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43 lines
685 B
Go
43 lines
685 B
Go
package collection
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import "sync"
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type Queue struct {
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queueList []interface{}
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mutex sync.Mutex
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}
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func NewFifoQueue() *Queue {
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return &Queue{}
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}
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func (q *Queue) Push(item interface{}) {
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q.mutex.Lock()
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defer q.mutex.Unlock()
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if q.queueList == nil {
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q.queueList = []interface{}{}
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}
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q.queueList = append(q.queueList, item)
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}
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func (q *Queue) Pop() interface{} {
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q.mutex.Lock()
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defer q.mutex.Unlock()
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if q.queueList == nil {
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q.queueList = []interface{}{}
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}
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if len(q.queueList) == 0 {
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return nil
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}
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item := q.queueList[0]
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q.queueList = q.queueList[1:]
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return item
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}
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func (q *Queue) Length() int {
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q.mutex.Lock()
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defer q.mutex.Unlock()
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return len(q.queueList)
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}
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