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| author | Jim Blandy <jimb@codesourcery.com> | 2002-02-21 22:19:14 +0000 |
|---|---|---|
| committer | Jim Blandy <jimb@codesourcery.com> | 2002-02-21 22:19:14 +0000 |
| commit | 2bbcdae974b82d33df527a696aafd9bad5b99732 (patch) | |
| tree | 995fae0af4a8e18d53ce89a88d9636100e78be8f /include/splay-tree.h | |
| parent | 9abe5450465606a89c54e46263b023289c17b400 (diff) | |
| download | gdb-2bbcdae974b82d33df527a696aafd9bad5b99732.zip gdb-2bbcdae974b82d33df527a696aafd9bad5b99732.tar.gz gdb-2bbcdae974b82d33df527a696aafd9bad5b99732.tar.bz2 | |
include:
Allow the user to specify functions for allocating memory for
splay tree roots and nodes.
* splay-tree.h (splay_tree_allocate_fn, splay_tree_deallocate_fn):
New types.
(splay_tree): New fields: `allocate', `deallocate', and
`allocate_data'.
(splay_tree_new_with_allocator): New function declaration.
libiberty:
* splay-tree.c (splay_tree_xmalloc_allocate,
splay_tree_xmalloc_deallocate): New functions.
(splay_tree_new): Call splay_tree_new_with_allocator, passing the
above functions and a dummy data pointer.
(splay_tree_new_with_allocator): New function.
(splay_tree_delete_helper, splay_tree_delete, splay_tree_insert,
splay_tree_remove): Use the splay tree's allocation and
deallocation functions.
Diffstat (limited to 'include/splay-tree.h')
| -rw-r--r-- | include/splay-tree.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/splay-tree.h b/include/splay-tree.h index 6903969..4b7a7bf 100644 --- a/include/splay-tree.h +++ b/include/splay-tree.h @@ -61,6 +61,18 @@ typedef void (*splay_tree_delete_value_fn) PARAMS((splay_tree_value)); /* The type of a function used to iterate over the tree. */ typedef int (*splay_tree_foreach_fn) PARAMS((splay_tree_node, void*)); +/* The type of a function used to allocate memory for tree root and + node structures. The first argument is the number of bytes needed; + the second is a data pointer the splay tree functions pass through + to the allocator. This function must never return zero. */ +typedef void *(*splay_tree_allocate_fn) PARAMS((int, void *)); + +/* The type of a function used to free memory allocated using the + corresponding splay_tree_allocate_fn. The first argument is the + memory to be freed; the latter is a data pointer the splay tree + functions pass through to the freer. */ +typedef void (*splay_tree_deallocate_fn) PARAMS((void *, void *)); + /* The nodes in the splay tree. */ struct splay_tree_node_s { @@ -89,11 +101,24 @@ typedef struct splay_tree_s /* The deallocate-value function. NULL if no cleanup is necessary. */ splay_tree_delete_value_fn delete_value; + + /* Allocate/free functions, and a data pointer to pass to them. */ + splay_tree_allocate_fn allocate; + splay_tree_deallocate_fn deallocate; + void *allocate_data; + } *splay_tree; extern splay_tree splay_tree_new PARAMS((splay_tree_compare_fn, splay_tree_delete_key_fn, splay_tree_delete_value_fn)); +extern splay_tree splay_tree_new_with_allocator + PARAMS((splay_tree_compare_fn, + splay_tree_delete_key_fn, + splay_tree_delete_value_fn, + splay_tree_allocate_fn, + splay_tree_deallocate_fn, + void *)); extern void splay_tree_delete PARAMS((splay_tree)); extern splay_tree_node splay_tree_insert PARAMS((splay_tree, |