Reimplemented from AMPS::MemoryStoreBuffer.

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

• include/amps/MMapStoreBuffer.hpp