o2::framework::PreallocatedOutputStream Class Reference

#include <EmptyFragment.h>

Inherits arrow::io::OutputStream.

Public Member Functions
	PreallocatedOutputStream (std::vector< size_t > &sizes, const std::shared_ptr< arrow::ResizableBuffer > &buffer)
	~PreallocatedOutputStream () override=default
arrow::Status	Close () override
	Close the stream, preserving the buffer (retrieve it with Finish()).
bool	closed () const override
arrow::Result< int64_t >	Tell () const override
arrow::Status	Write (const void *data, int64_t nbytes) override
arrow::Result< std::shared_ptr< arrow::Buffer > >	Finish ()
	Close the stream and return the buffer.
arrow::Status	Reset (std::vector< size_t > sizes, int64_t initial_capacity, arrow::MemoryPool *pool)
	Initialize state of OutputStream with newly allocated memory and set position to 0.
int64_t	capacity () const

Static Public Member Functions
static arrow::Result< std::shared_ptr< PreallocatedOutputStream > >	Create (std::vector< size_t > &sizes, int64_t initial_capacity=4096, arrow::MemoryPool *pool=arrow::default_memory_pool())
	Create in-memory output stream with indicated capacity using a memory pool.

Detailed Description

An OutputStream which does the reading of the input buffers directly on writing, if needed. Each deferred operation is encoded in the source buffer by an incremental number which can be used to lookup in the ops vector the operation to perform.

Definition at line 54 of file EmptyFragment.h.

Constructor & Destructor Documentation

PreallocatedOutputStream()

o2::framework::PreallocatedOutputStream::PreallocatedOutputStream ( std::vector< size_t > &  sizes, const std::shared_ptr< arrow::ResizableBuffer > &  buffer  )

explicit

Definition at line 58 of file EmptyFragment.cxx.

~PreallocatedOutputStream()

o2::framework::PreallocatedOutputStream::~PreallocatedOutputStream ( )

overridedefault

Member Function Documentation

capacity()

int64_t o2::framework::PreallocatedOutputStream::capacity ( ) const

inline

Definition at line 99 of file EmptyFragment.h.

Close()

arrow::Status o2::framework::PreallocatedOutputStream::Close ( )

override

Close the stream, preserving the buffer (retrieve it with Finish()).

Definition at line 89 of file EmptyFragment.cxx.

closed()

bool o2::framework::PreallocatedOutputStream::closed ( ) const

override

Definition at line 100 of file EmptyFragment.cxx.

Create()

arrow::Result< std::shared_ptr< PreallocatedOutputStream > > o2::framework::PreallocatedOutputStream::Create ( std::vector< size_t > &  sizes, int64_t  initial_capacity = 4096, arrow::MemoryPool *  pool = arrow::default_memory_pool()  )

static

Create in-memory output stream with indicated capacity using a memory pool.

Parameters

[in]	initial_capacity	the initial allocated internal capacity of the OutputStream
[in,out]	pool	a MemoryPool to use for allocations

Returns

the created stream

Definition at line 67 of file EmptyFragment.cxx.

Finish()

arrow::Result< std::shared_ptr< arrow::Buffer > > o2::framework::PreallocatedOutputStream::Finish

(

)

Close the stream and return the buffer.

Definition at line 102 of file EmptyFragment.cxx.

Reset()

arrow::Status o2::framework::PreallocatedOutputStream::Reset	(	std::vector< size_t >	sizes,
		int64_t	initial_capacity,
		arrow::MemoryPool *	pool
	)

Initialize state of OutputStream with newly allocated memory and set position to 0.

Parameters

[in]	initial_capacity	the starting allocated capacity
[in,out]	pool	the memory pool to use for allocations

Returns

Status

Definition at line 77 of file EmptyFragment.cxx.

Tell()

arrow::Result< int64_t > o2::framework::PreallocatedOutputStream::Tell ( ) const

override

Definition at line 110 of file EmptyFragment.cxx.

Write()

arrow::Status o2::framework::PreallocatedOutputStream::Write ( const void *  data, int64_t  nbytes  )

override

Definition at line 112 of file EmptyFragment.cxx.

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

• /home/runner/work/AliceO2/AliceO2/Framework/Core/include/Framework/EmptyFragment.h
• /home/runner/work/AliceO2/AliceO2/Framework/Core/src/EmptyFragment.cxx