Provides **Context** APIs for configuring runtime information.
**Since:**
9
**Related Modules:**
[MindSpore](_mind_spore.md)
## Summary
### Types
| Name | Description |
| -------- | -------- |
| [OH_AI_ContextHandle](_mind_spore.md#oh_ai_contexthandle) | Defines the pointer to the MindSpore context. |
| [OH_AI_DeviceInfoHandle](_mind_spore.md#oh_ai_deviceinfohandle) | Defines the pointer to the MindSpore device information. |
### Functions
| Name | Description |
| -------- | -------- |
| [OH_AI_ContextCreate](_mind_spore.md#oh_ai_contextcreate)() | Creates a context object. |
| [OH_AI_ContextDestroy](_mind_spore.md#oh_ai_contextdestroy)([OH_AI_ContextHandle](_mind_spore.md#oh_ai_contexthandle)\*context) | Destroys a context object. |
| [OH_AI_ContextSetThreadNum](_mind_spore.md#oh_ai_contextsetthreadnum)([OH_AI_ContextHandle](_mind_spore.md#oh_ai_contexthandle) context, int32_t thread_num) | Sets the number of runtime threads. |
| [OH_AI_ContextGetThreadNum](_mind_spore.md#oh_ai_contextgetthreadnum)(const[OH_AI_ContextHandle](_mind_spore.md#oh_ai_contexthandle) context) | Obtains the number of threads. |
| [OH_AI_ContextSetThreadAffinityMode](_mind_spore.md#oh_ai_contextsetthreadaffinitymode)([OH_AI_ContextHandle](_mind_spore.md#oh_ai_contexthandle) context, int mode) | Sets the affinity mode for binding runtime threads to CPU cores, which are categorized into little cores and big cores depending on the CPU frequency. |
| [OH_AI_ContextGetThreadAffinityMode](_mind_spore.md#oh_ai_contextgetthreadaffinitymode)(const[OH_AI_ContextHandle](_mind_spore.md#oh_ai_contexthandle) context) | Obtains the affinity mode for binding runtime threads to CPU cores. |
| [OH_AI_ContextSetThreadAffinityCoreList](_mind_spore.md#oh_ai_contextsetthreadaffinitycorelist)([OH_AI_ContextHandle](_mind_spore.md#oh_ai_contexthandle) context, const int32_t \*core_list, size_t core_num) | Sets the list of CPU cores bound to a runtime thread. |
| [OH_AI_ContextGetThreadAffinityCoreList](_mind_spore.md#oh_ai_contextgetthreadaffinitycorelist)(const[OH_AI_ContextHandle](_mind_spore.md#oh_ai_contexthandle) context, size_t \*core_num) | Obtains the list of bound CPU cores. |
| [OH_AI_ContextSetEnableParallel](_mind_spore.md#oh_ai_contextsetenableparallel)([OH_AI_ContextHandle](_mind_spore.md#oh_ai_contexthandle) context, bool is_parallel) | Sets whether to enable parallelism between operators. |
| [OH_AI_ContextGetEnableParallel](_mind_spore.md#oh_ai_contextgetenableparallel)(const[OH_AI_ContextHandle](_mind_spore.md#oh_ai_contexthandle) context) | Checks whether parallelism between operators is supported. |
| [OH_AI_ContextAddDeviceInfo](_mind_spore.md#oh_ai_contextadddeviceinfo)([OH_AI_ContextHandle](_mind_spore.md#oh_ai_contexthandle) context, [OH_AI_DeviceInfoHandle](_mind_spore.md#oh_ai_deviceinfohandle) device_info) | Adds information about a running device. |
| [OH_AI_DeviceInfoCreate](_mind_spore.md#oh_ai_deviceinfocreate)([OH_AI_DeviceType](_mind_spore.md#oh_ai_devicetype) device_type) | Creates a device information object. |
| [OH_AI_DeviceInfoDestroy](_mind_spore.md#oh_ai_deviceinfodestroy)([OH_AI_DeviceInfoHandle](_mind_spore.md#oh_ai_deviceinfohandle)\*device_info) | Destroys a device information instance. |
| [OH_AI_DeviceInfoSetProvider](_mind_spore.md#oh_ai_deviceinfosetprovider)([OH_AI_DeviceInfoHandle](_mind_spore.md#oh_ai_deviceinfohandle) device_info, const char \*provider) | Sets the name of a provider. |
| [OH_AI_DeviceInfoGetProvider](_mind_spore.md#oh_ai_deviceinfogetprovider)(const[OH_AI_DeviceInfoHandle](_mind_spore.md#oh_ai_deviceinfohandle) device_info) | Obtains the provider name. |
| [OH_AI_DeviceInfoSetProviderDevice](_mind_spore.md#oh_ai_deviceinfosetproviderdevice)([OH_AI_DeviceInfoHandle](_mind_spore.md#oh_ai_deviceinfohandle) device_info, const char \*device) | Sets the name of a provider device. |
| [OH_AI_DeviceInfoGetProviderDevice](_mind_spore.md#oh_ai_deviceinfogetproviderdevice)(const[OH_AI_DeviceInfoHandle](_mind_spore.md#oh_ai_deviceinfohandle) device_info) | Obtains the name of a provider device. |
| [OH_AI_DeviceInfoGetDeviceType](_mind_spore.md#oh_ai_deviceinfogetdevicetype)(const[OH_AI_DeviceInfoHandle](_mind_spore.md#oh_ai_deviceinfohandle) device_info) | Obtains the type of a provider device. |
| [OH_AI_DeviceInfoSetEnableFP16](_mind_spore.md#oh_ai_deviceinfosetenablefp16)([OH_AI_DeviceInfoHandle](_mind_spore.md#oh_ai_deviceinfohandle) device_info, bool is_fp16) | Sets whether to enable float16 inference. This function is available only for CPU/GPU devices. |
| [OH_AI_DeviceInfoGetEnableFP16](_mind_spore.md#oh_ai_deviceinfogetenablefp16)(const[OH_AI_DeviceInfoHandle](_mind_spore.md#oh_ai_deviceinfohandle) device_info) | Checks whether float16 inference is enabled. This function is available only for CPU/GPU devices. |
| [OH_AI_DeviceInfoSetFrequency](_mind_spore.md#oh_ai_deviceinfosetfrequency)([OH_AI_DeviceInfoHandle](_mind_spore.md#oh_ai_deviceinfohandle) device_info, int frequency) | Sets the NPU frequency type. This function is available only for NPU devices. |
| [OH_AI_DeviceInfoGetFrequency](_mind_spore.md#oh_ai_deviceinfogetfrequency)(const[OH_AI_DeviceInfoHandle](_mind_spore.md#oh_ai_deviceinfohandle) device_info) | Obtains the NPU frequency type. This function is available only for NPU devices. |
