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-rw-r--r--src/avl.c184
1 files changed, 92 insertions, 92 deletions
diff --git a/src/avl.c b/src/avl.c
index fd4fb142..067b0b36 100644
--- a/src/avl.c
+++ b/src/avl.c
@@ -19,9 +19,6 @@
#include "avl.h"
#include "log.h"
-/* Private methods */
-int _avl_removeroot(avl_tree* t);
-
/* Swing to the left
* Warning: no balance maintainance
*/
@@ -69,7 +66,7 @@ void avl_nasty(avl* root) {
* returns 1 if the depth of the tree has grown
* Warning: do not insert elements already present
*/
-int _avl_insert(avl_tree* t, avl* a) {
+int avl_insert(avl_tree* t, avl* a) {
/* initialize */
a->left = 0;
a->right = 0;
@@ -86,7 +83,7 @@ int _avl_insert(avl_tree* t, avl* a) {
avl_tree left_subtree;
left_subtree.root = t->root->left;
left_subtree.compar = t->compar;
- if (_avl_insert(&left_subtree, a)) {
+ if (avl_insert(&left_subtree, a)) {
switch (t->root->balance--) {
case 1:
return 0;
@@ -117,7 +114,7 @@ int _avl_insert(avl_tree* t, avl* a) {
avl_tree right_subtree;
right_subtree.root = t->root->right;
right_subtree.compar = t->compar;
- if (_avl_insert(&right_subtree, a)) {
+ if (avl_insert(&right_subtree, a)) {
switch (t->root->balance++) {
case -1:
return 0;
@@ -144,36 +141,16 @@ int _avl_insert(avl_tree* t, avl* a) {
}
}
}
-int avl_insert(avl_tree* t, avl* a) {
-#ifndef AVL_WITHOUT_PTHREADS
-#ifdef AVL_LOCK_WITH_MUTEX
- pthread_mutex_lock(&t->mutex);
-#else
- pthread_rwlock_wrlock(&t->rwlock);
-#endif
-#endif /* AVL_WITHOUT_PTHREADS */
-
- int ret = _avl_insert(t, a);
-
-#ifndef AVL_WITHOUT_PTHREADS
-#ifdef AVL_LOCK_WITH_MUTEX
- pthread_mutex_unlock(&t->mutex);
-#else
- pthread_rwlock_unlock(&t->rwlock);
-#endif
-#endif /* AVL_WITHOUT_PTHREADS */
- return ret;
-}
/* Remove an element a from the AVL tree t
* returns -1 if the depth of the tree has shrunk
* Warning: if the element is not present in the tree,
* returns 0 as if it had been removed succesfully.
*/
-int _avl_remove(avl_tree* t, avl* a) {
+int avl_remove(avl_tree* t, avl* a) {
int b;
if (t->root == a)
- return _avl_removeroot(t);
+ return avl_removeroot(t);
b = t->compar(t->root, a);
if (b >= 0) {
/* remove from the left subtree */
@@ -181,7 +158,7 @@ int _avl_remove(avl_tree* t, avl* a) {
avl_tree left_subtree;
if ((left_subtree.root = t->root->left)) {
left_subtree.compar = t->compar;
- ch = _avl_remove(&left_subtree, a);
+ ch = avl_remove(&left_subtree, a);
t->root->left = left_subtree.root;
if (ch) {
switch (t->root->balance++) {
@@ -215,7 +192,7 @@ int _avl_remove(avl_tree* t, avl* a) {
avl_tree right_subtree;
if ((right_subtree.root = t->root->right)) {
right_subtree.compar = t->compar;
- ch = _avl_remove(&right_subtree, a);
+ ch = avl_remove(&right_subtree, a);
t->root->right = right_subtree.root;
if (ch) {
switch (t->root->balance--) {
@@ -246,31 +223,10 @@ int _avl_remove(avl_tree* t, avl* a) {
