libgomp: acc_present_or_create
1
1 5.20 'acc_present_or_create' - If the data is not present on the device, allocate device memory and map it to host memory.
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1
1 _Description_
1 This function tests if the host data specifed by A and of length
1 LEN is present or not. If it is not present, then device memory
1 will be allocated and mapped to host memory. In C/C++, the device
1 address of the newly allocated device memory is returned.
1
1 In Fortran, two (2) forms are supported. In the first form, A
1 specifies a contiguous array section. The second form A specifies
1 a variable or array element and LEN specifies the length in bytes.
1
1 _C/C++_:
1 _Prototype_: 'void *acc_present_or_create(h_void *a, size_t len)'
1 _Prototype_: 'void *acc_pcreate(h_void *a, size_t len)'
1
1 _Fortran_:
1 _Interface_: 'subroutine acc_present_or_create(a)'
1 'type, dimension(:[,:]...) :: a'
1 _Interface_: 'subroutine acc_present_or_create(a, len)'
1 'type, dimension(:[,:]...) :: a'
1 'integer len'
1 _Interface_: 'subroutine acc_pcreate(a)'
1 'type, dimension(:[,:]...) :: a'
1 _Interface_: 'subroutine acc_pcreate(a, len)'
1 'type, dimension(:[,:]...) :: a'
1 'integer len'
1
1 _Reference_:
1 OpenACC specification v2.0 (https://www.openacc.org), section
1 3.2.20.
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