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Diffstat (limited to 'JavaScriptCore/wtf/StdLibExtras.h')
-rw-r--r-- | JavaScriptCore/wtf/StdLibExtras.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/JavaScriptCore/wtf/StdLibExtras.h b/JavaScriptCore/wtf/StdLibExtras.h new file mode 100644 index 0000000..14227ab --- /dev/null +++ b/JavaScriptCore/wtf/StdLibExtras.h @@ -0,0 +1,63 @@ +/* + * Copyright (C) 2008 Apple Inc. All Rights Reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef WTF_StdLibExtras_h +#define WTF_StdLibExtras_h + +#include <wtf/Platform.h> +#include <wtf/Assertions.h> + +// Use these to declare and define a static local variable (static T;) so that +// it is leaked so that its destructors are not called at exit. Using this +// macro also allows workarounds a compiler bug present in Apple's version of GCC 4.0.1. +#if COMPILER(GCC) && defined(__APPLE_CC__) && __GNUC__ == 4 && __GNUC_MINOR__ == 0 && __GNUC_PATCHLEVEL__ == 1 +#define DEFINE_STATIC_LOCAL(type, name, arguments) \ + static type* name##Ptr = new type arguments; \ + type& name = *name##Ptr +#else +#define DEFINE_STATIC_LOCAL(type, name, arguments) \ + static type& name = *new type arguments +#endif + +namespace WTF { + + /* + * C++'s idea of a reinterpret_cast lacks sufficient cojones. + */ + template<typename TO, typename FROM> + TO bitwise_cast(FROM in) + { + COMPILE_ASSERT(sizeof(TO) == sizeof(FROM), WTF_wtf_reinterpret_cast_sizeof_types_is_equal); + union { + FROM from; + TO to; + } u; + u.from = in; + return u.to; + } + +} // namespace WTF + +#endif |