Python win32.GetOverlappedResult方法代码示例

# 需要导入模块: from serial import win32 [as 别名]
# 或者: from serial.win32 import GetOverlappedResult [as 别名]
def write(self, data):
        """Output the given byte string over the serial port."""
        if not self._port_handle:
            raise portNotOpenError
        #~ if not isinstance(data, (bytes, bytearray)):
            #~ raise TypeError('expected %s or bytearray, got %s' % (bytes, type(data)))
        # convert data (needed in case of memoryview instance: Py 3.1 io lib), ctypes doesn't like memoryview
        data = to_bytes(data)
        if data:
            #~ win32event.ResetEvent(self._overlapped_write.hEvent)
            n = win32.DWORD()
            err = win32.WriteFile(self._port_handle, data, len(data), ctypes.byref(n), self._overlapped_write)
            if not err and win32.GetLastError() != win32.ERROR_IO_PENDING:
                raise SerialException("WriteFile failed (%r)" % ctypes.WinError())
            if self._write_timeout != 0:  # if blocking (None) or w/ write timeout (>0)
                # Wait for the write to complete.
                #~ win32.WaitForSingleObject(self._overlapped_write.hEvent, win32.INFINITE)
                err = win32.GetOverlappedResult(self._port_handle, self._overlapped_write, ctypes.byref(n), True)
                if n.value != len(data):
                    raise writeTimeoutError
            return n.value
        else:
            return 0 

# 需要导入模块: from serial import win32 [as 别名]
# 或者: from serial.win32 import GetOverlappedResult [as 别名]
def write(self, data):
        """Output the given string over the serial port."""
        if not self.hComPort: raise portNotOpenError
        #~ if not isinstance(data, (bytes, bytearray)):
            #~ raise TypeError('expected %s or bytearray, got %s' % (bytes, type(data)))
        # convert data (needed in case of memoryview instance: Py 3.1 io lib), ctypes doesn't like memoryview
        data = to_bytes(data)
        if data:
            #~ win32event.ResetEvent(self._overlappedWrite.hEvent)
            n = win32.DWORD()
            err = win32.WriteFile(self.hComPort, data, len(data), ctypes.byref(n), self._overlappedWrite)
            if not err and win32.GetLastError() != win32.ERROR_IO_PENDING:
                raise SerialException("WriteFile failed (%r)" % ctypes.WinError())
            if self._writeTimeout != 0: # if blocking (None) or w/ write timeout (>0)
                # Wait for the write to complete.
                #~ win32.WaitForSingleObject(self._overlappedWrite.hEvent, win32.INFINITE)
                err = win32.GetOverlappedResult(self.hComPort, self._overlappedWrite, ctypes.byref(n), True)
                if n.value != len(data):
                    raise writeTimeoutError
            return n.value
        else:
            return 0 

# 需要导入模块: from serial import win32 [as 别名]
# 或者: from serial.win32 import GetOverlappedResult [as 别名]
def write(self, data):
        """Output the given byte string over the serial port."""
        if not self.is_open:
            raise portNotOpenError
        #~ if not isinstance(data, (bytes, bytearray)):
            #~ raise TypeError('expected %s or bytearray, got %s' % (bytes, type(data)))
        # convert data (needed in case of memoryview instance: Py 3.1 io lib), ctypes doesn't like memoryview
        data = to_bytes(data)
        if data:
            #~ win32event.ResetEvent(self._overlapped_write.hEvent)
            n = win32.DWORD()
            err = win32.WriteFile(self._port_handle, data, len(data), ctypes.byref(n), self._overlapped_write)
            if not err and win32.GetLastError() != win32.ERROR_IO_PENDING:
                raise SerialException("WriteFile failed ({!r})".format(ctypes.WinError()))
            if self._write_timeout != 0:  # if blocking (None) or w/ write timeout (>0)
                # Wait for the write to complete.
                #~ win32.WaitForSingleObject(self._overlapped_write.hEvent, win32.INFINITE)
                err = win32.GetOverlappedResult(self._port_handle, self._overlapped_write, ctypes.byref(n), True)
                if win32.GetLastError() == win32.ERROR_OPERATION_ABORTED:
                    return n.value  # canceled IO is no error
                if n.value != len(data):
                    raise writeTimeoutError
            return n.value
        else:
            return 0 

