diff options
| author | David Lamparter <equinox@opensourcerouting.org> | 2017-08-08 09:00:28 +0200 |
|---|---|---|
| committer | David Lamparter <equinox@opensourcerouting.org> | 2017-08-15 13:25:41 +0200 |
| commit | 08c4c73be6073282e73a9d7074212df39e27aa5c (patch) | |
| tree | 250d8c9e53322475e88dc0d8d61db22c3874bcec /lib/hook.c | |
| parent | 865f5bb8cb3baa2c8df576c6cd0af3d489e97b5f (diff) | |
lib: hooks: support priority ordering & reversing
Allow registering callbacks with a priority value used to order them
relative to each other. Plus a reverse variant that just flips the
direction on priorities.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
Diffstat (limited to 'lib/hook.c')
| -rw-r--r-- | lib/hook.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/lib/hook.c b/lib/hook.c index 2c877cbf45..1468c4d329 100644 --- a/lib/hook.c +++ b/lib/hook.c @@ -26,17 +26,25 @@ DEFINE_MTYPE_STATIC(LIB, HOOK_ENTRY, "Hook entry") void _hook_register(struct hook *hook, void *funcptr, void *arg, bool has_arg, - struct frrmod_runtime *module, const char *funcname) + struct frrmod_runtime *module, const char *funcname, + int priority) { - struct hookent *he = XCALLOC(MTYPE_HOOK_ENTRY, sizeof(*he)); + struct hookent *he = XCALLOC(MTYPE_HOOK_ENTRY, sizeof(*he)), **pos; he->hookfn = funcptr; he->hookarg = arg; he->has_arg = has_arg; he->module = module; he->fnname = funcname; + he->priority = priority; - he->next = hook->entries; - hook->entries = he; + for (pos = &hook->entries; *pos; pos = &(*pos)->next) + if (hook->reverse + ? (*pos)->priority < priority + : (*pos)->priority >= priority) + break; + + he->next = *pos; + *pos = he; } void _hook_unregister(struct hook *hook, void *funcptr, void *arg, bool has_arg) |