compute-runtime/runtime/command_queue/command_queue.cpp

/*
 * Copyright (c) 2018, Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#include "runtime/command_queue/command_queue.h"
#include "runtime/command_queue/command_queue_hw.h"
#include "runtime/command_stream/command_stream_receiver.h"
#include "runtime/context/context.h"
#include "runtime/device/device.h"
#include "runtime/device_queue/device_queue.h"
#include "runtime/event/event.h"
#include "runtime/event/event_builder.h"
#include "runtime/gtpin/gtpin_notify.h"
#include "runtime/helpers/aligned_memory.h"
#include "runtime/helpers/array_count.h"
#include "runtime/helpers/get_info.h"
#include "runtime/helpers/options.h"
#include "runtime/helpers/ptr_math.h"
#include "runtime/mem_obj/buffer.h"
#include "runtime/mem_obj/image.h"
#include "runtime/helpers/surface_formats.h"
#include "runtime/memory_manager/memory_manager.h"
#include "runtime/helpers/string.h"
#include "CL/cl_ext.h"
#include "runtime/utilities/api_intercept.h"
#include "runtime/helpers/convert_color.h"
#include "runtime/helpers/queue_helpers.h"
#include <map>

namespace OCLRT {

// Global table of create functions
CommandQueueCreateFunc commandQueueFactory[IGFX_MAX_CORE] = {};

CommandQueue *CommandQueue::create(Context *context,
                                   Device *device,
                                   const cl_queue_properties *properties,
                                   cl_int &retVal) {
    retVal = CL_SUCCESS;

    auto funcCreate = commandQueueFactory[device->getRenderCoreFamily()];
    DEBUG_BREAK_IF(nullptr == funcCreate);

    return funcCreate(context, device, properties);
}

CommandQueue::CommandQueue() : CommandQueue(nullptr, nullptr, 0) {
}

CommandQueue::CommandQueue(Context *context,
                           Device *deviceId,
                           const cl_queue_properties *properties) : taskCount(0),
                                                                    taskLevel(0),
                                                                    virtualEvent(nullptr),
                                                                    context(context),
                                                                    device(deviceId),
                                                                    priority(QueuePriority::MEDIUM),
                                                                    throttle(QueueThrottle::MEDIUM),
                                                                    perfCountersEnabled(false),
                                                                    perfCountersConfig(UINT32_MAX),
                                                                    perfCountersUserRegistersNumber(0),
                                                                    perfConfigurationData(nullptr),
                                                                    perfCountersRegsCfgHandle(0),
                                                                    perfCountersRegsCfgPending(false),
                                                                    commandStream(nullptr) {
    if (context) {
        context->incRefInternal();
    }
    for (int i = 0; i < NUM_HEAPS; ++i) {
        indirectHeap[i] = nullptr;
    }
    commandQueueProperties = getCmdQueueProperties<cl_command_queue_properties>(properties);
    flushStamp.reset(new FlushStampTracker(true));
}

CommandQueue::~CommandQueue() {
    if (virtualEvent) {
        UNRECOVERABLE_IF(this->virtualEvent->getCommandQueue() != this && this->virtualEvent->getCommandQueue() != nullptr);
        virtualEvent->setCurrentCmdQVirtualEvent(false);
        virtualEvent->decRefInternal();
    }

    if (device) {
        auto memoryManager = device->getMemoryManager();
        DEBUG_BREAK_IF(nullptr == memoryManager);

        if (commandStream && commandStream->getGraphicsAllocation()) {
            memoryManager->storeAllocation(std::unique_ptr<GraphicsAllocation>(commandStream->getGraphicsAllocation()), REUSABLE_ALLOCATION);
            commandStream->replaceGraphicsAllocation(nullptr);
        }
        delete commandStream;

        for (int i = 0; i < NUM_HEAPS; ++i) {
            if (indirectHeap[i] != nullptr) {
                auto allocation = indirectHeap[i]->getGraphicsAllocation();
                if (allocation != nullptr) {
                    memoryManager->storeAllocation(std::unique_ptr<GraphicsAllocation>(allocation), REUSABLE_ALLOCATION);
                }
                delete indirectHeap[i];
            }
        }
        if (perfConfigurationData) {
            delete perfConfigurationData;
        }
        if (this->perfCountersEnabled) {
            device->getPerformanceCounters()->shutdown();
        }
    }

