github.com/matrixorigin/matrixone@v1.2.0/pkg/fileservice/memorycache/data_alloc_free.go (about)

     1  // Copyright 2022 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 memorycache
    16  
    17  import (
    18  	"sync/atomic"
    19  	"unsafe"
    20  
    21  	"github.com/matrixorigin/matrixone/pkg/common/malloc"
    22  )
    23  
    24  func newData(size int, counter *atomic.Int64) *Data {
    25  	if size == 0 {
    26  		return nil
    27  	}
    28  	counter.Add(int64(size))
    29  	data := &Data{
    30  		size: size,
    31  	}
    32  	ptr, handle := malloc.Alloc(size)
    33  	data.bufHandle = handle
    34  	data.buf = unsafe.Slice((*byte)(ptr), size)
    35  	data.ref.init(1)
    36  	return data
    37  }
    38  
    39  func (d *Data) free(counter *atomic.Int64) {
    40  	counter.Add(-int64(d.size))
    41  	d.buf = nil
    42  	d.bufHandle.Free()
    43  }