# 需要导入模块: from serial import win32 [as 别名]
# 或者: from serial.win32 import GetOverlappedResult [as 别名]
def write(self, data):
        """Output the given string over the serial port."""
        if not self.hComPort: raise portNotOpenError
        #~ if not isinstance(data, (bytes, bytearray)):
            #~ raise TypeError('expected %s or bytearray, got %s' % (bytes, type(data)))
        # convert data (needed in case of memoryview instance: Py 3.1 io lib), ctypes doesn't like memoryview
        data = bytes(data)
        if data:
            #~ win32event.ResetEvent(self._overlappedWrite.hEvent)
            n = win32.DWORD()
            err = win32.WriteFile(self.hComPort, data, len(data), ctypes.byref(n), self._overlappedWrite)
            if not err and win32.GetLastError() != win32.ERROR_IO_PENDING:
                raise SerialException("WriteFile failed (%s)" % ctypes.WinError())
            if self._writeTimeout != 0: # if blocking (None) or w/ write timeout (>0)
                # Wait for the write to complete.
                #~ win32.WaitForSingleObject(self._overlappedWrite.hEvent, win32.INFINITE)
                err = win32.GetOverlappedResult(self.hComPort, self._overlappedWrite, ctypes.byref(n), True)
                if n.value != len(data):
                    raise writeTimeoutError
            return n.value
        else:
            return 0 

# 需要导入模块: from serial import win32 [as 别名]
# 或者: from serial.win32 import GetOverlappedResult [as 别名]
def read(self, size=1):
        """\
        Read size bytes from the serial port. If a timeout is set it may
        return less characters as requested. With no timeout it will block
        until the requested number of bytes is read."""
        if not self._port_handle:
            raise portNotOpenError
        if size > 0:
            win32.ResetEvent(self._overlapped_read.hEvent)
            flags = win32.DWORD()
            comstat = win32.COMSTAT()
            if not win32.ClearCommError(self._port_handle, ctypes.byref(flags), ctypes.byref(comstat)):
                raise SerialException('call to ClearCommError failed')
            if self.timeout == 0:
                n = min(comstat.cbInQue, size)
                if n > 0:
                    buf = ctypes.create_string_buffer(n)
                    rc = win32.DWORD()
                    read_ok = win32.ReadFile(self._port_handle, buf, n, ctypes.byref(rc), ctypes.byref(self._overlapped_read))
                    if not read_ok and win32.GetLastError() not in (win32.ERROR_SUCCESS, win32.ERROR_IO_PENDING):
                        raise SerialException("ReadFile failed (%r)" % ctypes.WinError())
                    win32.GetOverlappedResult(self._port_handle, ctypes.byref(self._overlapped_read), ctypes.byref(rc), True)
                    read = buf.raw[:rc.value]
                else:
                    read = bytes()
            else:
                buf = ctypes.create_string_buffer(size)
                rc = win32.DWORD()
                read_ok = win32.ReadFile(self._port_handle, buf, size, ctypes.byref(rc), ctypes.byref(self._overlapped_read))
                if not read_ok and win32.GetLastError() not in (win32.ERROR_SUCCESS, win32.ERROR_IO_PENDING):
                    raise SerialException("ReadFile failed (%r)" % ctypes.WinError())
                win32.GetOverlappedResult(self._port_handle, ctypes.byref(self._overlapped_read), ctypes.byref(rc), True)
                read = buf.raw[:rc.value]
        else:
            read = bytes()
        return bytes(read) 

# 需要导入模块: from serial import win32 [as 别名]
# 或者: from serial.win32 import GetOverlappedResult [as 别名]
def read(self, size=1):
        """Read size bytes from the serial port. If a timeout is set it may
           return less characters as requested. With no timeout it will block
           until the requested number of bytes is read."""
        if not self.hComPort: raise portNotOpenError
        if size > 0:
            win32.ResetEvent(self._overlappedRead.hEvent)
            flags = win32.DWORD()
            comstat = win32.COMSTAT()
            if not win32.ClearCommError(self.hComPort, ctypes.byref(flags), ctypes.byref(comstat)):
                raise SerialException('call to ClearCommError failed')
            if self.timeout == 0:
                n = min(comstat.cbInQue, size)
                if n > 0:
                    buf = ctypes.create_string_buffer(n)
                    rc = win32.DWORD()
                    err = win32.ReadFile(self.hComPort, buf, n, ctypes.byref(rc), ctypes.byref(self._overlappedRead))
                    if not err and win32.GetLastError() != win32.ERROR_IO_PENDING:
                        raise SerialException("ReadFile failed (%r)" % ctypes.WinError())
                    err = win32.WaitForSingleObject(self._overlappedRead.hEvent, win32.INFINITE)
                    read = buf.raw[:rc.value]
                else:
                    read = bytes()
            else:
                buf = ctypes.create_string_buffer(size)
                rc = win32.DWORD()
                err = win32.ReadFile(self.hComPort, buf, size, ctypes.byref(rc), ctypes.byref(self._overlappedRead))
                if not err and win32.GetLastError() != win32.ERROR_IO_PENDING:
                    raise SerialException("ReadFile failed (%r)" % ctypes.WinError())
                err = win32.GetOverlappedResult(self.hComPort, ctypes.byref(self._overlappedRead), ctypes.byref(rc), True)
                read = buf.raw[:rc.value]
        else:
            read = bytes()
        return bytes(read) 

