/* Copyright (c) 2015 - 2022 Advanced Micro Devices, Inc.

 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 <hip/hip_runtime.h>
#include "hip_internal.hpp"
#include "hip_event.hpp"
#include "thread/monitor.hpp"
#include "hip_prof_api.h"
#include <atomic>

namespace hip {

// ================================================================================================
Stream::Stream(hip::Device* dev, Priority p, unsigned int f, bool null_stream,
               const std::vector<uint32_t>& cuMask, hipStreamCaptureStatus captureStatus)
    : amd::HostQueue(*dev->asContext(), *dev->devices()[0], 0, amd::CommandQueue::RealTimeDisabled,
                     convertToQueuePriority(p), cuMask),
      lock_("Stream Callback lock"),
      device_(dev),
      priority_(p),
      flags_(f),
      null_(null_stream),
      cuMask_(cuMask),
      captureStatus_(captureStatus),
      originStream_(false),
      captureID_(0) {
  device_->AddStream(this);
}

// ================================================================================================
hipError_t Stream::EndCapture() {
  for (auto event : captureEvents_) {
    hip::Event* e = reinterpret_cast<hip::Event*>(event);
    e->SetCaptureStream(nullptr);
  }
  for (auto stream : parallelCaptureStreams_) {
    hip::Stream* s = reinterpret_cast<hip::Stream*>(stream);
    hipError_t err = s->EndCapture();
    assert(err == hipSuccess);
  }
  captureStatus_ = hipStreamCaptureStatusNone;
  pCaptureGraph_ = nullptr;
  originStream_ = false;
  parentStream_ = nullptr;
  lastCapturedNodes_.clear();
  parallelCaptureStreams_.clear();
  captureEvents_.clear();

  return hipSuccess;
}

// ================================================================================================
bool Stream::Create() {
  return create();
}

// ================================================================================================
void Stream::Destroy(hip::Stream* stream) {
  stream->device().removeFromActiveQueues(stream);
  stream->device_->RemoveStream(stream);
  stream->release();
  stream = nullptr;
}

// ================================================================================================
bool Stream::terminate() {
  HostQueue::terminate();
  return true;
}
// ================================================================================================
bool isValid(hipStream_t& stream) {
  // NULL stream is always valid
  if (stream == nullptr || stream == hipStreamLegacy) {
    return true;
  }

  if (hipStreamPerThread == stream) {
    getStreamPerThread(stream);
  }

  hip::Stream* s = reinterpret_cast<hip::Stream*>(stream);
  for (auto& device : g_devices) {
    if (device->StreamExists(s)) {
      return true;
    }
  }
  return false;
}

// ================================================================================================
int Stream::DeviceId() const {
  return device_->deviceId();
}

// ================================================================================================
int Stream::DeviceId(const hipStream_t hStream) {
  // Copying locally into non-const variable just to get const away
  hipStream_t inputStream = hStream;
  if (!hip::isValid(inputStream)) {
    //return invalid device id
    return -1;
  }
  bool isNullOrLegacyStream = (hStream == nullptr || hStream == hipStreamLegacy);
  hip::Stream* s = reinterpret_cast<hip::Stream*>(inputStream);
  int deviceId = isNullOrLegacyStream ? ihipGetDevice() : s->DeviceId();
  assert(deviceId >= 0 && deviceId < static_cast<int>(g_devices.size()));
  return deviceId;
}

// ================================================================================================

// ================================================================================================
bool Stream::StreamCaptureBlocking() {
  for (auto& device : g_devices) {
    if (device->StreamCaptureBlocking()) {
      return true;
    }
  }
  return false;
}

bool Stream::StreamCaptureOngoing(hipStream_t hStream) {
  if (hStream == nullptr || hStream == hipStreamLegacy) {
    return false;
  }

  hip::Stream* s = reinterpret_cast<hip::Stream*>(hStream);
  if (s->GetCaptureStatus() == hipStreamCaptureStatusNone) {
    // If current thread is capturing in relaxed mode
    if (hip::tls.stream_capture_mode_ == hipStreamCaptureModeRelaxed) {
      return false;
    }
    // If any stream in current/concurrent thread is capturing in global mode
    amd::ScopedLock lock(g_captureStreamsLock);
    if (!g_captureStreams.empty()) {
      for (auto stream : hip::g_captureStreams) {
        stream->SetCaptureStatus(hipStreamCaptureStatusInvalidated);
      }
      return true;
    }
    // If any stream in current thread is capturing in ThreadLocal mode
    if (!hip::tls.capture_streams_.empty()) {
      for (auto stream : hip::tls.capture_streams_) {
        stream->SetCaptureStatus(hipStreamCaptureStatusInvalidated);
      }
      return true;
    }
    return false;
  } else if (s->GetCaptureStatus() == hipStreamCaptureStatusActive) {
    s->SetCaptureStatus(hipStreamCaptureStatusInvalidated);
    return true;
  } else if (s->GetCaptureStatus() == hipStreamCaptureStatusInvalidated) {
    return true;
  }
  return false;
}

