Context Management¶

hipCtxCreate¶

hipError_t hipCtxCreate(hipCtx_t *ctx, unsigned int flags, hipDevice_t device)¶

Create a context and set it as current/ default context.

Return

#hipSuccess

See

hipCtxDestroy, hipCtxGetFlags, hipCtxPopCurrent, hipCtxGetCurrent, hipCtxPushCurrent, hipCtxSetCacheConfig, hipCtxSynchronize, hipCtxGetDevice

Parameters

[out] ctx:
[in] flags:
[in] associated: device handle

hipCtxDestroy¶

hipError_t hipCtxDestroy(hipCtx_t ctx)¶

Destroy a HIP context.

Return

#hipSuccess, #hipErrorInvalidValue

See

hipCtxCreate, hipCtxGetFlags, hipCtxPopCurrent, hipCtxGetCurrent,hipCtxSetCurrent, hipCtxPushCurrent, hipCtxSetCacheConfig, hipCtxSynchronize , hipCtxGetDevice

Parameters

[in] ctx: Context to destroy

hipDevicePrimaryCtxGetState¶

hipError_t hipDevicePrimaryCtxGetState(hipDevice_t dev, unsigned int *flags, int *active)¶

Get the state of the primary context.

Return

#hipSuccess

See

hipCtxCreate, hipCtxDestroy, hipCtxGetFlags, hipCtxPopCurrent, hipCtxGetCurrent, hipCtxSetCurrent, hipCtxPushCurrent, hipCtxSetCacheConfig, hipCtxSynchronize, hipCtxGetDevice

Parameters

[in] Device: to get primary context flags for
[out] Pointer: to store flags
[out] Pointer: to store context state; 0 = inactive, 1 = active

hipDevicePrimaryCtxRelease¶

hipError_t hipDevicePrimaryCtxRelease(hipDevice_t dev)¶

Release the primary context on the GPU.

Return

#hipSuccess

See

hipCtxCreate, hipCtxDestroy, hipCtxGetFlags, hipCtxPopCurrent, hipCtxGetCurrent, hipCtxSetCurrent, hipCtxPushCurrent, hipCtxSetCacheConfig, hipCtxSynchronize, hipCtxGetDevice

Warning

This function return #hipSuccess though doesn’t release the primaryCtx by design on HIP/HCC path.

Parameters

[in] Device: which primary context is released

hipDevicePrimaryCtxRetain¶

hipError_t hipDevicePrimaryCtxRetain(hipCtx_t *pctx, hipDevice_t dev)¶

Retain the primary context on the GPU.

Return

#hipSuccess

See

hipCtxCreate, hipCtxDestroy, hipCtxGetFlags, hipCtxPopCurrent, hipCtxGetCurrent, hipCtxSetCurrent, hipCtxPushCurrent, hipCtxSetCacheConfig, hipCtxSynchronize, hipCtxGetDevice

Parameters

[out] Returned: context handle of the new context
[in] Device: which primary context is released

hipDevicePrimaryCtxReset¶

hipError_t hipDevicePrimaryCtxReset(hipDevice_t dev)¶

Resets the primary context on the GPU.

Return

#hipSuccess

See

hipCtxCreate, hipCtxDestroy, hipCtxGetFlags, hipCtxPopCurrent, hipCtxGetCurrent, hipCtxSetCurrent, hipCtxPushCurrent, hipCtxSetCacheConfig, hipCtxSynchronize, hipCtxGetDevice

Parameters

[in] Device: which primary context is reset

hipDevicePrimaryCtxSetFlags¶

hipError_t hipDevicePrimaryCtxSetFlags(hipDevice_t dev, unsigned int flags)¶

Set flags for the primary context.

Return

#hipSuccess, #hipErrorContextAlreadyInUse

See

hipCtxCreate, hipCtxDestroy, hipCtxGetFlags, hipCtxPopCurrent, hipCtxGetCurrent, hipCtxSetCurrent, hipCtxPushCurrent, hipCtxSetCacheConfig, hipCtxSynchronize, hipCtxGetDevice

Parameters

[in] Device: for which the primary context flags are set
[in] New: flags for the device