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// +build windows
package backend
import (
"github.com/chrislusf/seaweedfs/weed/storage/backend/memory_map"
"golang.org/x/sys/windows"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/storage/backend/memory_map/os_overloads"
)
func CreateVolumeFile(fileName string, preallocate int64, memoryMapSizeMB uint32) (BackendStorageFile, error) {
if preallocate > 0 {
glog.V(0).Infof("Preallocated disk space for %s is not supported", fileName)
}
if memoryMapSizeMB > 0 {
file, e := os_overloads.OpenFile(fileName, windows.O_RDWR|windows.O_CREAT, 0644, true)
if e != nil {
return nil, e
}
return memory_map.NewMemoryMappedFile(file, memoryMapSizeMB), nil
} else {
file, e := os_overloads.OpenFile(fileName, windows.O_RDWR|windows.O_CREAT|windows.O_TRUNC, 0644, false)
if e != nil {
return nil, e
}
return NewDiskFile(file), nil
}
}
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