| 1 | Linux Trace Toolkit |
| 2 | |
| 3 | Mathieu Desnoyers 18-05-2004 |
| 4 | |
| 5 | |
| 6 | Seeing that a very precise hook call ordering is needed when processing events |
| 7 | (especially the order for calling state update hooks and event delivery hooks), |
| 8 | this document defines a new type and interface that permits to merge all kind of |
| 9 | hooks, eventually sorted by the priority associated to them. |
| 10 | |
| 11 | - Type LttvHooks with priorities |
| 12 | |
| 13 | This is a modification to the actual LttvHooks that associates a priority with |
| 14 | each hook. The container for this type would be a garray, just like hook.c, but |
| 15 | hooks would be added at the right position in the list, by priority. Hooks in a |
| 16 | hook list are ordered by priority : from highest priority (0) to |
| 17 | lowest (99). The default priority is 50 (defined as LTTV_PRIO_DEFAULT). |
| 18 | |
| 19 | A new lttv_hooks_call_merge that will get the hooks from two hook lists in the |
| 20 | right order will deal with the multiple lists priority problem. |
| 21 | |
| 22 | |
| 23 | |
| 24 | |