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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:53:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:53:30 +0000 |
commit | 2c7cac91ed6e7db0f6937923d2b57f97dbdbc337 (patch) | |
tree | c05dc0f8e6aa3accc84e3e5cffc933ed94941383 /lib/hook.c | |
parent | Initial commit. (diff) | |
download | frr-upstream.tar.xz frr-upstream.zip |
Adding upstream version 8.4.4.upstream/8.4.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/hook.c')
-rw-r--r-- | lib/hook.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/lib/hook.c b/lib/hook.c new file mode 100644 index 0000000..895243a --- /dev/null +++ b/lib/hook.c @@ -0,0 +1,71 @@ +/* + * Copyright (c) 2016 David Lamparter, for NetDEF, Inc. + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <string.h> + +#include "memory.h" +#include "hook.h" + +DEFINE_MTYPE_STATIC(LIB, HOOK_ENTRY, "Hook entry"); + +void _hook_register(struct hook *hook, struct hookent *stackent, void *funcptr, + void *arg, bool has_arg, struct frrmod_runtime *module, + const char *funcname, int priority) +{ + struct hookent *he, **pos; + + if (!stackent->ent_used) + he = stackent; + else { + he = XCALLOC(MTYPE_HOOK_ENTRY, sizeof(*he)); + he->ent_on_heap = true; + } + he->ent_used = true; + he->hookfn = funcptr; + he->hookarg = arg; + he->has_arg = has_arg; + he->module = module; + he->fnname = funcname; + he->priority = priority; + + 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) +{ + struct hookent *he, **prev; + + for (prev = &hook->entries; (he = *prev) != NULL; prev = &he->next) + if (he->hookfn == funcptr && he->hookarg == arg + && he->has_arg == has_arg) { + *prev = he->next; + if (he->ent_on_heap) + XFREE(MTYPE_HOOK_ENTRY, he); + else + memset(he, 0, sizeof(*he)); + break; + } +} |