src/Vulkan/VkGetProcAddress.cpp

   1 // Copyright 2018 The SwiftShader Authors. All Rights Reserved.
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //    http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 #include "VkGetProcAddress.h"
  16
  17 #include <unordered_map>
  18 #include <string>
  19
  20 #include <vulkan/vulkan.h>
  21
  22 namespace vk
  23 {
  24
  25 #define MAKE_VULKAN_GLOBAL_ENTRY(aFunction) { #aFunction, reinterpret_cast<PFN_vkVoidFunction>(aFunction) }
  26 static const std::unordered_map<std::string, PFN_vkVoidFunction> globalFunctionPointers =
  27 {
  28         MAKE_VULKAN_GLOBAL_ENTRY(vkCreateInstance),
  29         MAKE_VULKAN_GLOBAL_ENTRY(vkEnumerateInstanceExtensionProperties),
  30         MAKE_VULKAN_GLOBAL_ENTRY(vkEnumerateInstanceLayerProperties),
  31         MAKE_VULKAN_GLOBAL_ENTRY(vkEnumerateInstanceVersion),
  32 };
  33 #undef MAKE_VULKAN_GLOBAL_ENTRY
  34
  35 #define MAKE_VULKAN_INSTANCE_ENTRY(aFunction) { #aFunction, reinterpret_cast<PFN_vkVoidFunction>(aFunction) }
  36 static const std::unordered_map<std::string, PFN_vkVoidFunction> instanceFunctionPointers =
  37 {
  38         MAKE_VULKAN_INSTANCE_ENTRY(vkDestroyInstance),
  39         MAKE_VULKAN_INSTANCE_ENTRY(vkEnumeratePhysicalDevices),
  40         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceFeatures),
  41         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceFormatProperties),
  42         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceImageFormatProperties),
  43         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceProperties),
  44         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceQueueFamilyProperties),
  45         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceMemoryProperties),
  46         MAKE_VULKAN_INSTANCE_ENTRY(vkCreateDevice),
  47         MAKE_VULKAN_INSTANCE_ENTRY(vkEnumerateDeviceExtensionProperties),
  48         MAKE_VULKAN_INSTANCE_ENTRY(vkEnumerateDeviceLayerProperties),
  49         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceSparseImageFormatProperties),
  50         MAKE_VULKAN_INSTANCE_ENTRY(vkEnumeratePhysicalDeviceGroups),
  51         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceFeatures2),
  52         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceProperties2),
  53         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceFormatProperties2),
  54         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceImageFormatProperties2),
  55         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceQueueFamilyProperties2),
  56         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceMemoryProperties2),
  57         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceSparseImageFormatProperties2),
  58         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceExternalBufferProperties),
  59         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceExternalFenceProperties),
  60         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceExternalSemaphoreProperties),
  61         // VK_KHR_device_group_creation
  62         MAKE_VULKAN_INSTANCE_ENTRY(vkEnumeratePhysicalDeviceGroupsKHR),
  63         // VK_KHR_external_fence_capabilities
  64         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceExternalFencePropertiesKHR),
  65         // VK_KHR_external_memory_capabilities
