improve node subsys

+ More robust alignment and less memory usage for status, from enum to
  bit

2 files changed, 28 insertions, 0 deletions

diff --git a/include/apos/bits.h b/include/apos/bits.h
index 699cba4..ca25007 100644
--- a/include/apos/bits.h
+++ b/include/apos/bits.h
@@ -12,6 +12,30 @@
 #define __set_nbit(x, y)   (__set_bit((x), 1UL << (y)))
 #define __clear_nbit(x, y) (__clear_bit((x), 1UL << (y)))
 
+static inline bool bitmap_is_set(void *bmap, size_t n)
+{
+	uint8_t *bitmap = bmap;
+	size_t i = n / 8;
+	size_t r = n - (i * 8);
+	return __is_nset(bitmap[i], r);
+}
+
+static inline void bitmap_set(void *bmap, size_t n)
+{
+	uint8_t *bitmap = bmap;
+	size_t i = n / 8;
+	size_t r = n - (i * 8);
+	__set_nbit(bitmap[i], r);
+}
+
+static inline void bitmap_clear(void *bmap, size_t n)
+{
+	uint8_t *bitmap = bmap;
+	size_t i = n / 8;
+	size_t r = n - (i * 8);
+	__clear_nbit(bitmap[i], r);
+}
+
 uint16_t __bswap16(uint16_t u);
 uint32_t __bswap32(uint32_t u);
 uint64_t __bswap64(uint64_t u);
diff --git a/include/apos/nodes.h b/include/apos/nodes.h
index 80888e1..0780f75 100644
--- a/include/apos/nodes.h
+++ b/include/apos/nodes.h
@@ -16,6 +16,10 @@ struct node_region {
 
 struct node_root {
 	size_t node_size;
+	size_t max_nodes;
+
+	ptrdiff_t bitmap;
+	ptrdiff_t first_node;
 
 	struct node_region *head;
 	struct node_region *av_head;