heap/GCAssertions.h

   1 /*
   2  * Copyright (C) 2012 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  23  * THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef GCAssertions_h
  27 #define GCAssertions_h
  28
  29 #include <type_traits>
  30 #include <wtf/Assertions.h>
  31
  32 #if ENABLE(GC_VALIDATION)
  33 #define ASSERT_GC_OBJECT_LOOKS_VALID(cell) do { \
  34     RELEASE_ASSERT(cell);\
  35     RELEASE_ASSERT(cell->structure()->structure() == cell->structure()->structure()->structure()); \
  36 } while (0)
  37
  38 #define ASSERT_GC_OBJECT_INHERITS(object, classInfo) do {\
  39     ASSERT_GC_OBJECT_LOOKS_VALID(object); \
  40     RELEASE_ASSERT(object->inherits(classInfo)); \
  41 } while (0)
  42
  43 #else
  44 #define ASSERT_GC_OBJECT_LOOKS_VALID(cell) do { (void)cell; } while (0)
  45 #define ASSERT_GC_OBJECT_INHERITS(object, classInfo) do { (void)object; (void)classInfo; } while (0)
  46 #endif
  47
  48 #if COMPILER(CLANG)
  49 #define STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(klass) static_assert(std::is_trivially_destructible<klass>::value, #klass " must have a trivial destructor")
  50 #elif COMPILER(MSVC)
  51 // An earlier verison of the C++11 spec used to call this type trait std::has_trivial_destructor, and that's what MSVC uses.
  52 #define STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(klass) static_assert(std::has_trivial_destructor<klass>::value, #klass " must have a trivial destructor")
  53 #else
  54 // This is not enabled on GCC due to http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52702
  55 #define STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(klass)
  56 #endif
  57
  58 #endif // GCAssertions_h