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57 lines
1018 B
57 lines
1018 B
// +build windows
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package osfs
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import (
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"os"
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"runtime"
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"unsafe"
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"golang.org/x/sys/windows"
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)
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type fileInfo struct {
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os.FileInfo
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name string
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}
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func (fi *fileInfo) Name() string {
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return fi.name
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}
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var (
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kernel32DLL = windows.NewLazySystemDLL("kernel32.dll")
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lockFileExProc = kernel32DLL.NewProc("LockFileEx")
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unlockFileProc = kernel32DLL.NewProc("UnlockFile")
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)
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const (
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lockfileExclusiveLock = 0x2
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)
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func (f *file) Lock() error {
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f.m.Lock()
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defer f.m.Unlock()
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var overlapped windows.Overlapped
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// err is always non-nil as per sys/windows semantics.
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ret, _, err := lockFileExProc.Call(f.File.Fd(), lockfileExclusiveLock, 0, 0xFFFFFFFF, 0,
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uintptr(unsafe.Pointer(&overlapped)))
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runtime.KeepAlive(&overlapped)
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if ret == 0 {
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return err
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}
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return nil
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}
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func (f *file) Unlock() error {
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f.m.Lock()
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defer f.m.Unlock()
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// err is always non-nil as per sys/windows semantics.
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ret, _, err := unlockFileProc.Call(f.File.Fd(), 0, 0, 0xFFFFFFFF, 0)
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if ret == 0 {
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return err
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}
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return nil
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}
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