github.com/alibaba/ilogtail/pkg@v0.0.0-20250526110833-c53b480d046c/helper/pool/pool_helper.go (about)

     1  // Copyright 2024 iLogtail Authors
     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 pool
    16  
    17  import (
    18  	"sync"
    19  )
    20  
    21  // GenericPool is a pool for *[]T
    22  type GenericPool[T any] struct {
    23  	sync.Pool
    24  }
    25  
    26  // NewGenericPool returns a GenericPool.
    27  // It accepts a function that returns a new []T. e.g., func() []byte {return make([]byte, 0, 128)}
    28  func NewGenericPool[T any](fn func() []T) GenericPool[T] {
    29  	return GenericPool[T]{
    30  		sync.Pool{
    31  			New: func() interface{} {
    32  				t := fn()
    33  				return &t
    34  			},
    35  		},
    36  	}
    37  }
    38  
    39  func (p *GenericPool[T]) Get() *[]T {
    40  	res := p.Pool.Get().(*[]T)
    41  	*res = (*res)[:0]
    42  	return res
    43  }
    44  
    45  func (p *GenericPool[T]) Put(t *[]T) {
    46  	if t != nil {
    47  		p.Pool.Put(t)
    48  	}
    49  }