    //for normal queue, decrement ref count on context
    //special queue is owned by context so ref count doesn't have to be decremented
    if (context && !isSpecialCommandQueue) {
        context->decRefInternal();
    }
}

uint32_t CommandQueue::getHwTag() const {
    uint32_t tag = *getHwTagAddress();
    return tag;
}

volatile uint32_t *CommandQueue::getHwTagAddress() const {
    DEBUG_BREAK_IF(!this->device);
    auto &commandStreamReceiver = device->getCommandStreamReceiver();
    auto tag_address = commandStreamReceiver.getTagAddress();
    commandStreamReceiver.makeCoherent((void *)tag_address, sizeof(tag_address));
    return tag_address;
}

bool CommandQueue::isCompleted(uint32_t taskCount) const {
    uint32_t tag = getHwTag();
    DEBUG_BREAK_IF(tag == Event::eventNotReady);
    return tag >= taskCount;
}

void CommandQueue::waitUntilComplete(uint32_t taskCountToWait, FlushStamp flushStampToWait) {
    WAIT_ENTER()

    DBG_LOG(LogTaskCounts, __FUNCTION__, "Waiting for taskCount:", taskCountToWait);
    DBG_LOG(LogTaskCounts, __FUNCTION__, "Line: ", __LINE__, "Current taskCount:", getHwTag());

    device->getCommandStreamReceiver().waitForTaskCountWithKmdNotifyFallback(taskCountToWait, flushStampToWait);

    DEBUG_BREAK_IF(getHwTag() < taskCountToWait);
    latestTaskCountWaited = taskCountToWait;
    WAIT_LEAVE()
}

bool CommandQueue::isQueueBlocked() {
    TakeOwnershipWrapper<CommandQueue> takeOwnershipWrapper(*this);
    //check if we have user event and if so, if it is in blocked state.
    if (this->virtualEvent) {
        if (this->virtualEvent->peekExecutionStatus() <= CL_COMPLETE) {
            UNRECOVERABLE_IF(this->virtualEvent == nullptr);

            if (this->virtualEvent->isStatusCompletedByTermination() == false) {
                taskCount = this->virtualEvent->peekTaskCount();
                flushStamp->setStamp(this->virtualEvent->flushStamp->peekStamp());
                taskLevel = this->virtualEvent->taskLevel;
                // If this isn't an OOQ, update the taskLevel for the queue
                if (!isOOQEnabled()) {
                    taskLevel++;
                }
            } else {
                //at this point we may reset queue TaskCount, since all command previous to this were aborted
                taskCount = 0;
                flushStamp->setStamp(0);
                taskLevel = getDevice().getCommandStreamReceiver().peekTaskLevel();
            }

            DebugManager.log(DebugManager.flags.EventsDebugEnable.get(), "isQueueBlocked taskLevel change from", taskLevel, "to new from virtualEvent", this->virtualEvent, "new tasklevel", this->virtualEvent->taskLevel.load());

            //close the access to virtual event, driver added only 1 ref count.
            this->virtualEvent->decRefInternal();
            this->virtualEvent = nullptr;
            return false;
        }
        return true;
    }
    return false;
}

cl_int CommandQueue::getCommandQueueInfo(cl_command_queue_info paramName,
                                         size_t paramValueSize,
                                         void *paramValue,
                                         size_t *paramValueSizeRet) {
    return getQueueInfo<CommandQueue>(this, paramName, paramValueSize, paramValue, paramValueSizeRet);
}

uint32_t CommandQueue::getTaskLevelFromWaitList(uint32_t taskLevel,
                                                cl_uint numEventsInWaitList,
                                                const cl_event *eventWaitList) {
    for (auto iEvent = 0u; iEvent < numEventsInWaitList; ++iEvent) {
        auto pEvent = (Event *)(eventWaitList[iEvent]);
        uint32_t eventTaskLevel = pEvent->taskLevel;
        taskLevel = std::max(taskLevel, eventTaskLevel);
    }
    return taskLevel;
}

size_t CommandQueue::getInstructionHeapReservedBlockSize() const {
    return alignUp(device->getCommandStreamReceiver().getInstructionHeapCmdStreamReceiverReservedSize(),
                   MemoryConstants::cacheLineSize);
}