# 需要导入模块: from serial import win32 [as 别名]
# 或者: from serial.win32 import GetOverlappedResult [as 别名]
def read(self, size=1):
        """\
        Read size bytes from the serial port. If a timeout is set it may
        return less characters as requested. With no timeout it will block
        until the requested number of bytes is read.
        """
        if not self.is_open:
            raise portNotOpenError
        if size > 0:
            win32.ResetEvent(self._overlapped_read.hEvent)
            flags = win32.DWORD()
            comstat = win32.COMSTAT()
            if not win32.ClearCommError(self._port_handle, ctypes.byref(flags), ctypes.byref(comstat)):
                raise SerialException("ClearCommError failed ({!r})".format(ctypes.WinError()))
            n = min(comstat.cbInQue, size) if self.timeout == 0 else size
            if n > 0:
                buf = ctypes.create_string_buffer(n)
                rc = win32.DWORD()
                read_ok = win32.ReadFile(
                    self._port_handle,
                    buf,
                    n,
                    ctypes.byref(rc),
                    ctypes.byref(self._overlapped_read))
                if not read_ok and win32.GetLastError() not in (win32.ERROR_SUCCESS, win32.ERROR_IO_PENDING):
                    raise SerialException("ReadFile failed ({!r})".format(ctypes.WinError()))
                result_ok = win32.GetOverlappedResult(
                    self._port_handle,
                    ctypes.byref(self._overlapped_read),
                    ctypes.byref(rc),
                    True)
                if not result_ok:
                    if win32.GetLastError() != win32.ERROR_OPERATION_ABORTED:
                        raise SerialException("GetOverlappedResult failed ({!r})".format(ctypes.WinError()))
                read = buf.raw[:rc.value]
            else:
                read = bytes()
        else:
            read = bytes()
        return bytes(read) 

# 需要导入模块: from serial import win32 [as 别名]
# 或者: from serial.win32 import GetOverlappedResult [as 别名]
def write(self, data):
        """Output the given byte string over the serial port."""
        if not self.is_open:
            raise portNotOpenError
        #~ if not isinstance(data, (bytes, bytearray)):
            #~ raise TypeError('expected %s or bytearray, got %s' % (bytes, type(data)))
        # convert data (needed in case of memoryview instance: Py 3.1 io lib), ctypes doesn't like memoryview
        data = to_bytes(data)
        if data:
            #~ win32event.ResetEvent(self._overlapped_write.hEvent)
            n = win32.DWORD()
            success = win32.WriteFile(self._port_handle, data, len(data), ctypes.byref(n), self._overlapped_write)
            if self._write_timeout != 0:  # if blocking (None) or w/ write timeout (>0)
                if not success and win32.GetLastError() != win32.ERROR_IO_PENDING:
                    raise SerialException("WriteFile failed ({!r})".format(ctypes.WinError()))

                # Wait for the write to complete.
                #~ win32.WaitForSingleObject(self._overlapped_write.hEvent, win32.INFINITE)
                win32.GetOverlappedResult(self._port_handle, self._overlapped_write, ctypes.byref(n), True)
                if win32.GetLastError() == win32.ERROR_OPERATION_ABORTED:
                    return n.value  # canceled IO is no error
                if n.value != len(data):
                    raise writeTimeoutError
                return n.value
            else:
                errorcode = win32.ERROR_SUCCESS if success else win32.GetLastError()
                if errorcode in (win32.ERROR_INVALID_USER_BUFFER, win32.ERROR_NOT_ENOUGH_MEMORY,
                                 win32.ERROR_OPERATION_ABORTED):
                    return 0
                elif errorcode in (win32.ERROR_SUCCESS, win32.ERROR_IO_PENDING):
                    # no info on true length provided by OS function in async mode
                    return len(data)
                else:
                    raise SerialException("WriteFile failed ({!r})".format(ctypes.WinError()))
        else:
            return 0 

