void _flush_list(struct silopit *silopit, struct skipnode *x,struct skipnode *hdr,int flush_count)
{
int pos = 0;
int count = flush_count;
struct skipnode *cur = x;
struct skipnode *first = hdr;
struct jikukan *merge = NULL;
struct meta_node *meta_info = NULL;
while(cur != first) {
meta_info = meta_get(silopit->meta, cur->key);
if(!meta_info){
if(merge) {
struct skipnode *h = merge->hdr->forward[0];
_flush_merge_list(silopit, h, merge->count, NULL);
jikukan_free(merge);
merge = NULL;
}
_flush_new_list(silopit, x, count - pos);
return;
} else {
int cmp = strcmp(silopit->name, meta_info->index_name);
if(cmp == 0) {
if (!merge)
merge = _read_mmap(silopit,count);
jikukan_insert_node(merge, cur);
} else {
if (merge) {
struct skipnode *h = merge->hdr->forward[0];
_flush_merge_list(silopit, h, merge->count, meta_info);
jikukan_free(merge);
merge = NULL;
}
memset(silopit->name, 0, FILE_NAME_SIZE);
memcpy(silopit->name, meta_info->index_name, FILE_NAME_SIZE);
merge = _read_mmap(silopit, count);
jikukan_insert_node(merge, cur);
}
}
pos++;
cur = cur->forward[0];
}
if (merge) {
struct skipnode *h = merge->hdr->forward[0];
_flush_merge_list(silopit, h, merge->count, meta_info);
jikukan_free(merge);
}
}
void _flush_list(struct sst *sst, struct skipnode *x, struct skipnode *hdr, int flush_count)
{
int pos = 0;
int count = flush_count;
struct skipnode *cur = x;
struct skipnode *first = hdr;
struct skiplist *merge = NULL;
struct meta_node *meta_info = NULL;
while(cur != first) {
meta_info = meta_get(sst->meta, cur->key);
/* If m is NULL, cur->key more larger than meta's largest area
* need to create new index-file
*/
if(!meta_info) {
/* If merge is NULL, it has no merge */
if(merge) {
struct skipnode *h = merge->hdr->forward[0];
_flush_merge_list(sst, h, merge->count, NULL);
skiplist_free(merge);
merge = NULL;
}
/* Flush the last nodes to disk */
_flush_new_list(sst, x, count - pos);
return ;
} else {
/* If m is not NULL, means found the index of the cur
* We need:
* 1) compare the sst->name with meta index name
* a)If 0: add the cur to merge, and continue
* b)others:
* b1)Flush the merge list to disk
* b2)Open the meta's mmap, and load all blocks to new merge, add cur to merge
*/
int cmp = strcmp(sst->name, meta_info->index_name);
if(cmp == 0) {
if(!merge)
merge = _read_mmap(sst, count);
skiplist_insert_node(merge, cur);
} else {
if(merge) {
struct skipnode *h = merge->hdr->forward[0];
_flush_merge_list(sst, h, merge->count, meta_info);
skiplist_free(merge);
merge = NULL;
}
memset(sst->name, 0, FILE_NAME_SIZE);
memcpy(sst->name, meta_info->index_name, FILE_NAME_SIZE);
merge = _read_mmap(sst, count);
/* Add to merge list */
skiplist_insert_node(merge, cur);
}
}
pos++;
cur = cur->forward[0];
}
if(merge) {
struct skipnode *h = merge->hdr->forward[0];
_flush_merge_list(sst, h, merge->count, meta_info);
skiplist_free(merge);
}
}