Method IpcAttach

rocclr/device/device.cpp:1066–1097

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// ================================================================================================
bool Device::IpcAttach(const char* handle, size_t mem_size, size_t mem_offset, unsigned int flags,
                       void** dev_ptr) const {
  amd::Memory* amd_mem_obj = nullptr;

  // Create an amd Memory object for the handle
  amd_mem_obj = new (context()) amd::IpcBuffer(context(), flags, mem_offset, mem_size, handle);
  if (amd_mem_obj == nullptr) {
    LogError("failed to create a mem object!");
    return false;
  }

  if (!amd_mem_obj->create(nullptr)) {
    LogError("failed to create a svm hidden buffer!");
    amd_mem_obj->release();
    return false;
  }

  auto mem_obj_exist = amd::MemObjMap::FindMemObj(amd_mem_obj->getSvmPtr());
  if (mem_obj_exist == nullptr) {
    // Add the original mem_ptr to the MemObjMap with newly created amd_mem_obj
    amd::MemObjMap::AddMemObj(amd_mem_obj->getSvmPtr(), amd_mem_obj);
  } else {
    amd_mem_obj->release();
    amd_mem_obj = mem_obj_exist;
    // Memory already exists, just retain the old one.
    amd_mem_obj->retain();
  }

  *dev_ptr = amd_mem_obj->getSvmPtr();

  return true;
}

// ================================================================================================
void Device::IpcDetach(amd::Memory* amd_mem_obj) const {