mirror of
https://github.com/MetaCubeX/mihomo.git
synced 2024-11-16 19:56:51 +08:00
74 lines
1.2 KiB
Go
74 lines
1.2 KiB
Go
package queue
|
|
|
|
import (
|
|
"sync"
|
|
|
|
"github.com/samber/lo"
|
|
)
|
|
|
|
// Queue is a simple concurrent safe queue
|
|
type Queue[T any] struct {
|
|
items []T
|
|
lock sync.RWMutex
|
|
}
|
|
|
|
// Put add the item to the queue.
|
|
func (q *Queue[T]) Put(items ...T) {
|
|
if len(items) == 0 {
|
|
return
|
|
}
|
|
|
|
q.lock.Lock()
|
|
q.items = append(q.items, items...)
|
|
q.lock.Unlock()
|
|
}
|
|
|
|
// Pop returns the head of items.
|
|
func (q *Queue[T]) Pop() T {
|
|
if len(q.items) == 0 {
|
|
return lo.Empty[T]()
|
|
}
|
|
|
|
q.lock.Lock()
|
|
head := q.items[0]
|
|
q.items = q.items[1:]
|
|
q.lock.Unlock()
|
|
return head
|
|
}
|
|
|
|
// Last returns the last of item.
|
|
func (q *Queue[T]) Last() T {
|
|
if len(q.items) == 0 {
|
|
return lo.Empty[T]()
|
|
}
|
|
|
|
q.lock.RLock()
|
|
last := q.items[len(q.items)-1]
|
|
q.lock.RUnlock()
|
|
return last
|
|
}
|
|
|
|
// Copy get the copy of queue.
|
|
func (q *Queue[T]) Copy() []T {
|
|
items := []T{}
|
|
q.lock.RLock()
|
|
items = append(items, q.items...)
|
|
q.lock.RUnlock()
|
|
return items
|
|
}
|
|
|
|
// Len returns the number of items in this queue.
|
|
func (q *Queue[T]) Len() int64 {
|
|
q.lock.RLock()
|
|
defer q.lock.RUnlock()
|
|
|
|
return int64(len(q.items))
|
|
}
|
|
|
|
// New is a constructor for a new concurrent safe queue.
|
|
func New[T any](hint int64) *Queue[T] {
|
|
return &Queue[T]{
|
|
items: make([]T, 0, hint),
|
|
}
|
|
}
|