  66         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceExternalBufferPropertiesKHR),
  67         // VK_KHR_external_semaphore_capabilities
  68         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceExternalSemaphorePropertiesKHR),
  69         // VK_KHR_get_physical_device_properties2
  70         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceFeatures2KHR),
  71         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceProperties2KHR),
  72         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceFormatProperties2KHR),
  73         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceImageFormatProperties2KHR),
  74         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceQueueFamilyProperties2KHR),
  75         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceMemoryProperties2KHR),
  76         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceSparseImageFormatProperties2KHR),
  77 #ifndef __ANDROID__
  78         // VK_KHR_surface
  79         MAKE_VULKAN_INSTANCE_ENTRY(vkDestroySurfaceKHR),
  80         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceSurfaceSupportKHR),
  81         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceSurfaceCapabilitiesKHR),
  82         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceSurfaceFormatsKHR),
  83         MAKE_VULKAN_INSTANCE_ENTRY(vkGetPhysicalDeviceSurfacePresentModesKHR),
  84 #endif
  85 #ifdef VK_USE_PLATFORM_XLIB_KHR
  86         // VK_KHR_xlib_surface
  87         MAKE_VULKAN_INSTANCE_ENTRY(vkCreateXlibSurfaceKHR),
  88 #endif
  89 };
  90 #undef MAKE_VULKAN_INSTANCE_ENTRY
  91
  92 #define MAKE_VULKAN_DEVICE_ENTRY(aFunction) { #aFunction, reinterpret_cast<PFN_vkVoidFunction>(aFunction) }
  93 static const std::unordered_map<std::string, PFN_vkVoidFunction> deviceFunctionPointers =
  94 {
  95         MAKE_VULKAN_DEVICE_ENTRY(vkGetInstanceProcAddr),
  96         MAKE_VULKAN_DEVICE_ENTRY(vkGetDeviceProcAddr),
  97         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyDevice),
  98         MAKE_VULKAN_DEVICE_ENTRY(vkGetDeviceQueue),
  99         MAKE_VULKAN_DEVICE_ENTRY(vkQueueSubmit),
 100         MAKE_VULKAN_DEVICE_ENTRY(vkQueueWaitIdle),
 101         MAKE_VULKAN_DEVICE_ENTRY(vkDeviceWaitIdle),
 102         MAKE_VULKAN_DEVICE_ENTRY(vkAllocateMemory),
 103         MAKE_VULKAN_DEVICE_ENTRY(vkFreeMemory),
 104         MAKE_VULKAN_DEVICE_ENTRY(vkMapMemory),
 105         MAKE_VULKAN_DEVICE_ENTRY(vkUnmapMemory),
 106         MAKE_VULKAN_DEVICE_ENTRY(vkFlushMappedMemoryRanges),
 107         MAKE_VULKAN_DEVICE_ENTRY(vkInvalidateMappedMemoryRanges),
 108         MAKE_VULKAN_DEVICE_ENTRY(vkGetDeviceMemoryCommitment),
 109         MAKE_VULKAN_DEVICE_ENTRY(vkBindBufferMemory),
 110         MAKE_VULKAN_DEVICE_ENTRY(vkBindImageMemory),
 111         MAKE_VULKAN_DEVICE_ENTRY(vkGetBufferMemoryRequirements),
 112         MAKE_VULKAN_DEVICE_ENTRY(vkGetImageMemoryRequirements),
 113         MAKE_VULKAN_DEVICE_ENTRY(vkGetImageSparseMemoryRequirements),
 114         MAKE_VULKAN_DEVICE_ENTRY(vkQueueBindSparse),
 115         MAKE_VULKAN_DEVICE_ENTRY(vkCreateFence),
 116         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyFence),
 117         MAKE_VULKAN_DEVICE_ENTRY(vkResetFences),
 118         MAKE_VULKAN_DEVICE_ENTRY(vkGetFenceStatus),
 119         MAKE_VULKAN_DEVICE_ENTRY(vkWaitForFences),
 120         MAKE_VULKAN_DEVICE_ENTRY(vkCreateSemaphore),
