wtf/ValueCheck.h

   1 /*
   2  * Copyright (C) 2010 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. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef ValueCheck_h
  27 #define ValueCheck_h
  28
  29 // For malloc_size and _msize.
  30 #if OS(DARWIN)
  31 #include <malloc/malloc.h>
  32 #elif COMPILER(MSVC)
  33 #include <malloc.h>
  34 #endif
  35
  36 namespace WTF {
  37
  38 template<typename T> struct ValueCheck {
  39     typedef T TraitType;
  40     static void checkConsistency(const T&) { }
  41 };
  42
  43 #if !ASSERT_DISABLED
  44 template<typename P> struct ValueCheck<P*> {
  45     typedef P* TraitType;
  46     static void checkConsistency(const P* p)
  47     {
  48         if (!p)
  49             return;
  50 #if (defined(USE_SYSTEM_MALLOC) && USE_SYSTEM_MALLOC) || !defined(NDEBUG)
  51 #if OS(DARWIN)
  52         ASSERT(malloc_size(p));
  53 #elif COMPILER(MSVC)
  54         ASSERT(_msize(const_cast<P*>(p)));
  55 #endif
  56 #endif
  57         ValueCheck<P>::checkConsistency(*p);
  58     }
  59 };
  60 #endif
  61
  62 }
  63
  64 #endif // ValueCheck_h