Open (and close) SIONlib files from multiple OpenMP threads in parallel. More...

Typedefs
typedef struct sion_omp_options	sion_omp_options
	Holds non-essential arguments for `sion_paropen_omp()`. More...

Functions
int	sion_paropen_omp (const char filename, sion_open_mode mode, const sion_omp_options options)
	Open a SIONlib file from multiple OpenMP threads. More...

int	sion_parclose_omp (int sid)
	closes a SIONlib file previously opened in OpenMP mode More...

sion_omp_options *	sion_omp_options_new ()
	Allocates and initializes an instance of `sion_omp_options` More...

void	sion_omp_options_delete (sion_omp_options *options)
	Delete an instance of `sion_omp_options` More...

void	sion_omp_options_set_chunksize (sion_omp_options *options, int64_t chunksize)
	Set the chunk size of a logical file in the container. More...

void	sion_omp_options_set_fsblksize (sion_omp_options *options, int32_t fsblksize)
	Set the file system block size to assume. More...

void	sion_omp_options_set_keyval_mode (sion_omp_options *options, sion_keyval_mode keyval_mode)
	Set the key-value mode to use for a container. More...

void	sion_omp_options_set_collective (sion_omp_options *options)
	Enable collective I/O. More...

void	sion_omp_options_set_collective_size (sion_omp_options *options, int32_t size)
	Enable collective I/O. More...

void	sion_omp_options_set_collective_merge (sion_omp_options *options)
	Use collective merging. More...

void	sion_omp_options_set_lowlevel_api (sion_omp_options *options, sion_lowlevel_api lowlevel_api)
	Set the low-level API to use for opening a container. More...

void	sion_omp_options_set_endianness (sion_omp_options *options, sion_endianness endianness)
	Set the endianness for the contents of a container. More...

Detailed Description

Open (and close) SIONlib files from multiple OpenMP threads in parallel.

Typedef Documentation

◆ sion_omp_options

typedef struct sion_omp_options sion_omp_options

Holds non-essential arguments for sion_paropen_omp().

These are:

the sizes of chunks for the logical file opened by this task,
the size of a file system block to assume,
whether and in what mode to use SIONlib's key-value mechanism,
whether to use collective I/O,
what low-level API to use for file system access,
the endianness of user data in the file.

Definition at line 37 of file sion_omp.h.

Function Documentation

◆ sion_omp_options_delete()

void sion_omp_options_delete ( sion_omp_options * options )

Delete an instance of sion_omp_options

Parameters

[in] options a pointer to the instance to delete

Definition at line 81 of file sion_omp_gen.c.

◆ sion_omp_options_new()

sion_omp_options* sion_omp_options_new ( )

Allocates and initializes an instance of sion_omp_options

Returns: a pointer to the new instance or NULL if allocation failed

Definition at line 72 of file sion_omp_gen.c.

◆ sion_omp_options_set_chunksize()

void sion_omp_options_set_chunksize	(	sion_omp_options *	options,
		int64_t	chunksize
	)

Set the chunk size of a logical file in the container.

Parameters

[in,out]	options	an options object
[in]	chunksize	chunk sizes for the logical file opened by this process

Definition at line 86 of file sion_omp_gen.c.

References sion_generic_options_set_chunksize().

◆ sion_omp_options_set_collective()

void sion_omp_options_set_collective ( sion_omp_options * options )

Enable collective I/O.

The size of collector groups will be determined via heuristics.

See also: Collective API

Parameters

[in] options an options object

Definition at line 101 of file sion_omp_gen.c.

References sion_omp_options_set_collective_size().

◆ sion_omp_options_set_collective_merge()

void sion_omp_options_set_collective_merge ( sion_omp_options * options )

Use collective merging.

See also: Collective API

Parameters

[in] options an options object

Definition at line 111 of file sion_omp_gen.c.

References sion_generic_options_set_collective_merge().

◆ sion_omp_options_set_collective_size()

void sion_omp_options_set_collective_size	(	sion_omp_options *	options,
		int32_t	size
	)

Enable collective I/O.

See also: Collective API

Parameters

[in]	options	an options object
[in]	size	size of the collector groups

Definition at line 106 of file sion_omp_gen.c.

References sion_generic_options_set_collective_size().

Referenced by sion_omp_options_set_collective().

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◆ sion_omp_options_set_endianness()

void sion_omp_options_set_endianness	(	sion_omp_options *	options,
		sion_endianness	endianness
	)

Set the endianness for the contents of a container.

Parameters

[in,out]	options	an options object
[in]	endianness	the endianness of the contents

Definition at line 121 of file sion_omp_gen.c.

References sion_generic_options_set_endianness().

◆ sion_omp_options_set_fsblksize()

void sion_omp_options_set_fsblksize	(	sion_omp_options *	options,
		int32_t	fsblksize
	)

Set the file system block size to assume.

Parameters

[in,out]	options	an options object
[in]	fsblksize	the file system block size

Definition at line 91 of file sion_omp_gen.c.

References sion_generic_options_set_fsblksize().

◆ sion_omp_options_set_keyval_mode()

void sion_omp_options_set_keyval_mode	(	sion_omp_options *	options,
		sion_keyval_mode	keyval_mode
	)

Set the key-value mode to use for a container.

Parameters

[in,out]	options	an options object
[in]	keyval_mode	the key-value mode to use

Definition at line 96 of file sion_omp_gen.c.

References sion_generic_options_set_keyval_mode().

◆ sion_omp_options_set_lowlevel_api()

void sion_omp_options_set_lowlevel_api	(	sion_omp_options *	options,
		sion_lowlevel_api	lowlevel_api
	)

Set the low-level API to use for opening a container.

Parameters

[in,out]	options	an options object
[in]	lowlevel_api	the low-level API to use

Definition at line 116 of file sion_omp_gen.c.

References sion_generic_options_set_lowlevel_api().

◆ sion_parclose_omp()

int sion_parclose_omp ( int sid )

closes a SIONlib file previously opened in OpenMP mode

Parameters

[in] sid SIONlib file id

Returns: success value (SION_SUCCESS or SION_NOT_SUCCESS)

Definition at line 46 of file sion_omp_gen.c.

◆ sion_paropen_omp()

int sion_paropen_omp	(	const char *	filename,
		sion_open_mode	mode,
		const sion_omp_options *	options
	)

Open a SIONlib file from multiple OpenMP threads.

This function opens a distinct logical file in a SIONlib container for each OpenMP thread that calls it.

Parameters

[in]	filename	name of file, should be equal on all threads
[in]	mode	whether to open the file for reading or writing
[in]	options	additional options, or `NULL`

Returns: a SIONlib file handle or -1 if an error occurred

Definition at line 126 of file sion_omp_gen.c.

References sion_lock_register_lock_callbacks().

Typedefs

Functions

Detailed Description

Typedef Documentation

◆ sion_omp_options

Function Documentation

◆ sion_omp_options_delete()

◆ sion_omp_options_new()

◆ sion_omp_options_set_chunksize()

◆ sion_omp_options_set_collective()

◆ sion_omp_options_set_collective_merge()

◆ sion_omp_options_set_collective_size()

◆ sion_omp_options_set_endianness()

◆ sion_omp_options_set_fsblksize()

◆ sion_omp_options_set_keyval_mode()

◆ sion_omp_options_set_lowlevel_api()

◆ sion_parclose_omp()

◆ sion_paropen_omp()