(fs, return_when)
| 147 | future._condition.release() |
| 148 | |
| 149 | def _create_and_install_waiters(fs, return_when): |
| 150 | if return_when == _AS_COMPLETED: |
| 151 | waiter = _AsCompletedWaiter() |
| 152 | elif return_when == FIRST_COMPLETED: |
| 153 | waiter = _FirstCompletedWaiter() |
| 154 | else: |
| 155 | pending_count = sum( |
| 156 | f._state not in [CANCELLED_AND_NOTIFIED, FINISHED] for f in fs) |
| 157 | |
| 158 | if return_when == FIRST_EXCEPTION: |
| 159 | waiter = _AllCompletedWaiter(pending_count, stop_on_exception=True) |
| 160 | elif return_when == ALL_COMPLETED: |
| 161 | waiter = _AllCompletedWaiter(pending_count, stop_on_exception=False) |
| 162 | else: |
| 163 | raise ValueError("Invalid return condition: %r" % return_when) |
| 164 | |
| 165 | for f in fs: |
| 166 | f._waiters.append(waiter) |
| 167 | |
| 168 | return waiter |
| 169 | |
| 170 | |
| 171 | def _yield_finished_futures(fs, waiter, ref_collect): |
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