asdk-libdrm

    return -1;

}

​

int drmSLLookupNeighbors(void *l, unsigned long key,

             unsigned long *prev_key, void **prev_value,

             unsigned long *next_key, void **next_value)

{

    SkipListPtr   list = (SkipListPtr)l;

    SLEntryPtr    update[SL_MAX_LEVEL + 1];

    int           retcode = 0;

​

    *prev_key   = *next_key   = key;

    *prev_value = *next_value = NULL;

    if (update[0]) {

    *prev_key   = update[0]->key;

    *prev_value = update[0]->value;

    ++retcode;

    if (update[0]->forward[0]) {

        *next_key   = update[0]->forward[0]->key;

        *next_value = update[0]->forward[0]->value;