 121         MAKE_VULKAN_DEVICE_ENTRY(vkDestroySemaphore),
 122         MAKE_VULKAN_DEVICE_ENTRY(vkCreateEvent),
 123         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyEvent),
 124         MAKE_VULKAN_DEVICE_ENTRY(vkGetEventStatus),
 125         MAKE_VULKAN_DEVICE_ENTRY(vkSetEvent),
 126         MAKE_VULKAN_DEVICE_ENTRY(vkResetEvent),
 127         MAKE_VULKAN_DEVICE_ENTRY(vkCreateQueryPool),
 128         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyQueryPool),
 129         MAKE_VULKAN_DEVICE_ENTRY(vkGetQueryPoolResults),
 130         MAKE_VULKAN_DEVICE_ENTRY(vkCreateBuffer),
 131         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyBuffer),
 132         MAKE_VULKAN_DEVICE_ENTRY(vkCreateBufferView),
 133         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyBufferView),
 134         MAKE_VULKAN_DEVICE_ENTRY(vkCreateImage),
 135         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyImage),
 136         MAKE_VULKAN_DEVICE_ENTRY(vkGetImageSubresourceLayout),
 137         MAKE_VULKAN_DEVICE_ENTRY(vkCreateImageView),
 138         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyImageView),
 139         MAKE_VULKAN_DEVICE_ENTRY(vkCreateShaderModule),
 140         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyShaderModule),
 141         MAKE_VULKAN_DEVICE_ENTRY(vkCreatePipelineCache),
 142         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyPipelineCache),
 143         MAKE_VULKAN_DEVICE_ENTRY(vkGetPipelineCacheData),
 144         MAKE_VULKAN_DEVICE_ENTRY(vkMergePipelineCaches),
 145         MAKE_VULKAN_DEVICE_ENTRY(vkCreateGraphicsPipelines),
 146         MAKE_VULKAN_DEVICE_ENTRY(vkCreateComputePipelines),
 147         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyPipeline),
 148         MAKE_VULKAN_DEVICE_ENTRY(vkCreatePipelineLayout),
 149         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyPipelineLayout),
 150         MAKE_VULKAN_DEVICE_ENTRY(vkCreateSampler),
 151         MAKE_VULKAN_DEVICE_ENTRY(vkDestroySampler),
 152         MAKE_VULKAN_DEVICE_ENTRY(vkCreateDescriptorSetLayout),
 153         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyDescriptorSetLayout),
 154         MAKE_VULKAN_DEVICE_ENTRY(vkCreateDescriptorPool),
 155         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyDescriptorPool),
 156         MAKE_VULKAN_DEVICE_ENTRY(vkResetDescriptorPool),
 157         MAKE_VULKAN_DEVICE_ENTRY(vkAllocateDescriptorSets),
 158         MAKE_VULKAN_DEVICE_ENTRY(vkFreeDescriptorSets),
 159         MAKE_VULKAN_DEVICE_ENTRY(vkUpdateDescriptorSets),
 160         MAKE_VULKAN_DEVICE_ENTRY(vkCreateFramebuffer),
 161         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyFramebuffer),
 162         MAKE_VULKAN_DEVICE_ENTRY(vkCreateRenderPass),
 163         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyRenderPass),
 164         MAKE_VULKAN_DEVICE_ENTRY(vkGetRenderAreaGranularity),
 165         MAKE_VULKAN_DEVICE_ENTRY(vkCreateCommandPool),
 166         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyCommandPool),
 167         MAKE_VULKAN_DEVICE_ENTRY(vkResetCommandPool),
 168         MAKE_VULKAN_DEVICE_ENTRY(vkAllocateCommandBuffers),
 169         MAKE_VULKAN_DEVICE_ENTRY(vkFreeCommandBuffers),
 170         MAKE_VULKAN_DEVICE_ENTRY(vkBeginCommandBuffer),
 171         MAKE_VULKAN_DEVICE_ENTRY(vkEndCommandBuffer),
 172         MAKE_VULKAN_DEVICE_ENTRY(vkResetCommandBuffer),