IndirectHeap &CommandQueue::getIndirectHeap(IndirectHeap::Type heapType,
                                            size_t minRequiredSize) {
    DEBUG_BREAK_IF(static_cast<uint32_t>(heapType) >= ARRAY_COUNT(indirectHeap));
    auto &heap = indirectHeap[heapType];
    GraphicsAllocation *heapMemory = nullptr;

    DEBUG_BREAK_IF(nullptr == device);
    auto memoryManager = device->getMemoryManager();
    DEBUG_BREAK_IF(nullptr == memoryManager);

    if (heap)
        heapMemory = heap->getGraphicsAllocation();

    if (heap && heap->getAvailableSpace() < minRequiredSize && heapMemory) {
        memoryManager->storeAllocation(std::unique_ptr<GraphicsAllocation>(heapMemory), REUSABLE_ALLOCATION);
        heapMemory = nullptr;
    }

    if (!heapMemory) {
        size_t reservedSize = 0;
        auto finalHeapSize = defaultHeapSize;
        if (heapType == IndirectHeap::INSTRUCTION) {
            finalHeapSize = optimalInstructionHeapSize;
            reservedSize = getInstructionHeapReservedBlockSize();
        }

        minRequiredSize += reservedSize;

        finalHeapSize = alignUp(std::max(finalHeapSize, minRequiredSize), MemoryConstants::pageSize);

        heapMemory = memoryManager->obtainReusableAllocation(finalHeapSize).release();

        if (!heapMemory) {
            heapMemory = memoryManager->allocateGraphicsMemory(finalHeapSize, MemoryConstants::pageSize);
        } else {
            finalHeapSize = std::max(heapMemory->getUnderlyingBufferSize(), finalHeapSize);
        }

        if (IndirectHeap::SURFACE_STATE == heapType) {
            DEBUG_BREAK_IF(minRequiredSize > maxSshSize);
            finalHeapSize = maxSshSize;
        }

        if (heap) {
            heap->replaceBuffer(heapMemory->getUnderlyingBuffer(), finalHeapSize);
            heap->replaceGraphicsAllocation(heapMemory);
        } else {
            heap = new IndirectHeap(heapMemory);
            heap->overrideMaxSize(finalHeapSize);
        }

        if (heapType == IndirectHeap::INSTRUCTION) {
            device->getCommandStreamReceiver().initializeInstructionHeapCmdStreamReceiverReservedBlock(*heap);
            heap->align(MemoryConstants::cacheLineSize);
        }
    }

    return *heap;
}

void CommandQueue::releaseIndirectHeap(IndirectHeap::Type heapType) {
    DEBUG_BREAK_IF(static_cast<uint32_t>(heapType) >= ARRAY_COUNT(indirectHeap));
    auto &heap = indirectHeap[heapType];

    DEBUG_BREAK_IF(nullptr == device);
    auto memoryManager = device->getMemoryManager();
    DEBUG_BREAK_IF(nullptr == memoryManager);

    if (heap) {
        auto heapMemory = heap->getGraphicsAllocation();
        if (heapMemory != nullptr)
            memoryManager->storeAllocation(std::unique_ptr<GraphicsAllocation>(heapMemory), REUSABLE_ALLOCATION);
        heap->replaceBuffer(nullptr, 0);
        heap->replaceGraphicsAllocation(nullptr);
    }
}

LinearStream &CommandQueue::getCS(size_t minRequiredSize) {
    DEBUG_BREAK_IF(nullptr == device);
    auto &commandStreamReceiver = device->getCommandStreamReceiver();
    auto memoryManager = commandStreamReceiver.getMemoryManager();
    DEBUG_BREAK_IF(nullptr == memoryManager);

    if (!commandStream) {
        commandStream = new LinearStream(nullptr);
    }

    // Make sure we have enough room for any CSR additions
    minRequiredSize += CSRequirements::minCommandQueueCommandStreamSize;

    if (commandStream->getAvailableSpace() < minRequiredSize) {
        // If not, allocate a new block. allocate full pages
        minRequiredSize = alignUp(minRequiredSize, MemoryConstants::pageSize);

        auto requiredSize = minRequiredSize + CSRequirements::csOverfetchSize;

        GraphicsAllocation *allocation = memoryManager->obtainReusableAllocation(requiredSize).release();

        if (!allocation) {
            allocation = memoryManager->allocateGraphicsMemory(requiredSize, MemoryConstants::pageSize);
        }