return 0;
}
-int avl_remove(avl_tree* t, avl* a) {
-#ifndef AVL_WITHOUT_PTHREADS
-#ifdef AVL_LOCK_WITH_MUTEX
- pthread_mutex_lock(&t->mutex);
-#else
- pthread_rwlock_wrlock(&t->rwlock);
-#endif
-#endif /* AVL_WITHOUT_PTHREADS */
-
- int ret = _avl_remove(t, a);
-
-#ifndef AVL_WITHOUT_PTHREADS
-#ifdef AVL_LOCK_WITH_MUTEX
- pthread_mutex_unlock(&t->mutex);
-#else
- pthread_rwlock_unlock(&t->rwlock);
-#endif
-#endif /* AVL_WITHOUT_PTHREADS */
- return ret;
-}
-
/* Remove the root of the AVL tree t
* Warning: dumps core if t is empty
*/
-int _avl_removeroot(avl_tree* t) {
+int avl_removeroot(avl_tree* t) {
int ch;
avl* a;
if (!t->root->left) {
@@ -296,7 +252,7 @@ int _avl_removeroot(avl_tree* t) {
while (a->left)
a = a->left;
}
- ch = _avl_remove(t, a);
+ ch = avl_remove(t, a);
a->left = t->root->left;
a->right = t->root->right;
a->balance = t->root->balance;
@@ -306,33 +262,12 @@ int _avl_removeroot(avl_tree* t) {
return 0;
}
-int avl_removeroot(avl_tree* t) {
-#ifndef AVL_WITHOUT_PTHREADS
-#ifdef AVL_LOCK_WITH_MUTEX
- pthread_mutex_lock(&t->mutex);
-#else
- pthread_rwlock_wrlock(&t->rwlock);
-#endif
-#endif /* AVL_WITHOUT_PTHREADS */
-
- int ret = _avl_removeroot(t);
-
-#ifndef AVL_WITHOUT_PTHREADS
-#ifdef AVL_LOCK_WITH_MUTEX
- pthread_mutex_unlock(&t->mutex);
-#else
- pthread_rwlock_unlock(&t->rwlock);
-#endif
-#endif /* AVL_WITHOUT_PTHREADS */
- return ret;
-}
-
/* Iterate through elements in t from a range between a and b (inclusive)
* for each element calls iter(a) until it returns 0
* returns the last value returned by iterator or 0 if there were no calls
* Warning: a<=b must hold
*/
-int _avl_range(avl_tree* t, avl* a, avl* b, int (*iter)(avl*), avl** ret) {
+int avl_range(avl_tree* t, avl* a, avl* b, int (*iter)(avl*), avl** ret) {
int x, c = 0;
if (!t->root)
return 0;
@@ -349,7 +284,7 @@ int _avl_range(avl_tree* t, avl* a, avl* b, int (*iter)(avl*), avl** ret) {
avl_tree left_subtree;
if ((left_subtree.root = t->root->left)) {
left_subtree.compar = t->compar;
- if (!(c = _avl_range(&left_subtree, a, b, iter, ret)))
+ if (!(c = avl_range(&left_subtree, a, b, iter, ret)))
if (x > 0)
return 0;
}
@@ -366,7 +301,7 @@ int _avl_range(avl_tree* t, avl* a, avl* b, int (*iter)(avl*), avl** ret) {
avl_tree right_subtree;
if ((right_subtree.root = t->root->right)) {
right_subtree.compar = t->compar;
- if (!(c = _avl_range(&right_subtree, a, b, iter, ret)))
+ if (!(c = avl_range(&right_subtree, a, b, iter, ret)))
if (x < 0)
return 0;
}
@@ -374,17 +309,57 @@ int _avl_range(avl_tree* t, avl* a, avl* b, int (*iter)(avl*), avl** ret) {
return c;
}
-int avl_range(avl_tree* t, avl* a, avl* b, int (*iter)(avl*), avl** ret) {
+/* high performance searching - by ktsaou */
+avl *avl_search(avl_tree *t, avl *a) {
+ avl *root = t->root;
+
+ while(root) {
+ int x = t->compar(root, a);
