GNU Radio 2.x: gr_head Class Reference

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# gr_head Class Reference
[Signal Processing Blocks]

`#include <gr_head.h>`

Inheritance diagram for gr_head:

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Collaboration diagram for gr_head:

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List of all members.

## Detailed Description

copies the first N items to the output then signals done

Useful for building test cases

## Public Member Functions
int | work (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
| just like gr_block::general_work, only this arranges to call consume_each for you
## Friends
gr_block_sptr | gr_make_head (size_t sizeof_stream_item, int nitems)

## Member Function Documentation

int gr_head::work | ( | int | noutput_items,
|  | gr_vector_const_void_star & | input_items,
|  | gr_vector_void_star & | output_items
| ) | `[virtual]`

| just like gr_block::general_work, only this arranges to call consume_each for you The user must override work to define the signal processing code Implements gr_sync_block.

## Friends And Related Function Documentation

gr_block_sptr gr_make_head | ( | size_t | sizeof_stream_item,
|  | int | nitems
| ) | `[friend]`

The documentation for this class was generated from the following files:

- gr_head.h
- gr_head.cc