// ================================================================================================
void CL_CALLBACK ihipStreamCallback(cl_event event, cl_int command_exec_status, void* user_data) {
  StreamCallback* cbo = reinterpret_cast<StreamCallback*>(user_data);
  cbo->callback();
  delete cbo;
}

// ================================================================================================
static hipError_t ihipStreamCreate(hipStream_t* stream,
                                  unsigned int flags, hip::Stream::Priority priority,
                                  const std::vector<uint32_t>& cuMask = {}) {
  if (flags != hipStreamDefault && flags != hipStreamNonBlocking) {
    return hipErrorInvalidValue;
  }
  hip::Stream* hStream = new hip::Stream(hip::getCurrentDevice(), priority, flags, false, cuMask);

  if (hStream == nullptr) {
    return hipErrorOutOfMemory;
  }
  else if (!hStream->Create()) {
    hip::Stream::Destroy(hStream);
    return hipErrorOutOfMemory;
  }

  *stream = reinterpret_cast<hipStream_t>(hStream);

  return hipSuccess;
}

// ================================================================================================

stream_per_thread::stream_per_thread() {
  m_streams.resize(g_devices.size());
  for (auto &stream : m_streams) {
    stream = nullptr;
  }
}

stream_per_thread::~stream_per_thread() {
  for (auto &stream:m_streams) {
    if (stream != nullptr && hip::isValid(stream)) {
      hip::Stream::Destroy(reinterpret_cast<hip::Stream*>(stream));
      stream = nullptr;
    }
  }
}

hipStream_t stream_per_thread::get() {
  hip::Device* device = hip::getCurrentDevice();
  int currDev = device->deviceId();
  // This is to make sure m_streams is not empty
  if (m_streams.empty()) {
    m_streams.resize(g_devices.size());
    for (auto &stream : m_streams) {
      stream = nullptr;
    }
  }
  // There is a scenario where hipResetDevice destroys stream per thread
  // hence isValid check is required to make sure only valid stream is used
  if (m_streams[currDev] == nullptr || !hip::isValid(m_streams[currDev])) {
    hipError_t status = ihipStreamCreate(&m_streams[currDev], hipStreamDefault,
                                         hip::Stream::Priority::Normal);
    if (status != hipSuccess) {
      DevLogError("Stream creation failed");
    }
  }
  return m_streams[currDev];
}

void stream_per_thread::clear_spt() {
  if (!m_streams.empty()) {
    m_streams[getCurrentDevice()->deviceId()] = nullptr;
  }
}


// ================================================================================================
void getStreamPerThread(hipStream_t& stream) {
  if (stream == hipStreamPerThread) {
    stream = hip::tls.stream_per_thread_obj_.get();
  }
}

// ================================================================================================
hipStream_t getPerThreadDefaultStream() {
  // Function to get per thread default stream
  // More about the usecases yet to come
  hipStream_t stream = hipStreamPerThread;
  getStreamPerThread(stream);
  return stream;
}

// ================================================================================================
hipError_t hipStreamCreateWithFlags(hipStream_t *stream, unsigned int flags) {
  HIP_INIT_API(hipStreamCreateWithFlags, stream, flags);

  if (stream == nullptr) {
    HIP_RETURN(hipErrorInvalidValue);
  }

  HIP_RETURN(ihipStreamCreate(stream, flags, hip::Stream::Priority::Normal), *stream);
}

// ================================================================================================
hipError_t hipStreamCreate(hipStream_t *stream) {
  HIP_INIT_API(hipStreamCreate, stream);

  if (stream == nullptr) {
    HIP_RETURN(hipErrorInvalidValue);
  }

  HIP_RETURN(ihipStreamCreate(stream, hipStreamDefault, hip::Stream::Priority::Normal), *stream);
}

