minio/pkg/disk/directio_darwin.go at master · zhus/minio

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* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

* http://www.apache.org/licenses/LICENSE-2.0

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

package disk

import (

"os"

"github.com/ncw/directio"

"golang.org/x/sys/unix"

)

// OpenFileDirectIO - bypass kernel cache.

func OpenFileDirectIO(filePath string, flag int, perm os.FileMode) (*os.File, error) {

return directio.OpenFile(filePath, flag, perm)

}

// DisableDirectIO - disables directio mode.

func DisableDirectIO(f *os.File) error {

fd := f.Fd()

_, err := unix.FcntlInt(fd, unix.F_NOCACHE, 0)

return err

}

// AlignedBlock - pass through to directio implementation.

func AlignedBlock(BlockSize int) []byte {

return directio.AlignedBlock(BlockSize)

}