diff options
Diffstat (limited to 'src/3rdparty/javascriptcore/JavaScriptCore/wtf/StdLibExtras.h')
| -rw-r--r-- | src/3rdparty/javascriptcore/JavaScriptCore/wtf/StdLibExtras.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StdLibExtras.h b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StdLibExtras.h index d21d1ff..9dfb969 100644 --- a/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StdLibExtras.h +++ b/src/3rdparty/javascriptcore/JavaScriptCore/wtf/StdLibExtras.h @@ -32,6 +32,7 @@ // 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. +#ifndef DEFINE_STATIC_LOCAL #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; \ @@ -40,12 +41,17 @@ #define DEFINE_STATIC_LOCAL(type, name, arguments) \ static type& name = *new type arguments #endif +#endif // OBJECT_OFFSETOF: Like the C++ offsetof macro, but you can use it with classes. // The magic number 0x4000 is insignificant. We use it to avoid using NULL, since // NULL can cause compiler problems, especially in cases of multiple inheritance. #define OBJECT_OFFSETOF(class, field) (reinterpret_cast<ptrdiff_t>(&(reinterpret_cast<class*>(0x4000)->field)) - 0x4000) +// STRINGIZE: Can convert any value to quoted string, even expandable macros +#define STRINGIZE(exp) #exp +#define STRINGIZE_VALUE_OF(exp) STRINGIZE(exp) + namespace WTF { /* @@ -63,6 +69,14 @@ namespace WTF { return u.to; } + // Returns a count of the number of bits set in 'bits'. + inline size_t bitCount(unsigned bits) + { + bits = bits - ((bits >> 1) & 0x55555555); + bits = (bits & 0x33333333) + ((bits >> 2) & 0x33333333); + return (((bits + (bits >> 4)) & 0xF0F0F0F) * 0x1010101) >> 24; + } + } // namespace WTF #endif |