Pointer array

Functions for handling arrays of pointers. More...

Collaboration diagram for Pointer array:

Functions
TIEPIE_HW_API tiepie_hw_pointerarray	tiepie_hw_pointerarray_new (uint32_t length)
	Create a new pointer array. More...
TIEPIE_HW_API void	tiepie_hw_pointerarray_set (tiepie_hw_pointerarray ptr, uint32_t index, void *value)
	Set a pointer at a specified index in a specified pointer array. More...
TIEPIE_HW_API void	tiepie_hw_pointerarray_delete (tiepie_hw_pointerarray ptr)
	Delete an existing pointer array. More...

Detailed Description

Functions for handling arrays of pointers.

The function tiepie_hw_oscilloscope_get_data() uses a pointer to a buffer with pointers to buffers for the channel data. Not all programming/scripting languages can handle pointers to pointers properly. These functions can then be used to work around that issue.

Example

In pseudocode:

buffers = empty list/array
pointer_array = tiepie_hw_pointerarray_new(channel_count)
 
for i = 0 to channel_count - 1
  if tiepie_hw_oscilloscope_channel_get_enabled(handle, i)
    buffers[ i ] = allocate buffer/array
    tiepie_hw_pointerarray_set(pointer_array, i, pointer of buffers[ i ])
  end
end
 
tiepie_hw_oscilloscope_get_data(handle, pointer_array, channel_count, ...)
 
tiepie_hw_pointerarray_delete(pointer_array)

The data is now available in buffers.

See also

tiepie_hw_oscilloscope_get_data

Function Documentation

tiepie_hw_pointerarray_new()

TIEPIE_HW_API tiepie_hw_pointerarray tiepie_hw_pointerarray_new

(

uint32_t

length

)

Create a new pointer array.

The pointer array is initialized with NULL pointers.

Parameters

[in]

length

The requested length of the pointer array, 1 .. TIEPIE_HW_POINTER_ARRAY_MAX_LENGTH.

Returns

A pointer to the pointer array.

Status values

TIEPIE_HW_STATUS_INVALID_VALUE	The requested length is invalid.
TIEPIE_HW_STATUS_UNSUCCESSFUL
TIEPIE_HW_STATUS_SUCCESS

Since

1.0

tiepie_hw_pointerarray_set()

TIEPIE_HW_API void tiepie_hw_pointerarray_set	(	tiepie_hw_pointerarray	ptr,
		uint32_t	index,
		void *	value
	)

Set a pointer at a specified index in a specified pointer array.

Parameters

[in]	ptr	A pointer identifying the pointer array.
[in]	index	The requested array index.
[in]	value	The pointer value to set.

Status values

TIEPIE_HW_STATUS_UNSUCCESSFUL	The pointer to the array is invalid.
TIEPIE_HW_STATUS_SUCCESS

Since

1.0

tiepie_hw_pointerarray_delete()

TIEPIE_HW_API void tiepie_hw_pointerarray_delete

(

tiepie_hw_pointerarray

ptr

)

Delete an existing pointer array.

Parameters

[in]

ptr

A pointer identifying the pointer array.

Status values

TIEPIE_HW_STATUS_SUCCESS

Since

1.0