github.com/vanus-labs/vanus/lib@v0.0.0-20231221070800-1334a7b9605e/sync/map.go (about)

     1  // Copyright 2022 Linkall Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package sync
    16  
    17  import (
    18  	"sync"
    19  )
    20  
    21  func MapLen(m *sync.Map) int {
    22  	if m == nil {
    23  		return 0
    24  	}
    25  	c := 0
    26  	m.Range(func(key, value interface{}) bool {
    27  		c++
    28  		return true
    29  	})
    30  	return c
    31  }