// ================================================================================================
hipError_t hipStreamCreateWithPriority(hipStream_t* stream, unsigned int flags, int priority) {
  HIP_INIT_API(hipStreamCreateWithPriority, stream, flags, priority);

  if (stream == nullptr) {
    HIP_RETURN(hipErrorInvalidValue);
  }

  hip::Stream::Priority streamPriority;
  if (priority <= hip::Stream::Priority::High) {
    streamPriority = hip::Stream::Priority::High;
  } else if (priority >= hip::Stream::Priority::Low) {
    streamPriority = hip::Stream::Priority::Low;
  } else {
    streamPriority = hip::Stream::Priority::Normal;
  }

  HIP_RETURN(ihipStreamCreate(stream, flags, streamPriority), *stream);
}

// ================================================================================================
hipError_t hipDeviceGetStreamPriorityRange(int* leastPriority, int* greatestPriority) {
  HIP_INIT_API(hipDeviceGetStreamPriorityRange, leastPriority, greatestPriority);

  if (leastPriority != nullptr) {
    *leastPriority = hip::Stream::Priority::Low;
  }
  if (greatestPriority != nullptr) {
    *greatestPriority = hip::Stream::Priority::High;
  }
  HIP_RETURN(hipSuccess);
}

// ================================================================================================
hipError_t hipStreamGetFlags_common(hipStream_t stream, unsigned int* flags) {
  if ((flags != nullptr) && (stream != nullptr)) {
    if (!hip::isValid(stream)) {
      return hipErrorContextIsDestroyed;
    }
    *flags = reinterpret_cast<hip::Stream*>(stream)->Flags();
  } else {
    return hipErrorInvalidValue;
  }

  return hipSuccess;
}

// ================================================================================================
hipError_t hipStreamGetFlags(hipStream_t stream, unsigned int* flags) {
  HIP_INIT_API(hipStreamGetFlags, stream, flags);
  HIP_RETURN(hipStreamGetFlags_common(stream, flags));
}

// ================================================================================================
hipError_t hipStreamGetFlags_spt(hipStream_t stream, unsigned int* flags) {
  HIP_INIT_API(hipStreamGetFlags, stream, flags);
  PER_THREAD_DEFAULT_STREAM(stream);
  HIP_RETURN(hipStreamGetFlags_common(stream, flags));
}

// ================================================================================================
hipError_t hipStreamSynchronize_common(hipStream_t stream) {
  if (!hip::isValid(stream)) {
    HIP_RETURN(hipErrorContextIsDestroyed);
  }
  if (stream != nullptr && stream != hipStreamLegacy) {
    // If still capturing return error
    if (hip::Stream::StreamCaptureOngoing(stream) == true) {
      HIP_RETURN(hipErrorStreamCaptureUnsupported);
    }
  }

  if (stream == nullptr) {
    // Do cpu wait on null stream and only on blocking streams
    constexpr bool WaitblockingStreamOnly = true;
    getCurrentDevice()->SyncAllStreams(true, WaitblockingStreamOnly);

    // Release freed memory for all memory pools on the device
    getCurrentDevice()->ReleaseFreedMemory();
  } else {
    constexpr bool wait = false;
    auto hip_stream = hip::getStream(stream, wait);

    // Wait for the current host queue
    hip_stream->finish();
    // Release freed memory for all memory pools on the device
    hip_stream->GetDevice()->ReleaseFreedMemory();
  }
  return hipSuccess;
}

// ================================================================================================
hipError_t hipStreamSynchronize(hipStream_t stream) {
  HIP_INIT_API(hipStreamSynchronize, stream);
  HIP_RETURN(hipStreamSynchronize_common(stream));
}

// ================================================================================================
hipError_t hipStreamSynchronize_spt(hipStream_t stream) {
  HIP_INIT_API(hipStreamSynchronize, stream);
  PER_THREAD_DEFAULT_STREAM(stream);
  HIP_RETURN(hipStreamSynchronize_common(stream));
}

