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/*
* 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;
}
}
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