bool remove_from_bst(BST *tree, int item) {
Node **found_node = find_node(tree, item);
// We don't do anything of the value is not in the tree.
if (found_node == NULL) {
return false;
}
Node *left_node = (*found_node)->left;
Node *right_node = (*found_node)->right;
if (left_node != NULL) {
// We replace the root with the largest node in the left subtree.
Node **pointer_to_largest = get_largest_node(&((*found_node)->left));
Node *largest = *pointer_to_largest;
assert(largest->right == NULL);
// We replace the largest element with whatever was in its left subtree.
*pointer_to_largest = largest->left;
// Set the children of the replacement node.
if (largest != left_node) {
largest->left = left_node;
}
largest->right = right_node;
// free the memory for the old root.
free(*found_node);
// Set the parent of the root to point to the new root.
*found_node = largest;
} else if (right_node != NULL) {
// We replace the root with the smallest node in the right subtree.
Node **pointer_to_smallest = get_smallest_node(&((*found_node)->right));
Node *smallest = *pointer_to_smallest;
assert(smallest->left == NULL);
// We replace the smallest element with whatever was in its left subtree.
*pointer_to_smallest = smallest->right;
// Set the children of the replacement node.
if (smallest != right_node) {
smallest->right = right_node;
}
smallest->left = left_node;
// free the memory for the old root.
free(*found_node);
// Set the parent of the root to point to the new root.
*found_node = smallest;
} else { // Both left and right are NULL.
free(*found_node);
*found_node = NULL;
}
tree->size--;
return true;
}
void *schedule_function( void *ptr )
{
char *filename, *request_type, *con_type, *readBuf = NULL;
char *str1;
FILE* fp1;
size_t read;
char *data;
int sock;
int fsize;
Node * temp;
data=malloc(sizeof(char)*200);
memset(data,0,sizeof(char)*200);
sleep(t);
while(1)
{
pthread_mutex_lock(&lock1);
if(abcd->head!=NULL)
{
if(SJF==1)
{
temp = get_smallest_node();
}
else
{
temp = get_first();
}
add_to_sec(temp);
pthread_mutex_unlock(&lock1);
}
else
{
pthread_mutex_unlock(&lock1);
}
}
}
int get_smallest_in_bst(BST *tree) {
assert(tree != NULL);
assert(tree->size != 0);
return ((*get_smallest_node(&tree->root))->value);
}