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authorFred Bauer <fred.w.bauer@gmail.com>2011-10-21 20:23:21 +0000
committerFred Bauer <fred.w.bauer@gmail.com>2011-10-21 20:23:21 +0000
commit6f078c428fb0135ec7a1b53ee8bf7f91576fae65 (patch)
tree76d04eb5a354f0d69831bfb48ec661c2e4eecaf3 /firmware/lru.c
parentc032b9d083b521dbf4bab86d4b1a756f05dd7a30 (diff)
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Change lru from double to single linked list. Only the font cache uses LRU and it never searches in reverse. Saves 2 bytes per glyph.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30818 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/lru.c')
-rw-r--r--firmware/lru.c10
1 files changed, 0 insertions, 10 deletions
diff --git a/firmware/lru.c b/firmware/lru.c
index 798e09fb31..5e1561e492 100644
--- a/firmware/lru.c
+++ b/firmware/lru.c
@@ -48,11 +48,9 @@ void lru_create(struct lru* pl, void *buf, short size, short data_size)
for (i=0; i<pl->_size; i++)
{
lru_node_p(pl, i)->_next = i + 1;
- lru_node_p(pl, i)->_prev = i - 1;
}
/* Fix up head and tail to form circular buffer */
- lru_node_p(pl, 0)->_prev = pl->_tail;
lru_node_p(pl, pl->_tail)->_next = pl->_head;
}
@@ -92,20 +90,12 @@ void lru_touch(struct lru* pl, short handle)
/* Remove current node from linked list */
struct lru_node* curr_node = lru_node_p(pl, handle);
- struct lru_node* prev_node = lru_node_p(pl, curr_node->_prev);
- struct lru_node* next_node = lru_node_p(pl, curr_node->_next);
-
- prev_node->_next = curr_node->_next;
- next_node->_prev = curr_node->_prev;
/* insert current node at tail */
struct lru_node* tail_node = lru_node_p(pl, pl->_tail);
short tail_node_next_handle = tail_node->_next; /* Bug fix */
- struct lru_node* tail_node_next = lru_node_p(pl, tail_node_next_handle); /* Bug fix */
curr_node->_next = tail_node->_next;
- curr_node->_prev = pl->_tail;
- tail_node_next->_prev = handle; /* Bug fix */
tail_node->_next = handle;
pl->_tail = handle;