// ================================================================================================
hipError_t hipStreamDestroy(hipStream_t stream) {
  HIP_INIT_API(hipStreamDestroy, stream);

  if (stream == nullptr) {
    HIP_RETURN(hipErrorInvalidHandle);
  }
  if (stream == hipStreamPerThread) {
    HIP_RETURN(hipErrorInvalidResourceHandle);
  }
  if (!hip::isValid(stream)) {
    HIP_RETURN(hipErrorContextIsDestroyed);
  }
  hip::Stream* s = reinterpret_cast<hip::Stream*>(stream);
  if (s->GetCaptureStatus() != hipStreamCaptureStatusNone) {
    if (s->GetParentStream() != nullptr) {
      reinterpret_cast<hip::Stream*>(s->GetParentStream())->EraseParallelCaptureStream(stream);
    }
    auto error = s->EndCapture();
  }
  s->GetDevice()->RemoveStreamFromPools(s);

  {
    amd::ScopedLock lock(g_captureStreamsLock);
    const auto& g_it = std::find(g_captureStreams.begin(), g_captureStreams.end(), s);
    if (g_it != g_captureStreams.end()) {
      g_captureStreams.erase(g_it);
    }
  }
  {
    amd::ScopedLock lock(g_streamSetLock);
    const auto& g_it = std::find(g_allCapturingStreams.begin(), g_allCapturingStreams.end(), s);
    if (g_it != g_allCapturingStreams.end()) {
      g_allCapturingStreams.erase(g_it);
    }
  }
  const auto& l_it = std::find(hip::tls.capture_streams_.begin(),
                      hip::tls.capture_streams_.end(), s);
  if (l_it != hip::tls.capture_streams_.end()) {
    hip::tls.capture_streams_.erase(l_it);
  }
  hip::Stream::Destroy(s);

  HIP_RETURN(hipSuccess);
}

// ================================================================================================
void WaitThenDecrementSignal(hipStream_t stream, hipError_t status, void* user_data) {
  CallbackData* data =  reinterpret_cast<CallbackData*>(user_data);
  int offset = data->previous_read_index % IPC_SIGNALS_PER_EVENT;
  while (data->shmem->read_index < data->previous_read_index + IPC_SIGNALS_PER_EVENT &&
         data->shmem->signal[offset] != 0) {
    amd::Os::sleep(1);
  }
  delete data;
}

// ================================================================================================
hipError_t hipStreamWaitEvent_common(hipStream_t stream, hipEvent_t event, unsigned int flags) {
  hipError_t status = hipSuccess;
  if (event == nullptr || !hip::isValid(stream)) {
    return hipErrorInvalidHandle;
  }
  hip::Stream* waitStream = reinterpret_cast<hip::Stream*>(stream);
  hip::Event* e = reinterpret_cast<hip::Event*>(event);
  auto eventStreamHandle = reinterpret_cast<hipStream_t>(e->GetCaptureStream());
  // the stream associated with the device might have been destroyed
  if (!hip::isValid(eventStreamHandle)) {
    // Stream associated with the event has been released
    // meaning the event has been completed and we can resume the current stream
    return hipSuccess;
  }

  hip::Stream* eventStream = reinterpret_cast<hip::Stream*>(eventStreamHandle);
  if (eventStream != nullptr && eventStream->IsEventCaptured(event) == true) {
    ClPrint(amd::LOG_INFO, amd::LOG_API,
          "[hipGraph] Current capture node StreamWaitEvent on stream : %p, Event %p", stream,
          event);
    if (waitStream == nullptr) {
      return hipErrorInvalidHandle;
    }
    if (!waitStream->IsOriginStream()) {
      waitStream->SetCaptureGraph((eventStream)->GetCaptureGraph());
      waitStream->SetCaptureId((eventStream)->GetCaptureID());
      waitStream->SetCaptureMode((eventStream)->GetCaptureMode());
      waitStream->SetParentStream(reinterpret_cast<hipStream_t>(eventStream));
      eventStream->SetParallelCaptureStream(stream);
    }
    waitStream->AddCrossCapturedNode(e->GetNodesPrevToRecorded());
  } else {
    if (flags != 0) {
      return hipErrorInvalidValue;
    }
    if (eventStream != nullptr) {
      if (eventStream->GetCaptureStatus() == hipStreamCaptureStatusActive) {
        // If stream is capturing but event is not recorded on event's stream.
        return hipErrorStreamCaptureIsolation;
      }
      if ((waitStream != nullptr) && (eventStream->DeviceId() == waitStream->DeviceId())) {
        eventStream->GetDevice()->AddSafeStream(eventStream, waitStream);
      }
    }
    status = e->streamWait(stream, flags);
  }
  return status;
}

