tmp/tmpizee0kne/{from.md → to.md}
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| 1 |
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#### Member functions <a id="exec.run.loop.members">[[exec.run.loop.members]]</a>
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``` cpp
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run-loop-opstate-base* pop-front();
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```
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*Effects:* Blocks [[defns.block]] until one of the following conditions
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is `true`:
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- The `run_loop` instance’s count is 0 and its state is finishing, in
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which case *pop-front* sets the state to finished and returns
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`nullptr`; or
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- the `run_loop` instance’s count is greater than 0, in which case an
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item is removed from the front of the queue, the count is decremented
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by `1`, and the removed item is returned.
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``` cpp
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void push-back(run-loop-opstate-base* item);
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```
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*Effects:* Adds `item` to the back of the queue and increments the
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`run_loop` instance’s count by 1.
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*Synchronization:* This operation synchronizes with the *pop-front*
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operation that obtains `item`.
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``` cpp
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run-loop-scheduler get_scheduler();
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```
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*Returns:* An instance of *run-loop-scheduler* that can be used to
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schedule work onto this `run_loop` instance.
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``` cpp
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void run();
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```
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*Preconditions:* The `run_loop` instance’s state is either starting or
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finishing.
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*Effects:* If the `run_loop` instance’s state is starting, sets the
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state to running, otherwise leaves the state unchanged. Then, equivalent
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to:
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``` cpp
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while (auto* op = pop-front()) {
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op->execute();
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}
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```
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*Remarks:* When the `run_loop` instance’s state changes, it does so
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without introducing data races.
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``` cpp
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void finish();
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```
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*Preconditions:* The `run_loop` instance’s state is either starting or
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running.
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*Effects:* Changes the `run_loop` instance’s state to finishing.
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*Synchronization:* `finish` synchronizes with the *pop-front* operation
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that returns `nullptr`.
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