github.com/minio/minio@v0.0.0-20240328213742-3f72439b8a27/internal/disk/directio_darwin.go (about)

     1  //go:build darwin
     2  
     3  // Copyright (c) 2015-2023 MinIO, Inc.
     4  //
     5  // This file is part of MinIO Object Storage stack
     6  //
     7  // This program is free software: you can redistribute it and/or modify
     8  // it under the terms of the GNU Affero General Public License as published by
     9  // the Free Software Foundation, either version 3 of the License, or
    10  // (at your option) any later version.
    11  //
    12  // This program is distributed in the hope that it will be useful
    13  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    14  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    15  // GNU Affero General Public License for more details.
    16  //
    17  // You should have received a copy of the GNU Affero General Public License
    18  // along with this program.  If not, see <http://www.gnu.org/licenses/>.
    19  
    20  package disk
    21  
    22  import (
    23  	"os"
    24  
    25  	"github.com/ncw/directio"
    26  	"golang.org/x/sys/unix"
    27  )
    28  
    29  // ODirectPlatform indicates if the platform supports O_DIRECT
    30  const ODirectPlatform = true
    31  
    32  // OpenFileDirectIO - bypass kernel cache.
    33  func OpenFileDirectIO(filePath string, flag int, perm os.FileMode) (*os.File, error) {
    34  	return directio.OpenFile(filePath, flag, perm)
    35  }
    36  
    37  // DisableDirectIO - disables directio mode.
    38  func DisableDirectIO(f *os.File) error {
    39  	fd := f.Fd()
    40  	_, err := unix.FcntlInt(fd, unix.F_NOCACHE, 0)
    41  	return err
    42  }
    43  
    44  // AlignedBlock - pass through to directio implementation.
    45  func AlignedBlock(blockSize int) []byte {
    46  	return directio.AlignedBlock(blockSize)
    47  }