| 63 | _read_reached_eof = False |
| 64 | |
| 65 | def read_nonblocking(self, size, timeout): |
| 66 | buf = self._buf |
| 67 | if self._read_reached_eof: |
| 68 | # We have already finished reading. Use up any buffered data, |
| 69 | # then raise EOF |
| 70 | if buf: |
| 71 | self._buf = buf[size:] |
| 72 | return buf[:size] |
| 73 | else: |
| 74 | self.flag_eof = True |
| 75 | raise EOF('End Of File (EOF).') |
| 76 | |
| 77 | if timeout == -1: |
| 78 | timeout = self.timeout |
| 79 | elif timeout is None: |
| 80 | timeout = 1e6 |
| 81 | |
| 82 | t0 = time.time() |
| 83 | while (time.time() - t0) < timeout and size and len(buf) < size: |
| 84 | try: |
| 85 | incoming = self._read_queue.get_nowait() |
| 86 | except Empty: |
| 87 | break |
| 88 | else: |
| 89 | if incoming is None: |
| 90 | self._read_reached_eof = True |
| 91 | break |
| 92 | |
| 93 | buf += self._decoder.decode(incoming, final=False) |
| 94 | |
| 95 | r, self._buf = buf[:size], buf[size:] |
| 96 | |
| 97 | self._log(r, 'read') |
| 98 | return r |
| 99 | |
| 100 | def _read_incoming(self): |
| 101 | """Run in a thread to move output from a pipe to a queue.""" |