[llvm-commits] CVS: llvm-poolalloc/runtime/BoundsCheckAllocator/splay.h

[Dinakar Dhurjati]

Changes in directory llvm-poolalloc/runtime/BoundsCheckAllocator:

splay.h added (r1.1)
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Log message:

*** empty log message ***

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Diffs of the changes:  (+48 -0)

 splay.h |   48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 48 insertions(+)


Index: llvm-poolalloc/runtime/BoundsCheckAllocator/splay.h
diff -c /dev/null llvm-poolalloc/runtime/BoundsCheckAllocator/splay.h:1.1
*** /dev/null	Thu Dec 22 10:46:56 2005
--- llvm-poolalloc/runtime/BoundsCheckAllocator/splay.h	Thu Dec 22 10:46:46 2005
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*** 0 ****
--- 1,48 ----
+ // Note: This file is obtained from
+ // http://www.cs.utk.edu/~cs140/spring-2005/notes/Splay/
+ // FIXME: This may not be the most efficient version of splay implementation
+ // This may be updated with a different splay implementation in near future
+ #ifndef _SPLAY_
+ #define SPLAY
+ 
+ typedef unsigned long Jval ;
+ 
+ /* Node identities */
+ 
+ #define SPLAY_SENTINEL 0
+ #define SPLAY_OTHER 1
+ 
+ typedef struct splay {
+   Jval key;
+   Jval val;
+   int is_sentinel;
+   struct splay *left;
+   struct splay *right;
+   struct splay *flink;
+   struct splay *blink;
+   struct splay *parent;
+ } Splay;
+ 
+ extern "C" {
+  Splay *new_splay();
+  void free_splay(Splay *);
+  Splay *splay_insert_ptr(Splay *tree, unsigned long key, Jval val);
+  Splay *splay_find_ptr(Splay *tree, unsigned long key);
+  Splay *splay_find_gte_ptr(Splay *tree, unsigned long key, int *found);
+ 
+  Splay *splay_root(Splay *tree);
+  Splay *splay_first(Splay *tree);
+  Splay *splay_last(Splay *tree);
+  Splay *splay_next(Splay *node);
+  Splay *splay_prev(Splay *node);
+  Splay *splay_nil(Splay *tree);
+ 
+  void splay_delete_node(Splay *node);
+ };
+ 
+ #define splay_traverse(ptr, list) \
+   for (ptr = splay_first(list); ptr != splay_nil(list); ptr = splay_next(ptr))
+ #define splay_rtraverse(ptr, list) \
+   for (ptr = splay_last(list); ptr != splay_nil(list); ptr = splay_prev(ptr))
+ 
+ #endif