def read_vcp_code(self, code: int) -> Tuple[int, int]:
"""
send vcp code to monitor, get current value and max value.
https://msdn.microsoft.com/en-us/library/dd692953(v=vs.85).aspx
BOOL GetVCPFeatureAndVCPFeatureReply(
_In_ HANDLE hMonitor,
_In_ BYTE bVCPCode,
_Out_ LPMC_VCP_CODE_TYPE pvct,
_Out_ LPDWORD pdwCurrentValue,
_Out_ LPDWORD pdwMaximumValue
);
:param code: VCP Code
:return: current_value, max_value
"""
if code is None:
_LOGGER.error('vcp code to send is None. ignored.')
return 0, 0
api_call = ctypes.windll.Dxva2.GetVCPFeatureAndVCPFeatureReply
api_in_vcp_code = wintypes.BYTE(code)
api_out_current_value = wintypes.DWORD()
api_out_max_value = wintypes.DWORD()
if not api_call(self._phy_monitor_handle, api_in_vcp_code, None,
ctypes.byref(api_out_current_value), ctypes.byref(api_out_max_value)):
_LOGGER.error('get vcp command failed: ' + hex(code))
_LOGGER.error(ctypes.WinError())
return api_out_current_value.value, api_out_max_value.value
def send_vcp_code(self, code: int, value: int) -> bool:
"""
send vcp code to monitor.
https://msdn.microsoft.com/en-us/library/dd692979(v=vs.85).aspx
BOOL SetVCPFeature(
_In_ HANDLE hMonitor,
_In_ BYTE bVCPCode,
_In_ DWORD dwNewValue
);
:param code: VCP Code
:param value: Data
:return: Win32 API return
"""
if code is None:
_LOGGER.error('vcp code to send is None. ignored.')
return False
api_call = ctypes.windll.Dxva2.SetVCPFeature
code = wintypes.BYTE(code)
new_value = wintypes.DWORD(value)
api_call.restype = ctypes.c_bool
ret_ = api_call(self._phy_monitor_handle, code, new_value)
if not ret_:
_LOGGER.error('send vcp command failed: ' + hex(code))
_LOGGER.error(ctypes.WinError())
return ret_
def _get_vcf_feature_and_vcf_feature_reply(self, code):
"""Get current and maximun values for continuous VCP codes"""
current_value = wintypes.DWORD()
maximum_value = wintypes.DWORD()
if not ctypes.windll.dxva2.GetVCPFeatureAndVCPFeatureReply(
self._physicalMonitorHandle, wintypes.BYTE(code), None,
ctypes.byref(current_value), ctypes.byref(maximum_value)):
raise ctypes.WinError()
return current_value.value, maximum_value.value
def kill(pid : int, signal : int, timeout = 1000, dword1 = wintypes.DWORD(1)):
"""
Re-implementation of pg_kill for win32 using ctypes.
"""
if pid <= 0:
raise OSError(errno.EINVAL, "process group not supported")
if signal < 0 or signal >= PG_SIGNAL_COUNT:
raise OSError(errno.EINVAL, "unsupported signal number")
inbuffer = pointer(wintypes.BYTE(signal))
outbuffer = pointer(wintypes.BYTE(0))
outbytes = pointer(wintypes.DWORD(0))
pidpipe = br'\\.\pipe\pgsignal_' + str(pid).encode('ascii')
timeout = wintypes.DWORD(timeout)
r = CallNamedPipeA(
pidpipe, inbuffer, dword1, outbuffer, dword1, outbytes, timeout
)
if r:
if outbuffer.contents.value == signal:
if outbytes.contents.value == 1:
# success
return
# Don't bother emulating the other failure cases/abstractions.
# CallNamedPipeA should raise a WindowsError on those failures.
raise OSError(errno.ESRCH, "unexpected output from CallNamedPipeA")
def _set_vcp_feature(self, code, value):
"""Set 'code' to 'value'"""
if not ctypes.windll.dxva2.SetVCPFeature(self._handle,
wintypes.BYTE(code), wintypes.DWORD(value)):
raise ctypes.WinError()
