| 1 | //go:build windows |
| 2 | |
| 3 | package main |
| 4 | |
| 5 | import ( |
| 6 | "errors" |
| 7 | "fmt" |
| 8 | "os" |
| 9 | "unsafe" |
| 10 | |
| 11 | "golang.org/x/sys/windows" |
| 12 | "reasonix/desktop/internal/instanceidentity" |
| 13 | ) |
| 14 | |
| 15 | var errEndpointStarting = errors.New("instance mutex exists without an identifiable endpoint") |
| 16 | |
| 17 | var handoffUser32 = windows.NewLazySystemDLL("user32.dll") |
| 18 | var findInstanceWindow = handoffUser32.NewProc("FindWindowExW") |
| 19 | var instanceWindowPID = handoffUser32.NewProc("GetWindowThreadProcessId") |
| 20 | |
| 21 | // These names match the retired Wails v2 single-instance backend so an |
| 22 | // update helper can still find a running pre-Electron app. HWND_MESSAGE |
| 23 | // is required: ordinary top-level window enumeration does not include them. |
| 24 | func desktopEndpointImage(id string) (string, error) { |
| 25 | image, err := instanceidentity.EndpointImage(id) |
| 26 | if errors.Is(err, windows.ERROR_PIPE_BUSY) { |
| 27 | return "", errEndpointStarting |
| 28 | } |
| 29 | if err != nil || image != "" { |
| 30 | return image, err |
| 31 | } |
| 32 | name := "wails-app-" + id |
| 33 | class, err := windows.UTF16PtrFromString(name + "-sic") |
| 34 | if err != nil { |
| 35 | return "", err |
| 36 | } |
| 37 | title, err := windows.UTF16PtrFromString(name + "-siw") |
| 38 | if err != nil { |
| 39 | return "", err |
| 40 | } |
| 41 | hwnd, _, _ := findInstanceWindow.Call(^uintptr(2), 0, uintptr(unsafe.Pointer(class)), uintptr(unsafe.Pointer(title))) |
| 42 | if hwnd == 0 { |
| 43 | mutexName, _ := windows.UTF16PtrFromString(name + "sim") |
| 44 | mutex, err := windows.OpenMutex(windows.SYNCHRONIZE, false, mutexName) |
| 45 | if errors.Is(err, windows.ERROR_FILE_NOT_FOUND) { |
| 46 | return "", nil |
| 47 | } |
| 48 | if err != nil { |
| 49 | return "", err |
| 50 | } |
| 51 | _ = windows.CloseHandle(mutex) |
| 52 | return "", errEndpointStarting |
| 53 | } |
| 54 | var pid uint32 |
| 55 | if result, _, err := instanceWindowPID.Call(hwnd, uintptr(unsafe.Pointer(&pid))); result == 0 || pid == 0 { |
| 56 | return "", fmt.Errorf("identify instance owner: %w", err) |
| 57 | } |
| 58 | handle, err := windows.OpenProcess(windows.PROCESS_QUERY_LIMITED_INFORMATION|windows.SYNCHRONIZE, false, pid) |
| 59 | if err != nil { |
| 60 | return "", err |
| 61 | } |
| 62 | defer windows.CloseHandle(handle) |
| 63 | var owner uint32 |
| 64 | instanceWindowPID.Call(hwnd, uintptr(unsafe.Pointer(&owner))) |
| 65 | if owner != pid { |
| 66 | return "", fmt.Errorf("instance owner changed during inspection") |
| 67 | } |
| 68 | size := uint32(32768) |
| 69 | buffer := make([]uint16, size) |
| 70 | if err := windows.QueryFullProcessImageName(handle, 0, &buffer[0], &size); err != nil { |
| 71 | return "", err |
| 72 | } |
| 73 | result, err := windows.WaitForSingleObject(handle, 0) |
| 74 | if err != nil || result != uint32(windows.WAIT_TIMEOUT) { |
| 75 | return "", fmt.Errorf("instance exited during inspection") |
| 76 | } |
| 77 | return windows.UTF16ToString(buffer[:size]), nil |
| 78 | } |
| 79 | |
| 80 | func notifyHandoffBlocked(installed bool) { |
| 81 | // Background/silent update execution has no interactive recovery owner. |
| 82 | // Its caller records the installed-versus-started result in the update log. |
| 83 | if os.Getenv("REASONIX_INTERACTIVE_RECOVERY") != "1" { |
| 84 | return |
| 85 | } |
| 86 | message := "Reasonix could not finish the update restart. Choose Quit in the old Reasonix window, then open Reasonix again. Your running instance was preserved." |
| 87 | if installed { |
| 88 | message = "The new version is installed, but restart is incomplete. Choose Quit in the old Reasonix window, then open Reasonix again. Your running instance was preserved." |
| 89 | } |
| 90 | message += "\n\n请在旧 Reasonix 窗口中选择退出，再重新打开 Reasonix。现有实例已保留。" |
| 91 | title, _ := windows.UTF16PtrFromString("Reasonix update / 更新") |
| 92 | body, _ := windows.UTF16PtrFromString(message) |
| 93 | // The helper runs after the desktop has exited; log-only failures are invisible. |
| 94 | handoffUser32.NewProc("MessageBoxW").Call(0, uintptr(unsafe.Pointer(body)), uintptr(unsafe.Pointer(title)), 0x00000030|0x00010000) |
| 95 | } |
| 96 |