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  • Committer: Bazaar Package Importer
  • Author(s): Alessandro Ghersi
  • Date: 2009-11-02 18:30:08 UTC
  • mfrom: (1.2.2 upstream)
  • mto: (15.2.5 experimental)
  • mto: This revision was merged to the branch mainline in revision 88.
  • Revision ID: james.westby@ubuntu.com-20091102183008-b6a4gcs128mvfb3m
Tags: upstream-4.6.0~beta1
Import upstream version 4.6.0~beta1

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src/3rdparty/webkit/JavaScriptCore/wtf/StdLibExtras.h
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
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 */
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#ifndef WTF_StdLibExtras_h
 
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#define WTF_StdLibExtras_h
 
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#include <wtf/Platform.h>
 
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#include <wtf/Assertions.h>
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// Use these to declare and define a static local variable (static T;) so that
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//  it is leaked so that its destructors are not called at exit. Using this
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#define DEFINE_STATIC_LOCAL(type, name, arguments) \
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    static type& name = *new type arguments
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#endif
 
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// OBJECT_OFFSETOF: Like the C++ offsetof macro, but you can use it with classes.
 
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// The magic number 0x4000 is insignificant. We use it to avoid using NULL, since
 
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// NULL can cause compiler problems, especially in cases of multiple inheritance.
 
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#define OBJECT_OFFSETOF(class, field) (reinterpret_cast<ptrdiff_t>(&(reinterpret_cast<class*>(0x4000)->field)) - 0x4000)
 
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namespace WTF {
 
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    /*
 
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     * C++'s idea of a reinterpret_cast lacks sufficient cojones.
 
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     */
 
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    template<typename TO, typename FROM>
 
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    TO bitwise_cast(FROM from)
 
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    {
 
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        COMPILE_ASSERT(sizeof(TO) == sizeof(FROM), WTF_bitwise_cast_sizeof_casted_types_is_equal);
 
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        union {
 
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            FROM from;
 
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            TO to;
 
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        } u;
 
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        u.from = from;
 
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        return u.to;
 
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    }
 
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} // namespace WTF
 
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#endif