lease_windows.go RawHistoryFolder

1//go:build windows
2
3package subagents
4
5import (
6	"errors"
7
8	"golang.org/x/sys/windows"
9)
10
11func acquireAgentLease(stateDir string) (*agentLease, error) {
12	file, err := openAgentLeaseFile(stateDir)
13	if err != nil {
14		return nil, err
15	}
16	flags := uint32(windows.LOCKFILE_EXCLUSIVE_LOCK | windows.LOCKFILE_FAIL_IMMEDIATELY)
17	var overlapped windows.Overlapped
18	if err := windows.LockFileEx(windows.Handle(file.Fd()), flags, 0, 1, 0, &overlapped); err != nil {
19		_ = file.Close()
20		if errors.Is(err, windows.ERROR_LOCK_VIOLATION) {
21			return nil, ErrAgentLeaseHeld
22		}
23		return nil, err
24	}
25	return &agentLease{file: file}, nil
26}
27
28func (l *agentLease) Close() error {
29	if l == nil || l.file == nil {
30		return nil
31	}
32	var overlapped windows.Overlapped
33	unlockErr := windows.UnlockFileEx(windows.Handle(l.file.Fd()), 0, 1, 0, &overlapped)
34	closeErr := l.file.Close()
35	l.file = nil
36	if unlockErr != nil {
37		return unlockErr
38	}
39	return closeErr
40}