github.com/m3db/m3@v1.5.0/src/metrics/aggregation/types_pool.go (about)

     1  // Copyright (c) 2017 Uber Technologies, Inc.
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    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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    19  // THE SOFTWARE.
    20  
    21  package aggregation
    22  
    23  import "github.com/m3db/m3/src/x/pool"
    24  
    25  // TypesAlloc allocates new aggregation types.
    26  type TypesAlloc func() Types
    27  
    28  // TypesPool provides a pool of aggregation types.
    29  type TypesPool interface {
    30  	// Init initializes the aggregation types pool.
    31  	Init(alloc TypesAlloc)
    32  
    33  	// Get gets an empty list of aggregation types from the pool.
    34  	Get() Types
    35  
    36  	// Put returns aggregation types to the pool.
    37  	Put(value Types)
    38  }
    39  
    40  type typesPool struct {
    41  	pool pool.ObjectPool
    42  }
    43  
    44  // NewTypesPool creates a new pool for aggregation types.
    45  func NewTypesPool(opts pool.ObjectPoolOptions) TypesPool {
    46  	return &typesPool{pool: pool.NewObjectPool(opts)}
    47  }
    48  
    49  func (p *typesPool) Init(alloc TypesAlloc) {
    50  	p.pool.Init(func() interface{} {
    51  		return alloc()
    52  	})
    53  }
    54  
    55  func (p *typesPool) Get() Types {
    56  	return p.pool.Get().(Types)
    57  }
    58  
    59  func (p *typesPool) Put(value Types) {
    60  	p.pool.Put(value[:0])
    61  }