// ================================================================================================
hipError_t hipStreamWaitEvent(hipStream_t stream, hipEvent_t event, unsigned int flags) {
  HIP_INIT_API(hipStreamWaitEvent, stream, event, flags);
  HIP_RETURN(hipStreamWaitEvent_common(stream, event, flags));
}

// ================================================================================================
hipError_t hipStreamWaitEvent_spt(hipStream_t stream, hipEvent_t event, unsigned int flags) {
  HIP_INIT_API(hipStreamWaitEvent, stream, event, flags);
  PER_THREAD_DEFAULT_STREAM(stream);
  HIP_RETURN(hipStreamWaitEvent_common(stream, event, flags));
}

// ================================================================================================
hipError_t hipStreamQuery_common(hipStream_t stream) {
  if (!hip::isValid(stream)) {
    return hipErrorContextIsDestroyed;
  }
  if (stream != nullptr) {
    // If still capturing return error
    if (hip::Stream::StreamCaptureOngoing(stream) == true) {
      HIP_RETURN(hipErrorStreamCaptureUnsupported);
    }
  }
  bool wait = (stream == nullptr) ? true : false;
  hip::Stream* hip_stream = hip::getStream(stream, wait);

  if (hip_stream->vdev()->isFenceDirty()) {
    amd::Command* command = new amd::Marker(*hip_stream, kMarkerDisableFlush);
    if (command != nullptr) {
      command->enqueue();
      command->release();
    }
  }

  amd::Command* command = hip_stream->getLastQueuedCommand(true);
  if (command == nullptr) {
    // Nothing was submitted to the queue
    return hipSuccess;
  }

  amd::Event& event = command->event();
  if (command->type() != 0) {
    event.notifyCmdQueue();
  }

  // Check HW status of the ROCcrl event. Note: not all ROCclr modes support HW status
  bool ready = command->queue()->device().IsHwEventReady(event);
  if (!ready) {
    ready = (command->status() == CL_COMPLETE);
  }
  hipError_t status = ready ? hipSuccess : hipErrorNotReady;
  command->release();
  return status;
}

// ================================================================================================
hipError_t hipStreamQuery(hipStream_t stream) {
  HIP_INIT_API(hipStreamQuery, stream);
  HIP_RETURN(hipStreamQuery_common(stream));
}

// ================================================================================================
hipError_t hipStreamQuery_spt(hipStream_t stream) {
  HIP_INIT_API(hipStreamQuery, stream);
  PER_THREAD_DEFAULT_STREAM(stream);
  HIP_RETURN(hipStreamQuery_common(stream));
}

hipError_t streamCallback_common(hipStream_t stream, StreamCallback* cbo, void* userData) {
  if (!hip::isValid(stream)) {
    return hipErrorContextIsDestroyed;
  }

  hip::Stream* hip_stream = hip::getStream(stream);
  amd::Command* last_command = hip_stream->getLastQueuedCommand(true);
  amd::Command::EventWaitList eventWaitList;
  if (last_command != nullptr) {
    eventWaitList.push_back(last_command);
  }
  amd::Command* command = new amd::Marker(*hip_stream, !kMarkerDisableFlush, eventWaitList);
  if (command == nullptr) {
    return hipErrorInvalidValue;
  }
  if ((cbo == nullptr) || !command->setCallback(CL_COMPLETE, ihipStreamCallback, cbo)) {
    command->release();
    if (last_command != nullptr) {
      last_command->release();
    }
    return hipErrorInvalidHandle;
  }
  command->enqueue();
  // @note: don't release the command here, because it will be released after HIP callback
  if (last_command != nullptr) {
    last_command->release();
  }
  // Extra marker is required for HW event check, which is done before the callback is finished.
  // Add the new barrier to stall the stream, until the callback is done
  eventWaitList.clear();
  eventWaitList.push_back(command);
  amd::Command* block_command = new amd::Marker(*hip_stream, !kMarkerDisableFlush, eventWaitList);
  if (block_command == nullptr) {
    return hipErrorInvalidValue;
  }
  block_command->enqueue();

  // Release the callback marker
  command->release();
  // Notify the command queue about a possible waiter for the calback
  block_command->notifyCmdQueue();

  block_command->release();
  return hipSuccess;
}

// ================================================================================================
hipError_t hipStreamAddCallback_common(hipStream_t stream, hipStreamCallback_t callback,
                                       void* userData, unsigned int flags) {
  // flags - Reserved for future use, must be 0
  if (callback == nullptr || flags != 0) {
    return hipErrorInvalidValue;
  }
  StreamCallback* cbo = new StreamAddCallback(stream, callback, userData);
  return streamCallback_common(stream, cbo, userData);
}

