vsldNewAbstractStream

Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

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ID 766686

Date 7/13/2023

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vsldNewAbstractStream

Creates and initializes an abstract random stream for double precision floating-point arrays.

Syntax

status = vsldnewabstractstream( stream, n, dbuf, a, b, dcallback )

Include Files

mkl.fi, mkl_vsl.f90

Input Parameters

Name	Type	Description
n	INTEGER, INTENT(IN)	Size of the array `dbuf`
dbuf	REAL(KIND=8), INTENT(IN)	Array of `n` double precision floating-point random numbers with uniform distribution over interval (`a`,`b`)
a	REAL(KIND=8), INTENT(IN)	Left boundary `a`
b	REAL(KIND=8), INTENT(IN)	Right boundary `b`
dcallback	See Note below	Address of the callback function used for update of the array `dbuf`

Output Parameters

Name	Type	Description
stream	TYPE(VSL_STREAM_STATE), INTENT(OUT)	Descriptor of the stream state structure

NOTE:

Format of the callback function in FORTRAN 77:

INTEGER FUNCTION DUPDATEFUNC( stream, n, dbuf, nmin, nmax, idx ) 
INTEGER*4 stream(2) 
INTEGER n 
DOUBLE PRECISION dbuf(n) 
INTEGER nmin 
INTEGER nmax 
INTEGER idx

Format of the callback function in Fortran 90:

INTEGER FUNCTION DUPDATEFUNC[C]( stream, n, dbuf, nmin, nmax, idx ) 
TYPE(VSL_STREAM_STATE),POINTER   :: stream[reference] 
INTEGER(KIND=4),INTENT(IN)       :: n[reference] 
REAL(KIND=8),INTENT(OUT)         :: dbuf[reference](0:n-1) 
INTEGER(KIND=4),INTENT(IN)       :: nmin[reference] 
INTEGER(KIND=4),INTENT(IN)       :: nmax[reference] 
INTEGER(KIND=4),INTENT(IN)       :: idx[reference]

The callback function returns the number of elements in the array actually updated by the function.Table dcallback Callback Function Parameters gives the description of the callback function parameters.

dcallback Callback Function Parameters
Parameters	Short Description
stream	Abstract random stream descriptor
n	Size of `dbuf`
dbuf	Array of random numbers associated with the stream `stream`
nmin	Minimal quantity of numbers to update
nmax	Maximal quantity of numbers that can be updated
idx	Position in cyclic buffer `dbuf` to start update `0≤idx<n`.

Description

The vsldNewAbstractStream function creates a new abstract stream for double precision floating-point arrays with random numbers of the uniform distribution over interval (a,b). The function associates the stream with a double precision array dbuf and your callback function dcallback that is intended for updating of dbuf content.

Return Values

VSL_ERROR_OK, VSL_STATUS_OK: Indicates no error, execution is successful.
VSL_ERROR_BADARGS: Parameter n is not positive.
VSL_ERROR_MEM_FAILURE: System cannot allocate memory for stream.
VSL_ERROR_NULL_PTR: Either buffer or callback function parameter is a NULL pointer.

Parent topic: Service Routines

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Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

vsldNewAbstractStream

Syntax

Include Files

Input Parameters

Output Parameters

Description

Return Values