github.com/matrixorigin/matrixone@v1.2.0/pkg/fileservice/fifocache/shard.go (about)

     1  // Copyright 2024 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 fifocache
    16  
    17  import (
    18  	"unsafe"
    19  
    20  	"github.com/cespare/xxhash/v2"
    21  	"golang.org/x/exp/constraints"
    22  )
    23  
    24  func ShardInt[T constraints.Integer](v T) uint8 {
    25  	return uint8(xxhash.Sum64(
    26  		unsafe.Slice(
    27  			(*byte)(unsafe.Pointer(&v)),
    28  			unsafe.Sizeof(v),
    29  		),
    30  	))
    31  }