# 需要导入模块: from serial import win32 [as 别名]
# 或者: from serial.win32 import GetOverlappedResult [as 别名]
def _cancel_overlapped_io(self, overlapped):
        """Cancel a blocking read operation, may be called from other thread"""
        # check if read operation is pending
        rc = win32.DWORD()
        err = win32.GetOverlappedResult(
            self._port_handle,
            ctypes.byref(overlapped),
            ctypes.byref(rc),
            False)
        if not err and win32.GetLastError() in (win32.ERROR_IO_PENDING, win32.ERROR_IO_INCOMPLETE):
            # cancel, ignoring any errors (e.g. it may just have finished on its own)
            win32.CancelIoEx(self._port_handle, overlapped) 

# 需要导入模块: from serial import win32 [as 别名]
# 或者: from serial.win32 import GetOverlappedResult [as 别名]
def write(self, data):
        """Output the given byte string over the serial port."""
        if not self.is_open:
            raise portNotOpenError
        #~ if not isinstance(data, (bytes, bytearray)):
            #~ raise TypeError('expected %s or bytearray, got %s' % (bytes, type(data)))
        # convert data (needed in case of memoryview instance: Py 3.1 io lib), ctypes doesn't like memoryview
        data = to_bytes(data)
        if data:
            #~ win32event.ResetEvent(self._overlapped_write.hEvent)
            n = win32.DWORD()
            success = win32.WriteFile(self._port_handle, data, len(data), ctypes.byref(n), self._overlapped_write)
            if self._write_timeout != 0:  # if blocking (None) or w/ write timeout (>0)
                if not success and win32.GetLastError() not in (win32.ERROR_SUCCESS, win32.ERROR_IO_PENDING):
                    raise SerialException("WriteFile failed ({!r})".format(ctypes.WinError()))

                # Wait for the write to complete.
                #~ win32.WaitForSingleObject(self._overlapped_write.hEvent, win32.INFINITE)
                win32.GetOverlappedResult(self._port_handle, self._overlapped_write, ctypes.byref(n), True)
                if win32.GetLastError() == win32.ERROR_OPERATION_ABORTED:
                    return n.value  # canceled IO is no error
                if n.value != len(data):
                    raise writeTimeoutError
                return n.value
            else:
                errorcode = win32.ERROR_SUCCESS if success else win32.GetLastError()
                if errorcode in (win32.ERROR_INVALID_USER_BUFFER, win32.ERROR_NOT_ENOUGH_MEMORY,
                                 win32.ERROR_OPERATION_ABORTED):
                    return 0
                elif errorcode in (win32.ERROR_SUCCESS, win32.ERROR_IO_PENDING):
                    # no info on true length provided by OS function in async mode
                    return len(data)
                else:
                    raise SerialException("WriteFile failed ({!r})".format(ctypes.WinError()))
        else:
            return 0 

# 需要导入模块: from serial import win32 [as 别名]
# 或者: from serial.win32 import GetOverlappedResult [as 别名]
def read(self, size=1):
        """\
        Read size bytes from the serial port. If a timeout is set it may
        return less characters as requested. With no timeout it will block
        until the requested number of bytes is read."""
        if not self._port_handle:
            raise portNotOpenError
        if size > 0:
            win32.ResetEvent(self._overlapped_read.hEvent)
            flags = win32.DWORD()
            comstat = win32.COMSTAT()
            if not win32.ClearCommError(self._port_handle, ctypes.byref(flags), ctypes.byref(comstat)):
                raise SerialException('call to ClearCommError failed')
            if self.timeout == 0:
                n = min(comstat.cbInQue, size)
                if n > 0:
                    buf = ctypes.create_string_buffer(n)
                    rc = win32.DWORD()
                    read_ok = win32.ReadFile(self._port_handle, buf, n, ctypes.byref(rc), ctypes.byref(self._overlapped_read))
                    if not read_ok and win32.GetLastError() not in (win32.ERROR_SUCCESS, win32.ERROR_IO_PENDING):
                        raise SerialException("ReadFile failed (%r)" % ctypes.WinError())
                    win32.WaitForSingleObject(self._overlapped_read.hEvent, win32.INFINITE)
                    read = buf.raw[:rc.value]
                else:
                    read = bytes()
            else:
                buf = ctypes.create_string_buffer(size)
                rc = win32.DWORD()
                read_ok = win32.ReadFile(self._port_handle, buf, size, ctypes.byref(rc), ctypes.byref(self._overlapped_read))
                if not read_ok and win32.GetLastError() not in (win32.ERROR_SUCCESS, win32.ERROR_IO_PENDING):
                    raise SerialException("ReadFile failed (%r)" % ctypes.WinError())
                win32.GetOverlappedResult(self._port_handle, ctypes.byref(self._overlapped_read), ctypes.byref(rc), True)
                read = buf.raw[:rc.value]
        else:
            read = bytes()
        return bytes(read) 

