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runtime/vm/dart_api_impl.h

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef RUNTIME_VM_DART_API_IMPL_H_
 #define RUNTIME_VM_DART_API_IMPL_H_
 
 #include "vm/allocation.h"
 #include "vm/native_arguments.h"
 #include "vm/object.h"
@@ skipping 67 matching lines @@
     } else if (tmp.IsError()) {                                                \
       return dart_handle;                                                      \
     }                                                                          \
     return Api::NewError("%s expects argument '%s' to be of type %s.",         \
                          CURRENT_FUNC, #dart_handle, #type);                   \
   } while (0)
 
 
 #define RETURN_NULL_ERROR(parameter)                                           \
   return Api::NewError("%s expects argument '%s' to be non-null.",             \
-                       CURRENT_FUNC, #parameter);
+                       CURRENT_FUNC, #parameter)
 
+#define CHECK_NULL(parameter)                                                  \
+  if (parameter == NULL) {                                                     \
+    RETURN_NULL_ERROR(parameter);                                              \
+  }
 
 #define CHECK_LENGTH(length, max_elements)                                     \
   do {                                                                         \
     intptr_t len = (length);                                                   \
     intptr_t max = (max_elements);                                             \
     if (len < 0 || len > max) {                                                \
       return Api::NewError(                                                    \
           "%s expects argument '%s' to be in the range [0..%" Pd "].",         \
           CURRENT_FUNC, #length, max);                                         \
     }                                                                          \
@@ skipping 196 matching lines @@
     return Api::NewError("%s: Cannot load after Dart_Precompile",              \
                          CURRENT_FUNC);                                        \
   }
 
 #define ASSERT_CALLBACK_STATE(thread)                                          \
   ASSERT(thread->no_callback_scope_depth() == 0)
 
 }  // namespace dart.
 
 #endif  // RUNTIME_VM_DART_API_IMPL_H_