add init check interface

src/framework/cl/cl_engine.cpp

@@ -27,9 +27,9 @@ bool CLEngine::Init() {
     return true;
   }
   cl_int status;
-  SetPlatform();
-  SetClDeviceId();
-
+  bool is_setplatform_success = SetPlatform();
+  bool is_setcldeviceid_success = SetClDeviceId();
+  is_init_success_ = is_setplatform_success && is_setcldeviceid_success;
   initialized_ = true;
   return initialized_;
   //  setClCommandQueue();
@@ -44,11 +44,14 @@ CLEngine *CLEngine::Instance() {
   return &cl_engine_;
 }
 
+bool CLEngine::isInitSuccess() { return is_init_success_; }
 bool CLEngine::SetPlatform() {
   platform_ = NULL;      // the chosen platform
   cl_uint numPlatforms;  // the NO. of platforms
   cl_int status = clGetPlatformIDs(0, NULL, &numPlatforms);
-
+  if (status != CL_SUCCESS) {
+    return false;
+  }
   /**For clarity, choose the first available platform. */
   if (numPlatforms > 0) {
     cl_platform_id *platforms = reinterpret_cast<cl_platform_id *>(
@@ -56,10 +59,10 @@ bool CLEngine::SetPlatform() {
     status = clGetPlatformIDs(numPlatforms, platforms, NULL);
     platform_ = platforms[0];
     free(platforms);
-    return true;
-  } else {
-    return false;
+    return status == CL_SUCCESS;
   }
+
+  return false;
 }
 
 bool CLEngine::SetClDeviceId() {
@@ -67,13 +70,15 @@ bool CLEngine::SetClDeviceId() {
   devices_ = NULL;
   cl_int status =
       clGetDeviceIDs(platform_, CL_DEVICE_TYPE_GPU, 0, NULL, &numDevices);
-
+  if (status != CL_SUCCESS) {
+    return false;
+  }
   if (numDevices > 0) {
     devices_ = reinterpret_cast<cl_device_id *>(
         malloc(numDevices * sizeof(cl_device_id)));
     status = clGetDeviceIDs(platform_, CL_DEVICE_TYPE_GPU, numDevices, devices_,
                             NULL);
-    return true;
+    return status == CL_SUCCESS;
   }
   return false;
 }

src/framework/cl/cl_engine.h

@@ -31,7 +31,7 @@ class CLEngine {
   static CLEngine *Instance();
 
   bool Init();
-
+  bool isInitSuccess();
   std::unique_ptr<_cl_context, CLContextDeleter> CreateContext() {
     cl_int status;
     cl_context c = clCreateContext(NULL, 1, devices_, NULL, NULL, &status);
@@ -51,6 +51,20 @@ class CLEngine {
     return std::move(command_queue_ptr);
   }
 
+  cl_context getContext() {
+    if (context_ == nullptr) {
+      context_ = CreateContext();
+    }
+    return context_.get();
+  }
+
+  cl_command_queue getClCommandQueue() {
+    if (command_queue_ == nullptr) {
+      command_queue_ = CreateClCommandQueue(getContext());
+    }
+    return command_queue_.get();
+  }
+
   std::unique_ptr<_cl_program, CLProgramDeleter> CreateProgramWith(
       cl_context context, std::string file_name) {
     FILE *file = fopen(file_name.c_str(), "rb");
@@ -137,6 +151,11 @@ class CLEngine {
   std::string cl_path_;
   std::unique_ptr<_cl_program, CLProgramDeleter> program_;
 
+  std::unique_ptr<_cl_context, CLContextDeleter> context_ = nullptr;
+
+  std::unique_ptr<_cl_command_queue, CLCommQueueDeleter> command_queue_ =
+      nullptr;
+
   //  bool SetClContext();
 
   //  bool SetClCommandQueue();
@@ -144,6 +163,7 @@ class CLEngine {
   //  bool LoadKernelFromFile(const char *kernel_file);
 
   //  bool BuildProgram();
+  bool is_init_success_ = false;
 };
 
 }  // namespace framework

src/framework/cl/cl_scope.h

@@ -29,12 +29,12 @@ namespace framework {
 class CLScope {
  public:
   CLScope() {
-    CLEngine *engin = CLEngine::Instance();
-    context_ = engin->CreateContext();
-    command_queue_ = engin->CreateClCommandQueue(context_.get());
+    CLEngine *engine = CLEngine::Instance();
+    context_ = engine->getContext();
+    command_queue_ = engine->getClCommandQueue();
   }
 
-  cl_command_queue CommandQueue() { return command_queue_.get(); }
+  cl_command_queue CommandQueue() { return command_queue_; }
 
   std::unique_ptr<_cl_kernel, CLKernelDeleter> GetKernel(
       const std::string &kernel_name, const std::string &file_name) {
@@ -49,7 +49,7 @@ class CLScope {
     return std::move(kernel);
   }
 
-  cl_context Context() { return context_.get(); }
+  cl_context Context() { return context_; }
 
   cl_program Program(const std::string &file_name) {
     auto it = programs_.find(file_name);
@@ -58,7 +58,7 @@ class CLScope {
     }
 
     auto program = CLEngine::Instance()->CreateProgramWith(
-        context_.get(),
+        context_,
         CLEngine::Instance()->GetCLPath() + "/cl_kernel/" + file_name);
 
     DLOG << " --- begin build program -> " << file_name << " --- ";
@@ -72,8 +72,8 @@ class CLScope {
 
  private:
   cl_int status_;
-  std::unique_ptr<_cl_context, CLContextDeleter> context_;
-  std::unique_ptr<_cl_command_queue, CLCommQueueDeleter> command_queue_;
+  cl_context context_;
+  cl_command_queue command_queue_;
   std::unordered_map<std::string,
                      std::unique_ptr<_cl_program, CLProgramDeleter>>
       programs_;