diff options
| -rw-r--r-- | src/runtime/os_windows.go | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/src/runtime/os_windows.go b/src/runtime/os_windows.go index a3292c427b..a278dddc57 100644 --- a/src/runtime/os_windows.go +++ b/src/runtime/os_windows.go @@ -261,7 +261,10 @@ func loadOptionalSyscalls() { } func monitorSuspendResume() { - const _DEVICE_NOTIFY_CALLBACK = 2 + const ( + _DEVICE_NOTIFY_CALLBACK = 2 + _ERROR_FILE_NOT_FOUND = 2 + ) type _DEVICE_NOTIFY_SUBSCRIBE_PARAMETERS struct { callback uintptr context uintptr @@ -287,10 +290,20 @@ func monitorSuspendResume() { callback: compileCallback(*efaceOf(&fn), true), } handle := uintptr(0) - if stdcall3(powerRegisterSuspendResumeNotification, _DEVICE_NOTIFY_CALLBACK, - uintptr(unsafe.Pointer(¶ms)), - uintptr(unsafe.Pointer(&handle))) != 0 { - throw("PowerRegisterSuspendResumeNotification failure") + ret := stdcall3(powerRegisterSuspendResumeNotification, _DEVICE_NOTIFY_CALLBACK, + uintptr(unsafe.Pointer(¶ms)), uintptr(unsafe.Pointer(&handle))) + // This function doesn't use GetLastError(), so we use the return value directly. + switch ret { + case 0: + return // Successful, nothing more to do. + case _ERROR_FILE_NOT_FOUND: + // Systems without access to the suspend/resume notifier + // also have their clock on "program time", and therefore + // don't want or need this anyway. + return + default: + println("runtime: PowerRegisterSuspendResumeNotification failed with errno=", ret) + throw("runtime: PowerRegisterSuspendResumeNotification failure") } } |