Implementation of a Ringbuffer to store chunks of data.
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Implementation of a Ringbuffer to store chunks of data.
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#define | CONFIG_CHUNK_NUM_MAX (4) |
| | The maximum number of chunks that can be stored in a Chunked Ringbuffer.
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| void | crb_init (chunk_ringbuf_t *rb, void *buffer, size_t len) |
| | Initialize a Chunked Ringbuffer. More...
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| unsigned | crb_end_chunk (chunk_ringbuf_t *rb, bool valid) |
| | Close the current chunk. More...
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| static bool | crb_start_chunk (chunk_ringbuf_t *rb) |
| | Start a new chunk on the ringbuffer. More...
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| static bool | crb_add_byte (chunk_ringbuf_t *rb, uint8_t b) |
| | Insert a byte into the current chunk. More...
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| bool | crb_add_bytes (chunk_ringbuf_t *rb, const void *data, size_t len) |
| | Insert a number of bytes into the current chunk. More...
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| bool | crb_add_chunk (chunk_ringbuf_t *rb, const void *data, size_t len) |
| | Add a complete chunk to the Ringbuffer. More...
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| bool | crb_get_chunk_size (chunk_ringbuf_t *rb, size_t *len) |
| | Get the size of the first valid chunk. More...
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| bool | crb_peek_bytes (chunk_ringbuf_t *rb, void *dst, size_t offset, size_t len) |
| | Get a number of bytes from the first valid chunk without consuming it. More...
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| bool | crb_consume_chunk (chunk_ringbuf_t *rb, void *dst, size_t len) |
| | Remove a chunk from the valid chunk array. More...
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| bool | crb_chunk_foreach (chunk_ringbuf_t *rb, crb_foreach_callback_t func, void *ctx) |
| | Execute a callback for each byte in the first valid chunk The callback function may be called twice if the chunk is non-continuous. More...
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◆ crb_foreach_callback_t
| typedef void(* crb_foreach_callback_t) (void *ctx, uint8_t *bytes, size_t len) |
◆ crb_add_byte()
Insert a byte into the current chunk.
- Note
- This function is expected to be called in ISR context / with interrupts disabled.
- Precondition
- A new chunk has been started with crb_start_chunk
- Parameters
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| [in] | rb | The Ringbuffer to work on |
| [in] | b | The byte to write |
- Returns
- true If the byte could be written
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false If the ringbuffer is full
Definition at line 137 of file chunked_ringbuffer.h.
◆ crb_add_bytes()
Insert a number of bytes into the current chunk.
- Note
- This function is expected to be called in ISR context / with interrupts disabled.
- Precondition
- A new chunk has been started with crb_start_chunk
- Parameters
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| [in] | rb | The Ringbuffer to work on |
| [in] | data | The data to write |
| [in] | len | Size of data |
- Returns
- true If the bytes could be written
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false If the ringbuffer is full
◆ crb_add_chunk()
Add a complete chunk to the Ringbuffer.
- Note
- This function is expected to be called in ISR context / with interrupts disabled.
This is a convenience function that combines crb_start_chunk, crb_add_bytes and crb_end_chunk
- Parameters
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| [in] | rb | The Ringbuffer to work on |
| [in] | data | The data to write |
| [in] | len | Size of data |
- Returns
- true If the chunk could be added to the valid chunk array
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false There was not enough space and the chunk was discarded
◆ crb_chunk_foreach()
Execute a callback for each byte in the first valid chunk The callback function may be called twice if the chunk is non-continuous.
This function will not consume the chunk.
- Parameters
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| [in] | rb | The Ringbuffer to work on |
| [in] | func | The function to call for each byte |
| [in] | ctx | Optional function argument |
- Returns
- true If a valid chunk exits on which the function was executed
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false If no valid chunk exists
◆ crb_consume_chunk()
Remove a chunk from the valid chunk array.
- Parameters
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| [in] | rb | The Ringbuffer to work on |
| [out] | dst | Destination where the chunk contents should be copied to. May be NULL, then the chunk is just discarded. |
| [in] | len | Max number of bytes to read. If there are bytes left in the chunk beyond that, they will be discarded |
- Returns
- true If a chunk was consumed
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false If no valid chunk did exist
◆ crb_end_chunk()
Close the current chunk.
- Note
- This function is expected to be called in ISR context / with interrupts disabled.
- Parameters
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| [in] | rb | The Ringbuffer to work on |
| [in] | valid | True if the chunk is valid and should be stored False if the current chunk should be discarded |
- Returns
- size of chunk if the chunk could be stored in the valid chunk array
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0 if there is no more space in the valid chunk array
◆ crb_get_chunk_size()
Get the size of the first valid chunk.
- Parameters
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| [in] | rb | The Ringbuffer to work on |
| [out] | len | Pointer to store the size of the first valid chunk |
- Returns
- true If a valid chunk exists and
size was written
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false If no valid chunk exists
◆ crb_init()
Initialize a Chunked Ringbuffer.
- Parameters
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| [in] | rb | The Ringbuffer to work on |
| buffer | The Ringbuffer work area |
| len | Size of the Ringbuffer work area |
◆ crb_peek_bytes()
| bool crb_peek_bytes |
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chunk_ringbuf_t * |
rb, |
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void * |
dst, |
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size_t |
offset, |
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size_t |
len |
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Get a number of bytes from the first valid chunk without consuming it.
- Parameters
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| [in] | rb | The Ringbuffer to work on |
| [out] | dst | Destination buffer |
| [in] | offset | Offset to the start of the chunk |
| [in] | len | Number of bytes to read |
- Returns
- true If the data could be read
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false If no valid chunk exists or the bytes could not be read
◆ crb_start_chunk()
Start a new chunk on the ringbuffer.
If an unfinished chunk already exists, it will be discarded.
- Note
- This function is expected to be called in ISR context / with interrupts disabled.
- Parameters
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| [in] | rb | The Ringbuffer to work on |
- Returns
- true If a new chunk could be started
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false If the ringbuffer is full
Definition at line 102 of file chunked_ringbuffer.h.
1.9.1