github.com/matrixorigin/matrixone@v1.2.0/pkg/common/reuse/mpool_based.go (about)

     1  // Copyright 2023 Matrix Origin
     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 reuse
    16  
    17  import (
    18  	"fmt"
    19  	"unsafe"
    20  
    21  	"github.com/matrixorigin/matrixone/pkg/common/mpool"
    22  )
    23  
    24  type mpoolBased[T ReusableObject] struct {
    25  	pool *mpool.MPool
    26  	opts *Options[T]
    27  	c    *checker[T]
    28  }
    29  
    30  func newMpoolBased[T ReusableObject](
    31  	capacity int64,
    32  	opts *Options[T]) Pool[T] {
    33  	opts.adjust()
    34  	var v T
    35  	c := newChecker[T](opts.enableChecker)
    36  	mp, err := mpool.NewMPool(fmt.Sprintf("reuse-%s", v.TypeName()), opts.memCapacity, 0)
    37  	if err != nil {
    38  		panic(err)
    39  	}
    40  	return &mpoolBased[T]{
    41  		pool: mp,
    42  		opts: opts,
    43  		c:    c,
    44  	}
    45  }
    46  
    47  func (p *mpoolBased[T]) Alloc() *T {
    48  	var t T
    49  	data, err := p.pool.Alloc(int(unsafe.Sizeof(t)))
    50  	if err != nil {
    51  		panic(err)
    52  	}
    53  	v := (*T)(unsafe.Pointer(unsafe.SliceData(data)))
    54  	p.c.created(v)
    55  	p.c.got(v)
    56  	return v
    57  }
    58  
    59  func (p *mpoolBased[T]) Free(v *T) {
    60  	p.c.free(v)
    61  	p.opts.release(v)
    62  	p.pool.Free(unsafe.Slice((*byte)(unsafe.Pointer(v)), unsafe.Sizeof(*v)))
    63  }