// ================================================================================================
hipError_t hipStreamAddCallback(hipStream_t stream, hipStreamCallback_t callback, void* userData,
                                unsigned int flags) {
  HIP_INIT_API(hipStreamAddCallback, stream, callback, userData, flags);
  HIP_RETURN(hipStreamAddCallback_common(stream, callback, userData, flags));
}

// ================================================================================================
hipError_t hipStreamAddCallback_spt(hipStream_t stream, hipStreamCallback_t callback,
                                    void* userData, unsigned int flags) {
  HIP_INIT_API(hipStreamAddCallback, stream, callback, userData, flags);
  PER_THREAD_DEFAULT_STREAM(stream);
  HIP_RETURN(hipStreamAddCallback_common(stream, callback, userData, flags));
}

// ================================================================================================
hipError_t hipLaunchHostFunc_common(hipStream_t stream, hipHostFn_t fn, void* userData) {
  STREAM_CAPTURE(hipLaunchHostFunc, stream, fn, userData);
  if (fn == nullptr) {
    return hipErrorInvalidValue;
  }
  StreamCallback* cbo = new LaunchHostFuncCallback(fn, userData);
  return streamCallback_common(stream, cbo, userData);
}

// ================================================================================================
hipError_t hipLaunchHostFunc_spt(hipStream_t stream, hipHostFn_t fn, void* userData) {
  HIP_INIT_API(hipLaunchHostFunc, stream, fn, userData);
  PER_THREAD_DEFAULT_STREAM(stream);
  HIP_RETURN(hipLaunchHostFunc_common(stream, fn, userData));
}

// ================================================================================================
hipError_t hipLaunchHostFunc(hipStream_t stream, hipHostFn_t fn, void* userData) {
  HIP_INIT_API(hipLaunchHostFunc, stream, fn, userData);
  if (stream == nullptr && (hip::Stream::StreamCaptureOngoing(stream) == true)) {
    HIP_RETURN(hipErrorStreamCaptureImplicit);
  }
  HIP_RETURN(hipLaunchHostFunc_common(stream, fn, userData));
}

// ================================================================================================
hipError_t hipExtStreamCreateWithCUMask(hipStream_t* stream, uint32_t cuMaskSize,
                                        const uint32_t* cuMask) {
  HIP_INIT_API(hipExtStreamCreateWithCUMask, stream, cuMaskSize, cuMask);

  if (stream == nullptr) {
    HIP_RETURN(hipErrorInvalidHandle);
  }
  if (cuMaskSize == 0 || cuMask == nullptr) {
    HIP_RETURN(hipErrorInvalidValue);
  }

  const std::vector<uint32_t> cuMaskv(cuMask, cuMask + cuMaskSize);

  HIP_RETURN(ihipStreamCreate(stream, hipStreamDefault, hip::Stream::Priority::Normal, cuMaskv), *stream);
}

// ================================================================================================
hipError_t hipStreamGetPriority_common(hipStream_t stream, int* priority) {
  if ((priority != nullptr) && (stream == nullptr)) {
    *priority = 0;
    return hipSuccess;
  }

  if ((priority != nullptr) && (stream != nullptr)) {
    if (!hip::isValid(stream)) {
      return hipErrorContextIsDestroyed;
    }
    *priority = static_cast<int>(reinterpret_cast<hip::Stream*>(stream)->GetPriority());
  } else {
    return hipErrorInvalidValue;
  }

  return hipSuccess;
}

// ================================================================================================
hipError_t hipStreamGetPriority(hipStream_t stream, int* priority) {
  HIP_INIT_API(hipStreamGetPriority, stream, priority);
  HIP_RETURN(hipStreamGetPriority_common(stream, priority));
}

// ================================================================================================
hipError_t hipStreamGetPriority_spt(hipStream_t stream, int* priority) {
  HIP_INIT_API(hipStreamGetPriority, stream, priority);
  PER_THREAD_DEFAULT_STREAM(stream);
  HIP_RETURN(hipStreamGetPriority_common(stream, priority));
}