# 需要导入模块: from serial import win32 [as 别名]
# 或者: from serial.win32 import GetOverlappedResult [as 别名]
def read(self, size=1):
        """\
        Read size bytes from the serial port. If a timeout is set it may
        return less characters as requested. With no timeout it will block
        until the requested number of bytes is read."""
        if not self.hComPort: raise portNotOpenError
        if size > 0:
            win32.ResetEvent(self._overlappedRead.hEvent)
            flags = win32.DWORD()
            comstat = win32.COMSTAT()
            if not win32.ClearCommError(self.hComPort, ctypes.byref(flags), ctypes.byref(comstat)):
                raise SerialException('call to ClearCommError failed')
            if self.timeout == 0:
                n = min(comstat.cbInQue, size)
                if n > 0:
                    buf = ctypes.create_string_buffer(n)
                    rc = win32.DWORD()
                    err = win32.ReadFile(self.hComPort, buf, n, ctypes.byref(rc), ctypes.byref(self._overlappedRead))
                    if not err and win32.GetLastError() != win32.ERROR_IO_PENDING:
                        raise SerialException("ReadFile failed (%r)" % ctypes.WinError())
                    err = win32.WaitForSingleObject(self._overlappedRead.hEvent, win32.INFINITE)
                    read = buf.raw[:rc.value]
                else:
                    read = bytes()
            else:
                buf = ctypes.create_string_buffer(size)
                rc = win32.DWORD()
                err = win32.ReadFile(self.hComPort, buf, size, ctypes.byref(rc), ctypes.byref(self._overlappedRead))
                if not err and win32.GetLastError() != win32.ERROR_IO_PENDING:
                    raise SerialException("ReadFile failed (%r)" % ctypes.WinError())
                err = win32.GetOverlappedResult(self.hComPort, ctypes.byref(self._overlappedRead), ctypes.byref(rc), True)
                read = buf.raw[:rc.value]
        else:
            read = bytes()
        return bytes(read) 

# 需要导入模块: from serial import win32 [as 别名]
# 或者: from serial.win32 import GetOverlappedResult [as 别名]
def read(self, size=1):
        """Read size bytes from the serial port. If a timeout is set it may
           return less characters as requested. With no timeout it will block
           until the requested number of bytes is read."""
        if not self.hComPort: raise portNotOpenError
        if size > 0:
            win32.ResetEvent(self._overlappedRead.hEvent)
            flags = win32.DWORD()
            comstat = win32.COMSTAT()
            if not win32.ClearCommError(self.hComPort, ctypes.byref(flags), ctypes.byref(comstat)):
                raise SerialException('call to ClearCommError failed')
            if self.timeout == 0:
                n = min(comstat.cbInQue, size)
                if n > 0:
                    buf = ctypes.create_string_buffer(n)
                    rc = win32.DWORD()
                    err = win32.ReadFile(self.hComPort, buf, n, ctypes.byref(rc), ctypes.byref(self._overlappedRead))
                    if not err and win32.GetLastError() != win32.ERROR_IO_PENDING:
                        raise SerialException("ReadFile failed (%s)" % ctypes.WinError())
                    err = win32.WaitForSingleObject(self._overlappedRead.hEvent, win32.INFINITE)
                    read = buf.raw[:rc.value]
                else:
                    read = bytes()
            else:
                buf = ctypes.create_string_buffer(size)
                rc = win32.DWORD()
                err = win32.ReadFile(self.hComPort, buf, size, ctypes.byref(rc), ctypes.byref(self._overlappedRead))
                if not err and win32.GetLastError() != win32.ERROR_IO_PENDING:
                    raise SerialException("ReadFile failed (%s)" % ctypes.WinError())
                err = win32.GetOverlappedResult(self.hComPort, ctypes.byref(self._overlappedRead), ctypes.byref(rc), True)
                read = buf.raw[:rc.value]
        else:
            read = bytes()
        return bytes(read)