3.11.0-rc 3.10.0 (latest) 3.9.0 3.8.0 3.7.0 3.6.0 3.5.0 3.4.0 3.3.0 3.2.0 2.48.0-rc 2.47.1 2.46.0 2.45.0 2.44.0 2.43.0 2.42.0 2.41.0 2.40.0 2.39.0 2.38.0 2.37.0 2.36.0 2.35.0 2.34.0 2.33.0 2.32.0 2.31.0 2.30.0 2.29.0 2.28.0 2.27.0 2.26.0 2.25.1 2.24.0 2.23.0 2.22.1 2.21.0 2.20.0 2.19.0 2.18.0 2.17.0 2.16.0 2.15.1 2.14.0 2.13.0 2.12.0 2.11.0 2.10.1 The [`CompletionQueue`](https://docs.cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1CompletionQueue) to use for background gRPC work.
If this option is set, the library will use the supplied [`CompletionQueue`](https://docs.cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1CompletionQueue) instead of its own. The caller is responsible for making sure there are thread(s) servicing this [`CompletionQueue`](https://docs.cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1CompletionQueue). The client library will not create any background threads or attempt to call [`CompletionQueue::Run()`](https://docs.cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1CompletionQueue#classgoogle_1_1cloud_1_1CompletionQueue_1a9803235c77d3838d14b81f5200b204c4).

> [!NOTE]
> **Note:** [`GrpcBackgroundThreadPoolSizeOption`](https://docs.cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1GrpcBackgroundThreadPoolSizeOption), [`GrpcCompletionQueueOption`](https://docs.cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1GrpcCompletionQueueOption), and [`GrpcBackgroundThreadsFactoryOption`](https://docs.cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1GrpcBackgroundThreadsFactoryOption) are mutually exclusive.

## Type Aliases

### Type

**Alias Of** : `CompletionQueue`