| 1 | #ifndef UST_BUFFER_H |
| 2 | #define UST_BUFFER_H |
| 3 | |
| 4 | /* Buffer offset macros */ |
| 5 | |
| 6 | /* |
| 7 | * BUFFER_TRUNC zeroes the subbuffer offset and the subbuffer number parts of |
| 8 | * the offset, which leaves only the buffer number. |
| 9 | */ |
| 10 | #define BUFFER_TRUNC(offset, chan) \ |
| 11 | ((offset) & (~((chan)->alloc_size-1))) |
| 12 | #define BUFFER_OFFSET(offset, chan) ((offset) & ((chan)->alloc_size - 1)) |
| 13 | #define SUBBUF_OFFSET(offset, chan) ((offset) & ((chan)->subbuf_size - 1)) |
| 14 | #define SUBBUF_ALIGN(offset, chan) \ |
| 15 | (((offset) + (chan)->subbuf_size) & (~((chan)->subbuf_size - 1))) |
| 16 | #define SUBBUF_TRUNC(offset, chan) \ |
| 17 | ((offset) & (~((chan)->subbuf_size - 1))) |
| 18 | #define SUBBUF_INDEX(offset, chan) \ |
| 19 | (BUFFER_OFFSET((offset), chan) >> (chan)->subbuf_size_order) |
| 20 | |
| 21 | |
| 22 | #endif /* UST_BUFFER_H */ |