cl_int clEnqueueAcquireD3D10ObjectsKHR(cl_command_queue command_queue, cl_uint num_objects, const cl_mem *mem_objects, cl_uint num_events_in_wait_list, const cl_event *event_wait_list, cl_event *event)
command_queue - A valid command-queue.
num_objects - The number of memory objects to be acquired in mem_objects.
mem_objects - A pointer to a list of OpenCL memory objects that were created from Direct3D 10 resources.
num_events_in_wait_list - Number of events in event_wait_list.
event_wait_list - Specify events that need to complete before this particular command can be executed. If event_wait_list is NULL, then this particular command does not wait on any event to complete. If event_wait_list is NULL, num_events_in_wait_list must be 0. If event_wait_list is not NULL, the list of events pointed to by event_wait_list must be valid and num_events_in_wait_list must be greater than 0. The events specified in event_wait_list act as synchronization points.
event - Returns an event object that identifies this particular command and can be used to query or queue a wait for this particular command to complete. event can be NULL, in which case it will not be possible for the application to query the status of this command or queue a wait for this command to complete. If event_wait_list and event are not NULL, event should not refer to an element of the event_wait_list array.
The Direct3D 10 objects are acquired by the OpenCL context associated with
command-queue and can therefore be used by all command-queues associated with the OpenCL context.
OpenCL memory objects created from Direct3D 10 resources must be acquired before they can be used by any OpenCL commands queued to a command-queue.
If an OpenCL memory object created from a Direct3D 10 resource is used while it is not currently acquired by OpenCL, the call attempting to use that OpenCL memory object will return
CL_CONTEXT_INTEROP_USER_SYNC is not specified as
CL_TRUE during context creation,
clEnqueueAcquireD3D10ObjectsKHR provides the synchronization guarantee that any Direct3D 10 calls involving the interop device(s) used in the OpenCL context made before
clEnqueueAcquireD3D10ObjectsKHR is called will complete executing before event reports completion and before the execution of any subsequent OpenCL work issued in command_queue begins.
If the context was created with properties specifying
CL_TRUE, the user is responsible for guaranteeing that any Direct3D 10 calls involving the interop device(s) used in the OpenCL context made before
clEnqueueAcquireD3D10ObjectsKHR is called have completed before calling
General information about sharing memory objects with Direct3D 10 follows.
The goal of this extension is to provide interoperability between OpenCL and
Direct3D 10. This is designed to function analogously to the
cl_khr_gl_sharing as defined in sections 9.7 and 9.8. If this
extension is supported by an implementation, the string
"cl_khr_d3d10_sharing" will be present in the
As currently proposed the interfaces for this extension would be provided in
The OpenCL functions enabled by the cl_khr_d3d10_sharing extension allow applications to use Direct3D 10 resources as OpenCL memory objects. This allows efficient sharing of data between OpenCL and Direct3D 10. The OpenCL API may be used to execute kernels that read and/or write memory objects that are also Direct3D 10 resources. An OpenCL image object may be created from a Direct3D 10 texture resource. An OpenCL buffer object may be created from a Direct3D 10 buffer resource. OpenCL memory objects may be created from Direct3D 10 objects if and only if the OpenCL context has been created from a Direct3D 10 device.
An OpenCL memory object created from a Direct3D 10 resource remains valid as long as the corresponding Direct3D 10 resource has not been deleted. If the Direct3D 10 resource is deleted through the Direct3D 10 API, subsequent use of the OpenCL memory object will result in undefined behavior, including but not limited to possible OpenCL errors, data corruption, and program termination.
The successful creation of a
cl_context against a Direct3D 10 device
specified via the context create parameter
will increment the internal Direct3D reference count on the specified
Direct3D 10 device. The internal Direct3D reference count on that Direct3D
10 device will be decremented when the OpenCL reference count on the
returned OpenCL context drops to zero.
The OpenCL context and corresponding command-queues are dependent on the existence of the Direct3D 10 device from which the OpenCL context was created. If the Direct3D 10 device is deleted through the Direct3D 10 API, subsequent use of the OpenCL context will result in undefined behavior, including but not limited to possible OpenCL errors, data corruption, and program termination.
CL_SUCCESS if the function is executed successfully.
If num_objects is 0 and mem_objects is NULL then the function does nothing and returns
Otherwise it returns one of the following errors:
CL_INVALID_VALUEif num_objects is zero and mem_objects is not a NULL value or if num_objects > 0 and mem_objects is NULL.
CL_INVALID_MEM_OBJECTif memory objects in mem_objects are not valid OpenCL memory objects or if memory objects in mem_objects have not been created from Direct3D 10 resources.
CL_INVALID_COMMAND_QUEUEif command_queue is not a valid command-queue.
CL_INVALID_CONTEXTif context associated with command_queue was not created from an Direct3D 10 context.
CL_D3D10_RESOURCE_ALREADY_ACQUIRED_KHRwhen any of mem_objects are currently acquired using
clEnqueueAcquireD3D10ObjectsKHRbut have not been released using clEnqueueReleaseD3D10ObjectsKHR.
CL_INVALID_EVENT_WAIT_LISTif event_wait_list is NULL and
num_event_in_wait_list> 0, or event_wait_list is not NULL and
num_event_in_wait_listis 0, or if event objects in event_wait_list are not valid events.
CL_OUT_OF_HOST_MEMORYif there is a failure to allocate resources required by the OpenCL implementation on the host.
For more information, see the OpenCL Extension Specification at URL
Copyright (c) 2014-2020 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.