(function: _EffectApplyFunc)
| 139 | last_clean_callback: Ref[_EffectCleanFunc | None] = use_ref(None) |
| 140 | |
| 141 | def add_effect(function: _EffectApplyFunc) -> None: |
| 142 | if not asyncio.iscoroutinefunction(function): |
| 143 | sync_function = cast(_SyncEffectFunc, function) |
| 144 | else: |
| 145 | async_function = cast(_AsyncEffectFunc, function) |
| 146 | |
| 147 | def sync_function() -> _EffectCleanFunc | None: |
| 148 | task = asyncio.create_task(async_function()) |
| 149 | |
| 150 | def clean_future() -> None: |
| 151 | if not task.cancel(): |
| 152 | try: |
| 153 | clean = task.result() |
| 154 | except asyncio.CancelledError: |
| 155 | pass |
| 156 | else: |
| 157 | if clean is not None: |
| 158 | clean() |
| 159 | |
| 160 | return clean_future |
| 161 | |
| 162 | async def effect(stop: asyncio.Event) -> None: |
| 163 | if last_clean_callback.current is not None: |
| 164 | last_clean_callback.current() |
| 165 | last_clean_callback.current = None |
| 166 | clean = last_clean_callback.current = sync_function() |
| 167 | await stop.wait() |
| 168 | if clean is not None: |
| 169 | clean() |
| 170 | |
| 171 | return memoize(lambda: hook.add_effect(effect)) |
| 172 | |
| 173 | if function is not None: |
| 174 | add_effect(function) |
no test coverage detected