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| author | Michael Hope <michael.hope@linaro.org> | 2010-10-10 20:07:34 +1300 |
|---|---|---|
| committer | Michael Hope <michael.hope@linaro.org> | 2010-10-10 20:07:34 +1300 |
| commit | c925e6c219e6ae29ac724ff7c2dc17872d2a64c3 (patch) | |
| tree | 095e5710e60794b9bf7aa3143bca6cfd467e30e1 /libmaple/ring_buffer.h | |
| parent | 0ed51a1b7bd35102099e5c27f042b27631649f0b (diff) | |
| download | librambutan-c925e6c219e6ae29ac724ff7c2dc17872d2a64c3.tar.gz librambutan-c925e6c219e6ae29ac724ff7c2dc17872d2a64c3.zip | |
Changed the ring_buffer indexes to uint16 to cut memory usage and increase capacity. Sorted struct members by size to improve the packing.
Diffstat (limited to 'libmaple/ring_buffer.h')
| -rw-r--r-- | libmaple/ring_buffer.h | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/libmaple/ring_buffer.h b/libmaple/ring_buffer.h index 9628005..b4c136f 100644 --- a/libmaple/ring_buffer.h +++ b/libmaple/ring_buffer.h @@ -14,14 +14,14 @@ extern "C"{ * The total buffer size must be a power of two * One byte is left free to distinguish empty from full */ typedef struct ring_buffer { + /** Buffer items are stored into */ + volatile uint8 *buf; /** Index of the next item to remove */ - volatile uint32 head; + volatile uint16 head; /** Index where the next item will get inserted */ - volatile uint32 tail; + volatile uint16 tail; /** Buffer capacity */ - uint8 size; - /** Buffer items are stored into */ - volatile uint8 *buf; + uint16 size; } ring_buffer; /** Initialise a ring buffer. |