+
+ if(x > 0) {
+ root = root->left;
+ continue;
+ }
+
+ if(x < 0) {
+ root = root->right;
+ continue;
+ }
+
+ return root;
+ }
+
+ return NULL;
+}
+
+void avl_init(avl_tree *t, int (*compar)(void *a, void *b)) {
+ t->root = NULL;
+ t->compar = compar;
+}
+
+/* ------------------------------------------------------------------------- */
+
+void avl_read_lock(avl_tree_lock *t) {
#ifndef AVL_WITHOUT_PTHREADS
#ifdef AVL_LOCK_WITH_MUTEX
pthread_mutex_lock(&t->mutex);
#else
- pthread_rwlock_wrlock(&t->rwlock);
+ pthread_rwlock_rdlock(&t->rwlock);
#endif
#endif /* AVL_WITHOUT_PTHREADS */
+}
- int ret2 = _avl_range(t, a, b, iter, ret);
+void avl_write_lock(avl_tree_lock *t) {
+#ifndef AVL_WITHOUT_PTHREADS
+#ifdef AVL_LOCK_WITH_MUTEX
+ pthread_mutex_lock(&t->mutex);
+#else
+ pthread_rwlock_wrlock(&t->rwlock);
+#endif
+#endif /* AVL_WITHOUT_PTHREADS */
+}
+void avl_unlock(avl_tree_lock *t) {
#ifndef AVL_WITHOUT_PTHREADS
#ifdef AVL_LOCK_WITH_MUTEX
pthread_mutex_unlock(&t->mutex);
@@ -392,21 +367,12 @@ int avl_range(avl_tree* t, avl* a, avl* b, int (*iter)(avl*), avl** ret) {
pthread_rwlock_unlock(&t->rwlock);
#endif
#endif /* AVL_WITHOUT_PTHREADS */
-
- return ret2;
}
-/* Iterate through elements in t equal to a
- * for each element calls iter(a) until it returns 0
- * returns the last value returned by iterator or 0 if there were no calls
- */
-int avl_search(avl_tree* t, avl* a, int (*iter)(avl* a), avl** ret) {
- return avl_range(t, a, a, iter, ret);
-}
+/* ------------------------------------------------------------------------- */
-void avl_init(avl_tree* t, int (*compar)(void* a, void* b)) {
- t->root = NULL;
- t->compar = compar;
+void avl_init_lock(avl_tree_lock *t, int (*compar)(void *a, void *b)) {
+ avl_init(&t->avl_tree, compar);
#ifndef AVL_WITHOUT_PTHREADS
int lock;
@@ -421,5 +387,39 @@ void avl_init(avl_tree* t, int (*compar)(void* a, void* b)) {
fatal("Failed to initialize AVL mutex/rwlock, error: %d", lock);
#endif /* AVL_WITHOUT_PTHREADS */
+}
+
+avl *avl_search_lock(avl_tree_lock *t, avl *a) {
+ avl_read_lock(t);
+ avl *ret = avl_search(&t->avl_tree, a);
+ avl_unlock(t);
+ return ret;
+}
+
+int avl_range_lock(avl_tree_lock *t, avl *a, avl *b, int (*iter)(avl *), avl **ret) {
+ avl_read_lock(t);
+ int ret2 = avl_range(&t->avl_tree, a, b, iter, ret);
+ avl_unlock(t);
+ return ret2;
+}
+int avl_removeroot_lock(avl_tree_lock *t) {
+ avl_write_lock(t);
+ int ret = avl_removeroot(&t->avl_tree);
+ avl_unlock(t);
+ return ret;
+}
+
+int avl_remove_lock(avl_tree_lock *t, avl *a) {
+ avl_write_lock(t);
+ int ret = avl_remove(&t->avl_tree, a);
+ avl_unlock(t);
+ return ret;
+}
+
+int avl_insert_lock(avl_tree_lock *t, avl *a) {
+ avl_write_lock(t);
+ int ret = avl_insert(&t->avl_tree, a);
+ avl_unlock(t);
+ return ret;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 12:44:30 +0000