projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| c63539ff ML |
1 | .. |
| 2 | Copyright 1988-2022 Free Software Foundation, Inc. | |
| 3 | This is part of the GCC manual. | |
| 4 | For copying conditions, see the copyright.rst file. | |
| 5 | ||
| 6 | .. _acc_create: | |
| 7 | ||
| 8 | acc_create -- Allocate device memory and map it to host memory. | |
| 9 | *************************************************************** | |
| 10 | ||
| 11 | Description | |
| 12 | This function allocates device memory and maps it to host memory specified | |
| 13 | by the host address :samp:`{a}` with a length of :samp:`{len}` bytes. In C/C++, | |
| 14 | the function returns the device address of the allocated device memory. | |
| 15 | ||
| 16 | In Fortran, two (2) forms are supported. In the first form, :samp:`{a}` specifies | |
| 17 | a contiguous array section. The second form :samp:`{a}` specifies a variable or | |
| 18 | array element and :samp:`{len}` specifies the length in bytes. | |
| 19 | ||
| 20 | C/C++: | |
| 21 | .. list-table:: | |
| 22 | ||
| 23 | * - *Prototype*: | |
| 24 | - ``void *acc_create(h_void *a, size_t len);`` | |
| 25 | * - *Prototype*: | |
| 26 | - ``void *acc_create_async(h_void *a, size_t len, int async);`` | |
| 27 | ||
| 28 | Fortran: | |
| 29 | .. list-table:: | |
| 30 | ||
| 31 | * - *Interface*: | |
| 32 | - ``subroutine acc_create(a)`` | |
| 33 | * - | |
| 34 | - ``type, dimension(:[,:]...) :: a`` | |
| 35 | * - *Interface*: | |
| 36 | - ``subroutine acc_create(a, len)`` | |
| 37 | * - | |
| 38 | - ``type, dimension(:[,:]...) :: a`` | |
| 39 | * - | |
| 40 | - ``integer len`` | |
| 41 | * - *Interface*: | |
| 42 | - ``subroutine acc_create_async(a, async)`` | |
| 43 | * - | |
| 44 | - ``type, dimension(:[,:]...) :: a`` | |
| 45 | * - | |
| 46 | - ``integer(acc_handle_kind) :: async`` | |
| 47 | * - *Interface*: | |
| 48 | - ``subroutine acc_create_async(a, len, async)`` | |
| 49 | * - | |
| 50 | - ``type, dimension(:[,:]...) :: a`` | |
| 51 | * - | |
| 52 | - ``integer len`` | |
| 53 | * - | |
| 54 | - ``integer(acc_handle_kind) :: async`` | |
| 55 | ||
| 56 | Reference: | |
| 57 | :openacc:`2.6`, section | |
| 3ed1b4ce | 58 | 3.2.21. |