Function entry

examples/cov.c:118–141

* Entry point. */

 * Entry point.
 */
void entry(const void *bb, const void *next)
{
    uintptr_t to   = (uintptr_t)next;
    uintptr_t from = (uintptr_t)bb;
    to = bb_lookup(to);
    ENTRY key = {from, to, 0};  

    if (!LOCK())
        return;

    void *node   = tfind(&key, &COV, compare);
    ENTRY *entry = (node != NULL? *(ENTRY **)node: NULL);
    if (entry == NULL)
    {
        entry = (ENTRY *)malloc(sizeof(ENTRY));
        if (entry == NULL)
            error("failed to allocate memory: %s", strerror(errno));
        memcpy(entry, &key, sizeof(ENTRY));
        (void)tsearch(entry, &COV, compare);
    }
    entry->count++;

    UNLOCK();
}

/*
 * Init.