github.com/matrixorigin/matrixone@v1.2.0/pkg/common/buffer/types.go (about)

     1  // Copyright 2021 - 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 buffer
    16  
    17  import "sync"
    18  
    19  const (
    20  	FULL                   = 0x01 // indicates that a chunk doesn't have any space left
    21  	PointerSize            = 8
    22  	DefaultChunkBufferSize = 1 << 20
    23  )
    24  
    25  var ChunkSize int
    26  
    27  type chunk struct {
    28  	sync.Mutex
    29  	flag     uint32
    30  	off      uint32
    31  	numFree  uint64
    32  	numAlloc uint64
    33  	ptr      uintptr
    34  	data     []byte
    35  }
    36  
    37  type Buffer struct {
    38  	sync.Mutex
    39  	chunks []*chunk
    40  }