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      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
     65