mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-28 22:42:13 -05:00
98 lines
2.2 KiB
Go
98 lines
2.2 KiB
Go
// Copyright 2024 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package doctree
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import (
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"sync"
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radix "github.com/armon/go-radix"
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)
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// Tree is a radix tree that holds T.
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type Tree[T any] interface {
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Get(s string) T
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LongestPrefix(s string) (string, T)
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Insert(s string, v T) T
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WalkPrefix(lockType LockType, s string, f func(s string, v T) (bool, error)) error
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}
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// NewSimpleTree creates a new SimpleTree.
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func NewSimpleTree[T comparable]() *SimpleTree[T] {
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return &SimpleTree[T]{tree: radix.New()}
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}
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// SimpleTree is a thread safe radix tree that holds T.
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type SimpleTree[T comparable] struct {
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mu sync.RWMutex
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tree *radix.Tree
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zero T
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}
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func (tree *SimpleTree[T]) Get(s string) T {
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tree.mu.RLock()
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defer tree.mu.RUnlock()
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if v, ok := tree.tree.Get(s); ok {
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return v.(T)
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}
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return tree.zero
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}
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func (tree *SimpleTree[T]) LongestPrefix(s string) (string, T) {
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tree.mu.RLock()
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defer tree.mu.RUnlock()
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if s, v, ok := tree.tree.LongestPrefix(s); ok {
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return s, v.(T)
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}
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return "", tree.zero
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}
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func (tree *SimpleTree[T]) Insert(s string, v T) T {
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tree.mu.Lock()
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defer tree.mu.Unlock()
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tree.tree.Insert(s, v)
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return v
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}
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func (tree *SimpleTree[T]) Lock(lockType LockType) func() {
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switch lockType {
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case LockTypeNone:
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return func() {}
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case LockTypeRead:
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tree.mu.RLock()
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return tree.mu.RUnlock
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case LockTypeWrite:
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tree.mu.Lock()
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return tree.mu.Unlock
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}
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return func() {}
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}
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func (tree *SimpleTree[T]) WalkPrefix(lockType LockType, s string, f func(s string, v T) (bool, error)) error {
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commit := tree.Lock(lockType)
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defer commit()
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var err error
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tree.tree.WalkPrefix(s, func(s string, v any) bool {
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var b bool
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b, err = f(s, v.(T))
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if err != nil {
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return true
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}
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return b
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})
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return err
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}
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