storj.io/minio@v0.0.0-20230509071714-0cbc90f649b1/pkg/disk/directio_darwin.go (about)

     1  /*
     2   * Minio Cloud Storage, (C) 2019-2020 Minio, Inc.
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package disk
    18  
    19  import (
    20  	"os"
    21  
    22  	"github.com/ncw/directio"
    23  	"golang.org/x/sys/unix"
    24  )
    25  
    26  // OpenFileDirectIO - bypass kernel cache.
    27  func OpenFileDirectIO(filePath string, flag int, perm os.FileMode) (*os.File, error) {
    28  	return directio.OpenFile(filePath, flag, perm)
    29  }
    30  
    31  // DisableDirectIO - disables directio mode.
    32  func DisableDirectIO(f *os.File) error {
    33  	fd := f.Fd()
    34  	_, err := unix.FcntlInt(fd, unix.F_NOCACHE, 0)
    35  	return err
    36  }
    37  
    38  // AlignedBlock - pass through to directio implementation.
    39  func AlignedBlock(BlockSize int) []byte {
    40  	return directio.AlignedBlock(BlockSize)
    41  }