 173         MAKE_VULKAN_DEVICE_ENTRY(vkCmdBindPipeline),
 174         MAKE_VULKAN_DEVICE_ENTRY(vkCmdSetViewport),
 175         MAKE_VULKAN_DEVICE_ENTRY(vkCmdSetScissor),
 176         MAKE_VULKAN_DEVICE_ENTRY(vkCmdSetLineWidth),
 177         MAKE_VULKAN_DEVICE_ENTRY(vkCmdSetDepthBias),
 178         MAKE_VULKAN_DEVICE_ENTRY(vkCmdSetBlendConstants),
 179         MAKE_VULKAN_DEVICE_ENTRY(vkCmdSetDepthBounds),
 180         MAKE_VULKAN_DEVICE_ENTRY(vkCmdSetStencilCompareMask),
 181         MAKE_VULKAN_DEVICE_ENTRY(vkCmdSetStencilWriteMask),
 182         MAKE_VULKAN_DEVICE_ENTRY(vkCmdSetStencilReference),
 183         MAKE_VULKAN_DEVICE_ENTRY(vkCmdBindDescriptorSets),
 184         MAKE_VULKAN_DEVICE_ENTRY(vkCmdBindIndexBuffer),
 185         MAKE_VULKAN_DEVICE_ENTRY(vkCmdBindVertexBuffers),
 186         MAKE_VULKAN_DEVICE_ENTRY(vkCmdDraw),
 187         MAKE_VULKAN_DEVICE_ENTRY(vkCmdDrawIndexed),
 188         MAKE_VULKAN_DEVICE_ENTRY(vkCmdDrawIndirect),
 189         MAKE_VULKAN_DEVICE_ENTRY(vkCmdDrawIndexedIndirect),
 190         MAKE_VULKAN_DEVICE_ENTRY(vkCmdDispatch),
 191         MAKE_VULKAN_DEVICE_ENTRY(vkCmdDispatchIndirect),
 192         MAKE_VULKAN_DEVICE_ENTRY(vkCmdCopyBuffer),
 193         MAKE_VULKAN_DEVICE_ENTRY(vkCmdCopyImage),
 194         MAKE_VULKAN_DEVICE_ENTRY(vkCmdBlitImage),
 195         MAKE_VULKAN_DEVICE_ENTRY(vkCmdCopyBufferToImage),
 196         MAKE_VULKAN_DEVICE_ENTRY(vkCmdCopyImageToBuffer),
 197         MAKE_VULKAN_DEVICE_ENTRY(vkCmdUpdateBuffer),
 198         MAKE_VULKAN_DEVICE_ENTRY(vkCmdFillBuffer),
 199         MAKE_VULKAN_DEVICE_ENTRY(vkCmdClearColorImage),
 200         MAKE_VULKAN_DEVICE_ENTRY(vkCmdClearDepthStencilImage),
 201         MAKE_VULKAN_DEVICE_ENTRY(vkCmdClearAttachments),
 202         MAKE_VULKAN_DEVICE_ENTRY(vkCmdResolveImage),
 203         MAKE_VULKAN_DEVICE_ENTRY(vkCmdSetEvent),
 204         MAKE_VULKAN_DEVICE_ENTRY(vkCmdResetEvent),
 205         MAKE_VULKAN_DEVICE_ENTRY(vkCmdWaitEvents),
 206         MAKE_VULKAN_DEVICE_ENTRY(vkCmdPipelineBarrier),
 207         MAKE_VULKAN_DEVICE_ENTRY(vkCmdBeginQuery),
 208         MAKE_VULKAN_DEVICE_ENTRY(vkCmdEndQuery),
 209         MAKE_VULKAN_DEVICE_ENTRY(vkCmdResetQueryPool),
 210         MAKE_VULKAN_DEVICE_ENTRY(vkCmdWriteTimestamp),
 211         MAKE_VULKAN_DEVICE_ENTRY(vkCmdCopyQueryPoolResults),
 212         MAKE_VULKAN_DEVICE_ENTRY(vkCmdPushConstants),
 213         MAKE_VULKAN_DEVICE_ENTRY(vkCmdBeginRenderPass),
 214         MAKE_VULKAN_DEVICE_ENTRY(vkCmdNextSubpass),
 215         MAKE_VULKAN_DEVICE_ENTRY(vkCmdEndRenderPass),
 216         MAKE_VULKAN_DEVICE_ENTRY(vkCmdExecuteCommands),
 217         MAKE_VULKAN_DEVICE_ENTRY(vkBindBufferMemory2),
 218         MAKE_VULKAN_DEVICE_ENTRY(vkBindImageMemory2),
 219         MAKE_VULKAN_DEVICE_ENTRY(vkGetDeviceGroupPeerMemoryFeatures),
 220         MAKE_VULKAN_DEVICE_ENTRY(vkCmdSetDeviceMask),
 221         MAKE_VULKAN_DEVICE_ENTRY(vkCmdDispatchBase),
 222         MAKE_VULKAN_DEVICE_ENTRY(vkGetImageMemoryRequirements2),
 223         MAKE_VULKAN_DEVICE_ENTRY(vkGetBufferMemoryRequirements2),
 224         MAKE_VULKAN_DEVICE_ENTRY(vkGetImageSparseMemoryRequirements2),
 225         MAKE_VULKAN_DEVICE_ENTRY(vkTrimCommandPool),
 226         MAKE_VULKAN_DEVICE_ENTRY(vkGetDeviceQueue2),
 227         MAKE_VULKAN_DEVICE_ENTRY(vkCreateSamplerYcbcrConversion),
 228         MAKE_VULKAN_DEVICE_ENTRY(vkDestroySamplerYcbcrConversion),
