/*
* Free a memory block owned by a given cookie.
* Run some corruption checks.
*/
void
olsr_cookie_free(struct olsr_cookie_info *ci, void *ptr)
{
struct olsr_cookie_mem_brand *branding;
struct list_node *free_list_node;
#ifdef OLSR_COOKIE_DEBUG
bool reuse = false;
#endif
branding = (struct olsr_cookie_mem_brand *)ARM_NOWARN_ALIGN(((unsigned char *)ptr + ci->ci_size));
/*
* Verify if there has been a memory overrun, or
* the wrong owner is trying to free this.
*/
assert(!memcmp(&branding->cmb_sig, "cookie", 6) && branding->cmb_id == ci->ci_id);
/* Kill the brand */
memset(branding, 0, sizeof(*branding));
/*
* Rather than freeing the memory right away, try to reuse at a later
* point. Keep at least ten percent of the active used blocks or at least
* ten blocks on the free list.
*/
if ((ci->ci_free_list_usage < COOKIE_FREE_LIST_THRESHOLD) || (ci->ci_free_list_usage < ci->ci_usage / COOKIE_FREE_LIST_THRESHOLD)) {
free_list_node = (struct list_node *)ptr;
list_node_init(free_list_node);
list_add_before(&ci->ci_free_list, free_list_node);
ci->ci_free_list_usage++;
#ifdef OLSR_COOKIE_DEBUG
reuse = true;
#endif
} else {
/*
* No interest in reusing memory.
*/
free(ptr);
}
/* Stats keeping */
olsr_cookie_usage_decr(ci->ci_id);
#ifdef OLSR_COOKIE_DEBUG
OLSR_PRINTF(1, "MEMORY: free %s, %p, %u bytes%s\n", ci->ci_name, ptr, ci->ci_size, reuse ? ", reuse" : "");
#endif
}
/**
* Delete a timer.
*
* @param the timer_entry that shall be removed
* @return nada
*/
void
olsr_stop_timer(struct timer_entry *timer)
{
/* It's okay to get a NULL here */
if (!timer) {
return;
}
assert(timer->timer_cookie); /* we want timer cookies everywhere */
OLSR_PRINTF(7, "TIMER: stop %s timer %p, ctx %p\n",
timer->timer_cookie->ci_name, timer, timer->timer_cb_context);
/*
* Carve out of the existing wheel_slot and free.
*/
list_remove(&timer->timer_list);
timer->timer_flags &= ~OLSR_TIMER_RUNNING;
olsr_cookie_usage_decr(timer->timer_cookie->ci_id);
olsr_cookie_free(timer_mem_cookie, timer);
}
