github.com/aacfactory/fns@v1.2.85/commons/window/times.go (about)

     1  /*
     2   * Copyright 2023 Wang Min Xiang
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   * 	http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   *
    16   */
    17  
    18  package window
    19  
    20  import (
    21  	"sync/atomic"
    22  	"time"
    23  )
    24  
    25  func NewTimes(win time.Duration) *Times {
    26  	return &Times{
    27  		n:        0,
    28  		window:   win,
    29  		deadline: time.Now().Truncate(win),
    30  	}
    31  }
    32  
    33  type Times struct {
    34  	n        int64
    35  	window   time.Duration
    36  	deadline time.Time
    37  }
    38  
    39  func (times *Times) Incr() int64 {
    40  	if times.deadline.Before(time.Now()) {
    41  		times.deadline = time.Now().Truncate(times.window)
    42  		atomic.StoreInt64(&times.n, 1)
    43  		return 1
    44  	}
    45  	return atomic.AddInt64(&times.n, 1)
    46  }
    47  
    48  func (times *Times) Decr() int64 {
    49  	if times.deadline.Before(time.Now()) {
    50  		times.deadline = time.Now().Truncate(times.window)
    51  		atomic.StoreInt64(&times.n, 0)
    52  		return 0
    53  	}
    54  	return atomic.AddInt64(&times.n, -1)
    55  }
    56  
    57  func (times *Times) Value() int64 {
    58  	return atomic.LoadInt64(&times.n)
    59  }