        // Deallocate the old block, if not null
        auto oldAllocation = commandStream->getGraphicsAllocation();

        if (oldAllocation) {
            memoryManager->storeAllocation(std::unique_ptr<GraphicsAllocation>(oldAllocation), REUSABLE_ALLOCATION);
        }
        commandStream->replaceBuffer(allocation->getUnderlyingBuffer(), minRequiredSize - CSRequirements::minCommandQueueCommandStreamSize);
        commandStream->replaceGraphicsAllocation(allocation);
    }

    return *commandStream;
}

cl_int CommandQueue::enqueueAcquireSharedObjects(cl_uint numObjects, const cl_mem *memObjects, cl_uint numEventsInWaitList, const cl_event *eventWaitList, cl_event *oclEvent, cl_uint cmdType) {
    if ((memObjects == nullptr && numObjects != 0) || (memObjects != nullptr && numObjects == 0)) {
        return CL_INVALID_VALUE;
    }

    for (unsigned int object = 0; object < numObjects; object++) {
        auto memObject = castToObject<MemObj>(memObjects[object]);
        if (memObject == nullptr || memObject->peekSharingHandler() == nullptr) {
            return CL_INVALID_MEM_OBJECT;
        }

        memObject->peekSharingHandler()->acquire(memObject);
        memObject->acquireCount++;
    }
    auto status = enqueueMarkerWithWaitList(
        numEventsInWaitList,
        eventWaitList,
        oclEvent);

    if (oclEvent) {
        castToObjectOrAbort<Event>(*oclEvent)->setCmdType(cmdType);
    }

    return status;
}

cl_int CommandQueue::enqueueReleaseSharedObjects(cl_uint numObjects, const cl_mem *memObjects, cl_uint numEventsInWaitList, const cl_event *eventWaitList, cl_event *oclEvent, cl_uint cmdType) {
    if ((memObjects == nullptr && numObjects != 0) || (memObjects != nullptr && numObjects == 0)) {
        return CL_INVALID_VALUE;
    }

    for (unsigned int object = 0; object < numObjects; object++) {
        auto memObject = castToObject<MemObj>(memObjects[object]);
        if (memObject == nullptr || memObject->peekSharingHandler() == nullptr) {
            return CL_INVALID_MEM_OBJECT;
        }

        memObject->peekSharingHandler()->release(memObject);
        DEBUG_BREAK_IF(memObject->acquireCount <= 0);
        memObject->acquireCount--;
    }
    auto status = enqueueMarkerWithWaitList(
        numEventsInWaitList,
        eventWaitList,
        oclEvent);

    if (oclEvent) {
        castToObjectOrAbort<Event>(*oclEvent)->setCmdType(cmdType);
    }
    return status;
}

void CommandQueue::updateFromCompletionStamp(const CompletionStamp &completionStamp) {
    DEBUG_BREAK_IF(this->taskLevel > completionStamp.taskLevel);
    DEBUG_BREAK_IF(this->taskCount > completionStamp.taskCount);
    if (completionStamp.taskCount != Event::eventNotReady) {
        taskCount = completionStamp.taskCount;
    }
    flushStamp->setStamp(completionStamp.flushStamp);
    this->taskLevel = completionStamp.taskLevel;
}

void CommandQueue::flushWaitList(
    cl_uint numEventsInWaitList,
    const cl_event *eventWaitList,
    bool ndRangeKernel) {

    bool isQBlocked = false;

    //as long as queue is blocked we need to stall.
    if (!isOOQEnabled()) {
        while ((isQBlocked = isQueueBlocked()))
            ;
    }
    device->getCommandStreamReceiver().flushBatchedSubmissions();
}

bool CommandQueue::setPerfCountersEnabled(bool perfCountersEnabled, cl_uint configuration) {
    DEBUG_BREAK_IF(device == nullptr);
    if (perfCountersEnabled == this->perfCountersEnabled) {
        return true;
    }
    auto perfCounters = device->getPerformanceCounters();
    if (perfCountersEnabled) {
        perfCounters->enable();
        if (!perfCounters->isAvailable()) {
            perfCounters->shutdown();
            return false;
        }
        perfConfigurationData = perfCounters->getPmRegsCfg(configuration);
        if (perfConfigurationData == nullptr) {
            perfCounters->shutdown();
            return false;
        }
        InstrReadRegsCfg *pUserCounters = &perfConfigurationData->ReadRegs;
        for (uint32_t i = 0; i < pUserCounters->RegsCount; ++i) {
            perfCountersUserRegistersNumber++;
            if (pUserCounters->Reg[i].BitSize > 32) {
                perfCountersUserRegistersNumber++;
            }
        }
    } else {
        if (perfCounters->isAvailable()) {
            perfCounters->shutdown();
        }
    }
    this->perfCountersConfig = configuration;
    this->perfCountersEnabled = perfCountersEnabled;

