github.com/zuoyebang/bitalosdb@v1.1.1-0.20240516111551-79a8c4d8ce20/bitree/bdb/bdb_openbsd.go (about)

     1  // Copyright 2021 The Bitalosdb author(hustxrb@163.com) and other contributors.
     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 bdb
    16  
    17  import (
    18  	"syscall"
    19  	"unsafe"
    20  )
    21  
    22  const (
    23  	msAsync = 1 << iota
    24  	msSync
    25  	msInvalidate
    26  )
    27  
    28  func msync(db *DB) error {
    29  	_, _, errno := syscall.Syscall(syscall.SYS_MSYNC, uintptr(unsafe.Pointer(db.data)), uintptr(db.datasz), msInvalidate)
    30  	if errno != 0 {
    31  		return errno
    32  	}
    33  	return nil
    34  }
    35  
    36  func fdatasync(db *DB) error {
    37  	if db.data != nil {
    38  		return msync(db)
    39  	}
    40  	return db.file.Sync()
    41  }