 229         MAKE_VULKAN_DEVICE_ENTRY(vkCreateDescriptorUpdateTemplate),
 230         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyDescriptorUpdateTemplate),
 231         MAKE_VULKAN_DEVICE_ENTRY(vkUpdateDescriptorSetWithTemplate),
 232         MAKE_VULKAN_DEVICE_ENTRY(vkGetDescriptorSetLayoutSupport),
 233         // VK_KHR_descriptor_update_template
 234         MAKE_VULKAN_DEVICE_ENTRY(vkCreateDescriptorUpdateTemplateKHR),
 235         MAKE_VULKAN_DEVICE_ENTRY(vkDestroyDescriptorUpdateTemplateKHR),
 236         MAKE_VULKAN_DEVICE_ENTRY(vkUpdateDescriptorSetWithTemplateKHR),
 237         // VK_KHR_device_group
 238         MAKE_VULKAN_DEVICE_ENTRY(vkGetDeviceGroupPeerMemoryFeaturesKHR),
 239         MAKE_VULKAN_DEVICE_ENTRY(vkCmdSetDeviceMaskKHR),
 240         MAKE_VULKAN_DEVICE_ENTRY(vkCmdDispatchBaseKHR),
 241         // VK_KHR_maintenance1
 242         MAKE_VULKAN_DEVICE_ENTRY(vkTrimCommandPoolKHR),
 243         // VK_KHR_sampler_ycbcr_conversion
 244         MAKE_VULKAN_DEVICE_ENTRY(vkCreateSamplerYcbcrConversionKHR),
 245         MAKE_VULKAN_DEVICE_ENTRY(vkDestroySamplerYcbcrConversionKHR),
 246         // VK_KHR_bind_memory2
 247         MAKE_VULKAN_DEVICE_ENTRY(vkBindBufferMemory2KHR),
 248         MAKE_VULKAN_DEVICE_ENTRY(vkBindImageMemory2KHR),
 249         // VK_KHR_get_memory_requirements2
 250         MAKE_VULKAN_DEVICE_ENTRY(vkGetImageMemoryRequirements2KHR),
 251         MAKE_VULKAN_DEVICE_ENTRY(vkGetBufferMemoryRequirements2KHR),
 252         MAKE_VULKAN_DEVICE_ENTRY(vkGetImageSparseMemoryRequirements2KHR),
 253         // VK_KHR_maintenance3
 254         MAKE_VULKAN_DEVICE_ENTRY(vkGetDescriptorSetLayoutSupportKHR),
 255 #ifndef __ANDROID__
 256         // VK_KHR_swapchain
 257         MAKE_VULKAN_DEVICE_ENTRY(vkCreateSwapchainKHR),
 258         MAKE_VULKAN_DEVICE_ENTRY(vkDestroySwapchainKHR),
 259         MAKE_VULKAN_DEVICE_ENTRY(vkGetSwapchainImagesKHR),
 260         MAKE_VULKAN_DEVICE_ENTRY(vkAcquireNextImageKHR),
 261         MAKE_VULKAN_DEVICE_ENTRY(vkQueuePresentKHR),
 262 #endif
 263 };
 264 #undef MAKE_VULKAN_DEVICE_ENTRY
 265
 266 PFN_vkVoidFunction GetInstanceProcAddr(VkInstance instance, const char* pName)
 267 {
 268         auto globalFunction = globalFunctionPointers.find(std::string(pName));
 269         if(globalFunction != globalFunctionPointers.end())
 270         {
 271                 return globalFunction->second;
 272         }
 273
 274         if(instance != VK_NULL_HANDLE)
 275         {
 276                 auto instanceFunction = instanceFunctionPointers.find(std::string(pName));
 277                 if(instanceFunction != instanceFunctionPointers.end())
 278                 {
 279                         return instanceFunction->second;
 280                 }
 281
 282                 auto deviceFunction = deviceFunctionPointers.find(std::string(pName));
 283                 if(deviceFunction != deviceFunctionPointers.end())
 284                 {
 285                         return deviceFunction->second;
 286                 }
 287         }
 288
 289         return nullptr;
 290 }
 291
 292 PFN_vkVoidFunction GetDeviceProcAddr(VkDevice device, const char* pName)
 293 {
 294         auto deviceFunction = deviceFunctionPointers.find(std::string(pName));
 295         if(deviceFunction != deviceFunctionPointers.end())
 296         {
 297                 return deviceFunction->second;
 298         }
 299
 300         return nullptr;
 301 }
 302
 303 }