    return true;
}

PerformanceCounters *CommandQueue::getPerfCounters() {
    return device->getPerformanceCounters();
}

bool CommandQueue::sendPerfCountersConfig() {
    return getPerfCounters()->sendPmRegsCfgCommands(perfConfigurationData, &perfCountersRegsCfgHandle, &perfCountersRegsCfgPending);
}

cl_int CommandQueue::enqueueWriteMemObjForUnmap(MemObj *memObj, void *mappedPtr, EventsRequest &eventsRequest) {
    cl_int retVal;
    if (memObj->peekClMemObjType() == CL_MEM_OBJECT_BUFFER) {
        auto buffer = castToObject<Buffer>(memObj);
        retVal = enqueueWriteBuffer(buffer, CL_TRUE, buffer->getMappedOffset()[0], buffer->getMappedSize()[0], mappedPtr,
                                    eventsRequest.numEventsInWaitList, eventsRequest.eventWaitList, eventsRequest.outEvent);
    } else {
        auto image = castToObject<Image>(memObj);
        retVal = enqueueWriteImage(image, CL_FALSE, &image->getMappedOffset()[0], &image->getMappedSize()[0],
                                   image->getHostPtrRowPitch(), image->getHostPtrSlicePitch(), mappedPtr,
                                   eventsRequest.numEventsInWaitList, eventsRequest.eventWaitList, eventsRequest.outEvent);
        bool mustCallFinish = true;
        if (!(image->getFlags() & CL_MEM_USE_HOST_PTR)) {
            mustCallFinish = true;
        } else {
            mustCallFinish = (CommandQueue::getTaskLevelFromWaitList(this->taskLevel, eventsRequest.numEventsInWaitList, eventsRequest.eventWaitList) != Event::eventNotReady);
        }
        if (mustCallFinish) {
            finish(true);
        }
    }

    return retVal;
}

void *CommandQueue::enqueueReadMemObjForMap(TransferProperties &transferProperties, EventsRequest &eventsRequest, cl_int &errcodeRet) {
    void *returnPtr = ptrOffset(transferProperties.memObj->getBasePtrForMap(),
                                transferProperties.memObj->calculateOffsetForMapping(transferProperties.offsetPtr));

    if (transferProperties.memObj->peekClMemObjType() == CL_MEM_OBJECT_BUFFER) {
        auto buffer = castToObject<Buffer>(transferProperties.memObj);
        errcodeRet = enqueueReadBuffer(buffer, transferProperties.blocking, *transferProperties.offsetPtr, *transferProperties.sizePtr, returnPtr,
                                       eventsRequest.numEventsInWaitList, eventsRequest.eventWaitList, eventsRequest.outEvent);
    } else {
        auto image = castToObject<Image>(transferProperties.memObj);
        errcodeRet = enqueueReadImage(image, transferProperties.blocking, transferProperties.offsetPtr, transferProperties.sizePtr,
                                      image->getHostPtrRowPitch(), image->getHostPtrSlicePitch(), returnPtr, eventsRequest.numEventsInWaitList,
                                      eventsRequest.eventWaitList, eventsRequest.outEvent);
    }

    if (errcodeRet == CL_SUCCESS) {
        transferProperties.memObj->setMapInfo(returnPtr, transferProperties.sizePtr, transferProperties.offsetPtr);
    } else {
        returnPtr = nullptr;
    }
    return returnPtr;
}

void *CommandQueue::enqueueMapMemObject(TransferProperties &transferProperties, EventsRequest &eventsRequest, cl_int &errcodeRet) {
    if (transferProperties.memObj->mappingOnCpuAllowed()) {
        return cpuDataTransferHandler(transferProperties, eventsRequest, errcodeRet);
    } else {
        return enqueueReadMemObjForMap(transferProperties, eventsRequest, errcodeRet);
    }
}

