// Enqueues a command to map a region of the buffer object given by buffer into the host address space and returns a pointer to this mapped region.
func (q *CommandQueue) EnqueueMapBuffer(buffer *MemObject, blocking bool, flags MapFlag, offset, size int, eventWaitList []*Event) (*MappedMemObject, *Event, error) {
var event C.cl_event
var err C.cl_int
ptr := C.clEnqueueMapBuffer(q.clQueue, buffer.clMem, clBool(blocking), flags.toCl(), C.size_t(offset), C.size_t(size), C.cl_uint(len(eventWaitList)), eventListPtr(eventWaitList), &event, &err)
if err != C.CL_SUCCESS {
return nil, nil, toError(err)
}
ev := newEvent(event)
if ptr == nil {
return nil, ev, ErrUnknown
}
return &MappedMemObject{ptr: ptr, size: size}, ev, nil
}
// see https://www.khronos.org/registry/cl/sdk/1.1/docs/man/xhtml/clEnqueueMapBuffer.html
func EnqueueMapBuffer(cq CommandQueue, buffer Mem, blocking_map Bool, map_flags uint64, offset uint64, size uint64, num_events_in_wait_list uint32, event_wait_list *Event, event *Event, errcode_ret *int32) unsafe.Pointer {
return unsafe.Pointer(C.clEnqueueMapBuffer(cq, buffer, C.cl_bool(blocking_map), C.cl_map_flags(map_flags), C.size_t(offset), C.size_t(size), C.cl_uint(num_events_in_wait_list), (*C.cl_event)(unsafe.Pointer(event_wait_list)), (*C.cl_event)(unsafe.Pointer(event)), (*C.cl_int)(unsafe.Pointer(errcode_ret))))
}
func CLEnqueueMapBuffer(command_queue CL_command_queue,
buffer CL_mem,
blocking_map CL_bool,
map_flags CL_map_flags,
offset CL_size_t,
cb CL_size_t,
num_events_in_wait_list CL_uint,
event_wait_list []CL_event,
event *CL_event,
errcode_ret *CL_int) unsafe.Pointer {
if (num_events_in_wait_list == 0 && event_wait_list != nil) ||
(num_events_in_wait_list != 0 && event_wait_list == nil) ||
int(num_events_in_wait_list) != len(event_wait_list) {
if errcode_ret != nil {
*errcode_ret = CL_INVALID_EVENT_WAIT_LIST
}
return nil
}
var c_event C.cl_event
var c_errcode_ret C.cl_int
var c_ptr_ret unsafe.Pointer
if num_events_in_wait_list != 0 {
var c_event_wait_list []C.cl_event
c_event_wait_list = make([]C.cl_event, num_events_in_wait_list)
for i := 0; i < int(num_events_in_wait_list); i++ {
c_event_wait_list[i] = event_wait_list[i].cl_event
}
c_ptr_ret = C.clEnqueueMapBuffer(command_queue.cl_command_queue,
buffer.cl_mem,
C.cl_bool(blocking_map),
C.cl_map_flags(map_flags),
C.size_t(offset),
C.size_t(cb),
C.cl_uint(num_events_in_wait_list),
&c_event_wait_list[0],
&c_event,
&c_errcode_ret)
} else {
c_ptr_ret = C.clEnqueueMapBuffer(command_queue.cl_command_queue,
buffer.cl_mem,
C.cl_bool(blocking_map),
C.cl_map_flags(map_flags),
C.size_t(offset),
C.size_t(cb),
0,
nil,
&c_event,
&c_errcode_ret)
}
if event != nil {
event.cl_event = c_event
}
if errcode_ret != nil {
*errcode_ret = CL_int(c_errcode_ret)
}
return c_ptr_ret
}