// ================================================================================================
hipError_t hipExtStreamGetCUMask(hipStream_t stream, uint32_t cuMaskSize, uint32_t* cuMask) {
  HIP_INIT_API(hipExtStreamGetCUMask, stream, cuMaskSize, cuMask);

  if (cuMask == nullptr) {
    HIP_RETURN(hipErrorInvalidValue);
  }

  int deviceId = hip::getCurrentDevice()->deviceId();
  auto* deviceHandle = g_devices[deviceId]->devices()[0];
  const auto& info = deviceHandle->info();

  // find the minimum cuMaskSize required to present the CU mask bit-array in a patch of 32 bits
  // and return error if the cuMaskSize argument is less than cuMaskSizeRequired
  uint32_t cuMaskSizeRequired = info.maxComputeUnits_ / 32 +
    ((info.maxComputeUnits_ % 32) ? 1 : 0);

  if (cuMaskSize < cuMaskSizeRequired) {
    HIP_RETURN(hipErrorInvalidValue);
  }

  // make a default CU mask bit-array where all CUs are active
  // this default mask will be returned when there is no
  // custom or global CU mask defined
  std::vector<uint32_t> defaultCUMask;
  uint32_t temp = 0;
  uint32_t bit_index = 0;
  for (uint32_t i = 0; i < info.maxComputeUnits_; i++) {
    temp |= 1UL << bit_index;
    if (bit_index >= 32) {
      defaultCUMask.push_back(temp);
      temp = 0;
      bit_index = 0;
      temp |= 1UL << bit_index;
    }
    bit_index += 1;
  }
  if (bit_index != 0) {
    defaultCUMask.push_back(temp);
  }

  // if the stream is null then either return globalCUMask_ (if it is defined)
  // or return defaultCUMask
  if (stream == nullptr || stream == hipStreamPerThread) {
    if (info.globalCUMask_.size() != 0) {
      std::copy(info.globalCUMask_.begin(), info.globalCUMask_.end(), cuMask);
    } else {
      std::copy(defaultCUMask.begin(), defaultCUMask.end(), cuMask);
    }
  } else {
  // if the stream is not null then get the stream's CU mask and return one of the below cases
  // case1 if globalCUMask_ is defined then return the AND of globalCUMask_ and stream's CU mask
  // case2 if globalCUMask_ is not defined then retuen AND of defaultCUMask and stream's CU mask
  // in both cases above if stream's CU mask is empty then either globalCUMask_ (for case1)
  // or defaultCUMask(for case2) will be returned
    std::vector<uint32_t> streamCUMask;
    streamCUMask = reinterpret_cast<hip::Stream*>(stream)->GetCUMask();
    std::vector<uint32_t> mask = {};
    if (info.globalCUMask_.size() != 0) {
      for (uint32_t i = 0; i < std::min(streamCUMask.size(), info.globalCUMask_.size()); i++) {
        mask.push_back(streamCUMask[i] & info.globalCUMask_[i]);
      }
    } else {
      for (uint32_t i = 0; i < std::min(streamCUMask.size(), defaultCUMask.size()); i++) {
        mask.push_back(streamCUMask[i] & defaultCUMask[i]);
      }
      // check to make sure after ANDing streamCUMask (custom-defined) with global CU mask,
      //we have non-zero mask, oterwise just return either globalCUMask_ or defaultCUMask
      bool zeroCUMask = true;
      for (auto m : mask) {
        if (m != 0) {
          zeroCUMask = false;
          break;
        }
      }
      if (zeroCUMask) {
        mask = (info.globalCUMask_.size() != 0) ? info.globalCUMask_ : defaultCUMask;
      }
      std::copy(mask.begin(), mask.end(), cuMask);
    }
  }
  HIP_RETURN(hipSuccess);
}

// ================================================================================================
hipError_t hipStreamGetDevice(hipStream_t stream, hipDevice_t* device) {
  HIP_INIT_API(hipStreamGetDevice, stream, device);

  if (device == nullptr) {
    HIP_RETURN(hipErrorInvalidValue);
  }

  if (!hip::isValid(stream)) {
    HIP_RETURN(hipErrorContextIsDestroyed);
  }

  if (stream == nullptr) {  // handle null stream
    // null stream is associated with current device, return the device id associated with the
    // current device
    *device = hip::getCurrentDevice()->deviceId();
  } else {
    getStreamPerThread(stream);
    *device = reinterpret_cast<hip::Stream*>(stream)->DeviceId();
  }

  HIP_RETURN(hipSuccess);
}
} // hip namespace