cl_int CommandQueue::enqueueUnmapMemObject(TransferProperties &transferProperties, EventsRequest &eventsRequest) {
    cl_int retVal;
    if (transferProperties.memObj->mappingOnCpuAllowed()) {
        cpuDataTransferHandler(transferProperties, eventsRequest, retVal);
    } else {
        retVal = enqueueWriteMemObjForUnmap(transferProperties.memObj, transferProperties.ptr, eventsRequest);
    }
    return retVal;
}

void *CommandQueue::enqueueMapBuffer(Buffer *buffer, cl_bool blockingMap,
                                     cl_map_flags mapFlags, size_t offset,
                                     size_t size, cl_uint numEventsInWaitList,
                                     const cl_event *eventWaitList, cl_event *event,
                                     cl_int &errcodeRet) {

    TransferProperties transferProperties(buffer, CL_COMMAND_MAP_BUFFER, blockingMap != CL_FALSE, &offset, &size, nullptr);
    EventsRequest eventsRequest(numEventsInWaitList, eventWaitList, event);

    return enqueueMapMemObject(transferProperties, eventsRequest, errcodeRet);
}

void *CommandQueue::enqueueMapImage(Image *image, cl_bool blockingMap,
                                    cl_map_flags mapFlags, const size_t *origin,
                                    const size_t *region, size_t *imageRowPitch,
                                    size_t *imageSlicePitch,
                                    cl_uint numEventsInWaitList,
                                    const cl_event *eventWaitList, cl_event *event,
                                    cl_int &errcodeRet) {

    TransferProperties transferProperties(image, CL_COMMAND_MAP_IMAGE, blockingMap != CL_FALSE,
                                          const_cast<size_t *>(origin), const_cast<size_t *>(region), nullptr);
    EventsRequest eventsRequest(numEventsInWaitList, eventWaitList, event);

    if (image->isMemObjZeroCopy() && image->mappingOnCpuAllowed()) {
        GetInfoHelper::set(imageSlicePitch, image->getImageDesc().image_slice_pitch);
        GetInfoHelper::set(imageRowPitch, image->getImageDesc().image_row_pitch);
    } else {
        GetInfoHelper::set(imageSlicePitch, image->getHostPtrSlicePitch());
        GetInfoHelper::set(imageRowPitch, image->getHostPtrRowPitch());
    }

    return enqueueMapMemObject(transferProperties, eventsRequest, errcodeRet);
}

cl_int CommandQueue::enqueueUnmapMemObject(MemObj *memObj, void *mappedPtr, cl_uint numEventsInWaitList, const cl_event *eventWaitList, cl_event *event) {

    TransferProperties transferProperties(memObj, CL_COMMAND_UNMAP_MEM_OBJECT, false, nullptr, nullptr, mappedPtr);
    EventsRequest eventsRequest(numEventsInWaitList, eventWaitList, event);

    return enqueueUnmapMemObject(transferProperties, eventsRequest);
}

void CommandQueue::enqueueBlockedMapUnmapOperation(const cl_event *eventWaitList,
                                                   size_t numEventsInWaitlist,
                                                   MapOperationType opType,
                                                   MemObj *memObj,
                                                   EventBuilder &externalEventBuilder) {
    auto &commandStreamReceiver = device->getCommandStreamReceiver();

    EventBuilder internalEventBuilder;
    EventBuilder *eventBuilder;
    // check if event will be exposed externally
    if (externalEventBuilder.getEvent()) {
        externalEventBuilder.getEvent()->incRefInternal();
        eventBuilder = &externalEventBuilder;
    } else {
        // it will be an internal event
        internalEventBuilder.create<VirtualEvent>(this, context);
        eventBuilder = &internalEventBuilder;
    }

    //store task data in event
    auto cmd = std::unique_ptr<Command>(new CommandMapUnmap(opType, *memObj, commandStreamReceiver, *this));
    eventBuilder->getEvent()->setCommand(std::move(cmd));

    //bind output event with input events
    eventBuilder->addParentEvents(ArrayRef<const cl_event>(eventWaitList, numEventsInWaitlist));
    eventBuilder->addParentEvent(this->virtualEvent);
    eventBuilder->finalize();

    if (this->virtualEvent) {
        this->virtualEvent->setCurrentCmdQVirtualEvent(false);
        this->virtualEvent->decRefInternal();
    }
    this->virtualEvent = eventBuilder->getEvent();
}

} // namespace OCLRT