_pollingfile.py 文件源码

def checkWork(self):
        numBytesWritten = 0
        if not self.outQueue:
            if self.disconnecting:
                self.writeConnectionLost()
                return 0
            try:
                win32file.WriteFile(self.writePipe, '', None)
            except pywintypes.error:
                self.writeConnectionLost()
                return numBytesWritten
        while self.outQueue:
            data = self.outQueue.pop(0)
            errCode = 0
            try:
                errCode, nBytesWritten = win32file.WriteFile(self.writePipe,
                                                             data, None)
            except win32api.error:
                self.writeConnectionLost()
                break
            else:
                # assert not errCode, "wtf an error code???"
                numBytesWritten += nBytesWritten
                if len(data) > nBytesWritten:
                    self.outQueue.insert(0, data[nBytesWritten:])
                    break
        else:
            resumed = self.bufferEmpty()
            if not resumed and self.disconnecting:
                self.writeConnectionLost()
        return numBytesWritten